Abstract
At present, many coalbed methane wells expose the problem of large water production and low depressurization efficiency which seriously affects gas production. External water supply affects adequate depressurization of coal reservoirs, impeding the desorption and output of coalbed methane and significantly reduces the gas production of coalbed methane wells. In order to evaluate the external water recharge, this paper introduces the concept of conventional oil-gas water invasion and establishes a water invasion intensity calculation model for coalbed methane wells based on the calculation of average formation pressure and the principle of material balance using dewatering data. The model quantitatively evaluates the water invasion intensity of coalbed methane well and is verified by the water head elevation and gas production rate, which is also consistent with the development of faults and aquifer. Corresponding technical measures are taken to avoid the impact of water invasion, including selecting retention and weak water invasion area for productivity construction, using area depressurization well pattern and fracturing the intervals free from water invasion. After field application, the production of low-rank and low-gas-content coalbed methane wells has made a breakthrough. The establishment of this model provides a basis for the productivity construction, well pattern design and fracturing layer selection of coalbed methane wells and has a good application prospect and promotion significance.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Aihua, L., et al.: Water invasion identification and water production mode in gas well in Puguang gas field. Spec. Oil Gas 22(3), 125–127 (2015)
Wei, S., et al.: Material balance method for the fractured water flooding gas reservoir in case of considering the water invasion strength. PGRE 16(3), 85–87 (2009)
Yang, Y., et al.: Solution and typical curves of seepage model of water-bearing coal seam with leakage recharge. Coal Geol. Explor. 22(3), 95–99 (2015)
Zhang Shuangbin, S., Xianbo, G.H.: Identifying method of leakage recharge in CBM wells [J]. Coal Geol. Explor. 41(5), 30–32 (2013)
Xinzheng, Z., et al.: A new method for water invasion performance prediction in the early stage of fractured and water-carrying gas reservoir development [J]. J. Southwest Petrol. Univ. 29(5), 82–85 (2007)
Tan, X., et al.: Material balance method and classification of non-uniform water invasion mode for gas reservoirs with water considering the effect of water sealed gas [J]. Nat. Gas Ind. (in Chinese), 41(3), 97–103 (2021)
Yuanjin, P., et al.: A new model of material balance for the fractured gas reservoirs with aquifers [J]. Nat. Gas. Ind. 27(2), 81–83 (2007)
Xiaodong, W., et al.: Productivity prediction of coal-bed gas wells [J]. Nat. Gas. Ind. 24(8), 82–84 (2004)
Okuszko, K.E., Gault, B.W., Mattar, L.: Production decline performance of CBM wells [J]. J. Can. Petrol. Technol. 47(7), 1–16 (2008)
Aminian, K., et al.: Type curves for coalbed methane production prediction[C]. In: Society of Petroleum Engineers. SPE Eastern Regional Meeting, Charleston, West Virginia, SPE-91482-MS (2004)
Wang, X., Zhao, Y., Wu, T.: Analysis of typical production mechanism and characteristics of coalbed methane wells for high rank coal in south Qinshui basin [J]. Coal Geol. Explor. 37(5), 5–9 (2009)
Qixin, W.: Research on Storage and Transportation Law and Resource Prediction of Coalbed Methane in Fuxin Basin [D], pp. 69–71. Liaoning Technical University, Fuxin (2005)
Yong, Q., Yong, Z.: Evaluation and Production Technology of Methane Reservoir in Coal Seam [M], pp. 5–9. China University of Mining and Technology Press, Xuzhou (1996)
Weidong, Z., Qingchun, M., Wei, W.: Prospect of technology for exploration and development of CBM [J]. China Coalbed Methane 6(5), 11–13 (2009)
Chuanliang, L.: Principles of Reservoir Engineering [M], pp. 150–156. Petroleum Industry Press, Beijing (2011)
Zhao, J., Zhang, S.: Research on pressure drop propagation law of coalbed methane drainage [J]. Coal Sci. Technol. 40(10), 65–68 (2012)
Haiyang, H., et al.: Effects of pressure drop funnels model of different shapes on CBM well productivity [J]. Coal Geol. Explor. 47(3), 109–116 (2019)
Du, C., et al.: Study on reservoir pressure transmission feature of coalbed methane under condition of multi-well exploitation coal science and technology [J]. Coal Sci. Technol. 44(12), 179–183 (2016)
Xue, C., Cao, W., Zhong, Y.: Natural Gas Exploration and Development 23(4), 44–49 (2000)
Jian, Z., Zhiming, W.: Application of material balance method in production performance prediction of coalbed methane reservoirs [J]. Coal Geol. Explor. 37(3), 23–26 (2009)
Chuandong, Y., Sang, Y.: Application of material balance method in productivity prediction of coalbed methane Wells [J]. Drill. Prod. Technol. 23(4), 33–37 (2000)
Xia, Y., et al.: Research on well interference of coalbed methane wells and its application [J]. Lithol. Reservoirs 27(2), 126–132 (2015)
Zhang, S., et al.: Study on interference well test technology between coalbed methane wells [J]. Coal Sci. Technol. 43(12), 75–79 (2015)
Fengpeng, L., et al.: Dynamic prediction method of coalbed methane well under consideration of inter-well interference [J]. J. China Univ. Min. Technol. 42(2), 251–256 (2013)
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2024 The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.
About this paper
Cite this paper
Gao, Y. et al. (2024). Research on Water Invasion Intensity of Coalbed Methane Wells Based on Material Balance Method. In: Lin, J. (eds) Proceedings of the International Field Exploration and Development Conference 2023. IFEDC 2023. Springer Series in Geomechanics and Geoengineering. Springer, Singapore. https://doi.org/10.1007/978-981-97-0268-8_2
Download citation
DOI: https://doi.org/10.1007/978-981-97-0268-8_2
Published:
Publisher Name: Springer, Singapore
Print ISBN: 978-981-97-0267-1
Online ISBN: 978-981-97-0268-8
eBook Packages: EngineeringEngineering (R0)