利用成长因子恢复沁水盆地M区块三维古应力场  

Three-Dimensional Recovery of Palaeotectonic Stress Fields in M Block of Qinshui Basin Using Growth Factor

作　　者：冯小英 李佳润 欧阳雪琪 刘冯俊男 范立红 焦勇 FENG Xiaoying;LI Jiarun;OUYANG Xueqi;LIU Fengjunnan;FAN Lihong;JIAO Yong(Exploration and Development Research Institute,PetroChina HuaBei Oilfield Company,Hebei 062552;China University of Petroleum(East China),Shangdong 266580)

机构地区：[1]中国石油华北油田分公司勘探开发研究院,河北062552 [2]中国石油大学(华东),山东266580

出　　处：《中国煤层气》2023年第3期41-46,共6页China Coalbed Methane

摘　　要：地应力与煤层气高产密切相关,现今应力场决定了煤层气的排采制度,而古应力场控制了天然裂缝的发育规律,古今应力场的三维恢复对于煤层气勘探开发尤其重要。以沁水盆地M区块3号煤为例,在地层剥蚀量恢复基础上,开展了三维构造发育史研究;然后通过分析主要运动时期的煤层埋藏深度的变化,即煤层成长因子的变化,恢复了古今三维应力场,为后续煤层气开发井位部署与排采制度的制定提供了可靠依据。同时,还实现了古地应力场的恢复,为研究储层天然裂缝提供了新思路,为其他地区研究提供借鉴。The in-situ stress and the abundant coalbed methane accumulation and high production in coal reservoirs are closely related.The present stress field determines the coalbed methane production system,while the palaeotectonic stress field controls the development patterns of natural fractures.The three-dimensional recovery of the palaeotectonic and present stress fields is particularly important for the exploration and development of high-rank coalbed methane.Taking the No.3 coal seam in Block M of the Qinshui Basin as an example,a three-dimensional structural development history study is conducted.By analyzing the burial depth of the coal seam during the main tectonic movement periods,i.e.,the variation of the coal seam growth factor.The paleotectonic and present three-dimensional stress fields were recovered using numerical simulation and other methods.This provides a reliable basis for the subsequent deployment of well locations and the formulation of extraction systems for coalbed methane.This study provides new insights into the study of reservoir natural fractures and can serve as a reference for research on stress files and fractures in other regions.

关 键 词：地应力 三维 构造演化 成长因子 剥蚀量恢复 

分 类 号：P618.13[天文地球—矿床学]