Dr Zhongwei Chen
Senior Lecturer
School of Mechanical and Mining Engineering
+61 7 336 53742
Researcher biography
Conduct interdisciplinary researches to tackle technical challenges associated with the efficient and responsible extraction of geo-energy and geo-resources. Two main focusses of my research interests are:
- The mining geomechanics for underground mining applications, coal mining in particular. It covers roadway support design stability analysis, pillar design, strata movement and surface subsidence, and
- The reservoir geomechanics, targeting at key technical challenges associated with unconventional gas recovery. It includes borehole stability, permeability evolution, coal and shale petrophysical properties characterisation, fluid flow in fractured porous media, carbon geological sequestration, and the coupled computational modelling etc.
Teaching Courses:
- Mine Geotechnical Engineering (MINE4120)
- Coal Mine Strata Control (MINE4128)
Manager of Resources Geomechanics Lab, focussing on:
- Rock dynamic responses to different stress conditions using non-destructive methods (Acoustic Emission and Ultrasonic Detection, e.g., P-wave and S-wave)
- Characterization of water-gas two-phase flow in fractured porous media under high-stress environment (up to 10,000 psi)
- Characterization of two-phase flow using microfluidics technique
- Quantifying the evolution of the absolution and relative permeability of unconventional reservoirs (e.g., coals, shales, and tight sandstones) to gas adsorption as well as the changes of contact angle with varying reservoir pressure
- Coupled geomechanical-hydraulic multiscale flow simulation: from nanopores to reservoir scale
Book Chapters
Wei, M. Y., Chen, Z. W., Liu, J. S., Cui, G. L., Tan, Y. L. and Zhang, S. W. (2017). Multiphysics of coal-gas interactions. Rock mechanics and engineering, Volume 3: analysis, modeling and design. (pp. 483-512) edited by Xia-Ting Feng. London, United Kingdom: CRC Press. doi: 10.1201/b20402
Wei, M. Y. , Chen, Z. W. , Liu, J. S. , Cui, G. L. , Tan, Y. L. and Zhang, S. W. (2017). Multiphysics of coal-gas interactions. Analysis, modeling and design. (pp. 481-512) Amsterdam, The Netherlands: CRC Press.
Chen, Zhongwei, Bai, Tianhang and Pan, Zhejun (2016). Coal reservoir characterization. Coal production and processing technology. (pp. 79-100) edited by M. R. Riazi and Rajender Gupta. Boca Raton, FL, United States: CRC Press (Taylor and Francis). doi: 10.1201/b19352-6
Qu, H, Liu, J.S, Zhongwei Chen, Connell, Pan and Connell, L. (2011). A fully coupled gas flow, coal deformation and thermal transport model for the injection of carbon dioxide into coal seams. CO2 storage in carboniferous formations and abandoned coal mines. (pp. 69-93) edited by Manchao He, Luis Ribeiro e Sousa, Derek Elsworth and EurÃpedes Vargas. Leiden, The Netherlands: CRC Press/Balkema.
Journal Articles
Zheng, Chunshan, Liu, Shuaili, Xue, Sheng, Jiang, Bingyou and Chen, Zhongwei (2022). Effects of chemical solvents on coal pore structural and fractal characteristics: an experimental investigation. Fuel, 327 125246, 1-11. doi: 10.1016/j.fuel.2022.125246
Zhu, Yiran, Shi, Zhang, Zuo, Shengjie, Qu, Qingdong, Yan, Xinlu, Kuznetsov, Dan, Nehring, Micah and Chen, Zhongwei (2022). Dewatering optimization of coal seam gas production wells: a review and future perspectives. Energy and Fuels, 36 (17), 9785-9820. doi: 10.1021/acs.energyfuels.2c01575
Huang, Pengyu, Shen, Luming, Maggi, Federico, Chen, Zhongwei and Pan, Zhejun (2022). Influence of surface roughness on methane flow in shale kerogen nano-slits. Journal of Natural Gas Science and Engineering, 103 104650, 1-12. doi: 10.1016/j.jngse.2022.104650
Zhu, Yiran, Shi, Zhang, Xing, Huilin and Chen, Zhongwei (2022). An improved capillary pressure model for coal seam gas reservoirs. Journal of Natural Gas Science and Engineering, 102 104551, 104551. doi: 10.1016/j.jngse.2022.104551
Masoudian, Mohsen S., Chen, Zhongwei and Leonardi, Christopher (2022). Poroelastic solution of a wellbore in a swelling rock with non-hydrostatic stress field. Journal of Rock Mechanics and Geotechnical Engineering, 14 (2), 303-314. doi: 10.1016/j.jrmge.2021.05.003
Zheng, Chunshan, Jiang, Bingyou, Yuan, Liang, Kizil, Mehmet, Xue, Sheng, Han, Baiqing, Tang, Mingyun and Chen, Zhongwei (2021). Effects of heterogenous interburden Young's modulus on permeability characteristics of underlying relieved coal seam: implementation of damage-based permeability model. Journal of Natural Gas Science and Engineering, 96 104317, 104317. doi: 10.1016/j.jngse.2021.104317
Calderon, Angelica Guerrero, Duan, Haoran, Chen, Xiaoguang, Wu, Ziping, Yu, Wenbo, Silva, Carlos E., Li, Yijing, Shrestha, Sohan, Wang, Zhiyao, Keller, Jurg, Chen, Zhongwei, Yuan, Zhiguo and Hu, Shihu (2021). Enhancing anaerobic digestion using Free Nitrous Acid: identifying the optimal pre-treatment condition in continuous operation. Water Research, 205 117694, 117694. doi: 10.1016/j.watres.2021.117694
Saberhosseini, Seyed Erfan, Chen, Zhongwei and Sarmadivaleh, Mohammad (2021). Multiple fracture growth in modified zipper fracturing. International Journal of Geomechanics, 21 (7) 2040. doi: 10.1061/(ASCE)GM.1943-5622.0002040
