石油地质与工程2025，Vol.39Issue(1)：114-118,122,6.
注液方案对水力裂缝扩展影响的数值模拟
Numerical simulation study on the influence of injection scheme on hydraulic fracture propagation
摘要
Abstract
Due to the interaction between hydraulic fractures and natural fractures during the fracturing process,the reservoir stimulation is affected,and the injection scheme also has a big impact on the expan-sion of hydraulic fractures.Clarifying the impact of the injection scheme on the expansion of hydraulic frac-tures is of great significance for the development of tight sandstone gas.A two-dimensional digital model of the tight sandstone formation in the Yanchang Formation of the Ordos Basin was established based on the ex-traction of natural fracture data using unmanned aerial vehicle(UAV)photogrammetric technique.The two-dimensional digital model was imported into ABAQUS finite element software,and hydraulic fracturing numerical simulations were carried out under three injection schemes using the method of globally embedding cohesive elements.The results show that the length and height of hydraulic fractures can be increased by using the pulse liquid injection with constant amplitude,the fracture pressure can be reduced by using the pulse liquid injection with variable amplitude,the variation trend of hydraulic fracture propagation pressure is highly consistent with the injection speed,and the failure mode of rock in the process of hydraulic fracture propagation is mainly tensile failure.关键词
水力压裂/cohesive单元/无人机摄影测量/天然裂缝/数值模拟Key words
hydraulic fracturing/cohesive element/unmanned aerial vehicle(UAV)photogrammetry/nat-ural fractures/numerical simulation分类
能源科技引用本文复制引用
左通,李严严,张梦雅,贺昱杰..注液方案对水力裂缝扩展影响的数值模拟[J].石油地质与工程,2025,39(1):114-118,122,6.基金项目
国家自然科学基金面上项目"鄂尔多斯盆地陆相页岩储层复杂缝网成生演化机制与可压裂性评价研究"(42077258). （42077258）
