钻井液侵入对储层电阻率影响的数值模拟与实验研究  

On Drilling Fluid Invasion Influence on Resistivity Logging Characteristics by Numerical Modeling and Experimental Method

作　　者：王敏[1] 李万才[1] 冯雪[2] 唐志远 刘国昌[4] 

机构地区：[1]中国石化东北油气分公司勘探开发研究院,吉林长春130062 [2]空军航空大学基础基地基础部数学教研室,吉林长春130000 [3]中海油能源发展工程技术研究院,天津300457 [4]中国石油大学(北京)地球物理与信息工程学院,北京102249

出　　处：《测井技术》2015年第3期272-276,共5页Well Logging Technology

基　　金：中国石油科技创新基金项目(2013D-5006-0303)资助

摘　　要：研究钻井液侵入地层的过程,可进一步确定地层水矿化度、地层电阻率和含水饱和度的径向分布,为储层识别和评价提供依据。采用数值模拟和物理实验相结合的方法,研究钻井液动态侵入条件下,地层电阻率与地层岩性、流体以及测井时间的关系。数值模拟方面,采用多孔介质两相渗流模型、不同矿化度流体对流传递模型和阿尔奇公式,计算不同条件下侵入剖面上电性和流体参数的径向分布特征;物理模拟方面,采用全直径长岩心测试系统进行实验,对钻井液固液相在不同物性岩心的侵入深度、侵入程度、侵入速度特征进行研究。理论模拟和实验结果吻合较好,该数值模拟方法能较好模拟钻井液动态侵入对储层电阻率影响。Drilling fluid invasion also results in rock sections ot different permeability anu resistivity parameters. As a result, study on drilling fluid invasion process can help us correctly determine formation salinity, resistivity and water saturation distribution, thereby offering a credible base and method for logging geological analysis. We detail drilling fluid invasion mechanism by numerical simulation and laboratory experiment. Firstly, the factors affecting drilling fluid invasion are analysed and the radial distribution characteristics of resistivity and saturation on the mud filtrate invaded profile are calculated by using the two phases fluid model in multi-pore media, the convective transport model between the fluids of difference mineralization intensity and Archie equation. Then a laboratory experiment is introduced to simulate drilling fluid invasion process in deviated wells. Finally, based on resistivity logging response characteristics of drilling fluid, we propose a logging eigen function identification method and a suit of models for classification parameters interpretation to effectively identify reservoir. It gets obvious effect which is coincident with experimental results.

关 键 词：岩石物理实验 钻井液 侵入机理 电阻率变化 数值模拟 

分 类 号：P631.84[天文地球—地质矿产勘探] TE122.1[天文地球—地质学]