Wang, Chunguang, Zhang, Jidong, Zang, Yuxiao, Zhong, Ruizhi, Wang, Jianguo, Wu, Yu, Jiang, Yujing and Chen, Zhongwei (2021). Time-dependent coal permeability: impact of gas transport from coal cleats to matrices. Journal of Natural Gas Science and Engineering, 88 103806, 103806. doi: 10.1016/j.jngse.2021.103806
Hosseini, Erfan, Sarmadivaleh, Mohammad and Chen, Zhongwei (2021). Developing a new algorithm for numerical modeling of discrete fracture network (DFN) for anisotropic rock and percolation properties. Journal of Petroleum Exploration and Production, 11 (2), 839-856. doi: 10.1007/s13202-020-01079-w
Wang, Chunguang, Zhang, Jidong, Chen, Junguo, Zhong, Ruizhi, Cui, Guanglei, Jiang, Yujing, Liu, Weitao and Chen, Zhongwei (2021). Understanding competing effect between sorption swelling and mechanical compression on coal matrix deformation and its permeability. International Journal of Rock Mechanics and Mining Sciences, 138 104639, 104639. doi: 10.1016/j.ijrmms.2021.104639
Xue, Sheng, Zheng, Chunshan, Kizil, Mehmet, Jiang, Bingyou, Wang, Zhigen, Tang, Mingyun and Chen, Zhongwei (2021). Coal permeability models for enhancing performance of clean gas drainage: a review. Journal of Petroleum Science and Engineering, 199 108283, 108283. doi: 10.1016/j.petrol.2020.108283
Cui, Guanglei, Chen, Tianyu, Feng, Xiating, Chen, Zhongwei, Elsworth, Derek, Yu, Hongwen, Zheng, Xu and Pan, Zhejun (2020). Coupled multiscale-modeling of microwave-heating-induced fracturing in shales. International Journal of Rock Mechanics and Mining Sciences, 136 104520, 104520. doi: 10.1016/j.ijrmms.2020.104520
Zhu, Yiran, Xing, Huilin, Rudolph, Victor and Chen, Zhongwei (2020). Quantifying the impact of capillary trapping on coal seam gas recovery. Journal of Natural Gas Science and Engineering, 83 103588, 103588. doi: 10.1016/j.jngse.2020.103588
Hosseini, Erfan, Chen, Zhongwei, Sarmadivaleh, Mohammad and Mohammadnazar, Dana (2020). Applying low-salinity water to alter wettability in carbonate oil reservoirs: an experimental study. Journal of Petroleum Exploration and Production Technology, 11 (1), 451-475. doi: 10.1007/s13202-020-01015-y
Raza, Syed Shabbar, Rudolph, Victor, Rufford, Tom and Chen, Zhongwei (2020). A stochastic method to estimate the anisotropic stress-dependent coal permeability by pore-volume distribution and stress-strain measurements. SPE Journal, 25 (5), 2582-2600. doi: 10.2118/198260-pa
Zhang, Jicheng, Si, Leilei, Chen, Junguo, Kizil, Mehmet, Wang, Chunguang and Chen, Zhongwei (2020). Stimulation techniques of coalbed methane reservoirs. Geofluids, 2020 5152646, 1-23. doi: 10.1155/2020/5152646
Fan, Kunkun, Sun, Renyuan, Elsworth, Derek, Dong, Mingzhe, Yajun, L. I., Yin, Congbin, Yanchao, L. I., Chen, Zhongwei and Wang, Chunguang (2020). Radial permeability measurements for shale using variable pressure gradients. Acta Geologica Sinica, 94 (2), 269-279. doi: 10.1111/1755-6724.14304
Zheng, Chunshan, Li, He, Kizil, Mehmet, Jiang, Bingyou, Xue, Sheng, Yang, Wei and Chen, Zhongwei (2020). Performance enhancement of horizontal underground-to-inseam gas drainage boreholes with double-phase-grouting sealing method for coal mining safety and clean gas resource. Journal of Natural Gas Science and Engineering, 76 103179, 1-13. doi: 10.1016/j.jngse.2020.103179
Barbosa, Karina, Esterle, Joan and Chen, Zhongwei (2020). Scaling compressive strength from mini-cylinder specimens of sub-bituminous coal. Rock Mechanics and Rock Engineering, 53 (6), 2839-2853. doi: 10.1007/s00603-020-02083-6
Zhao, Yue, Taheri, Abbas, Karakus, Murat, Chen, Zhongwei and Deng, An (2020). Effects of water content, water type and temperature on the rheological behaviour of slag-cement and fly ash-cement paste backfill. International Journal of Mining Science and Technology, 30 (3), 271-278. doi: 10.1016/j.ijmst.2020.03.003
Zhong, Ruizhi, Johnson Jr, Raymond and Chen, Zhongwei (2020). Generating pseudo density log from drilling and logging-while-drilling data using extreme gradient boosting (XGBoost). International Journal of Coal Geology, 220 103416, 1-13. doi: 10.1016/j.coal.2020.103416
Zhong, Ruizhi, Johnson, Raymond L. and Chen, Zhongwei (2020). Using machine learning methods to identify coal pay zones from drilling and Logging-While-Drilling (LWD) data. SPE Journal, 25 (03), 1241-1258. doi: 10.2118/198288-pa
Song, Weiqiang, Shi, Xian, Wang, Chunguang, Xu, Jianchun, Chen, Shaojie and Chen, Zhongwei (2020). Predicting the radial heat transfer in the wellbore of cryogenic nitrogen fracturing: Insights into stimulating underground reservoir. Energy Science and Engineering, 8 (3) ese3.479, 582-591. doi: 10.1002/ese3.479
Chaitanya, G. V. A., Kamble, S., Lollchund, R.M., Gupta, G.S. and Chen, Z. (2020). Modelling of shaft based processes. Mineral Processing and Extractive Metallurgy, 129 (2), 1-9. doi: 10.1080/25726641.2020.1714210
Barbosa, Karina, Esterle, Joan, Van De Wetering, Nikola and Chen, Zhongwei (2020). Shore hardness measurements of sub-bituminous coal microlithotypes. International Journal of Coal Geology, 217 103341, 103341. doi: 10.1016/j.coal.2019.103341
Meng, Jia, Duan, Haoran, Li, Huijuan, Watts, Shane, Liu, Peng, Shrestha, Sohan, Zheng, Min, Yu, Wenbo, Chen, Zhongwei, Song, Yarong, Dwyer, Jason, Hu, Shihu and Yuan, Zhiguo (2020). Free nitrous acid pre-treatment enhances anaerobic digestion of waste activated sludge and rheological properties of digested sludge: a pilot-scale study. Water Research, 172 115515, 1-9. doi: 10.1016/j.watres.2020.115515
