基于有效驱替通量的油藏物性综合时变数值模拟技术及应用  

A comprehensive reservoir simulation technique based on time-varying petro-physical parameters characterized by effective displacement flux

作　　者：赵平起[1] 沈泽阳 蔡明俊[1] 张家良[1] 姜瑞忠[3] 赵明[1] 芦风明 李晓良[1] 何书梅[1] 李佩敬[1] ZHAO Pingqi;SHEN Zeyang;CAI Mingjun;ZHANG Jialiang;JIANG Ruizhong;ZHAO Ming;LU Fengming;LI Xiaoliang;HE Shumei;LI Peijing(Dagang Oilfield Company, PetroChina, Tianjin 300280, China;Tianjin Branch of CNOOC (China) Limited, Tianjin 300451, China;School of Petroleum Engineering in China University of Petroleum (East China), Qingdao 266580, China)

机构地区：[1]中国石油大港油田公司,天津300280 [2]中海石油(中国)有限公司天津分公司,天津300451 [3]中国石油大学(华东)石油工程学院,山东青岛266580

出　　处：《中国石油大学学报（自然科学版）》2022年第1期89-96,共8页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家科技重大专项(2016ZX05010-005-005,2018E-11-06)。

摘　　要：水驱开发油田进入高含水期后在水的高倍冲刷下储层物性不断发生变化,影响储层剩余油分布与调控策略的制定。为精确模拟储层时变条件下剩余油的分布状况,根据室内试验和矿产资料利用有效驱替通量定量表征储层物性参数的时变规律,并形成基于驱替通量的时变数值模拟技术。建立概念模型对时变软件进行应用,分析不同时变参数对开发效果和剩余油分布的影响。结果表明渗透率时变水窜加剧,开发效果变差;原油黏度时变水油流度比降低,黏性指进导致波及系数和洗油效率变差;相渗曲线时变油相渗流能力升高,有利于驱油;综合时变是各参数时变共同作用的结果,开发效果整体趋好。B油田考虑储层物性时变后,数值模拟历史拟合精度提高约7%。该技术可连续稳定地表征水驱开发时储层物性的动态变化,确保剩余油分布模拟结果的可靠性,为油田后期深度挖潜奠定基础。During water flooding process,the physical properties of the reservoir can be changed due to high water erosion,which can affect the distribution of the remaining oil.In this study,in order to accurately simulate the distribution of the remaining oil under time-varying reservoir conditions,an effective displacement flux was used to quantitatively characterize the time-varying behavior of the petro-physical parameters based on laboratory experiments and mineral data of the reservoir rocks,and to form a new reservoir simulation technique based on a time-varying petro-physics model.A conceptual model was established using the time-varying model to analyze the impact of different time-varying parameters on the distribution of the remaining oil.The results show that,when the permeability changes with time,more water channeling can occur,inducing a negative effect on oil production.If the viscosity of the crude oil increases during water injection,the water-to-oil mobility ratio will decrease,resulting in viscosity fingering and poor displacement and sweeping efficiency.On the other hand,if the relative permeability of oil phase increases with time,the mobility of oil phase will increases,which is conducive to oil displacement.The results of a case study for an oil block indicate that the accuracy of history matching using the new model can be improved by over 7%after the time-varying petro-physical properties were considered.The new reservoir simulation technique can continuously characterize the dynamic changes of the important petro-physical properties during water flooding,which can increase the reliability of the simulation results on remaining oil distribution,and provide useful guidelines for further production optimization.

关 键 词：水驱开发 储层物性时变 数值模拟 驱替通量 剩余油 

分 类 号：TE341[石油与天然气工程—油气田开发工程]