石油化工高等学校学报Issue(1)：42-47,6.DOI:10.3969/j.issn.1006-396X.2014.01.008
清水压裂多场耦合下裂缝扩展规律数值模拟分析
The Numerical Simulation Analysis of Crack Propagation Law under Riverfrac T reatment M ulti-Field Coupling
摘要
Abstract
Using the indoor experimental test , the intervals shale reservoir physical parameters , the rock mechanics parameters and the natural fracture distribution characteristic parameters were studied ,and the constitutive models of stress field-damage field-seepage field coupling and the failure criteria of the defective rock mass in the process of riverfrac treatment were established . Through the finite element numerical simulation by the software-Comsol , the crack propagation law of formation respectively under tensile and compressive shear stress was analyzed ,when the natural fracture system opens , hydraulic fracturing of shale reservoir artificial fracture network can be formed .When hydraulic fracture extended to natural fracture ,there has been a marked increase the width of cracks ,and hydraulic fracture direction changes ,one of the wings extended along the natural fracture on the wing ,the other one wing does not .There is obvious mutual interference between natural fracture .Process of multi cracks is developed from a small to a large crack fracture ,the final number of cracks depends on the connectivity between the cracks ;stress ,natural fracture ,perforation interval ,perforation ,dip ,construction flow and liquid viscosity ,are the main factors that influence the formation of multi cracks .关键词
清水压裂/多场耦合/损伤/有限元数值模拟/多分支缝形成机理Key words
Riverfrac treatment/Multi-field coupling/Damage/Finite element numerical simulation/Formation mechanism of multi-branch seam分类
能源科技引用本文复制引用
李士斌,李磊,张立刚..清水压裂多场耦合下裂缝扩展规律数值模拟分析[J].石油化工高等学校学报,2014,(1):42-47,6.基金项目
国家自然科学基金项目（51274069）。 （）