Shrestha, Sohan, Sharma, Keshab, Chen, Zhongwei and Yuan, Zhiguo (2019). Unravelling the influences of sewer-dosed iron salts on activated sludge properties with implications on settleability, dewaterability and sludge rheology. Water Research, 167 115089, 115089. doi: 10.1016/j.watres.2019.115089
Barbosa, Karina, Esterle, Joan, Bonfils, Benjamin and Chen, Zhongwei (2019). The use of short impact load cell to derive geomechanical properties of sub-bituminous coal and mudstone. Journal of Natural Gas Science and Engineering, 72 103018, 103018. doi: 10.1016/j.jngse.2019.103018
Wang, Chunguang, Zang, Yuxiao, Wang, Linsen, Chen, Zhongwei, Cui, Guanglei, Fan, Kunkun and Liu, Weitao (2019). Interaction of cleat-matrix on coal permeability from experimental observations and numerical analysis. Geofluids, 2019 7474587, 1-15. doi: 10.1155/2019/7474587
Si, Leilei, Li, Zenghua, Kizil, Mehmet, Chen, Zhongwei, Yang, Yongliang and Ji, Songtao (2019). The influence of closed pores on the gas transport and its application in coal mine gas extraction. Fuel, 254 115605, 115605. doi: 10.1016/j.fuel.2019.06.013
Barbosa, Karina, Chalaturnyk, Rick, Bonfils, Benjamin, Esterle, Joan and Chen, Zhongwei (2019). Testing impact load cell calculations of material fracture toughness and strength using 3D-printed sandstone. Geotechnical and Geological Engineering, 38 (2), 1065-1096. doi: 10.1007/s10706-019-01073-y
Fan, Chaojun, Elsworth, Derek, Li, Sheng, Chen, Zhongwei, Luo, Mingkun, Song, Yu and Zhang, Haohao (2019). Modelling and optimization of enhanced coalbed methane recovery using CO2/N2 mixtures. Fuel, 253, 1114-1129. doi: 10.1016/j.fuel.2019.04.158
Song, Weiqiang, Zhang, Junming, Wang, Chunguang, Chen, Shaojie and Chen, Zhongwei (2019). Flow field characters near fracture entrance in supercritical carbon dioxide sand fracturing. Greenhouse Gases: Science and Technology, 9 (5) ghg.1915, 999-1009. doi: 10.1002/ghg.1915
Zhao, Yixin, Wu, Yang, Han, Songbai, Xue, Shanbin, Fan, Guowei, Chen, Zhongwei and El Abd, A. (2019). Water sorptivity of unsaturated fractured sandstone: fractal modeling and neutron radiography experiment. Advances in Water Resources, 130, 172-183. doi: 10.1016/j.advwatres.2019.06.006
Zheng, Chunshan, Jiang, Bingyou, Xue, Sheng, Chen, Zhongwei and Li, He (2019). Coalbed methane emissions and drainage methods in underground mining for mining safety and environmental benefits: A review. Process Safety and Environmental Protection, 127, 103-124. doi: 10.1016/j.psep.2019.05.010
Masoudian, Mohsen S., Leonardi, Christopher, Chen, Zhongwei and Underschultz, Jim (2019). Towards the development of a baseline for surface movement in the Surat Cumulative Management Area. The APPEA Journal, 59 (1), 95-114. doi: 10.1071/aj18181
Wang, Linsen, Chen, Zhongwei, Wang, Chunguang, Elsworth, Derek and Liu, Weitao (2019). Reassessment of coal permeability evolution using steady-state flow methods: the role of flow regime transition. International Journal of Coal Geology, 211 103210, 103210. doi: 10.1016/j.coal.2019.103210
Gong, Hongkui, Kizil, Mehmet S., Chen, Zhongwei, Amanzadeh, Moe, Yang, Ben and Aminossadati, Saiied M. (2019). Advances in fibre optic based geotechnical monitoring systems for underground excavations. International Journal of Mining Science and Technology, 29 (2), 229-238. doi: 10.1016/j.ijmst.2018.06.007
Raza, Syed Shabbar, Ge, Lei, Rufford, Thomas E., Chen, Zhongwei and Rudolph, Victor (2019). Anisotropic coal permeability estimation by determining cleat compressibility using mercury intrusion porosimetry and stress–strain measurements. International Journal of Coal Geology, 205, 75-86. doi: 10.1016/j.coal.2019.02.011
Li, Junmeng, Huang, Yanli, Chen, Zhongwei, Zhang, Jixiong, Jiang, Haiqiang and Zhang, Yuanchao (2019). Characterizations of macroscopic deformation and particle crushing of crushed gangue particle material under cyclic loading: in solid backfilling coal mining. Powder Technology, 343, 159-169. doi: 10.1016/j.powtec.2018.11.049
Zhong, Ruizhi, Johnson Jr, Raymond, Chen, Zhongwei and Chand, Nathaniel (2019). Coal identification using neural networks with real-time coalbed methane drilling data. The APPEA Journal, 59 (1), 319-327. doi: 10.1071/aj18091
Zhu, Yiran, Chen, Zhongwei, Xing, Huilin and Rudolph, Victor (2019). Impact of capillary trapping on CSG recovery: an overlooked phenomenon. The APPEA Journal, 59 (1), 343-356. doi: 10.1071/aj18228
Ma, Dan, Chen, Zhongwei, Peng, Yan and Masoudian, Mohsen S. (2018). Computational and experimental investigations of fluid flow in rock materials. Advances in Civil Engineering, 2018 2140479, 1-3. doi: 10.1155/2018/2140479
Zhou, Zhi-yong, Kizil, Mehmet, Chen, Zhong-wei and Chen, Jian-hong (2018). A new approach for selecting best development face ventilation mode based on G1-coefficient of variation method. Journal of Central South University, 25 (10), 2462-2471. doi: 10.1007/s11771-018-3929-y
Wei, Jianping, Cui, Pengfei, Chen, Zhongwei, Yao, Banghua, Zheng, Chunshan, Jia, Bing and Wang, Xiaochuan (2018). Experimental study on radon exhalation characteristics of coal samples under varying gas pressures. Results in Physics, 10, 1006-1014. doi: 10.1016/j.rinp.2018.08.019
