Abstract
Broken-soft coal seam has the characteristics of fragmented structure, low Protodyakonov coefficient and permeability, which are the main factors affecting the development effect of coalbed gas. Therefore, taking the broken-soft coal seam in Luling Field of Huaibei mining area as an example, this paper puts forward the new idea of exploiting coalbed methane by virtual reservoir horizontal wells. On the basis of studying of virtual reservoir establishing, the position of horizontal well in virtual reservoir is optimized. The results show that the coal seam roof is the preferred target layer for the virtual reservoir; fractures can be formed in the coal seam by layer-penetrating fracturing of the horizontal wells, and the concept of developing coalbed methane in broken-soft coal seam by virtual reservoir horizontal wells is feasible. The position of the horizontal well in the virtual reservoir and the fracturing displacement are the key factors affecting the effect of layer-penetrating fracturing, and the horizontal well in the roof 1.5 m away from the coal seam top and fracturing displacement of 10 m3/min can acquire good effect of layer-penetrating fracturing. Field test proves that the virtual reservoir horizontal well works well in developing coalbed methane in broken-soft coal seam, providing a new approach for the high-efficient development of coalbed methane in this kind of coal seam.
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References
Liu Y, Lou J. Study on reservoir characteristics and development technology of coalbed methane in China. Nat Gas Ind. 2004;24(1):68–71.
Ma G, Gong C. Probing into gas drainage technology by virtual reservoir. Saf Coal Mines. 2009;40(5):94–5.
Zhao X, Yang Y, Sun F, et al. Enrichment mechanism and exploration and development technologies of high rank coalbed methane in south Qinshui Basin, Shanxi Province. Pet Explor Dev. 2016;43(2):303–9.
Tang S, Zhu B, Yan Z. Effect of crustal stress on hydraulic fracture in coalbed methane wells. J China Coal Soc. 2011;36(1):65–9.
Shan X, Zhang S, Li A, et al. Analyzing the fracture extend law of hydraulic fracturing in coalbed gas wells. Nat Gas Ind. 2005;25(1):130–2.
Yang J, Wang Y, Li A, et al. Experimental study on propagation mechanism of complex hydraulic fracture in coal-bed. J China Coal Soc. 2012;37(1):73–7.
Zhao J, Chen X, Li Y, et al. Numerical simulation of multi-stage fracturing and optimization of perforation in a horizontal well. Pet Explor Dev. 2017;44(1):117–24.
Lian Z, Zhang J, Wu H, et al. A simulation study on hydraulic fracturing propagation with a solid-fluid coupling model. Rock Soil Mech. 2008;29(11):3021–7.
Zhao X, Jiang B, Xu Q, et al. Well pattern design and deployment for coalbed methane development. Pet Explor Dev. 2016;43(1):84–90.
Zhang X, Tong D, Hu A. Numerical simulation of coalbed methane pattern exploitation in Qinshui Basin. Eng Mech. 2008;12(12):218–22.
Xu Y, Zhu Y, Zhang P. Application of CBM horizontal well development technology in the roof strata close to broken-soft coal seams. Nat Gas Ind. 2018;38(9):70–5.
Mao Z. Research on faster drilling technology of coal-bed methane cluster wells. Explor Eng (Rock Soil Drill Tunn). 2012;39(2):12–4.
Qiao L, Shen R, Huang H, et al. Drilling technology of multi- branch horizontal well. Acta Pet Sin. 2007;28(3):112–5.
Chen Z, Deng J, Zhu H, et al. Research on initiation of oriented perforation fracturing and perforation optimization design method. Rock Soil Mech. 2013;34(8):2309–16.
Ren F, Zhang S, Li X, et al. Optimization design of fracture parameters in coalbed methane (CBM) horizontal well staged fracturing. Nat Gas Oil. 2014;32(1):58–62.
Qin Y, Li Y, Bai J, et al. Technologies in the CBM production of wells in the southern Qinshui basin with high-rank coal beds. Nat Gas Ind. 2011;31(11):22–5.
Acknowledgements
This technology is supported by the National Science and Technology Major Project (2016ZX05045002-004) and National Natural Science Foundation of China (51874349). I would like to express my sincere thanks to this project organization. At the same time, I would like to express my gratitude to all those who helped me during the writing of this thesis. Firstly, I would also like to thank all members of the project team who have given me generous support and helpful advice during the past years. Secondly, my thanks would also go to Huaibei Mining Group that provided the data of field trial for this thesis.
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Xu, Y. (2020). Developing Coalbed Methane in Broken-Soft Coal Seam by Virtual Reservoir Horizontal Wells: A Case Study of Luling Field in Huaibei Mining Area, East China. In: Lin, J. (eds) Proceedings of the International Field Exploration and Development Conference 2018. IFEDC 2018. Springer Series in Geomechanics and Geoengineering. Springer, Singapore. https://doi.org/10.1007/978-981-13-7127-1_38
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DOI: https://doi.org/10.1007/978-981-13-7127-1_38
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