摘要
上倾尖灭型油气藏是重要的岩性油气藏类型之一,岩性尖灭边界刻画是论证圈闭有效性的关键。为了提高圈闭刻画的有效性,降低勘探开发的风险,本文提出地质-地球物理相结合的方法综合刻画储层边界。通过西湖凹陷C油田花港组岩心相-测井相-地震相分析、地震沉积学分析、储层构型分析等地质方法开展储层平面展布精细刻画,厘定沉积相类型,定性预测砂体展布规模。在此基础上,采用地震多属性分频融合分析和神经网络聚类分析、波形聚类分析以及砂描解释等多种地球物理技术方法精细落实储层尖灭位置。结果表明,研究区为浅水三角洲沉积,三角洲平原河道宽约1000 m,前缘水下分流河道宽约680 m;利用地震多属性、波形聚类以及砂描解释联合确定了西块三角洲平原河道砂体的边界。
Updip pinch-out reservoir is one of the critical lithologic reservoirs,and the characterization of the pinch-out boundary is the key to proving the validity of the trap.In this paper,a geology-geophysical method is proposed to characterize reservoir boundaries comprehensively,which can improve the effectiveness of trap characterization for dip pinch-out reservoirs and reduce the risk of exploration and development.Through analysis of core,logging facies and seismic facies,seismic sedimentology and reservoir architecture analysis of Huagang Formation in C Oilfield of Xihu sag,this paper studies the plane distribution of reservoir and sedimentary facies,and predicts the scale of sand body qualitatively.Combined seismic multi-attribute frequency division fusion,neural network clustering,waveform clustering and sand description interpretation,the pinch-out position of reservoir boundary is studied.The results show that the study area is a shallow-water delta deposit.The width of delta plain channel is about 1000 m,and the width of underwater distributary channel is about 680 m.The boundary of sand body in delta plain of west block is determined by using seismic multi-attribute,waveform clustering and sand description interpretation.
作者
娄敏
蔡华
何贤科
黄鑫
刘英辉
王伟
Lou Min;Cai Hua;He Xianke;Huang Xin;Liu Yinghui;Wang Wei(Shanghai Branch of CNOOC Ltd.,Shanghai 200335,China;CNOOC Research Institute Co.,Ltd.,Beijing 100028,China)
出处
《吉林大学学报（地球科学版）》
CAS
CSCD
北大核心
2023年第2期622-634,共13页
Journal of Jilin University：Earth Science Edition
基金
国家科技重大专项(2016ZX05027-004)
中海石油(中国)有限公司重大科技专项(CNOOC-KJ135ZDXM39SH03)。
关键词
地质-地球物理综合方法
岩性尖灭
地震沉积学
花港组
西湖凹陷
integrated method of geology and geophysics
lithologic pinching-out
seismic sedimentology
Huagang Formation
Xihu depression
