地震沉积学在苏里格49区块176三维区薄储层中的应用  

Seismic sedimentary analysis of lower submember of He 8 member in Su 49 block

作　　者：邵映明 李国良 房金伟 林倩 焦煦 张泽 SHAO Ying ming;LI Guo liang;FANG Jin wei;LIN Qian;JIAO Xu;ZHANG Ze(OIL&Gas Cooperation and development Company,BHDC,Tianjin,300457,China)

机构地区：[1]中国石油集团渤海钻探工程有限公司油气合作开发分公司,天津300457

出　　处：《内蒙古石油化工》2023年第11期106-111,共6页Inner Mongolia Petrochemical Industry

摘　　要：苏49区块位于苏里格西区西部,以薄互层储集层为主,现有三维地震资料主频较低,无法满足沉积相精细刻画需求。通过地震沉积学分析表明,研究区盒8下亚段发育由北向南的辫状河沉积体系,东西两侧各发育一条主河道,中间发育2-4条分支河道。沉积早期水动力能量波动大、沉积物供给不稳定,砂体单层厚度薄、泥质夹层多;晚期水动力能量强,沉积物供给丰富,砂体厚度大、岩性纯、物性好,形成相对优质的储集层。Su 49 block is located in the western part of Sulige gas field,mainly in thin interlayer reservoirs,and the main frequency of the existing three-dimensional seismic data is too low to meet the needs of fine depiction of sedimentary facies.According to the analysis of seismic sedimentology,The results show that the lower submember of He 8 member in the study area develops a braided river sedimentary system from north to south,with two main river channels developing on the east and west sides,2~4 branch rivers developing in the middle.In the early stage of sedimentation,the hydrodynamic energy fluctuated greatly,the sediment supply was unstable,the single layer of sand was thin,and there were many slurry sandwiches;In the late stage,the hydrodynamic energy is strong,the sediment supply is abundant,the sand body thickness is large,the lithology is pure,and the physical properties are good,forming a relatively high-quality reservoir.

关 键 词：地震沉积学 薄互层储层 频谱分解 地层切片 

分 类 号：P631.4[天文地球—地质矿产勘探] P512.2[天文地球—地质学]