多层水驱油藏层系划分优化及驱油效果预测方法  

Optimization for Subdivision of Multi-layer Water Flooding Oil Reservoirs andPredicting Method for Displacing Efficiency

作　　者：吴义志[1] WU Yi-zhi(Exploration and Development Research Institute,Shengli Oilfield Company,SINOPEC,Dongying 257015,China)

机构地区：[1]中国石化胜利油田分公司勘探开发研究院,山东东营257015

出　　处：《化工管理》2021年第11期197-198,共2页Chemical Engineering Management

基　　金：国家科技重大专项“复杂断块油田提高采收率技术”(2016 ZX05011-002)。

摘　　要：为了缓解多层水驱非均质油藏合注合采水驱前缘指进现象和采出程度不均衡问题,开展了注采层系细分优化及驱油效果预测研究。选取孔隙度、渗透率、地层压力和含油饱和度4个主要油藏参数,利用k-means算法,编制了层系划分的聚类程序,建立了两相渗流数学模型及水驱油前缘和采出程度的解析计算方法,实现层系细分优化效果预测对比。结果表明,该层系划分优化方法可以有效地缓解因层间非均质引起的水驱前缘突进问题。可见层系优化开发可明显改善多层非均质油藏的驱油效果。In order to alleviate the leading edge fingering phenomenon and uneven production degree of water flooding in multi-layer water drive heterogeneous reservoirs,the subdivision optimization of injection production layers and the prediction of oil displacement effect were carried out.Four main reservoir parameters,porosity,permeability,formation pressure and oil saturation,are selected.By using k-means algorithm,the clustering program of stratigraphic division is compiled.The two-phase seepage mathematical model and the analytical calculation method of water flooding front and recovery degree are established.The prediction and comparison of stratigraphic subdivision optimization effect are realized.The results show that this method can effectively alleviate the problem of water drive front outburst caused by interlayer heterogeneity.It can be seen that the optimized development of strata can obviously improve the oil displacement effect of multi-layer heterogeneous reservoir.

关 键 词：多层油藏 层系划分 聚类方法 采出程度 驱油效果 

分 类 号：TE341[石油与天然气工程—油气田开发工程]