石油地球物理勘探2025，Vol.60Issue(3)：775-782,8.DOI:10.13810/j.cnki.issn.1000-7210.20240267
针对"亮点型"砂岩储层的叠后相对振幅解耦流体检测方法及应用
Fluid detection method based on post-stack relative amplitude decoupling for"bright spot"sandstone reservoirs and its application
摘要
Abstract
Clastic rock reservoirs are widely distributed in the Barbados accretionary wedge basin with the pri-mary reservoir type of deepwater turbidite sandstone and the hydrocarbon type of biogas reservoir.Since gas-bearing sandstones and water-bearing sandstones in the basin are both presented as"bright spot"anomalies in seismic data,it is difficult for conventional post-stack hydrocarbon detection methods to accurately predict the distribution of gas reservoirs,which leads to a low success rate of early exploration.Thus,after analyzing log-ging response characteristics of drilled reservoirs,this paper proposes a new fluid detection method based on post-stack relative amplitude decoupling for"bright spot"sandstone reservoirs.Firstly,the main controlling factors of the seismic response of reservoirs are quantitatively analyzed by means of fluid substitution and forward mo-deling.Secondly,the post-stack relative amplitude decoupling factor is designed for"bright spot"sandstone reservoirs,and the relative amplitude relationship template is established for different lithologies and fluids.Fi-nally,gas-bearing sandstones and water-bearing sandstones are distinguished utilizing the relative amplitude re-lationship template to realize reservoir prediction and fluid detection with multi-age post-stack seismic data.The application results show that the new methodology has a stronger ability to distinguish gas-bearing sandstones and water-bearing sandstones in the study area,which overcomes the blind area of traditional post-stack hydro-carbon detection methods,significantly improves the prediction accuracy of biogas reservoirs,and provides an important basis for exploration decision.关键词
油气检测/叠后地震/相对振幅/方差/生物气Key words
hydrocarbon detection/post-stack seismic/relative amplitude/variance/biogas分类
天文与地球科学引用本文复制引用
王嘉,尹川,李爱山,陈亮,孔国英..针对"亮点型"砂岩储层的叠后相对振幅解耦流体检测方法及应用[J].石油地球物理勘探,2025,60(3):775-782,8.基金项目
本项研究受中国海洋石油集团有限公司"十四五"重大科技项目"‘两岸一带’重点区勘探开发地球物理关键技术"(KJGG2022-0903)资助. （KJGG2022-0903）
