高角度裂缝型储层叠前反演方法及在渤中26-6油田中的应用  

Pre-stack inversion method for high-angle fracture reservoir and its application in the Bozhong 26-6 oilfield

作　　者：黄江波 秦德海 吕振宇 侯栋甲 HUANG JiangBo;QIN DeHai;LZhenYu;HOU DongJia(Bohai Oil Research Institute,Tianjin Branch,CNOOC Ltd.,Tianjin 300452,China)

机构地区：[1]中海石油(中国)有限公司天津分公司渤海石油研究院,天津300452

出　　处：《地球物理学进展》2025年第1期349-357,共9页Progress in Geophysics

基　　金：中国海洋石油有限公司重大科技项目“潜山油气成藏理论与勘探关键技术”(KJGG2022-0302);黑龙江省自然科学基金(HL2021D008,YQ2021D007)联合资助.

摘　　要：渤海太古宇变质岩潜山裂缝型储层纵横向变化快,储层非均质性强,裂缝储层的有效预测在该类油田开发中起着至关重要的作用.不同于常规碎屑岩储层,裂缝型储层发育受断裂控制,呈高角度地震反射特征,空间分布具有极强的非均质性,传统的叠前反演不能准确刻画该类储层分布特征.为此,提出高角度裂缝型储层的叠前反演方法:首先对原始地震数据开展基于灰度共生矩阵的纹理分析,提取反映裂缝储层响应的地震高角度反射信息,将其与常规叠前反演的低频模型相融合,构建出适应太古宇潜山强非均质性储层的低频模型,进而开展精细叠前反演.将地震高角度反射约束建模的叠前反演应用于渤中26-6油田,结果表明该技术改善了变质岩潜山内幕反演效果,提高了潜山裂缝储层预测精度,为油田开发井部署提供了可靠的依据.For Bohai metamorphic buried hill,with the characteristics of rapid vertical and horizontal velocity change and strong reservoir heterogeneity,the prediction of fracture reservoir plays a crucial role in the oilfield development.Conventional fracture prediction methods are difficult to accurately predict the buried hill fracture reservoir.A new pre-stack inversion method for high-angle fracture reservoir is proposed in this paper.The method firstly carries out texture analysis based on gray level co-occurrence matrix on the original seismic data,extracts the seismic high-angle reflection information reflecting the response of the fracture reservoir,and integrates it with the low-frequency model of conventional pre-stack inversion to construct a low-frequency model suitable for the strong heterogeneous reservoir in the buried hill of the Archean space,and then carries out fine pre-stack inversion.In this paper,the method is applied to the prediction of fracture reservoir in Bozhong 26-6 oilfield.The results show that the method can improve the inversion effect and the prediction accuracy of fractured reservoir in Bozhong 26-6 oilfield,and provide a reliable basis for the deployment of development wells in Bozhong 26-6 oilfield.

关 键 词：太古宇潜山 变质岩 裂缝储层 高角度反射 叠前反演 

分 类 号：P631[天文地球—地质矿产勘探] P738[天文地球—地质学]