[1]陈同刚,汪启年,朱将波,等.煤层及其顶、底板岩石力学性质对水力压裂裂缝延伸的控制[J].华东地质,2018,39(03):212-217.[doi:10.16788/j.hddz.32-1865/P.2018.03.007]
 CHEN Tong-gang,WANG Qi-nian,ZHU Jiang-bo,et al.Control of mechanical properties of coal seam and its roof and floor rocks over the crack extension during hydraulic fracturing[J].East China Geology,2018,39(03):212-217.[doi:10.16788/j.hddz.32-1865/P.2018.03.007]
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煤层及其顶、底板岩石力学性质对水力压裂裂缝延伸的控制()
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《华东地质》[ISSN:2096-1871/CN:32-1865/P]

卷:
39
期数:
2018年03期
页码:
212-217
栏目:
矿床地质
出版日期:
2018-09-15

文章信息/Info

Title:
Control of mechanical properties of coal seam and its roof and floor rocks over the crack extension during hydraulic fracturing
文章编号:
2096-1871(2018)03-212-06
作者:
陈同刚1汪启年1朱将波1汤达祯2许 浩2
(1. 安徽省勘查技术院,合肥 230031; 2. 中国地质大学(北京)能源分院,北京 100083)
Author(s):
CHEN Tong-gang1 WANG Qi-nian1 ZHU Jiang-bo1 TANG Da-zhen2 XU Hao2
(1. Institute of Exploration Technology of Anhui Province, Hefei 230031, China; 2. School of Energy Resources, China University of Geosciences(Beijing), Beijing 100083, China)
关键词:
煤层 煤层顶、底板 岩石力学性质 裂缝
Keywords:
coal seam roof and floor rock mechanical property fracture
分类号:
TE37; TD313
DOI:
10.16788/j.hddz.32-1865/P.2018.03.007
文献标志码:
A
摘要:
为了揭示煤层及其顶、底板岩石力学性质对水力压裂裂缝延伸的影响,应用岩石三轴伺服机测试陕西韩城地区煤层及顶、底板岩石力学性质,总结不同类型岩石力学性质特征和差异; 剖析孔隙率和含水率与岩石力学性质之间的关系,探讨岩石力学性质差异对煤层水力压裂的影响。研究表明:岩石强度随孔隙度增大而降低; 岩石矿物成分及其胶结程度与孔隙度决定岩石的软化程度,水分对不同类型岩石强度的影响方式和程度差异较大; 当煤层埋藏较浅,煤层与顶、底板岩石的弹性模量存在较大差异时,水力压裂裂缝更易控制在煤层中,且延伸更长更远。
Abstract:
In order to reveal the influence of mechanical properties of coal seam and its roof and floor rocks on crack extension during hydraulic fracturing, rock three-axis stress was used to test rock mechanical properties of various coal seams and their roof, floor rocks in the Hancheng area, Shaanxi Province. Characteristics and differences of mechanical properties of various rocks are summarized in this study. Through analyzing the relationships between porosity and water content, we explored influences of the differences of mechanical properties on fracture extension. The testing results show that rock strength decreases with increasing porosity, rock softening property depends on mineral compositions and rock porosity, and water contents greatly affect the strength of various rocks in different ways. For a shallowly-buried coal seam, roof and floor rocks of which have significant differences in elastic modulus, hydraulic cracking can be easily restricted within coal seam but extends much further.

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备注/Memo

备注/Memo:
收稿日期:2017-09-13 修订日期:2017-12-01 责任编辑:谭桂丽
基金项目:国家科技重大专项 “煤层气藏储渗空间特征与渗流机理研究(编号:2011ZX05038-001)”和国家自然科学基金(编号:41272175)项目联合资助。
第一作者简介:陈同刚,1988年生,男,工程师,主要从事地质调查及物探找矿工作。
更新日期/Last Update: 2018-09-26