北部湾盆地复杂地层水矿化度特征及流体识别  

Mineralization characteristics and fluid identification of complex formation water in Beibu Gulf Basin

作　　者：吴健 刘土亮 张恒 舒克栋 杨冬 王建军 WU Jian;LIU Tuliang;ZHANG Heng;SHU Kedong;YANG Dong;WANG Jianjun(Zhanjiang Branch Company,CNOOC(China)Co.,Ltd.,Zhanjiang 524057,Guangdong,China;Oil&Gas Production Engineering Service Center of Henan Oilfield Company,SINOPEC,Nanyang 473132,Henan,China)

机构地区：[1]中海石油(中国)有限公司湛江分公司,广东湛江524057 [2]河南油田分公司采油气工程服务中心,河南南阳473132

出　　处：《石油地质与工程》2024年第1期70-73,78,共5页Petroleum Geology and Engineering

基　　金：中海油集团公司“十四五”国家重大科技专项“近海重点潜在富烃洼陷评价技术”(KJGG2022-0301)。

摘　　要：北部湾盆地地层水矿化度分布规律复杂多变,受多种因素控制,难以进行储层流体识别和测井饱和度评价。通过数据统计,明确地层水矿化度纵横向的分布规律和特征,并从原始沉积环境、地表水淋滤、地层超压与油气运聚模式、断层错断等多种因素开展分析,探讨影响本区地层水矿化度的主要因素。针对地层水性质多变和油水关系复杂的断块油藏,利用岩心半渗透隔板和核磁共振实验得到岩心束缚水饱和度,同时对测井含水饱和度进行标定,并结合测压取样和地层测试结果了解区域地层水矿化度分布特征,该成果可为区域新钻井各层组地层水矿化度的确定提供参考,提高了测井解释符合率和地层含油饱和度的评价精度。The distribution pattern of formation water mineralization in Beibu Gulf Basin is complex and variable,and it is controlled by various factors,making it difficult for fluid identification and logging saturation evaluation.Through data statistics,the distribution pattern and mineralization characteristics in both vertical and horizontal directions are clarified,and various factors such as original sedimentary environment,surface water leaching,formation over pressure and oil and gas migration and accumulation patterns,fault faulting,etc.are analyzed to explore the main factors affecting the mineralization in this area.For fault block oil reservoirs with variable properties and complex oil-water relationships,the bound water saturation of the core was obtained using semi permeable barriers and nuclear magnetic resonance experiments.Meanwhile,the water saturation of logging is calibrated,and the distribution pattern is obtained based on pressure sampling and formation testing.The results provide a good reference for the formation water mineralization in each formation of new drilling,and improve the coincidence rate of logging interpretation and the evaluation accuracy of formation oil saturation.

关 键 词：北部湾盆地 地层水矿化度 分布规律 含水饱和度 电阻率下限 

分 类 号：TE124.2[石油与天然气工程—油气勘探]