环82区长8酸敏储层前置酸压裂技术研究与应用  

RESEARCH AND APPLICATION OF THE PREPOSITIONED ACID FRACTURING TECHNIQUE IN CHANG 8 ACID-SENSITIVE RESERVOIR

作　　者：蒋文学[1,2] 葛海江[1] 宁忠宏 金娜[1] 刘亭[3] 李勇[1] 李刚辉[2] 

机构地区：[1]川庆钻探工程公司钻采工程技术研究院低渗透油气田勘探开发国家工程实验室 [2]陕西科技大学化学与化工学院 [3]长庆油田公司第二采油厂

出　　处：《钻采工艺》2015年第1期69-71,4-5,共3页Drilling & Production Technology

基　　金：中石油川庆钻探工程公司重点科技攻关项目"油气藏改造液研究"(CQ2013B-20-1-4)资助

摘　　要：随着油田滚动勘探开发的不断深入,长庆陇东油田长8储层部分区块物性变差,采用常规加砂压裂工艺,单井产量偏低,需要探索新的工艺以提高单井产量。针对长庆陇东油田长8储层特点,室内开发了一套适应于长8酸敏储层的前置酸酸液体系,与目前体系比较,改进后前置酸酸液体系对研究区岩屑溶蚀率提高了35.4%,对胍胶压裂液的破胶液黏度降低了42.1%,岩心伤害率降低了67.9%,体现了较好的储层适应性。通过PT软件模拟提出了前置酸压裂工艺中的前置酸酸液用量强度、施工排量、关井时间。经现场32口井试验,长8酸敏储层前置酸压裂改造技术在环82区试油日产油量提高了20.4%,取得了较好的增产效果。With the exploration and development of oilfield,the physical properties of Chang 8 reservoir deteriorated in Changqing Longdong Oilfield. If using conventional fracturing technology,single well production would reduce. In order to improve production,a prepositioned acid system suited for Chang 8acid- sensitive reservoir was developed. Compared to the conventional acid system,the prepositioned acid system made the lithic dissolution rate increased by 35. 4%,gel breaker viscosity decreased by 42. 1%,core damage rate reduced by 67. 9%,and had better adaptability to the reservoir. The usage amount,fracturing discharge and shut- in time of the prepositioned acid were simulated by using PT software. Field application results in32 wells of Chang 8 acid- sensitive reservoir showed that the prepositioned acid fracturing technique achieved good results and daily oil production improved by 20. 4%.

关 键 词：酸敏储层 前置酸压裂 溶蚀性能 岩心伤害 关井时间 

分 类 号：TE357.2[石油与天然气工程—油气田开发工程]