油气地质与采收率2025，Vol.32Issue(2)：72-80,9.DOI:10.13673/j.pgre.202309039
少井条件下深层单河道内部结构地震综合表征技术
Seismic comprehensive characterization technology for internal structures of deep single channels with few wells
摘要
Abstract
Huagang Formation in offshore A gas field is a large composite channel deposit with horizontal migration and vertical su-perposition of channels.The target layer has a large burial depth,few drilled wells,and poor-quality seismic data.It is difficult to identify the channel sand bodies based on seismic data,and the development accuracy requirements are not supported.Based on the classic channel deposit styles and the characteristics of drilled wells,the seismic responses of different channel deposit styles were clarified by forward modeling technology.On this basis,the composite channel zones were characterized by using strata slice tech-nology,and single channel boundaries were accurately tracked by combining near-angle stacked data volume and far-angle stacked data volume.The Poisson impedance inversion was selected to predict the dominant sand bodies in channels quantitatively.Finally,the seismic comprehensive characterization technology was formed for the internal structures of deep single channels with few wells and stepwise constraints.Based on the characterization results,four wells were deployed in the dominant sand bodies of different channels.The actual drilling confirmed that there were different gas-water interfaces in different channels,indicating that lithologic-structural gas reservoirs formed by multiple channels were developed and have different gas-water systems,which confirmed the re-liability of single channel characterization.All four wells have achieved an average high gas yield of 20×104 m3/d after production,which further confirmed the accuracy of dominant sand body characterization.This method strongly supports the development and adjustment of the gas field,and the geological reserves and daily gas production of natural gas have achieved breakthroughs.关键词
地震响应特征/复合河道沉积/分角度叠加数据体/单河道识别/泊松阻抗反演/优势砂体定量预测Key words
seismic response characteristic/composite channel deposit/stacked data volume by angle/signal channel identification/Poisson impedance inversion/quantitative prediction of dominant sand body分类
石油、天然气工程引用本文复制引用
王健伟,雷蕾,孙莉,刘梦颖,吴文雯,刘舒..少井条件下深层单河道内部结构地震综合表征技术[J].油气地质与采收率,2025,32(2):72-80,9.基金项目
中国石油化工股份有限公司科技项目"西湖凹陷巨厚气藏描述及开发技术政策研究"(P23056). （P23056）
