华池—南梁油田长8油藏高阻水层解释方法  

Interpretation Methods for High-Resistivity Water Layer in Chang 8 Reservoir in Huachi-Nanliang Oilfield

作　　者：张德梅 段朝伟 李高仁[3] 李永胜[3] 陆敬武 林伟川 ZHANG Demei;DUAN Chaowei;LI Gaoren;LI Yongsheng;LU Jingwu;LIN Weichuan(Changqing Branch,China National Logging Corporation,Xi’an,Shaanxi 710200,China;Geological Research Institute,China National Logging Corporation,Xi’an,Shaanxi 710077,China;Research Institute of Exploration and Development,Changqing Oilfield Company,PetroChina,Xi’an,Shaanxi 710018,China;Materials and Equipment Company,China National Logging Corporation,Xi’an,Shaanxi 710200,China)

机构地区：[1]中国石油集团测井有限公司长庆分公司,西安710200 [2]中国石油集团测井有限公司地质研究院,西安710077 [3]中国石油长庆油田分公司勘探开发研究院,西安710018 [4]中国石油集团测井有限公司物资装备公司,西安710200

出　　处：《新疆石油地质》2023年第1期105-111,共7页Xinjiang Petroleum Geology

基　　金：国家科技重大专项(2016ZX05050,2017ZX05001002-008);中国石油科技重大专项(2016E-0501)。

摘　　要：鄂尔多斯盆地华池—南梁油田长8油藏存在高阻水层,油水层对比度低,油层识别难度大。为提高油层判识率,以大量测井、录井资料和岩石物理实验为基础,确定油藏水层高阻的主控因素。根据不同类型高阻水层测井响应特征,利用中子、密度和声波时差测井数据,评价孔隙结构,识别复杂孔隙结构型高阻水层;利用中子—密度曲线交会特征进行电性因子校正,扩大油水流体特征,有效识别复杂润湿型高阻水层。通过对不同主控因素高阻水层测井响应特征研究,采用相应测井技术方法有效识别,提高图版油水特征值的准确度和测井解释符合率。In the Chang 8 reservoir in Huachi-Nanliang oilfield of the Ordos basin,high-resistivity water layers are present,and the contrast between oil and water layers is low,making it difficult to identify oil layers. In order to accurately identify oil layers,based on logging data and petrophysical experiment results,the controlling factors of the high resistivity of water layers were determined. According to the logging response characteristics of different types of high-resistivity water layers,by using the data of neutron,density and acoustic logging,the pore structure in the reservoir was evaluated to identify high-resistivity water layers with complex pore structures. By using the crossplot of neutron and density logging curves,resistivity was corrected,so as to enlarge the contrast between oil and water layers,and then to effectively identify high-resistivity water layers with complex wettability. Based on the analysis of the logging responses of high-resistivity water layers controlled by different factors,different techniques and methods were adopted to effectively identify these layers,and the accuracy of oil-water characteristic values in identification chart and the coincidence rate of logging interpretation have been improved.

关 键 词：高阻水层 主控因素 孔隙结构 润湿性 测井响应特征 油水识别 解释符合率 

分 类 号：TE122.3[石油与天然气工程—油气勘探]