摘要
塔河油田缝洞型碳酸盐岩层间应力差小,高角度裂缝发育且无统一油水界面。随着开发程度的加大,油藏油水界面上升,单井平均酸压避水高度逐年减小,控缝高酸压难度增大,大部分井面临着措施后高含水的风险。在前期"三降二配套"控缝高酸压基础上,通过对缝高延伸机理的研究,形成多级停泵控缝高、覆膜砂控缝阻水技术。压后评价得出实际缝高可控制在30 m之内,有效延长无水采油期500余天,在一定程度上有效解决了控缝高技术难题。
The fractured-vug carbonate reservoir in Tahe oilfield has small interlayer stress difference,developed high-angle fractures and without unified oil-water interface. With the increase of reservoir development,oil-water interface is rising,the average height of water avoidance is decreasing year by year,the fracture height-growth control become more difficult,so most wells are facing the risk of high water cut after acidizing.Based on the early fracture height-growth control technologies,multi-stage pump stop control fracture height-growth technology and the coated sand fracture height controlling and water-blocking technology were formed by studying fracture height extension mechanism. Evaluation after acid fracturing confirmed that the fracture height could be controlled under 30 m and the water free oil production period was effectively prolonged for 500 days.
出处
《钻采工艺》
CAS
北大核心
2015年第4期47-50,8,共4页
Drilling & Production Technology
基金
国家科技重大专项课题"碳酸盐岩缝洞型油藏采油技术完善与应用"(编号:2011ZX05049-003-003)资助
关键词
塔河油田
避水高度
覆膜砂
控缝阻水
多级停泵沉砂
Tahe oilfield,water avoidance height,resin coated sand,fracture control and water resistance,multi-stage pump stop sand