Zhao, Yixin , Xue, Shanbin , Han, Songbai , He, Linfeng and Chen, Zhongwei (2018). Characterization of unsaturated diffusivity of tight sandstones using neutron radiography. International Journal of Heat and Mass Transfer, 124, 693-705. doi: 10.1016/j.ijheatmasstransfer.2018.03.090
Huang, Jinxin, Xu, Guang, Hu, Guozhong, Kizil, Mehmet and Chen, Zhongwei (2018). A coupled electromagnetic irradiation, heat and mass transfer model for microwave heating and its numerical simulation on coal. Fuel Processing Technology, 177, 237-245. doi: 10.1016/j.fuproc.2018.04.034
Li, Junmeng, Huang, Yanli, Chen, Zhongwei, Li, Meng, Qiao, Ming and Kizil, Mehmet (2018). Particle-crushing characteristics and acoustic-emission patterns of crushing gangue backfilling material under cyclic loading. Minerals, 8 (6) 244, 244. doi: 10.3390/min8060244
Xia, Tongqiang , Dontsov, Egor , Chen, Zhongwei , Zhang, Fengshou , Wei, Mingyao and Kong, Xiangzhao (2018). Fluid flow in unconventional gas reservoirs. Geofluids, 2018 2178582, 1-2. doi: 10.1155/2018/2178582
Li, Junmeng, Huang, Yanli, Qiao, Ming, Chen, Zhongwei, Song, Tianqi, Kong, Guoqiang, Gao, Huadong and Guo, Lei (2018). Effects of water soaked height on the deformation and crushing characteristics of loose gangue backfill material in solid backfill coal mining. Processes, 6 (6) 64, 64. doi: 10.3390/pr6060064
Zheng, Chunshan, Lin, Baiquan, Kizil, Mehmet S., Aminossadati, Saiied M., Li, He and Chen, Zhongwei (2018). Analysis on the multi-phase flow characterization in cross-measure borehole during coal hydraulic slotting. International Journal of Mining Science and Technology, 28 (4), 701-705. doi: 10.1016/j.ijmst.2018.05.006
Jinxin, Huang, Guang, Xu, Yinping, Chen and Zhongwei, Chen (2018). Simulation of microwave’s heating effect on coal seam permeability enhancement. International Journal of Mining Science and Technology, 29 (5), 785-789. doi: 10.1016/j.ijmst.2018.04.017
Zheng, Chunshan , Kizil, Mehmet S. , Aminossadati, Saiied M. and Chen, Zhongwei (2018). Effects of geomechanical properties of interburden on the damage-based permeability variation in the underlying coal seam. Journal of Natural Gas Science and Engineering, 55, 42-51. doi: 10.1016/j.jngse.2018.04.017
Zhao, Yixin, Sun, Yingfeng, Liu, Shimin, Chen, Zhongwei and Yuan, Liang (2018). Pore structure characterization of coal by synchrotron radiation nano-CT. Fuel, 215, 102-110. doi: 10.1016/j.fuel.2017.11.014
Zheng, Chunshan, Kizil, Mehmet S., Chen, Zhongwei and Aminossadati, Saiied M. (2018). Role of multi-seam interaction on gas drainage engineering design for mining safety and environmental benefits: linking coal damage to permeability variation. Process Safety and Environmental Protection, 114, 310-322. doi: 10.1016/j.psep.2018.01.011
Yao, Banghua, Chen, Zhongwei, Wei, Jianping, Bai, Tianhang and Liu, Shumin (2018). Predicting erosion-induced water inrush of karst collapse pillars using inverse velocity theory. Geofluids, 2018 2090584, 1-18. doi: 10.1155/2018/2090584
Zhao, Yixin , Zhu, Guangpei , Dong, Yanhui , Noraei Danesh, Nima , Chen, Zhongwei and Zhang, Tong (2017). Comparison of low-field NMR and microfocus X-ray computed tomography in fractal characterization of pores in artificial cores. Fuel, 210, 217-226. doi: 10.1016/j.fuel.2017.08.068
Lin, P., Li, S. C., Xu, Z. H., Li, L. P., Huang, X., He, S. J., Chen, Z. W. and Wang, J. (2017). A spiral variable section capillary model for piping hydraulic gradient of soils causing water/mud inrush in tunnels. Geomechanics and Engineering, 13 (6), 947-961. doi: 10.12989/gae.2017.13.6.947
Bai, Tianhang, Chen, Zhongwei, Aminossadati, Saiied M., Rufford, Thomas E. and Li, Ling (2017). Experimental investigation on the impact of coal fines generation and migration on coal permeability. Journal of Petroleum Science and Engineering, 159, 257-266. doi: 10.1016/j.petrol.2017.09.035
Wang, Chunguang, Zhai, Peicheng, Chen, Zhongwei, Liu, Jishan, Wang, Linsen and Xie, Jun (2017). Experimental study of coal matrix-cleat interaction under constant volume boundary condition. International Journal of Coal Geology, 181, 124-132. doi: 10.1016/j.coal.2017.08.014
Zheng, Chunshan, Kizil, Mehmet S., Chen, Zhongwei and Aminossadati, Saiied M. (2017). Effects of coal properties on ventilation air leakage into methane gas drainage borehole: application of the orthogonal design. Journal of Natural Gas Science and Engineering, 45, 88-95. doi: 10.1016/j.jngse.2017.05.005
Zheng, Chunshan, Kizil, Mehmet, Chen, Zhongwei and Aminossadati, Saiied (2017). Effects of coal damage on permeability and gas drainage performance. International Journal of Mining Science and Technology, 27 (5), 783-786. doi: 10.1016/j.ijmst.2017.07.009
Lin, Baiquan, Li, He, Chen, Zhongwei, Zheng, Chunshan, Hong, Yidu and Wang, Zheng (2017). Sensitivity analysis on the microwave heating of coal: a coupled electromagnetic and heat transfer model. Applied Thermal Engineering, 126, 949-962. doi: 10.1016/j.applthermaleng.2017.08.012
Li, He, Lin, Baiquan, Chen, Zhongwei, Hong, Yidu and Zheng, Chunshan (2017). Evolution of coal petrophysical properties under microwave irradiation stimulation for different water saturation conditions. Energy and Fuels, 31 (9), 8852-8864. doi: 10.1021/acs.energyfuels.7b00553
