高温碳酸盐岩油藏酸压用酸液体系发展与应用现状

Development and application of acid fluid system for acid fracturing of high-temperature carbonate reservoirs

田疆 杨映达

Tian Jiang Yang Yingda

中国石化 西北油田分公司, 乌鲁木齐 830011

SINOPEC Northwest Company, Urumqi, Xinjiang 830011, China

塔河油田碳酸盐岩缝洞型油藏储层改造存在高温条件下酸岩反应速度快、滤失量大的特点,常规酸液体系难以实现深度改造和提高酸蚀裂缝导流能力的目的.通过多年室内研究与现场试验,形成了以胶凝酸、变黏酸、转向酸、地面交联酸为主的多套酸液体系.通过高温流变实验,分析不同油藏类型酸压适合的酸液体系,指导单井酸压酸液选型和工艺优化,取得较好的现场应用效果.

In the reformations of fractured and vuggy reservoirs in the Tahe Oilfield, acid fluids and rocks reacted rapidly under high temperatures, and the filtration amount was large. Conventional acid fluid systems failed to realize deep reformations and to improve the conductivity of acid-etched fractures. Thanks to years of laboratory experiments and field tests, multiple sets of acid fluid systems including gelled acid, variable viscosity acid, steering acid and surface cross-linked acid were proposed. Through the analyses and comparisons of high-temperature rheological curves, different acid fluid systems were chosen according to different reservoir types. They were used to guide acid liquid selection and to improve technique in single well, and had obtained good application effects.

https://doi.org/10.11781/sysydz2014S1067