超深高压裂缝性储层加砂压裂技术研究

Proppant Fracturing Technology Research of Ultra-Deep High Pressure Fractured Reservoir

针对大北、克深超深高压裂缝性砂岩储层改造的"三高"难题(施工泵压高、压裂液性能要求高、砂堵风险高),研究了降低井口施工泵压的对策。通过研发耐高温加重压裂液体系,配置大通径管柱结构,优选小粒径高强度支撑剂,配套高压施工设备和井口,应用小型测试压裂技术、支撑剂段塞技术、酸预处理技术等压前预处理技术,配合加砂压裂现场实施控制,形成了超深高压裂缝性砂岩储层改造技术,在大北、克深气田取得较好的增产改造效果。

For Dabei and Keshen ultra-deep high pressure fractured reservoirs,there are three high problems,such as high pump pressure,high requirement of fracturing fluid,high risk of sand out.By developing high temperature weighting fracturing fluid,providing big drift diameter,optimizing little grain size and hi-strength proppant,supporting high pressure preparation of construction and well head,applying preprocessing technology before fracturing as mini frac,proppant slug and acid preprocessing,coordinating field control of proppant fracturing,the proppant fracturing technology of ultra-deep high pressure fractured reservoirs is built-up,and preferable stimulated effect is acquire.