摘要
常规滑溜水防膨效果不理想,无溶蚀钙质功能,在非海相页岩储层压裂效果不理想,亟需开发一种集降阻、溶蚀、造缝、防膨及携砂一体的新型多功能滑溜水体系。本研究合成了一种新型耐酸型减阻剂,在酸中具有良好的增黏和稳定性能,优选了防膨和缓蚀双重功能缓蚀剂,大幅度提高体系防膨性能,加入黏土稳定剂和助排剂形成了多功能酸性滑溜水压裂体系。研究结果表明:该酸性滑溜水室内降阻率可达69%,防膨率大于90%,表面张力小于28 mN/m,腐蚀速率小于5 g·m^-2/h,满足各项性能要求。经现场实验,表现出较好的降压降阻效果,在裂缝中起到了溶蚀扩缝降压作用,具有良好的推广应用前景。
The result of fracturing nonMarine shale by conventional slick-water with poor anti-swelling effect and without dissolving calcium function is unsatisfactory. Therefore, it is urgent to develop a novel multifunctional slick-water system integrating drag reduction, dissolution, fracture, anti-swelling and sand carrying. In this study, a new type of acid-resistant drag reduction agent was synthesized, which has good viscosity-increasing and stable performance in acid. Corrosion inhibitor with the dual function was optimized to greatly improve the anti-swelling and corrosion mitigation. The multifunctional acidic slick-water was formed by adding clay stabilizer and the cleanup additive. The results show that the acidic slick-water with drag reduction rate up to 69%, anti-swelling rate higher than 90%, surface tension less than 28 mN/m, and the corrosion rate less than 5 g·m^-2/h meets various performance requirements. After field test, it shows good effect of reducing pressure and resistance, and plays an important role in dissolving, expanding fracture and pressure reduction in fracturing. Thus, the acidic slick-water has good promoted application prospect.
作者
杨琛
眭世元
贾文峰
王程程
姚奕明
沈子齐
YANG Chen;SUI Shiyuan;JIA Wenfeng;WANG Chengcheng;YAO Yiming;SHEN Ziqi(State Key Laboratory of Shale Oil Gas Enrichment Mechanisms and Effective Development,Beijing 100101;Sinopec Research Institute of Petroleum Engineering,Beijing 100101;China University of Petroleum(Beijing),Beijing 102249)
出处
《钻井液与完井液》
CAS
北大核心
2020年第1期116-120,126,共6页
Drilling Fluid & Completion Fluid
基金
中国石化石油工程技术服务有限公司重点项目“多重乳化酸体系研究”(SG16-38K)
国家重大科技专项课题2“彭水地区高效钻井及压裂工程工艺技术优化技术”(2016ZX05061-010)
国家重大科技专项“海相碳酸盐岩超深油气井关键工程技术”(2017ZX05005-005)。
关键词
页岩
压裂
酸性滑溜水
性能评价
Shale
Fracturing
Acidic slick water
Performance evaluaiton
