海上拖缆窄方位地震数据裂缝预测方法

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万方数据
维普

中文摘要：由于受勘探成本和作业效率的影响,海上油气勘探地震数据主要以拖缆采集为主.海上拖缆采集的地震数据方位角较窄,在后续利用方位各向异性进行裂缝性储层预测中存在较大困难.为了解决上述难题,本文针对常规海上窄方位拖缆数据,建立了一套基于叠前成像处理和叠前各向异性反演的裂缝预测方法及技术流程,包括局部角度域偏移成像方法和基于HTI模型Rüger近似公式的叠前各向异性反演方法.首先,采用局部角度域全方位偏移成像方法对窄方位拖缆地震数据进行叠前成像处理,获得具有方位信息的叠前道集数据.然后,利用叠前各向异性参数反演方法实现储层裂缝发育强度的预测.最后,将本文提出的方法及技术流程应用到南海北部深水区潜山油气藏的裂缝性储层描述中.实际工区裂缝预测结果验证了方法技术在海上拖缆窄方位地震数据裂缝预测中的可行性和有效性.文中提出的针对海上拖缆窄方位地震数据裂缝预测方法及技术流程可以在类似工区的裂缝性储层描述中进行推广应用.

外文标题：Fracture prediction method for narrow-azimuth seismic data of offshore streamer acquisition

外文摘要：Considering the constraints in the costs and efficiency of seismic exploration acquisition,marine hydrocarbon exploration mainly relies on towed-streamer acquisition.However,the seismic data obtained from streamers have limited azimuthal coverage,posing significant challenges for the prediction of complex fractured reservoirs using azimuthal anisotropy features.To address this issue,we proposed a workflow for conventional offshore narrow-azimuth streamer data,including the local angle domain migration imaging and prestack anisotropy inversion methods based on the Rüger approximation equation.First,the local angle domain full-azimuth migration imaging method is used to perform prestack imaging processing on narrow-azimuth streamer seismic data,thus obtaining prestack gather data with azimuth information.The prestack anisotropy parameter inversion method is then used to predict the fracture intensity distribution.Finally,the method and technical process proposed in this paper are applied to the fractured reservoir description of buried hills reservoirs in the deepwater area of the northern South China Sea.The practical results demonstrate that the proposed workflow,which combines full-azimuth migration imaging processing and prestack azimuthal anisotropy parameter inversion,can accurately predict fractured reservoirs using narrow-azimuth seismic data acquired through marine towed-streamer surveys.This technical workflow is also applicable to fracture predictions and reservoir evaluations in similar seismic survey areas.

外文关键词：

Streamer datanarrow azimuthlocal angle domainfracture predictionanisotropy inversion

作者：

刘道理、杨学奇、邹雅铭、刘徐敏、王国权、陈双全

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作者单位：

中海石油深海开发有限公司,深圳 518054

中国石油大学(北京)油气资源与工程全国重点实验室,CNPC物探重点实验室,北京 102249

关键词：

拖缆数据窄方位局部角度域裂缝预测各向异性反演

基金：

National Natural Science Foundation of ChinaNational Key Research and Development ProgramBasic Experiment and Advanced Theoretical Method Research of Geophysical Exploration Application

项目编号：

421741302018YFA07025012022DQ0604-03

出版年：

2024

DOI：

10.1007/s11770-024-1077-8

应用地球物理(英文版)

中国地球物理学会

应用地球物理(英文版)

影响因子：1.01

ISSN：1672-7975

年,卷(期)：2024.21(1)

参考文献量36