Research progress on wells interference in coalbed methane mining

被引：0
|
作者：
Jia Q. [1 ]
Liu D. [1 ]
Cai Y. [1 ]
机构：
[1] School of Energy Resources, China University of Geosciences (Beijing), Beijing
来源：
Meitan Xuebao/Journal of the China Coal Society | 2020年 / 45卷
关键词：
Coalbed methane; Interference methods; Pressure drop propagation; Well spacing; Wells interference;
D O I：
10.13225/j.cnki.jccs.2020.0807
中图分类号：
学科分类号：
摘要：
Wells interference is the key for the vertical expansion of the pressure drop funnel in a single well and the superposition coupling of pressure drop propagation in adjacent wells.Accurate identification of coalbed methane (CBM) interference is conducive to reasonable layout and infill adjustment of well pattern.This paper analyzes the characteristics of reservoir pressure-propagation, main interference control factors, interference evaluation, well pattern-optimization and adjustment.Also, the paper systematically summarizes the main research progress of CBM wells interference and well pattern-adjustment at home and abroad:① The wells interference of the well-pattern is essentially the superposition of the pressure drop propagation of adjacent wells.The migration of energy from coal reservoirs by pressure drop enhances the dynamics of methane-desorption in pores and gas migration in fractures to some extent, which increases the productivity of interfering wells; ② Wells interference in coal reservoirs is mainly controlled by geological structure, permeability, coal body structure, roof-floor lithology, well spacing, fracturing effect, drainage-production system, and their coupling effects; ③ There are four methods to assess wells interference:interference well test, production dynamic analysis, mathematical model analysis, and numerical simulation analysis, and theoretical and practical analysis.Two or more methods can be combined to determine the degree of interference more accurately; ④ Infilling a horizontal well has a larger pressure relief range and longer pressure propagation distance than a vertical well, but it has higher requirements for geological conditions, and infill mining technology is complex.In addition, the future research directions in this field are pointed out, and the new trends of development include the fracture shape and elongation before and after wells interference of different reservoir types of CBM, the response mechanism of microscopic seepage and geochemistry to wells interference, the wells interference mass transfer mechanism of multiphase fluid coupled with precipitation and expansion, the determination of stress field and temperature field of CBM wells interference between positive and negative effect, the fluid transmission system and the mechanism of migration and accumulation after wells interference, the development of a new interference monitoring technology for nanomaterials, the intelligent identification of the degree of wells interference, and the development of new technology of wells interference optimization combined with CBM bioengineering. © 2020, Editorial Office of Journal of China Coal Society. All right reserved.
引用
下载
收藏
页码：882 / 893
页数：11
相关论文
共 57 条
  • [1] SONG Jinxing, SU Xianbo, WANG Qian, Et al., A new method for calculating gas content of coal reservoirs with consideration of a micro-pore overpressure environment, Natural Gas Industry, 37, 2, pp. 19-25, (2017)
  • [2] AN Jie, LIU Dawei, ZHANG Ping, Research on the interpretation method and its application of interference well test analysis for CBM drainage wells, Journal of China Coal Society, 42, 5, pp. 1236-1242, (2017)
  • [3] CLARKSON C R, QANBARI F., A semi-analytical method for forecasting wells completed in low permeability, undersaturated CBM reservoirs, Journal of Natural Gas Science and Engineering, 30, pp. 19-27, (2016)
  • [4] LIU Dameng, ZHOU Sandong, CAI Yidong, Et al., Study on effect of geo-stress on coal permeability and its controlling mechanism, Coal Scienceand Technology, 45, 6, pp. 1-8, (2017)
  • [5] CAI Yidong, LI Qian, LIU Dameng, Et al., Insights into matrix compressibility of coals by mercury intrusion porosimetry and N<sub>2</sub> adsorption, International Journal of Coal Geology, 200, pp. 199-212, (2018)
  • [6] MATTEO Marongiu Porcu MATTEO Marongiu Porcu, DONALD Lee, DAN Shan, Et al., Advanced modeling of interwell-fracturing interference:An eagle ford shale-oil study[J], SPE Journal, 21, 5, pp. 1567-1582, (2016)
  • [7] JIA Qifeng, NI Xiaoming, ZHAO Yongchao, Et al., Fracture extension law of hydraulic fracture in coal with different structure, Coal Geology & Exploration, 47, 2, pp. 51-57, (2019)
  • [8] KANG Yongshang, WANG Jin, JIANG Shanyu, Et al., Application of quantitative indexes in quantitative evaluation of coalbed methane development potential, Acta Petrolei Sinica, 38, 6, pp. 677-686, (2017)
  • [9] MORA C A, WATTENBARGER R A., Comparison of computation methods for CBM production performance, Journal of Canadian Petroleum Technology, 48, 4, pp. 42-48, (2009)
  • [10] LU Yiming, XUE Jianqiang, CHANG Lijing, Et al., Interference well test interpretation model for injection-production inter-well connection fracture parameters, Special Oil and Gas Reservoirs, 26, 5, pp. 86-91, (2019)
123456