大庆石油地质与开发2018，Vol.37Issue(3)：90-95,6.DOI:10.19597/J.ISSN.1000-3754.201707043
基于数值模拟的径向井压裂裂缝形态
CRACK MORPHOLOGY OF THE RADIAL WELL FRACTURING BASED ON THE NUMERICAL SIMULATION
摘要
Abstract
Much better development effects have achieved for radial well fracturing technique in recent years,but the technology is still lack of the application and study in tight gas reservoirs.The extended finite element method (XFEM) has been maturely adopted in the hydraulic fracturing simulation.Based on fluid-solid coupling equation and integrating with the field data,the XFEM model for the radial well fracturing was established in order to research the laws of the fracture initiation and propagation.With the help of the numerical simulation,the influencing laws of different parameters on the fracture morphology were quantified and analyzed,the fracture morphology of the multi radial well fracturing was made clear,and moreover the optimized perforating scheme for the multi-radial well was put forward.The achievements show that for the induced stress field by the fracturing along the radial well,the directional extension of the key fracture can be realized to a certain deal along the well in the field;The vertical multi-radial wells can effectively improve the controllability of the fracture morphology;The key crack morphology of the horizontal multi-radial well is composed of the key morphology of the single radial well,but the included angle between the radial well and horizontal maximum principle stress determines the breakdown pressure and fracture extended degree in the radial well block.The study achievements possess important guiding significance for the field application.关键词
径向井压裂/诱导应力场/裂缝形态/定向扩展/扩展有限元Key words
radial well fracturing/induced stress field/fracture/crack morphology/orientated propagation/extended finite element method (XFEM)分类
能源科技引用本文复制引用
李小龙,李建雄,王涛,张凯文,郭天魁,曲占庆..基于数值模拟的径向井压裂裂缝形态[J].大庆石油地质与开发,2018,37(3):90-95,6.基金项目
国家自然科学基金青年基金项目“径向钻孔引导水力压裂裂缝定向扩展机理研究”(51404288). （51404288）