Shi, Bobo, Su, Hetao, Li, Jinshi, Qi, Haining, Zhou, Fubao, Torero, José L. and Chen, Zhongwei (2017). Clean power generation from the intractable natural coalfield fires: turn harm into benefit. Scientific Reports, 7 (1) 5302, 5302.1-5302.5. doi: 10.1038/s41598-017-05622-4
Azadi, Mohsen, Aminossadati, Saiied M. and Chen, Zhongwei (2017). Development of an integrated reservoir-wellbore model to examine the hydrodynamic behaviour of perforated pipes. Journal of Petroleum Science and Engineering, 156, 269-281. doi: 10.1016/j.petrol.2017.05.027
Zhao, Yixin, Xue, Shanbin, Han, Songbai, Chen, Zhongwei, Liu, Shimin, Elsworth, Derek, He, Linfeng, Cai, Jinchao and Liu, Yuntao (2017). Effects of microstructure on water imbibition in sandstones using X-ray computed tomography and neutron radiography. Journal of Geophysical Research B: Solid Earth, 122 (7), 4963-4981. doi: 10.1002/2016JB013786
Oh, J. , Bahaaddini, M. , Sharifzadeh, M. and Chen, Z. (2017). Evaluation of air blast parameters in block cave mining using particle flow code. International Journal of Mining, Reclamation and Environment, 33 (2), 1-15. doi: 10.1080/17480930.2017.1342064
Bai, Tianhang, Chen, Zhongwei, Aminossadati, Saiied M., Li, Ling, Liu, Jishan and Lu, Hang (2017). Dimensional analysis and prediction of coal fines generation under two-phase flow conditions. Fuel, 194, 460-479. doi: 10.1016/j.fuel.2017.01.040
Danesh, Nima N., Chen, Zhongwei, Connell, Luke D., Kizil, Mehmet S., Pan, Zhejun and Aminossadati, Saiied M. (2017). Characterisation of creep in coal and its impact on permeability: An experimental study. International Journal of Coal Geology, 173, 200-211. doi: 10.1016/j.coal.2017.03.003
Peng, Yan, Liu, Jishan, Pan, Zhejun, Connell, Luke D., Chen, Zhongwei and Qu, Hongyan (2016). Impact of coal matrix strains on the evolution of permeability. Fuel, 189, 270-283. doi: 10.1016/j.fuel.2016.10.086
Azadi, Mohsen, Aminossadati, Saiied M. and Chen, Zhongwei (2016). Large-scale study of the effect of wellbore geometry on integrated reservoir-wellbore flow. Journal of Natural Gas Science and Engineering, 35 (A), 320-330. doi: 10.1016/j.jngse.2016.08.032
Zheng, Chunshan, Chen, Zhongwei, Kizil, Mehmet, Aminossadati, Saiied, Zou, Quanle and Gao, Panpan (2016). Characterisation of mechanics and flow fields around in-seam methane gas drainage borehole for preventing ventilation air leakage: a case study. International Journal of Coal Geology, 162, 123-138. doi: 10.1016/j.coal.2016.06.008
Danesh, Nima N., Chen, Zhongwei, Aminossadati, Saiied M., Kizil, Mehmet S., Pan, Zhejun and Connell, Luke D. (2016). Impact of creep on the evolution of coal permeability and gas drainage performance. Journal of Natural Gas Science and Engineering, 33, 469-482. doi: 10.1016/j.jngse.2016.05.033
Bai, Tianhang, Chen, Zhongwei, Aminossadati, Saiied M., Pan, Zhejun, Liu, Jishan and Li, Ling (2015). Characterization of coal fines generation: a micro-scale investigation. Journal of Natural Gas Science and Engineering, 27 (Part 2), 862-875. doi: 10.1016/j.jngse.2015.09.043
Hui, Yanchao, Chen, Zhongwei, Zhang, Jixiong and Ju, Feng (2013). Coal Mine Workface Geological Hazard Mapping and Its Optimum Support Design: A Case Study. Disaster Advances, 6 (5 (Special Issue)), 66-84.
Huang, Yanli, Zhang, Jixiong, Li, Meng, Jiang, Haiqiang and Chen, Zhongwei (2013). Waste Substitution Extraction of Coal Strip Mining Pillars. Research Journal of Chemistry and Environment, 17 (Special 1), 96-103.
Chen, Zhongwei, Liu, Jishan, Elsworth, Derek, Pan, Zhejun and Wang, Shugang (2013). Roles of coal heterogeneity on evolution of coal permeability under unconstrained boundary conditions. Journal of Natural Gas Science and Engineering, 15, 38-52. doi: 10.1016/j.jngse.2013.09.002
Qu, Hongyan, Liu, Jishan, Chen, Zhongwei, Wang, Jianguo, Pan, Zhejun, Connell, Luke and Elsworth, Derek (2012). Complex evolution of coal permeability during CO2 injection under variable temperatures. International Journal of Greenhouse Gas Control, 9, 281-293. doi: 10.1016/j.ijggc.2012.04.003
Zhongwei Chen, Liu, Jishan, Pan, Zhejun, Connell, Luke D. and Elsworth, Derek (2012). Effect of the effective stress coefficient and sorption-induced strain on the evolution of coal Permeability: Model development and analysis.. International Journal of Greenhouse Gas Control, 8, 101-110. doi: 10.1016/j.ijggc.2012.01.015
Wang, J. G., Kabir, Akim, Liu, Jishan and Chen, Zhongwei (2012). Effects of non-Darcy flow on the performance of coal seam gas wells. International Journal of Coal Geology, 93, 62-74. doi: 10.1016/j.coal.2012.01.013
Zheng, Guiqiang, Pan, Zhejun, Chen, Zhongwei, Tang, Shuheng, Connell, Luke D., Zhang, Songhang and Wang, Bo (2012). Laboratory study of gas permeability and cleat compressibility for CBM/ECBM in Chinese coals. Energy Exploration and Exploitation, 30 (3), 451-476. doi: 10.1260/0144-5987.30.3.451
Liu, Jishan, Chen, Zhongwei, Elsworth, Derek, Miao, Xiexing and Mao, Xianbiao (2011). Evolution of coal permeability from stress-controlled to displacement-controlled swelling conditions. Fuel, 90 (10), 2987-2997. doi: 10.1016/j.fuel.2011.04.032
Liu, Jishan, Wang, Jianguo, Chen, Zhongwei, Wang, Shugang, Elsworth, Derek and Jiang, Yaodong (2011). Impact of transition from local swelling to macro swelling on the evolution of coal permeability. International Journal of Coal Geology, 88 (1), 31-40. doi: 10.1016/j.coal.2011.07.008
