含水饱和度对中阶煤储层应力敏感性影响实验

张泽文; 周效志; 侯旭伟; 陶智辉; 李晓伟

doi:10.3969/j.issn.1001-1986.2018.05.021

含水饱和度对中阶煤储层应力敏感性影响实验

中国矿业大学资源与地球科学学院，江苏徐州 221116

基金项目:

中国地质调查局煤层气基础地质调查项目（DD20160186）

详细信息

作者简介:
张泽文,1994年生,男,湖南衡阳人,研究方向为煤层气地质.E-mail:397250923@qq.com

通讯作者:
周效志,1982年生,男,山东青州人,博士,从事煤层气地质与开发工程工作.E-mail:cumtzxz@163.com

中图分类号: P618.11
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出版历程
- 收稿日期: 2018-06-10
- 发布日期: 2018-10-24

The influence of water saturation on the stress sensitivity of medium rank coal reservoirs

School of Resources and Geoscience, China University of Mining and Technology, Xuzhou 221116, China

Funds:

Basic Geological Survey Project of Coalbed Methane,China Geological Survey(DD20160186)

摘要

摘要: 为了查明含水饱和度对中阶煤储层应力敏感性的影响，对煤层气井储层改造及排采工作提供指导，利用自主设计的实验装置开展了黔西松河矿龙潭组1+3号、15号煤干燥、含水及饱水条件下液测、气测渗透率应力敏感性实验，分析了煤样渗透率、渗透率损害率、渗透率不可逆损害率、应力敏感性系数变化特征。研究结果表明：随着含水饱和度升高，中阶煤液测渗透率应力敏感性增强，加卸载造成的渗透率不可逆损害率增大。含水饱和度升高导致初始气测渗透率降低，干燥煤样孔裂隙闭合程度高，饱水煤样因束缚水饱和度高，具有较强的气测渗透率应力敏感性。干燥煤样、含水煤样适宜采用幂函数表征无因次气测渗透率与有效应力的关系，饱水煤样则更适合采用负指数函数表征两者关系。中阶煤储层压裂及排采过程中应重视储层保护，当煤储层含水性较弱时，应优先考虑采用CO₂或N₂泡沫压裂方式进行储层改造。
- 含水饱和度 /
- 中阶煤 /
- 应力敏感性 /
- 渗透率
Abstract: In order to ascertain the effect of water saturation on the stress sensitivity of middle-rank coal reservoirs, a self-designed experimental device was used to develop the dryness, water-bearing and water-saturation conditions of seams No.1+3 and No.15. The liquid and gas permeability susceptibility tests were performed to analyze the characteristics of coal sample permeability, permeability damage rate, irreversible damage rate, and stress sensitivity coefficient, and the reservoir gas recovery and drainage of coalbed methane wells were investigated, which possesses a guiding significance for the reservoir reconstruction and drainage work of coalbed gas well. Results show that with the increase of water saturation, the permeability sensitivity of medium-rank coal liquid permeability increases, and the irreparable damage rate caused by loading and unloading increases. The increase of water saturation leads to the decrease of the initial gas permeability, the high degree of fracture closure of the dry coal samples, and the high saturation of the saturated coal-like irreducible water, then it has strong gas-permeability stress sensitivity. The dry coal and water samples are suitable to characterize the relationship between permeability and effective stress of non-dimensional gas by power function. The saturated coal sample is more suitable to characterize the relationship by negative exponent function. During the fracturing and drainage of medium-rank coal reservoirs, attention should be paid to reservoir protection. When the coal reservoirs contain relatively weak water, priority should be given to adopt CO₂ or N₂ foam fracturing methods for reservoir reconstruction.
- water saturation /
- medium rank coal /
- stress sensitivity /
- permeability

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参考文献(19)

