石油物探2024，Vol.63Issue(1)：30-44,15.DOI:10.12431/issn.1000-1441.2024.63.01.003
东海OBN和三维DAS-VSP数据的联合采集与处理方法研究
Joint OBN and 3D DAS-VSP data acquisition and processing in East China Sea
摘要
Abstract
Optical fiber sensing has been applied to surface,marine,and borehole seismic acquisition and joint borehole-surface seis-mic acquisition in the latest years.Surface or marine seismic and VSP seismic exploration could be combined to achieve 3D prospec-ting.Using 3D DAS-VSP data,we could obtain accurate time-depth relationship,interval velocity,deconvolution operator,compen-sation factor of spherical spreading,absorption attenuation factor,anisotropy parameters,and high-resolution structure imaging a-round the well bore;above parameters could be used to enhance 3D well-driven land or marine seismic data processing.In this work we performed 3D DAS-VSP data processing and imaging.The 3D DAS-VSP survey was acquired using a downhole armored optical cable with simultaneous OBN data acquisition in the East China Sea.The routine workflow of 3D DAS-VSP data processing includes geometry definition,preprocessing,first break picking,static correction,amplitude compensation,deconvolution,wave field separation,velocity analysis and modeling,and structure imaging using upgoing waves.A new technique of downgoing multiple re-flection imaging is developed to enlarge the migration aperture and imaging area of upgoing reflected waves and obtain better quali-ty of imaging.Compared with 3D vintage OBC data imaging,3D DAS-VSP downgoing multiple imaging yields better results within a large area around the well bore;OBN and 3D DAS-VSP imaging yields better results for high-resolution structure interpretation and fluid detection.Owing to high efficiency and low cost of joint borehole-marine acquisition,it is possible to accomplish fast 3D DAS-VSP imaging and enhanced well-driven resolution processing of 3D marine seismic data.Besides,3D OBN or OBC data and 3D DAS-VSP data could be processed together for joint borehole-surface or borehole-marine migration to significantly improve the im-aging quality of 3D marine seismic data.关键词
光纤/分布式/DAS-VSP/OBN/OBC/联采/多次波偏移Key words
optical fiber/distributed/DAS-VSP/OBN/OBC/joint acquisition/multiple migration分类
天文与地球科学引用本文复制引用
张少华,王熙明,王艳华,苟量,余刚,刘海波,张昊,曹中林,陈沅忠,何光明,吴俊军..东海OBN和三维DAS-VSP数据的联合采集与处理方法研究[J].石油物探,2024,63(1):30-44,15.基金项目
中石油集团重大科技专项(2023ZZ05)资助.This research is financially supported by the CNPC Science and Technology Department Project(Grant No.2023ZZ05). 感谢上海石油天然气有限公司允许发布数据和BGP与中油奥博(成都)科技有限公司为本项目在数据采集和处理阶段提供支持和指导,以及BGP"井中DAS-VSP关键技术研究"(06-01-2021)科研项目和中国石油研究项目"井下光纤智能监测项目(2020F-44)"的大力支持. （2023ZZ05）