Chen, Zhongwei, Pan, Zhejun, Liu, Jishan, Connell, Luke D. and Elsworth, Derek (2011). Effect of the effective stress coefficient and sorption-induced strain on the evolution of coal permeability: experimental observations. International Journal of Greenhouse Gas Control, 5 (5), 1284-1293. doi: 10.1016/j.ijggc.2011.07.005
Liu, Jishan, Chen, Zhongwei, Elsworth, Derek, Qu, Hongyan and Chen, Dong (2011). Interactions of multiple processes during CBM extraction: A critical review. International Journal of Coal Geology, 87 (3-4), 175-189. doi: 10.1016/j.coal.2011.06.004
Wu, Yu, Liu, Jishan, Chen, Zhongwei, Elsworth, Derek and Pone, Denis (2011). A dual poroelastic model for CO2-enhanced coalbed methane recovery. International Journal of Coal Geology, 86 (2-3), 177-189. doi: 10.1016/j.coal.2011.01.004
Liu, Jishan, Chen, Zhongwei, Elsworth, Derek, Miao, Xiexing and Mao, Xianbiao (2010). Evaluation of stress-controlled coal swelling processes. International Journal of Coal Geology, 83 (4), 446-455. doi: 10.1016/j.coal.2010.06.005
Liu, Jishan, Chen, Zhongwei, Elsworth, Derek, Miao, Xiexing and Mao, Xianbiao (2010). Linking gas-sorption induced changes in coal permeability to directional strains through a modulus reduction ratio. International Journal of Coal Geology, 83 (1), 21-30. doi: 10.1016/j.coal.2010.04.006
Wu, Yu, Liu, Jishan, Elsworth, Derek, Chen, Zhongwei, Connell, Luke and Pan, Zhejun (2010). Dual poroelastic response of a coal seam to CO2 injection. International Journal of Greenhouse Gas Control, 4 (4), 668-678. doi: 10.1016/j.ijggc.2010.02.004
Chen, Zhongwei, Liu, Jishan, Elsworth, Derek, Connell, Luke D. and Pan, Zhejun (2010). Impact of CO2 injection and differential deformation on CO2 injectivity under in-situ stress conditions. International Journal of Coal Geology, 81 (2), 97-108. doi: 10.1016/j.coal.2009.11.009
Li, Qiang, Chen, Zhong-Wei and Mao, Xian-Biao (2009). Application research of support relief technique in open-off cut. Wuhan Ligong Daxue Xuebao/Journal of Wuhan University of Technology, 31 (10)
Zhou, Lai, Feng, Qi-Yan, Chen, Zhong-Wei, Li, Xiang-Dong and Liu, Bo (2009). Effects of coal swelling on modeling of CO2 sorption on the coal and correction approaches. Meitan Xuebao/Journal of the China Coal Society, 34 (5), 673-677.
Zhang, Jixiong, Miao, Xiexing, Mao, Xianbiao and Chen, Zhongwei (2007). Research on waste substitution extraction of strip extraction coal-pillar mining. Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering, 26 (SUPPL. 1), 2687-2693.
Conference Papers
Serati, M., Mottaghi, R., Williams, D. J. and Chen, Z. (2023). Biaxial Loading of Brazilian Disc Samples. Rock and Fracture Mechanics in Rock Engineering and Mining, Helsinki, Finland, 11-15 September 2022. Bristol, United Kingdom: Institute of Physics. doi: 10.1088/1755-1315/1124/1/012017
Saber, Erfan, Qu, Qingdong, Aminossadati, Saiied M. and Chen, Zhongwei (2022). Horizontal coal seam gas well orientation optimization: the impact of stress regime. SPE Asia Pacific Oil & Gas Conference and Exhibition, Adelaide, SA, Australia, 17-19 October 2022. Houston, TX, United States: The Society of Petroleum Engineers. doi: 10.2118/210647-ms
Li, Jimmy Xuekai, Tsang, Matt, Giese, Stephen, Zhong, Ruizhi, Esterle, Joan, Pirona, Claire, Rajabi, Mojtaba and Chen, Zhongwei (2022). UCS prediction by group-based machine learning method. Resource Operators Conference, Virtual, 10-11 February 2022. Wollongong, NSW, Australia: University of Wollongong and University of Southern Queensland.
Mondal, Sanjib, Qian, Sijin, Nehring, Micah and Chen, Zhongwei (2021). Determining the correlation between Vicker's microhardness and Young's modulus of coal. SPE/AAPG/SEG Asia Pacific Unconventional Resources Technology Conference, Virtual, 16–18 November, 2021. Tulsa, OK, United States: Unconventional Resources Technology Conference. doi: 10.15530/ap-urtec-2021-208274
Leonardi, C. R., Zhong, R., Mitchell, T. R., Chen, Z., Johnson, R. L., O'Hagan, D. and Flottmann, T. (2021). Analytical and numerical assessment of the influence of bulk coal strength on drilling operations in unconventional coal seam gas wells. 55th US Rock Mechanics/Geomechanics Symposium, Houston, TX USA, 20-23 June 2021. Alexandria, VA USA: American Rock Mechanics Association.
Purser, Robert , El-Amin Mohmoud, Mutaz, Serati, Mehdi and Chen, Zhongwei (2021). Determining rock elastic parameters using a new true-triaxial-based technique. ROC2021, Brisbane, Australia, 11–12 February 2021. Wollongong, Australia: University of Wollongong/University of Southern Queensland.
Zhong, Ruizhi, Tsang, Matt, Makusha, Gift, Yang, Ben and Chen, Zhongwei (2021). Improving estimation of rock mechanical properties using machine learning. Resource Operators Conference, Virtual, 11-12 February 2021. Wollongong, Australia: University of Wollongong/University of Southern Queensland.
Morton, Claire, Chen, Zhongwei and Kizil, Mehmet S. (2021). Thin spray-on liners: a historical overview and their future potential as support in underground coal mines. 2021 Resource Operators Conference, Toowoomba, QLD Australia, Feb 2021. Wollongong, NSW Australia: Wollongong, NSW Australia.
