油气地质与采收率2017，Vol.24Issue(3)：116-121,6.
岩石脆性对水力压裂裂缝影响的数值模拟实验
Numerical simulation experiment of the effect of rock brittleness on fracture propagation of hydraulic fracturing
摘要
Abstract
The fracture initiation and propagation of hydraulic fracturing are important to post-fracturing performance of tight oil and gas reservoirs.Based on uniaxial compression experiment results of rock specimens taken from tight sandstone reservoir at 3 200 meters depth in certain block of Shengli oilfield,rock mechanics parameters used in the numerical simulation of uniaxial compression experiment were calibrated,and the effect of brittleness index and residual stress on hydraulic fracture propagation was investigated by using numerical simulation software RFPA2D.The results show that higher brittleness index is more favorable for hydraulic fracturing propagation,and hydraulic fracture with larger width and smaller initial stress can lead to larger area of effective complex fracture network and better hydraulic fracturing effects.When the residual stress is lower,the degree of development of hydraulic fracture is higher with wider fracture width and smaller initial stress and the effects of hydraulic fracturing are better.关键词
水力压裂/岩石脆性/残余应力/裂缝拓展/数值模拟Key words
hydraulic fracturing/rock brittleness/residual stress/fracture propagation/numerical simulation分类
能源科技引用本文复制引用
延新杰,李连崇,张潦源,李明,黄波,左家强..岩石脆性对水力压裂裂缝影响的数值模拟实验[J].油气地质与采收率,2017,24(3):116-121,6.基金项目
国家自然科学基金项目“软硬间互地层水力压裂裂缝三维延伸机理研究”(51479024),安徽省科技攻关计划项目“煤矿动力灾害事故智能预警防控技术与示范”(1604a0802109). （51479024）
