地应力及构造裂缝参数间的定量关系.pdfVIP

3 1 1 Vol. 3 1 No. 1 2 010 1 A CT A PETROLEI SINICA Jan. 2 010 : 0253O2697 ( 2 010) 01O0 06 8O0 5 季宗镇 戴俊生 汪必峰 ( 257061) : 根据裂缝形成的微观原理, 选用库伦) 莫尔准则及格里菲斯准则作为岩石剪性及张性 裂判断依据, 以岩石力学和断裂力 学中应变能及表面能理论为基础, 借助于表征单元体及裂缝平板渗流模型分别研究了三向挤压应力状态及有张应力存在情况下地 应力与构造裂缝参数之间的定量关系并给出计算模型使用该模型能够计算裂缝密度开度孔隙度渗透率等参数, 在渗透率的 计算中体现了矢量参数的方向性差异地应力与构造裂缝参数计算模型适用于砂岩碳酸盐岩火成岩等多种脆弹性岩层, 与地应 力场数值模拟相结合能够有效地进行储层裂缝的定量表征及裂缝参数的定量预测 : 构造裂缝参数; 地应力; 孔隙度; 渗透率; 储层裂缝; 定量表征; 定量预测 : T E1 111 2 : A Quantitati ve relationship between crustal stress and parameters of tectonic fracture JI Zongzhen DA I Junsheng WANG Bifeng ( Faculty of Geo-resources and Inf ormation, China University of Petroleum , Dongy ing 2 57 06 1, China) Abstract: On the bases of strain energy, surfa e energy in ro k and f ra turing me hani s theory , the relationship bet ween rustal st ress and parameters of te toni fra ture was onfirmed using the represent element volume and flat seepage model. The Coulumb- Mohr prin iple w as applied to the ex amination of shear fra ture, w hile Griffith prin iple was taken as the ex amination of t ension fra - ture. The al ulation model of the relationship betw een rustal stress and te toni fra ture parameter w as developed and used t o al- ulate aperture, density , porosit y and permeability of fra tures on the basis of paleo-fra ture parameters. T he al ulated ve tor pa- rameters su h as permeability w ere anisotropy using this model. In ombination with stress field numeri al simulation, the al ulation model is available to quantitave hara terization of reservoir fra t ures and predi tion of fra ture parameters in the brittle-elasti