Huang, Yixiao, Shi, Zhang, Flottmann, Thomas, Kuznetsov, Dan, Rudolph, Victor, Leonardi, Christopher and Chen, Zhongwei (2021). Experimental Study of Coal Directional Sorption-Induced Strain Under Different Temperatures. SPE/AAPG/SEG Asia Pacific Unconventional Resources Technology Conference, Online, 16–18 November 2021. Tulsa, OK United States: Unconventional Resources Technology Conference. doi: 10.15530/ap-urtec-2021-208345
Zhong, Ruizhi, Johnson Jr, Ray L. and Chen, Zhongwei (2021). Using machine learning for geosteering during in-seam drilling. SPE/AAPG/SEG Asia Pacific Unconventional Resources Technology Conference, Virtual, 16–18 November, 2021. Tulsa, OK, United States: Unconventional Resources Technology Conference. doi: 10.15530/ap-urtec-2021-208298
Zhu, Yiran, Shi, Zhang, Xing, Huilin, Gao, Shuai and Chen, Zhongwei (2021). Quantifying capillary trapping on ultimate coal seam gas recovery: a laboratory study. SPE/AAPG/SEG Asia Pacific Unconventional Resources Technology Conference, Virtual, 16-18 November 2021. Tulsa, OK, United States: Unconventional Resources Technology Conference. doi: 10.15530/ap-urtec-2021-208336
Shi, Zhang, Huang, Yixiao, Zhu, Yiran, Gan, Yixiang and Chen, Zhongwei (2021). Stress-dependent two-phase flow in coal cleats. SPE/AAPG/SEG Asia Pacific Unconventional Resources Technology Conference,, Virtual, 16-18 November 2021. Tulsa, OK, United States: Unconventional Resources Technology Conference. doi: 10.15530/ap-urtec-2021-208331
Salehi, Cyrus, Zhong, Ruizhi, Ganpule, Sameer, Dewar, Steven, Johnson, Raymond and Chen, Zhongwei (2020). Estimating Coal Permeability Using Machine Learning Methods. SPE Asia Pacific Oil & Gas Conference and Exhibition, Online, 17-19 November 2020. Richardson, TX United States: Society of Petroleum Engineers. doi: 10.2118/202271-ms
Chen, Zhongwei, Serati, Mehdi and Mohmoud, Mutaz El-Amin (2020). Determining coal directional mechanical properties using true triaxial testing facility. Coal Operators’ Conference 2020, University of Wollongong, 12-14 February 2020. Wollongong, NSW Australia: University of Wollongong.
Raza, Syed Shabbar, Rudolph, Victor, Rufford, Tom and Chen, Zhongwei (2019). A stochastic anisotropic coal permeability model using mercury intrusion porosimetry, MIP and stress-strain measurements. SPE/AAPG/SEG Asia Pacific Unconventional Resources Technology Conference, Brisbane, QLD, Australia, 18-19 November 2019. Tulsa, OK, United States: Unconventional Resources Technology Conference. doi: 10.15530/ap-urtec-2019-198260
Chawarwan, Khan, Dan, Kuznetsov, Thomas Rufford, Victor, Rudolph and Zhongwei, Chen (2019). Optimisation of dewatering rates to maximise coal seam gas production. SPE/AAPG/SEG Asia Pacific Unconventional Resources Technology Conference, Brisbane, Australia, 18-19 November 2019. Kuala Lumpur, Malaysia: Unconventional Resources Technology Conference. doi: 10.15530/AP-URTEC-2019-198210
Zhong, Ruizhi, Johnson Jr., Raymond L. and Chen, Zhongwei (2019). Using machine learning methods to identify coals from drilling and logging-while-drilling LWD data. SPE/AAPG/SEG Asia Pacific Unconventional Resources Technology Conference, Brisbane, QLD, Australia, 18-19 November 2019. Tulsa, OK, United States: Unconventional Resources Technology Conference. doi: 10.15530/ap-urtec-2019-198288
Zhiyong, Zhou, Kizil, Mehmet, Zhongwei, Chen and Jianhong, Chen (2018). Selecting the best development face ventilation scheme using G1-coefficient of variation method. 11th International Mine Ventilation Congress, Xi’an China, September 14-20, 2018 . Singapore: Springer Singapore. doi: 10.1007/978-981-13-1420-9_9
Yang, Ben, Aminossadati, Saiied M., Chen, Zhongwei, Kizil, Mehmet S., Gong, Hongkui and Kennedy, Gareth (2018). Experimental investigation of slope tension crack monitoring using fibre optic sensing. XIV Congress International de Energia y Resources Minerales, Seville, Spain, 10-13 April 2018. Seville, Spain: Bco Congresos.
Yang, Ben, Aminossadati, Saiied M., Zhongwei, Chen and Kizil, Mehmet S. (2017). Fibre optic sensing based slope tension crack monitoring system for surface mines. 2nd International Conference on Fibre-Optic and Photonic Sensors for Industrial and Safety Applications, Brisbane, QLD, Australia, 8 - 10 January 2017. Piscataway, NJ, United States: Institute of Electrical and Electronics Engineers. doi: DOI 10.1109/OFSIS.2017.21
Bai, Tianhang, Chen, Zhongwei, Aminossadati, Saiied M. and Rufford, Thomas (2017). Experimental study of impact of dewatering induced coal fines on coal permeability. 6th Biot Conference on Poromechanics, Paris, France, 9-13 July 2017. Reston, VA, United States: American Society of Civil Engineers. doi: 10.1061/9780784480779.141
Gong, Hongkui, Kizil, Mehmet S., Chen, Zhongwei and Aminossadati, Saiied M. (2017). Validation of bare FBG sensors in monitoring compressive rock mass deformation. 2nd International Conference of Fibre-optic and Photonic Sensors for Industrial and Safety Applications, Brisbane, QLD, Australia, 8 - 10 January 2017. Piscataway, NJ, United States: Institute for Electrical and Electronics Engineers. doi: DOI 10.1109/OFSIS.2017.20
Tian, Chengyu, Pan, Zhejun, Chen, Zhongwei, Connell, Luke D. and Zhang, Xi (2016). Modelling of supercritical gas hydraulic fracturing: Using the PKN model as an example. International Conference on Geomechanics, Geo-energy and Geo-resources, Monash University, Melbourne, Australia, 28-29 September 2016. IC3G.
Chunshan Zheng, Kizil, Mehmet S., Zhongwei Chen and Aminossadati, Saiied M. (2016). Effects of coal damage on permeability and gas drainage performance. The 9th International Symposium on Green Mining, University of Wollongong, Wollongong, NSW, Australia, 27-30 Nov 2016.
Azadi, Mohsen, Aminossadati, Saiied Mostafa and Chen, Zhongwei (2016). Numerical simulation of integrated reservoir-borehole flow for pre-mining drainage. 2016 Coal Operators' Conference, Wollongong, Australia, 10-12 Feb 2016. Wollongong, Australia: The University of Wollongong Printery.
