摘要
常规水平井加砂压裂工艺存在支撑剂回流现象严重、铺置效果不理想等问题。针对川西气田水平井压裂后压裂液返排效率低、支撑剂回流现象严重等问题,研制出可降解纤维及与之配套的纤维降解剂,形成了可降解纤维材料体系,以提高压裂液返排效率,改善裂缝导流能力,并防止支撑剂回流,改善支撑剂铺置效果,进而提高压裂改造效果。通过在川西气田水平井采用可降解纤维材料体系实施纤维加砂压裂工艺,有效提高了压裂后压裂液返排效率,减少了支撑剂回流量,改善了压裂效果,为水平井防支撑剂回流提供了借鉴经验。
Such issues exist in conventional fracturing process as proppant backflow and not ideal proppant paving effect. Flowback efficiency of the western Sichuan gas field after horizontal well fracturing is low and proppant backflow phenomenon is serious. In order to increase the flowback efficiency,improve fracture diverting capacity,prevent backflow of the proppant and improve proppant paving effect and fracturing reconstruction effect,developed was a biodegradable fiber and a matching fiber degradation reagent and formed was a biodegradable fiber material system. Applied was the biodegradable fiber material system in fiber and sand horizontal well fracturing process of the western Sichuan gas field and flowback speed after fracturing has been increased,proppant backflow has been reduced and fracturing effect has been improved effectively.
出处
《天然气与石油》
2013年第5期46-49,7,共4页
Natural Gas and Oil
基金
国家科技重大专项(2011ZX05024-004-04)
关键词
水平井
纤维
压裂
支撑剂回流
降解剂
Fiber
Fracturing
Proppant backflow
Horizontal well
Degradation reagent
