深层裂缝性复杂岩性气藏压裂技术研究  

RESEARCH ON FRACTURING TECHNOLOGY FOR DEEP FRACTURED AND COMPLEX LITHOLOGY GAS RESERVOIRS

作　　者：李勇明[1] 郭建春[1] 岳迎春[1] 赵金洲[1] 

机构地区：[1]油气藏地质及开发工程国家重点实验室.西南石油大学

出　　处：《钻采工艺》2010年第1期43-46,124,共4页Drilling & Production Technology

基　　金：四川省应用基础研究项目(2007JY042);国家自然科学基金项目(50774064)资助

摘　　要：新疆准噶尔盆地WB气藏储层深度2200～4500m,储层岩石中的火山岩含量达45%,天然微裂缝发育,储层表现为强水敏,压裂施工难度大。文章首先对WB气藏前期压裂施工资料进行了综合分析,明确了前期压裂改造存在的主要问题;结合该气藏的储层地质特征,从储层污染、压裂液伤害、压裂施工和压后排液等方面系统研究了影响该区压裂效果的关键因素和技术对策。提出了应用综合控高技术来防止缝高过度延伸,采用支撑剂段塞、优化施工参数等实现降滤失和防治多裂缝,并通过支撑剂嵌入实验和压裂液性能评价优选了适合该地层的支撑剂和压裂液体系。研究思路与技术认识对于WB气藏及类似低渗气藏的压裂改造具有一定指导意义。WB gas reservoir,located in Zhunger Basin in Xinjiang,has the reservoir depth of 2200m-4500m.Due to the high lava percent of 45% in reservoir rock,there are abundant natural fractures.Besides,the reservoir has strong water sensitivity.All the characteristics increase the difficulty of fracturing.This paper synthetically analyzed the fracturing datum before,and determined the main problems of former fracturing.Combined with the geologic features of this gas reservoir,the key factors and countermeasures affecting the stimulation effects were systematically studied.This paper adopted systematically fracture height control technology to control the fracture height,adopted proppant slug and construction parameters optimizing to decrease fluid loss and prevent multiple fractures,and optimized the fracturing proppant and fluid system through proppant bedding test and fracturing fluid performance evaluation.The research idea and cognition have for the fracturing stimulation in this kind of reservoirs.

关 键 词：气藏压裂 裂缝控制 压裂液 支撑剂 

分 类 号：TE357[石油与天然气工程—油气田开发工程]