摘要
随着海底地震(Ocean Bottom Seismic,OBS)采集方式的不断发展,海洋地震数据方位角分布更宽,地震资料信息量大、空间连续性好,为准确预测储层中裂缝发育带提供了优质的数据基础,但是目前海底地震数据宽方位属性的应用基本停留在成像阶段,没有充分挖掘OBS宽方位数据的潜力。基于海底地震数据(OBS)地震资料炮检距矢量片(Offset Vector Tile,OVT)域成像,对纵波在复杂构造区振幅方位各向异性特征进行分析,根据振幅随方位角变化预测裂隙发育方向和密度的基本原理,开展地震裂缝检测技术研究攻关,并针对渤中、南海等工区OBS三维地震纵波资料OVT域进行处理,获得6个方位地震数据体,应用最小二乘拟合算法,计算出了该工区的裂隙的发育密度与发育方向,为后期裂缝型油气藏的钻探与开发方案的设计提供了一定依据。
With the continuous development of ocean bottom seismic(OBS)acquisition methods,the azimuth distribution of marine seismic data becomes increasingly wider.Wide azimuth seismic data with its large amount of information and good spatial continuity provides high-quality data basis for accurate prediction of fracture development zones in reservoirs.Based on the OVT(Offset Vector Tile)domain imaging of OBS seismic data,this paper carries out research on seismic fracture detection technology,analyzes the amplitude azimuthal anisotropy characteristics of P wave in complex structural areas,predicts the direction and density of fracture development according to the basic principle that seismic amplitude changes with azimuth.The OVT domain of OBS 3D seismic compressional wave data in Bozhong,Nanhai and other work areas is processed to obtain multiple azimuth seismic data volumes.The least square fitting algorithm is applied to calculate the development density and direction of fractures in this work area,which provides a certain basis for the design of drilling and development plans for later fractured oil and gas reservoirs.
作者
张兴岩
张立霞
钱进
丑纪辉
史文英
张敏
Zhang Xingyan;Zhang Lixia;Qian Jin;Chou Jihui;Shi Wenying;Zhang Min(Gephysical Rsearch Istituteen,Geophysical-COSL,Zhanjiang Guangdong 524075,China;School of Resource and Geosciences China University of Mining and Technology,Xuzhou Jiangsu 221116,China)
出处
《工程地球物理学报》
2024年第5期743-754,共12页
Chinese Journal of Engineering Geophysics
基金
中海油服科研项目(编号:WTB18YF002,WTB22YF010)。
作者简介
第一作者:张兴岩(1982-),男,博士,高级工程师,主要从事海洋地震数据处理工作。E-mail:kdzy01@126.com。
