采矿与安全工程学报2016，Vol.33Issue(3)：544-550,7.DOI:10.13545/j.cnki.jmse.2016.03.025
储层射孔压裂裂缝起裂与扩展的数值分析
Numerical study on fracture initiation and propagation of reservoirs subjected to hydraulic perforating
摘要
Abstract
Understanding hydraulic fracturing initiation and propagation in low permeability reservoir is of great significance for exploiting and enhancing recovery of unconventional oil and gas resources. Cement, mortar and quartz sand were mixed to model the natural shale rock. Our laboratory tests proved that, the mechanical properties, especially fracture toughness, were close to those of the natural shale rock. The numerical codes FRANC3D and ANSYS were adopted to probe into initiation and propagation of hydraulic fractures in reservoir rock in different horizontal stress ratio and perforation layout. The simulation and analysis have indicated that:1) Perforation fracturing initiation and propagation in three dimensions are properly simulated by FRANC3D and ANSYS; 2) The initiation fracture pressure de-creases with the increase of horizontal stress ratio; 3) Perforation parallel to the maximum horizontal stress has the smallest initiation fracture pressure. Propagation plane deflection tends to be parallel to the maximum horizontal stress when they are not in parallel; 4) Linearly distributed perforation is supe-rior to symmetric perforation and staggered perforation as it provides the minimum initiation fracture pressure.关键词
水力压裂/射孔布置/裂缝起裂与扩展/断裂韧性Key words
hydraulic fracturing/perforation/crack initiation and propagation/fracture toughness分类
矿业与冶金引用本文复制引用
赵熙,戴涛,鞠杨,胡慧芳,杨永明,龚文波..储层射孔压裂裂缝起裂与扩展的数值分析[J].采矿与安全工程学报,2016,33(3):544-550,7.基金项目
国家自然科学基金项目(51374213)；国家杰出青年科学基金项目(51125017)；山东胜利油田低渗透油藏综合利用示范基地建设项目(YKC0720) （51374213）
