长庆气田碳酸盐岩储层加砂压裂试验研究

Research on Adding sand Fracture to Carbonate Reservoir in Changing Gas Field.

针对碳酸盐岩储层 ,长庆油田已形成了以普通酸酸压、稠化酸酸压、多级注入酸酸压—闭合酸化为主的三大酸压工艺技术系列且取得了较好的改造效果 ,但对致密碳酸盐岩储层 ,改造效果不理想。为此 ,2 0 0 0～ 2 0 0 2年先后开展了碳酸盐岩储层加砂压裂理论研究和四口井现场试验 ,以期克服酸蚀裂缝长度的局限性 ,提高缝长 ,获得更好的改造效果。从储层改造的技术思路、实施效果、取得的认识、存在的问题及下一步研究方向等方面进行了论述。

To carbonate reservoir in Changing gas field,three treatment systems,which are being fractured and acidizing with common acid,gelled acid,multiple grade injection acid for fracture and close for acidizing,has gained a good result except for that to dense carbonate reservoir.Field test in four wells and theoretical research for adding sand fracture to carbonate reservoir hand been conducted from 2001 to 2002,which prevent the limitation of gap length by acid erosion and prolonged gap length and achieved a reasonable effect.The paper discusses the technology thought,acidizing result,some knowledge and problems and study orientation to reservoir fractured.