压裂砂堵机理研究及预防技术  

STUDY OF FRACTURE SAND-PLUGGING MECHANISM AND PEVENTING TECHNOLOGY

作　　者：刘唯贤[1] 蒲仁瑞[1] 刘军善[2] 姜青梅[1] 王小彩[1] 

机构地区：[1]中原油田分公司天然气产销厂 [2]中原油田分公司井下特种作业处

出　　处：《内蒙古石油化工》2007年第9期91-93,共3页Inner Mongolia Petrochemical Industry

摘　　要：水利加砂压裂是低渗透气田的重要增产措施,由于大斜度定向完井,射孔方位与地应力决定裂缝方向的不一致,压裂层位的薄、多互层结构,使压裂井周初始产生弯曲裂缝及多裂缝,形成压裂砂堵。研究结果证实:形成压裂砂堵的主要因素是井周弯曲多裂缝限制了压裂液在裂缝中的流动;交叠多裂缝竞争缝宽引起支撑剂桥堵;多裂缝或天然裂缝滤失降低了压裂液的效率,影响了主裂缝的发育。预防压裂砂堵在钻井上尽量直井完钻,改善射孔相位,应用停泵同粒径支撑剂段塞技术,促进主裂缝延伸,保证足够的缝宽,预防压裂砂堵。Hydraulic fracture with sand is a stimulated technology in low permeability gas reservoir, During the operation, because of the directional completing-well with wide-angle, formation with many complicated fractures, all that result in sand-plugging in fracture. The result of analyzing show that the factors of sand-plugging are complicated fractures around the well,proppant plugging,a large of fracturing fluid leaks into the formation. These affect the central frautre extention, The technology of preventing sand-plugging is completing well straightly, improving the propecting orientation, using section-plugging fracture technology to improve the fracturing effection.

关 键 词：压裂井 砂堵机理 弯曲裂缝 多裂缝 段塞技术 

分 类 号：TE377[石油与天然气工程—油气田开发工程]