摘要
大庆油田火山岩储层压裂施工常表现出施工压力高、加砂困难、裂缝延伸压力大等特征。为了从机理上认识火山岩压裂裂缝延伸规律及其影响因素，采用三轴岩石力学参数测试仪和断裂韧性测试仪，测试并且分析了火山岩储层岩石抗压强度、弹性模量、泊松比、毕奥特（Biot）系数和断裂韧性等力学参数，对比了火山岩岩心与砂岩岩心的力学特性。通过实验数据分析比对发现，凝灰岩岩心、砂砾岩岩心、流纹岩岩心和砂岩岩心的三轴应力压缩实验应力应变曲线存在较大区别，这些力学特性参数可为认识火山岩储层压裂机理提供依据。
Fracturing in Daqing Oilfield oftenly presents features of high working pressure, difficult sand-adding and great fracture extension pressure. In order to understand the regulation of induced volcanic fracture extension and its influence, the compressive strength, elastic modulus, poisson ratio, Blot coefficient, fracture toughness and some other mechanical parameters are measured and analyzed with triaxial rock mechanical parameter tester and fracture toughness tester, and mechanical properties of volcanic cores and sandstone cores are compared. The experimental data comparison indicates that the stress-strain curves from traxial stress compression experiment of tuff cores, glutinite cores, rhyolite cores and sandstone cores are very different, and these mechanical properties parameters provide ground for understanding of fracturing mechanism of volcanical rocks.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2011年第1期118-122,共5页
Petroleum Geology & Oilfield Development in Daqing
基金
国家重点基础研究发展计划（“973”计划）项目“火山岩储层及其油气藏识别与评价技术研究”（2009CB219307）资助.
关键词
大庆油田
火山岩
弹性模量
泊松比
断裂韧性
毕奥特系数
Daqing Oilficld
volcanic rocks
elastic modulus
poisson ratio
fracture toughness
Biot coefficient
