地质力学学报2018，Vol.24Issue(1)：35-41,7.DOI:10.12090/j.issn.1006-6616.2018.24.01.004
深层碳酸盐岩储层溶洞围岩应力分布研究
DISTRIBUTION OF SURROUNDING ROCK STRESS IN DEEP CARBONATE RESERVOIR KARST CAVE
摘要
Abstract
The Ordovician carbonate oil pool in northern Renqiu of the Jizhong depression is taken as an example in this article.The rock mechanical parameters in the study area were calculated based on the log data of the oil field,and the typical isolated water long elliptic karst cave of the target reservoir was selected,with its surrounding rock stress and its damage zone calculated by numerical simulation and third strength theory.The results show that:1) Under the combined action of overburden pressure and lateral pressure,the stress concentration effect zone of the long elliptic karst cave surrounding rock is 9 times of the radius.2) The surrounding rock stress of long elliptic karst cave is mainly compressive stress,mainly concentrating in the top and the bottom.3) The filling property of karst cave has great influence on the principal stress difference and damage range of surrounding rock.For the long-elliptic karst cave,the principal stress difference and shear damage of the surrounding rock increase with the increase of filling pressure when the filling pressure is less than 0.1 MPa;while the principal stress difference and the shear damage range of the surrounding rock gradually decrease with the increase of filling pressure when the filling pressure is more than 0.1 MPa.关键词
碳酸盐岩/溶洞/围岩应力/数值模拟Key words
carbonate rocks/karst cave/surrounding rock stress/numerical simulation分类
天文与地球科学引用本文复制引用
周汉国,郭建春,李静,彭成乐,王昌,高帅,郑金凯..深层碳酸盐岩储层溶洞围岩应力分布研究[J].地质力学学报,2018,24(1):35-41,7.基金项目
国家自然科学基金项目(41272141) （41272141）
国家科技重大专项(2016ZX05002-002) （2016ZX05002-002）
