中国石油大学学报（自然科学版）Issue(6)：1-8,8.DOI:10.3969/j.issn.1673-5005.2014.06.001
基于摩擦效应的砂岩裂缝密度定量预测
Quantitative prediction of fracture density based on friction effect
摘要
Abstract
Aiming at low-permeability reservoirs in compressional basins, a new fracture density quantitative prediction meth-od considering surface friction energy was developed using rock mechanic tests and theoretical derivation of relationships be-tween the stress field and fracture parameters. The results show that the combination of rock deformation criteria with the en-ergy conversion laws is an effective approach to establish the mechanical model of the stress field and fracture parameters. The fracture density increases with strain energy density, after the inner stress state exceeds failure conditions. In addition to breaking the inner cohesion in the sandstone, the formation of cracks has to overcome the resistance of the confining pressure and the frictional effect. The Coulomb-Moire criterion can be used to estimate rock rupture, and then to clarify the mathemat-ic relation between the stress-strain and rock fracture density. The predictions of the established model are in good agreement with the observed fracture density of low permeability sandstone in the northwest margin of Junggar Basin.关键词
低渗透砂岩/应力-应变/摩擦耗能/裂缝密度/定量预测Key words
low permeability sandstone/stress-strain/friction energy/fracture density/quantitative prediction分类
能源科技引用本文复制引用
宋璠,苏妮娜,冯建伟,罗彩明,陈静静,宋明福..基于摩擦效应的砂岩裂缝密度定量预测[J].中国石油大学学报（自然科学版）,2014,(6):1-8,8.基金项目
教育部博士点基金项目(20120133120013) （20120133120013）
国家科技重大专项(2011ZX05009) （2011ZX05009）
中央高校基本科研业务费专项(27R1201009A) （27R1201009A）