Bai, Tianhang, Chen, Zhongwei, Aminossadati, Saiied M., Danesh, Nima, Pan, Zhejun, Liu, Jishan and Li, Ling (2016). Impact of flow regimes on coal fines generation during coal seam gas production process. 50th US Rock Mechanics / Geomechanics Symposium, Houston, TX, United States, 26-29 June 2016. Alexandria, VA, United States: American Rock Mechanics Association.
Danesh, Nima Noraei, Chen, Zhongwei, Pan, Zhejun, Connell, Luke, Aminossadati, Saiied, Bai, Tianhang and Kizil, Mehmet (2016). Experimental study of impact of creep on coal permeability. 50th US Rock Mechanics / Geomechanics Symposium, Houston, TX, United States, 26-29 June 2016. Alexandria, VA, United States: American Rock Mechanics Association.
Danesh, N. N., Chen, Z., Aminossadati, S. M., Kizil, M., Pan, Z. and Connell, L. D. (2015). Creep, a neglected phenomenon in coal permeability evolution and coalbed methane production. SPE Asia Pacific Unconventional Resources Conference and Exhibition, Brisbane, QLD, Australia, 9-11 November 2015. Society of Petroleum Engineers. doi: 10.2118/176980-MS
Bai, Tianhang, Chen, Zhongwei, Aminossadati, Saiied M., Pan, Zhejun and Liu, Jishan (2015). Prediction of mobility and settlement position of coal fines during dewatering. China Shale Gas 2015, Wuhan, China, 6-8 September 2015.
Chen, Zhongwei, Bai, Tianhang and Aminossadati, Saiied M. (2015). Characterization of coal fines generation: importance of flow condition. 7th International Conference on Mining Science and Technology, Xuzhou, China, April 26-29, 2015.
Peng, Yan, Liu, Jishan, Pan, Zhejun, Connell, Luke and Chen, Zhongwei (2014). A fully coupled model for caprock sealing efficiency. 48th US Rock Mechanics/Geomechanics Symposium, Minneapolis, Minn, United States, 1-4 June 2014. Alexandria, VA, United States: American Rock Mechanics Association.
Chen, Zhongwei, Liu, Jishan, Kabir, Akim, Wang, Jianguo and Pan, Zhejun (2013). Impact of various parameters on the production of coalbed methane. SPE Canadian Unconventional Resources Conference, Calgary Canada, Oct 30-Nov 01, 2012. Richardson, TX, United States: Society of Petroleum Engineers. doi: 10.2118/162722-PA
Chen, Zhongwei, Liu, J., Wang, D. E. S and Wu, Y. (2013). Evolution of coal permeability under unconstrained swelling: contribution of matrix-fracture interaction. ARMA 2013: 47th US Rock Mechanics / Geomechanics Symposium 2013, San Francisco, CA, USA, 23-26 June, 2013. New York, NY, U.S.A.: Curran Associates.
Zhou, Lai, Feng, Qiyan, Chen, Zhongwei and Liu, Jishan (2011). Sensitivity simulation and analysis of CO2 injection for enhanced coalbed methane recovery. 2nd International Conference on Multimedia Technology, ICMT 2011, Hangzhou, China, 26-28 July 2011. Piscataway, NJ United States: Institute of Electrical and Electronics Engineers. doi: 10.1109/ICMT.2011.6002796
Zhou, Lai, Feng, Qiyan, Chen, Zhongwei and Liu, Jishan (2011). Modeling and upscaling of binary gas coal interactions in CO2 enhanced coalbed methane recovery. 2011 International Conference on Environmental Science and Engineering (ICESE 2011), Bali, Indonesia, 1 - 3 April 2011. Amsterdam, Netherlands: Elsevier. doi: 10.1016/j.proenv.2012.01.368
Chen, Zhongwei , Liu, Jishan , Pan, Zhejun , Connell, Luke and Elsworth, Derek (2010). Relations between coal permeability and directional strains and their application to San Juan Basin. 44th U.S. Rock Mechanics Symposium and 5th U.S.-Canada Rock Mechanics Symposium, Salt Lake City, UT, United States, 27-30 June 2010.
Liu, Jishan, Chen, Zhongwei and Qu, Hongyan (2010). Multiphysics of coal-gas interactions: the scientific foundation for CBM extraction. 2010 SPE Asia Pacific Oil and Gas Conference and Exhibition, Brisbane, QLD, Australia, 18 - 20 October 2010. Richardson, TX, United States: Society of Petroleum Engineers.
Wang, Jian-guo , Liu, Jianxin , Liu, Jishan and Chen, Zhongwei (2010). Impact of rock microstructures on the supercritical CO2 enhanced gas recovery. International Oil and Gas Conference and Exhibition in China, Beijing, China, 8-10 June 2010. Society of Petroleum Engineers. doi: 10.2118/131759-ms
Wu, Yu, Liu, Jishan, Chen, Zhongwei, Elsworth, Derek, Connell, Luke and Pan, Zhejun (2009). Dual poroelastic response of coal seam to CO2 injection. 43rd U.S. Rock Mechanics Symposium and 4th U.S.-Canada Rock Mechanics Symposium, , , June 28, 2009-July 1, 2009.
Wu, Yu , Liu, Jishan , Chen, Zhongwei , Connell, Luke and Pan, Zhejun (2009). Dual poroelastic response of coal seam to CO2 injection. 43rd U.S. Rock Mechanics Symposium & 4th U.S. - Canada Rock Mechanics Symposium, Asheville, NC, United States, 28 June-1 July 2009.
Chen, Zhongwei, Liu, Jishan, Elsworth, Derek, Connell, Luke and Pan, Zhejun (2009). Investigation of CO2 injection induced coal-gas interactions. 43rd U.S. Rock Mechanics Symposium and 4th U.S.-Canada Rock Mechanics Symposium, Asheville, NC, United States, 28 June - 1 July 2009. Alexandria, VA, United States: American Rock Mechanics Association.
Chen, Zhongwei, Liu, Jishan, Connell, Luke, Pan, Zhejun and Lai, Zhou (2008). Impact of effective stress and CH4-CO2 counter-diffusion on CO2 enhanced coalbed methane recovery. 2008 SPE Asia Pacific Oil and Gas Conference and Exhibition, Perth, WA, Australia, 20-22 October 2008.