川东北地区碳酸盐岩储层深度酸压技术  

Application of Deep Acid Fracturing Technology in Northeastern Sichuan Carbonate Reservoir

作　　者：黄霞[1] 程礼军 李克智[4] 钟水清[4,5] 朱洪涛[6] 

机构地区：[1]中国石化西南石油局井下作业公司,四川德阳618000 [2]重庆市页岩气资源与勘查工程技术研究中心.重庆地质矿产研究院,重庆400042 [3]油气资源与探测国家重点实验室重庆页岩气研究中心,重庆400042 [4]"油气藏地质及开发工程"国家重点实验室.西南石油大学,四川成都610050 [5]中国石油西南油气田公司,四川成都610051 [6]中国石化西南油气分公司工程监督中心,四川德阳618000

出　　处：《天然气与石油》2012年第3期40-44,100-101,共5页Natural Gas and Oil

基　　金：中国石化科研项目"元坝区块海相储层深度酸压工艺技术推广应用研究"资助(SG1007);国家自然科学基金资助项目(90610013)

摘　　要：川东北地区碳酸盐岩储层埋深大,致密化程度高,破裂压力高,地层温度高,施工摩阻高,微裂缝发育,酸压施工压力高、酸液滤失量大、酸蚀和酸岩反应速度快,酸蚀作用距离短,管柱腐蚀大,储层改造程度低,常规酸压改造增产效果差。大量现场应用试验表明,采用胶凝酸液和温控变粘酸液体系、"前置液+胶凝酸"及其多级交替注入和闭合酸压等深度酸压工艺能有效降低地层滤失,延缓酸蚀和酸岩反应速度,降低管柱腐蚀,增加酸蚀作用距离,显著提高酸蚀裂缝导流能力和天然气增产稳产效果。Carbonate reservoir in northeastern area of Sichuan has such characteristics as large burial depth,high densification degree,high bursting pressure and formation temperature,high construction friction,developed tiny cracks,high construction pressure of acidification fracturing,large acid filtration,rapid speed of acid etching and acid rock reaction,short action distance of acid dissolution,serious string corrosion,low reservoir transformation degree and poor stimulation effect of conventional acid fracture modification.A large number of field application test results show that application of such deep acid fracturing processes as gel acid,thermal control sticky acid system,ahead fluid plus gel acid and multilevel alternating injection plus closed acid fracturing can reduce strata filtration loss effectively,delay the speed of acid dissolution and acid rock reaction,reduce string corrosion,lengthen the action distance of acid dissolution and improve acid corrosion fracture flow capacity and gas increasing and stabilizing production effects significantly.

关 键 词：川东北 碳酸盐岩 深度 酸压 酸液 工艺 

分 类 号：TE357.2[石油与天然气工程—油气田开发工程]