连通导电模型参数确定及其在白云岩储集层评价中的应用  

Parameters of Connected Conducting Model and Its Application in Dolomite Reservoir Evaluation

作　　者：谢芳[1] 蔡德洋[2] 刘瑞林[1] 张承森[2] 冯程 XIE Fang;CAI Deyang;LIU Ruilin;ZHANG Chengsen;FENG Cheng(School of Geophysics and Petroleum Resources,Yangtze University,Wuhan,Hubei 430100,China;Research Institute of Exploration and Development,Tarim Oilfield Company,PetroChina,Korla,Xinjiang 841000,China;School of Petroleum,Karamay Campus,China University of Petroleum(Beijing),Karamay,Xinjiang 834000,China)

机构地区：[1]长江大学地球物理与石油资源学院,武汉430100 [2]中国石油塔里木油田分公司勘探开发研究院,新疆库尔勒841000 [3]中国石油大学(北京)克拉玛依校区石油学院,新疆克拉玛依834000

出　　处：《新疆石油地质》2022年第1期92-101,共10页Xinjiang Petroleum Geology

基　　金：国家自然科学基金(42004089)。

摘　　要：以白云岩储集层物性、岩电、CT扫描、核磁共振和薄片分析资料为基础,提出了一种确定储集层临界含水孔隙度、临界含水饱和度、临界导通指数等连通导电模型参数的方法。将计算得到的临界含水饱和度与T_(2)截止值、渗透率、CT扫描和薄片分析结果进行对比,并将临界导通指数与胶结指数进行对比,分析了临界含水饱和度、临界含水孔隙度及临界导通指数的物理意义。将岩心样品的连通导电饱和度理论曲线与阿尔奇饱和度理论曲线进行对比,分析了连通导电公式与阿尔奇公式计算结果的差别。最后,根据确定的连通导电模型参数,利用连通导电公式计算了2口井白云岩储集层的含水饱和度,计算结果与试油结论一致。Based on reservoir physical properties and the data of rock electricity,CT scan,nuclear magnetic resonance and thin slices,a method for determining the parameters of a connected conducting model is proposed for studying dolomite reservoirs,including the critical water-filled porosity,critical water saturation and critical conductivity index.Then the calculated critical water saturation is compared with the T_(2) cut-off value,permeability,CT scan photos and thin slice analysis results,the critical conductivity index is compared with the cementation index,and the physical meanings of critical water saturation,critical water-filled porosity and critical conductivity index are discussed.The theoretical saturation curves from connected conduction is compared with the theoretical saturation curves from Archie’s formula,and the difference between them is discussed.Finally,according to the determined parameters of the connected conducting model,the water saturations of the dolomite reservoir in two wells are calculated using the connected conductance formula and the calculated results are consistent with formation test results.

关 键 词：白云岩储集层 连通导电模型 阿尔奇模型 临界导通指数 临界含水孔隙度 临界含水饱和度 

分 类 号：TE311[石油与天然气工程—油气田开发工程]