石臼坨凸起西段C区块古近系东三段岩石物理相特征及储层分类评价  

Petrophysical facies characteristics and reservoir classification evaluation of the glutenite reservoir of the E_(3)d^(3)of Paleogene in the Block C,western Shijiutuo Uplift

作　　者：孙藏军 周军良 常涛 舒晓 吴小张 SUN Cangjun;ZHOU Junliang;CHANG Tao;SHU Xiao;WU Xiaozhang(Tianjin Branch of CNOOC(China)Ltd.,Tianjin 300459,China)

机构地区：[1]中海石油(中国)有限公司天津分公司,天津300459

出　　处：《海洋地质前沿》2024年第10期29-38,共10页Marine Geology Frontiers

基　　金：中海石油(中国)有限公司重大项目“渤海中深层复杂油气藏高效开发技术”(CNOOC-KJ135 ZDXM36 TJ03TJ)。

摘　　要：利用岩芯、铸体薄片、扫描电镜、常规物性及动态监测等资料,以渤海C区块东三段砂砾岩储层为靶区,开展沉积相、成岩相及孔隙结构相综合作用下的岩石物理相研究,并基于岩石物理相进行储层分类评价。研究区东三段以扇三角洲前缘亚相沉积为主,发育近岸水道、碎屑流、远岸水道和分流间湾4种沉积微相。成岩相划分为泥/砂质杂基充填相、压实致密相、不稳定组分溶蚀相和碳酸盐胶结相。孔隙结构相划分为大孔粗喉、中孔中喉、大孔细—中喉和小孔细喉。选取储集层品质指数(RQI)值表征不同沉积相、成岩相及孔隙结构相对储层的影响,通过计算储集层岩石物理相的定量参数值,表征不同相的综合作用下对储层物性和产能的影响,并将研究区东三段岩石物理相划分为3类,对应Ⅰ-Ⅲ类储层。利用东三段生产井投产初期所获得的产出剖面测试资料,验证了通过岩石物理相静态参数划分储集层类别的合理性。研究成果可为下一步注采优化调整及潜力调整井位优选提供一定的地质依据。Using core,cast thin sections,scanning electron microscopy,conventional physical properties and dy-namic monitoring data,the petrophysical facies of the glutenite reservoir in the E_(3)d^(3)of the Block C of the Bohai Bay is studied under the comprehensive action of sedimentary facies,diagenetic facies and pore structure phase.The results show that fan-delta front subfacies are the main sedimentary microfacies of the E_(3)d^(3)in the study area,with four types of sedimentary microfacies:near-shore channel,detrital flow,far-shore channel and distributary bay.Diagenetic facies can be divided into mud/sandy mixed base filling phase,compacted dense phase,unstable component dissolution phase and carbonate cementation phase.The pore structure phase can be divided into large pore type,middle pore type,large pore type and small pore type.Reservoir Quality Index(RQI)value was selec-ted to characterize the influence of different sedimentary facies,diagenetic facies and pore structure on the reser-voir.By calculating the quantitative characterization parameter values of the reservoir petrophysical facies,the in-fluence of different facies on the reservoir physical property and productivity was characterized.The petrophysic-al facies of the E_(3)d^(3)in the study area were divided into 3 categories,corresponding to classⅠ-Ⅲreservoirs.Based on the output profile test data obtained in the early production period production well of the E_(3)d^(3)in the study area,the rationality of classifying reservoirs by the static parameters of petrophysical facies is verified.The research results can provide some geological basis for the next step of injection and production optimization and potential adjustment of well location selection in this area.

关 键 词：石臼坨凸起 东三段 岩石物理相 储层分类 

分 类 号：P744.4[天文地球—海洋科学] P618.13