摘要
薄层边底水油藏生产井来水关系复杂,投产后含水率迅速上升,无水采收率低,产量递减快,最终采收率低。以陆梁油田陆9井区呼二三油藏为例,在对全区历史拟合的基础上,建立了概念模型,采用正交试验方法研究了薄层边底水油藏水淹模式的参数敏感性及油水分布特征,结合全区数值模拟结果及动态资料,将该类油藏水淹模式分为注入水加强底水水淹型、注入水窜进水淹型、底水锥进水淹型、边水侵入水淹型和复合水淹型5类,并分析了各种水淹模式的指标界限。应用水淹模式指标界限对研究区50口生产井进行水淹分析,经现场分析及数值模拟验证,准确率达84.8%。
Thin-layered reservoirs with edge and bottom water are rare home and abroad. The water intrusion to oil well in this kind reservoir is very complex. The water cut of the oil well increases fast after the well is put into production, and the recovery factor is low. The production rate declines rapidly, and the ultimate recovery ratio is also very low. Taking K1h23 reservoir of Lu9 wellblock in Luliang oil field as an example, a concept model is built on the base of the whole region history matching. An orthogonal test is introduced to study the sensitive parameters and the water/oil distribution feature of water flooding pattern of the thin-layered reservoir with edge and bottom water. According to the numerical modeling result and dynamic documents of the whole region, five kinds of water flooding patterns are classified, which are injecting water enhanced bottom, injecting water cross-flow, bottom water coning, edge water intruding and compounding. And, the target boundary is given to the patterns. It is presented by the field application that the target boundary is reliable and it can be supplied as the theoretic foundation for the water/oil control measures for this kind of reservoir in the middle and later stage.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2012年第5期91-93,117,共3页
Petroleum Geology and Recovery Efficiency
基金
中国石油科技部攻关项目"新疆陆梁陆9井区立体综合调整方案研究"(070123-7)
关键词
薄层
边底水油藏
数值模拟
正交试验
水淹模式
thin-layered
edge and bottom water
numerical simulation
orthogonal test
water flooding pattern
