油水相对渗透率曲线预测模型建立及应用  

The Establishment and Application of Prediction Model for Oil-water Relative Permeability Curve

作　　者：王守磊 李治平[1] 耿站立 张纪远[3] 徐世乾 WANG Shou-lei;LI Zhi-ping;GENG Zhan-li;ZHANG Ji-yuan;XU Shi-qian(School of Energy Resources,China University of Geosciences （Beijing）, Beijing 100083,China;CNOOCResearch Institute,Beijing 100028,China;School of Petroleum Engineering, China University of Petroleum （East China）,Qingdao 266580,China)

机构地区：[1]中国地质大学(北京)能源学院,北京100083 [2]中海油研究总院,北京100028 [3]中国石油大学(华东)石油工程学院,青岛266580

出　　处：《科学技术与工程》2018年第12期52-59,共8页Science Technology and Engineering

基　　金：国家科技重大专项(2016ZX05016-006-006)资助

摘　　要：油水相对渗透率曲线是油藏数值模拟中提高历史拟合精度和准确预测开发指标的关键参数。数值模拟中不同储层物性采用不同的相对渗透率曲线是十分必要的。以目标油田具有代表性的52条非稳态油水相对渗透率曲线为样本,利用交替条件期望方法,建立了束缚水饱和度、残余油饱和度、束缚水下油相渗透率和残余油下水相渗透率等端点值模型,结合油藏归一化平均相对渗透率曲线,形成了油水相对渗透率曲线预测模型。基于所建立的预测模型,可以得到目标油田不同储层物性对应的相对渗透率曲线,并应用于历史拟合过程中。历史拟合结果表明,历史拟合精度尤其是含水率急剧变化段的拟合精度有明显提高。该预测模型可广泛应用于相渗资料丰富的老油田的历史拟合和指标预测过程中,同时也为相对渗透率曲线网格化奠定了基础。Oil water relative permeability curve is the key parameter to improve the accuracy of history match and to forecast the development law in reservoir simulation. Taking 52 unsteady state oil water reative permeability curves as the sample,the end point models for irreducible water saturation,residual oil saturation,oil permeability at irreducible water saturation and water permeability at residual oil saturation are established respectivly by alternating conditional expectation method. Combining with the reservoir normalized average relative permeability curve,the prediction model of oil water relative permeability is developed. Based on the porosity and air different regions in the target oil filed,the oil water relative permeability curves of different regions can be obtained by the prediction model. The field result shows that the fitting accuracy of history match,especially the fitting accuracy of the sharply changing section of the water cut,is obviously improved. The prediction model has important guiding significance for the study of the history match and development index prediction of the old oilifield with rich oil-water relative permeability data,and provides a theoretical basis for the gridding of relative permeability curves.

关 键 词：相对渗透率曲线 交替条件期望 预测模型 数值模拟 

分 类 号：TE341[石油与天然气工程—油气田开发工程]