压裂返排技术优化

Fracturing flowback technology optimization

李小龙 肖雯 刘晓强 周丽萍 许华儒 曲占庆

中国石油大学（华东）石油工程学院，山东 青岛 266580 中国石化胜利油田分公司采油工艺研究院，山东 东营 257000

College of Petroleum Engineering, China University of Petroleum, Qingdao 266580, China Research Institute of Oil Production Technology, Shengli Oilfield Company, SINOPEC, Dongying 257000, China

压裂后排液过程中，压裂液的返排速度、破胶黏度对支撑剂总回流量的影响很大。通过研究压裂液返排速度、破胶黏度对支撑剂总回流的影响，确定了压裂液的最佳返排速度及时机，建立了不同井口压力下的放喷制度，形成了完善的压裂助排技术。该技术主要包括超低界面张力助排技术、ADC自生氮化合物助排技术以及预制、伴注气体助排技术。

Flowback is required after fracturing for regular production. The quantity and distribution of proppant are influenced a lot by the flowback speed and fluid viscosity. Having studied the influence of flowback speed and gel-breaking viscosity on the flowback of the proppant, the best time and speed of flowback are determined. A blowout system of different pressure of wellhead is established. A series of supporting techniques are formed, such as ultra low interfacial tension cleanup technique, ADC technique, accompanying gas cleanup technique.

10.6056/dkyqt201503029