一种新型酸基粘弹性压裂液的研究及应用  

RESEARCH ON THE NEW ACID-BASED VISCOELASTIC FRACTURING FLUID AND ITS APPLICATION

作　　者：郑华 李永寿[2] 贺正刚[3] 鄢宇杰[2] 

机构地区：[1]中海石油(中国)有限公司天津分公司渤海石油研究院,天津300452 [2]中国石化西北油田分公司工程技术研究院,新疆乌鲁木齐830011 [3]中国石化西北油田分公司塔河采油三厂,新疆库尔勒841604

出　　处：《新疆石油天然气》2014年第4期62-65,77,共5页Xinjiang Oil & Gas

摘　　要：为了提高低渗透、难动用储层的开发效益,在前人研究成果基础上研发改进了酸基粘弹性压裂液体系,它以粘弹性表面活性剂为稠化剂,通过在酸液中交联得到酸基清洁液压裂液体系。该体系继承原有粘弹性表面活性剂压裂液的优点,且根据酸岩反应进程实现自主转向酸压,真正实现了低渗透储层的深度改造。In order to improve the development benefit of the low-permeability and difficult-to-use reservoirs,acid-based viscoelastic fracturing fluid system is ameliorated on the basis of previous research,it uses viscoelastic surfactant as thickener and then gets fracturing fluid system which contains acid-base cleaning fluid when thickener is cross-linked in the acid.It inherits advantages of viscoelastic surfactant fracturing fluid system,and this kind of acid fluid can achieve self-diversion acid fracturing process according to the progress of acid-rock reaction,which can stimulate low – permeability reservoirs deeply.The results show that the acid-based viscoelastic fluid has good retardative property,and can effectively increase the activity of acid etching to maximize etching cracks.Its viscosity raises earlier than the traditional variable-viscosity acid,this is beneficial to prohibit acid from consuming and leaking off,which can grow effective etching fracture length.The residualacid can simultaneously break the glue with the p H value increases.Besides,the reacted acid breaks rapidly and completely,less pollution for the reservoir.It is used in the low permeability lime-sand rock reservoirs of Hua Bei Oil Field ultimately with obvious effect,and the success of the performance provides effective technological method for this kind of reservoirs.

关 键 词：酸基粘弹性压裂液 粘弹性表面活性剂 酸岩反应 酸压 

分 类 号：TE357.12[石油与天然气工程—油气田开发工程]