基于Xu-White模型的叠前AVO优化反演在深海浊积储层应用  

Application of Pre-stack optimized AVO inversion based on Xu-White model in the deep sea turbidite reservoir

作　　者：刘庆文 胡伟 李琴 LIU Qingwen;HU Wei;LI Qin(Shanghai Branch of CNOOC Co.,Ltd.,Shanghai 200030,China)

机构地区：[1]中海石油(中国)有限公司上海分公司研究院,上海200300

出　　处：《矿产勘查》2023年第2期214-222,共9页Mineral Exploration

基　　金：中国海油“七年行动计划”东海专项课题(西湖凹陷西部地区勘探开发关键技术研究(CNOOCKJ 135 ZDXM39 SH01));中国海洋石油有限公司“十四五”重大科技项目“海上深层/超深层油气勘探技术”(KJGG2022-0402)联合资助。

摘　　要：Glengorm区上侏罗统砂层组Freshney油气资源富集,储层精细刻画是其难点,主要包含两方面:(1)目的层段砂、泥岩阻抗叠置,而受制于测井资料品质,叠前Vp/Vs弹性信息辨识岩性能力较弱;(2)地震资料频带窄、信噪比S/N较低,导致常规反演手段难以有效刻画储层,气层预测难度大。对此,本文首先应用Xu-White岩石物理建模方法,正演分析弹性参数并优化Vp/Vs辨识岩性能力;其次,在叠前AVO反演流程上提出统计性子波解决常规反演砂体预测精度较低问题;最后,利用FFP岩相流体识别技术完成Freshney气层精细刻画。靶区应用表明:该项技术较好地解决了Freshney储层流体刻画难等问题,对英国北海盆地深海浊积砂岩精细刻画具有一定的借鉴意义。The Late Jurassic Freshney formation of Glengorm is abundant with oil resourse,however,it’s difficult to elaborate reservoir characterization.Firstly,the sand and mudstone in main formation are overlapped with impedance and the Vp/Vs parameter is weak in lithology identification due to the poor quality of logging data.Meanwhile,for the narrow seismic frequency and low S/N ratio,traditional inversion is difficult to characterize sand from mudstone and predict the gas reservoir.As for these problems,Xu-White rock physical modeling method is used to analyze the elastic parameters and optimize the lithology identification ability of Vp/Vs.Secondly,statistical wavelet is proposed to solve the low prediction accuracy problem in conventional inversion.Finally,FFP fluid identification technology is used to characterize the Freshney gas reservoir.The application shows this technique can solve the lithology and fluid identification of Freshney,and has certain significance for the fine characterization of deep-sea turbidite sandstone in the North Sea basin of the United Kingdom.

关 键 词：XU-WHITE模型 叠前AVO反演 FFP分析 储层刻画 流体识别 

分 类 号：P631.4[天文地球—地质矿产勘探]