缝洞型油藏储量评价方法及开发对策  

Reservoir Evaluation Method and Development Countermeasures for Fracture-Vuggy Reservoir

作　　者：耿甜 吕艳萍[1] 巫波[1] 张晓[1] 文欢 Geng Tian;Lyu Yanping;Wu Bo;Zhang Xiao;Wen Huan(SINOPEC Northwest Oilfield Company,Urumqi,Xinjiang 831011,China)

机构地区：[1]中国石化西北油田分公司,新疆乌鲁木齐831011

出　　处：《特种油气藏》2021年第6期129-136,共8页Special Oil & Gas Reservoirs

基　　金：国家科技重大专项“大型油气田及煤层气开发”子课题“塔里木盆地碳酸盐岩油气田提高采收率关键技术示范工程”(2016ZX05053-004)。

摘　　要：塔河缝洞型油藏储层非均质性强,开发中后期油水关系复杂且储量动用不均,导致剩余油挖潜难度大。针对现有储量分类方法无法有效指导主体区精细开发的问题,运用体积雕刻法进行储量复算,通过属性优选提高缝洞刻画精度,利用参数分区差异化赋值提高储量计算精度,根据缝洞连通特征与储量动用状况,细化储量分类标准,将已井控区储量划分为未连通储量、连通未动用储量、连通在动用储量3类。针对不同类型储量制订相应开发调整对策,未连通储量、连通未动用储量以部署新井、完善井网为主,连通在动用储量以井间注采调整为主。利用储量评价技术指导新井部署与注采调整,塔河4区投产新井31口,实施油水井措施25井次,日产油由270 t/d升至700 t/d,综合治理效果显著。研究成果对缝洞型油藏开发中后期高效调整具有借鉴意义。The fracture-vuggy reservoir in Tahe Oilfield is highly inhomogeneous,and the complex oil-water relationship and uneven reserve production in the middle and late development stages will lead to great difficulty in exploring remaining oil.In response to the problem that the existing reserve classification method is not applicable to effective guidance in the fine development of the main area,volume carving method was adopted for reserve recalculation,the accuracy of fracture-cavern carving was improved through attribute optimization,the accuracy of reserve calculation was enhanced by differential assignment of parameter partitioning,the reserve classification criteria were refined according to the fracture-cavern connectivity characteristics and reserve utilization,and the reserves were classified into three categories:unconnected reserve,connected nonproducing reserve and connected producing reserve.Development adjustment measures were taken for different types of reserves,for example,new well deployment and well pattern improvement were mainly adopted for unconnected reserve and connected nonproducing reserve,and injection-production adjustment between wells for connected and producing reserve.Reserve evaluation technology was employed to guide new well deployment and injection-production adjustments.Since 2018,31 new wells have been put into production in Tahe Block 4,and oil-water well adjustment measures were implemented in 25 wells,and the daily oil production was increased from 270 t/d to 700 t/d,showing remarkable comprehensive improvement effect.The research results have implications for efficient adjustment in the intermediate and late stages of fracture-vuggy reservoir development.

关 键 词：缝洞型油藏 连通性 储量评价 开发对策 碳酸盐岩 塔河油田 

分 类 号：TE344[石油与天然气工程—油气田开发工程]