深度酸压技术在川东北海相碳酸盐岩气藏改造中的应用-天然气与石油.DOC

川东北地区碳酸盐岩储层深度酸压技术 黄 霞（中石化西南石油局井下作业公司 德阳 618000?.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 .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“油气藏地质及开发工程”国家重点实验室摘 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酸液体系及“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。 关键词：川东北 碳酸盐岩 深度 酸压 酸液 工艺 pplication of deep acid fracture technology in sichuan Northeastern carbonate reservoir Huangxia1 ChengLiJun2,3 ZhongShuiQing4,5 (1.Downhole Operation Company of Southwest Oil Bureau Under SINOPIC; 2. Chongqing Engineering Research Center for Shale Gas Resource Exploration, Chongqing Institute of Geology and Mineral Resources, Chongqing 400042, China；3. Chongqing Shale gas Research Center of State Key Laboratory of Petroleum Resource and Prospecting, Chongqing 400042, China；4. China southwest oil gas company; 5. reservoir geology and development project national key laboratory. Southwest university of petroleum) ABSTRACTS: Carbonate reservoir of sichuan northeastern area is buried deeply, densification degree is high, burst pressure is high, formation temperature is high, construction friction is high, tiny cracks is growth, construction pressure of acidification fracturing is high, acid filtration is big, the speed of acid dissolution and acid rock reaction is quick, the action distance of acid dissolution is short, the corrosion of string is serious, degree of reservoir transformation is low, the increasing effects of the conventional acid fracture modification is very bad. Lots of application tests in field shows, use gelled acid or acid sticky controled with temperature become or?Lead liquid+ Gelled acid?or ?eMultilevel alternating injection+Closed acid?cane reduce the lost of strata filter effectively, delay the speed of acid dissolution and acid rock reaction, reduce the tubing corrosion, increase the the action distance of acid dissolution, Significantly improv