Coalbed methane recovery from multilateral horizontal wells in Southern Qinshui Basin

Shenggui Liu, Songlei Tang, Shunde Yin

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Since 2006, more than 80 multilateral horizontal wells have been drilled in Panzhuang block, Southern Qinshui Basin. In this paper, 6 typical wells in a region are selected as an example. The thickness of coal, gas content, reservoir pressure, permeability, burial depth, and reservoir pressure conditions are analyzed. The practice shows that production by multilateral horizontal well declines from 43,111 m3 /day per well in the 2nd year to 25,126 m3 /day per well in the 4th year. The numerical simulation result shows that the lateral interference forms in Well QNP05 after two years of gas production, and the gas content is reduced to less than 8 m3 /t within the controlled region after six years. The area of gas content was less than 8 m3 /t after eight years of gas production is about 3.2 km2 , which is about 76% of the controlled area of the six multilateral horizontal wells. The results indicate that multilateral horizontal wells contribute to high production rates at potentially profitable levels and can also serve as an effective tool for a high-rank CBM field drainage.

Cited as: Liu, S., Tang, S., Yin, S. Coalbed methane recovery from multilateral horizontal wells in Southern Qinshui Basin. Advances in Geo-Energy Research, 2018, 2(1): 34-42, doi: 10.26804/ager.2018.01.03


Coalbed methane, multilateral horizontal well, methane emissions, gas recovery, Southern Qinshui Basin

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Cai, Y.D., Liu, D.M., Yao, Y.B., et al. Geological controls on prediction of coalbed methane of No. 3 coal seam in Southern Qinshui Basin, North China. Int. J. Coal Geol. 2011, 88(2-3): 101-112.

Campoli, A.A., Trevits, M., Molinda, G.M. Coal and gas outbursts: Prediction and prevention. Coal Min 1985, 22(12): 42-44.

Diamond, W.P., Oyler, D.C., Fields, H.H. Report of In-vestigations 8277: Directionally controlled drilling to horizontally intercept selected strata. Pa. US Bureau of Mines, Upper Freeport Coalbed, Green County, pp. 1-20.

Flores, R.M. Coalbed methane: From hazard to resource. Int. J. Coal Geol. 1998, 35(1-4): 3-26.

Fu, X.H., Qin, Y., Li, G. An analysis on the principal control factor of coal reservoir permeability in Central and Southern Qinshui Basin. Coal Geology & Exploration 2001, 7(1): 45-52. (in Chinese)

Gentzis, T., Deisman, N., Chalaturnyk, R.J. A method to predict geomechanical properties and model well stability in horizontal boreholes. Int. J. Coal Geol. 2009, 78(2): 149-160.

Jin, Y., Zhao, Y. Disscusion of geological factor on gas content of coal seam in Qinshui Basin. West-China Exploration Engineering 2010, 12: 55-58. (in Chinese)

Liu, S.G. Study on the coal-bed gas reservoir forming conditions and production enhancing mechanism of multiple laterals horizontal well in Qinshui Basin. China University of Mining and Technology (Beijing), 2006, 89: 57-68. (in Chinese)

Liu, S.G., Hao, N., Li, H.F. Proceedings of the 20th Interna-tional Symposium on Mine Planning and Equipment Selection: Practice of coalbed methane drainage by drilling multilateral horizontal well in coal mine. Almaty, pp. 1413-1428.

Lv, Y.M., Tang, D.Z., Xu, H., et al. Production characteristics and the key factors in high-rank coalbed methane fields: A case study on the Fanzhuang Block, Southern Qinshui Basin. Int. J. Coal Geol. 2012, 96: 93-108.

Palmer, I. Coalbed methane completions: A world view. Int. J. Coal Geol. 2010, 82(3-4): 184-195.

Qin, Y., Yuan, L., Cheng, P. Scenario prediction for the mid-term and long-term coalbed methane production scale of surface drilling wells in China. Acta Petrolei Sinica 2013, 34(3): 71-80. (in Chinese)

Robinson, J., Kadatz, B., Wong, S., et al. ECBM micro-pilot test in the anthracitic coal’s of the Qinshui basin, China: Field results and preliminary analysis. The 3rd International Workshop on the Prospective Roles of CO2 Sequestration in Coal Seam, 2004, pp. 33-44.

Spindler, G.R., Poundstone, W.N. Experimental work in the degasification of the Pittsburgh coal seam by horizontal and vertical drilling. Sco. Min. Eng. AIME 1960, 220: 37-46.

Steven, A., Kramer, D., Michael, K. A numerical study on optimization of multilateral horizontal wellbore patterns for coalbed methane production in Southern Shanxi Province, China. Int. J. Coal Geol. 2011, 86(4): 306-317.

Su, X.B., Lin, X., Liu, S., et al. Geology of coalbed methane reservoirs in the Southeast Qinshui Basin of China. Int. J. Coal Geol. 2005, 62(4): 197-210.

Tim, A.M. Coalbed methane: A review. Int J. Coal Geol. 2012, 101: 36-81.

Wang, H.T., Guo, J.J., Zhang, L.H. A semi-analytical model for multilateral horizontal wells in low-permeability naturally fractured reservoirs. J. Pet. Sci. Eng. 2017, 149: 564-578.

White, C.M., Smith, D.H., Jones, K.L., et al. Sequestration of carbon dioxide in coal with enhanced coalbed methane recovery-a review. Energy Fuels 2005, 19(3): 659-724.

Yao, H., Wang, X. Coalbed Methane Reservoir Characteristic in Soutern Qinshui Basin. Beijing, China Coal Industry Publishing House, 2009. (in Chinese)

Ye, J.P. Proceedings of the 2011 Chinese coalbed methane academic symposium: China coalbed methane industry development report. Xiamen, Fujian, pp. 3-9.


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