[1]	许浩,汤达祯,秦勇,等. 黔西地区煤储层压力发育特征及成因[J]. 中国矿业大学学报,2011,40(4):556-560. XU Hao,TANG Dazhen,QIN Yong,et al. Characteristics and origin of coal reservoir pressure in the west Guizhou area[J]. Journal of China University of Mining & Technology,2011, 40(4):556-560.
[2]	张培河. 沁水煤田煤储层压力分布特征及影响因素分析[J]. 煤田地质与勘探,2002,30(6):31-32. ZHANG Peihe. Characters of distribution and influencing factors about the reservoir pressure in Qinshui coalfield[J]. Coal Geology & Exploration,2002,30(6):31-32.
[3]	杜严飞,吴财芳,邹明俊,等. 煤层气排采过程中煤储层压力传播规律研究[J]. 煤炭工程,2011,1(7):87-89. DU Yanfei,WU Caifang,ZOU Mingjun,et al. Study on reservoir pressure transmission law during gas mining and drainage process of coalbed methane well[J]. Coal Engineering,2011,1(7):87-89.
[4]	魏建平,位乐,王登科. 含水率对含瓦斯煤的渗流特性影响试验研究[J]. 煤炭学报,2014,39(1):97-103. WEI Jianping,WEI Le,WANG Dengke. Experimental study of moisture content influences on permeability of coal containing gas[J]. Journal of China Coal Society,2014,39(1):97-103.
[5]	荆俊杰,梁卫国,张倍宁,等. 含水率对煤层瓦斯渗流特性影响的试验研究[J]. 太原理工大学学报,2016,47(4):450-454. JING Junjie,LIANG Weiguo,ZHANG Beining,et al. Experimental investigaion on coal permeability under water injection[J]. Journal of Taiyuan University of Technology,2016, 47(4):450-454.
[6]	韦纯福,李化敏,袁瑞甫. 含水率对煤与瓦斯突出强度影响的试验研究[J]. 煤炭科学技术,2014,42(6):118-121. WEI Chunfu,LI Huamin,YUAN Ruifu. Experimental study on intensity of coal and gas outburst effected by coal water content[J]. Coal Science and Technology,2014,42(6):118-121.
[7]	王俊峰,张力,赵东. 温度及含水率对切削原煤吸附瓦斯特性的影响[J]. 煤炭学报,2011,36(12):2086-2091. WANG Junfeng,ZHANG Li,ZHAO Dong. Effects of temperature and moisture content on gas adsorption characteristics of cutting raw coal[J]. Journal of China Coal Society,2011,36(12):2086-2091.
[8]	聂百胜,何学秋,王恩元,等. 煤吸附水的微观机理[J]. 中国矿业大学学报,2004,33(4):379-383. NIE Baisheng, HE Xueqiu, WANG Enyuan, et al. Micro-mechanism of coal adsorbing water[J]. Journal of China University of Mining & Technology,2004,33(4):379-383.
[9]	李祥春,聂百胜. 煤吸附水特性的研究[J]. 太原理工大学学报,2006,37(4):417-419. LI Xiangchun,NIE Baisheng. Study of characteristics of coal adsorbing water[J]. Journal of Taiyuan University of Technology,2006,37(4):417-419.
[10]	陈刚,秦勇,杨青,等. 不同煤阶煤储层应力敏感性差异及其对煤层气产出的影响[J]. 煤炭学报,2014,39(3):504-509. CHEN Gang,QIN Yong,YANG Qing,et al. Different stress sensitivity of different coal rank reservoir permeability and its effect on the coalbed methane output[J]. Journal of China Coal Society,2014,39(3):504-509.
[11]	陈术源,秦勇,申建,等. 高阶煤渗透率温度应力敏感性试验研究[J]. 煤炭学报,2014,39(9):1845-1851. CHEN Shuyuan,QIN Yong,SHEN Jian,et al. Temperature-stress sensitivity of high-rank coal permeability[J]. Journal of China Coal Society,2014,39(9):1845-1851.
[12]	郭乐乐,汤达祯,许浩,等. 黔西滇东地区不同煤阶煤储层物性特征分析[J]. 煤炭科学技术,2014,42(8):99-103. GUO Lele,TANG Dazhen,XU Hao,et al. Analysis on physical property features of different coal rank coal reservoirs in western Guizhou and eastern Yunnan area[J]. Coal Science and Technology,2014,42(8):99-103.
[13]	郑贵强. 不同煤阶煤的吸附、扩散及渗流特征实验和模拟研究[D]. 北京:中国地质大学(北京),2012.
[14]	肖晓春,潘一山,吕祥锋,等. 含水煤岩变形破坏过程中瓦斯运移规律的实验研究[J]. 煤炭学报,2012,37(增刊1):115-119. XIAO Xiaochun,PAN Yishan,LYU Xiangfeng,et al. Experimental research on gas flow law of containing water coal specimens in deformation and fracture process[J]. Journal of China Coal Society,2012,37(S1):115-119.
[15]	左银卿,张学英,周,等叡. 沁南地区高煤阶煤储层水敏效应及其控制因素[J]. 油气地质与采收率,2014,21(5):107-110. ZUO Yinqing,ZHANG Xueying,ZHOU Rui,et al. Water sensitivity and its controlling factors on high-rank coal reservoirs in southern Qinshui basin[J]. Petroleum Geology and Recovery Efficiency,2014,21(5):107-110.
[16]	蒋长宝,段敏克,尹光志,等. 不同含水状态下含瓦斯原煤加卸载试验研究[J]. 煤炭学报,2016,41(9):2230-2237. JIANG Changbao, DUAN Minke, YIN Guangzhi, et al. Loading-unloading experiments of coal containing gas under the condition of different moisture contents[J]. Journal of China Coal Society,2016,41(9):2230-2237.
[17]	孟雅,李治平. 覆压下煤的孔渗性实验及其应力敏感性研究[J]. 煤炭学报,2015,40(1):154-159. MENG Ya,LI Zhiping. Experimental study on the porosity and permeability of coal in net confining stress and its stress sensitivity[J]. Journal of China Coal Society,2015,40(1):154-159.
[18]	孟召平,侯泉林. 高煤级煤储层渗透性与应力耦合模型及控制机理[J]. 地球物理学报,2013,56(2):667-675. MENG Zhaoping,HOU Quanlin. Coupling model of stressdepent permeability in high-rank coal reservoir and its control mechanism[J]. Chinese Journal of Geophysics,2013,56(2):667-675.
[19]	张亚蒲,何应付,杨正明,等. 煤层气藏应力敏感性实验研究[J]. 天然气地球科学,2010,21(3):518-521. ZHANG Yapu,HE Yingfu,YANG Zhengming,et al. Experimental research on stress sensitivity of coalbed reservoir[J]. Natural Gas Geoscience,2010,21(3):518-521.

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