库车坳陷阿瓦特地区高精度地震成像技术及应用  

High precision seismic imaging technology and applicationin Tuziawat area of Kuqa Depression

作　　者：罗虎志 裴家定 袁燎 高现俊 庄秋晓 LUO Huzhi;PEI Jiading;YUAN Liao;GAO Xianjun;ZHUANG Qiuxiao(BGPINC.,China National Petroleum Corporation,Zhuozhou 072751,China)

机构地区：[1]中国石油东方地球物理勘探有限责任公司,涿州072751

出　　处：《物探化探计算技术》2024年第6期696-701,共6页Computing Techniques For Geophysical and Geochemical Exploration

摘　　要：阿瓦特区块位于塔里木盆地库车坳陷克拉苏冲断带西段,地表高程变化大、起伏剧烈,地下构造极其复杂。受地表及地下地质条件的影响,地震资料叠前深度偏移处理准确成像困难。笔者针对该区特殊的地质特征,通过近真地表叠前深度偏移技术、高精度浅表层速度建模技术、特殊岩性体速度精细刻画技术、多方位网格层析成像技术等系列高精度地震成像技术的应用,大幅度提升了该区地震资料的叠前深度偏移成像品质,为后续地质解释及油气勘探开发奠定了坚实的数据基础。The tuziawat area is located in the western section of the Kelasu thrust belt in Kuqa Depression,Tarim Basin.The surface elevation changes greatly,the drastic fluctuation,and the underground structure is highly complicated.Due to the influence of surface and underground geological conditions,it is difficult to get accurate seismic imaging result with prestack depth migration.Aiming at the unique geological characteristics of the Tuziawat area,this paper proposes an innovative workflow to improve the seismic imaging result quality with prestack depth migration.The proposed workflow consists of a series of technologies,such as near-real surface prestack depth migration,high-precision shallow surface velocity modeling,high-precision velocity characterization of particular lithology body and multi-azimuth grid tomography.The workflow application improves the quality of the seismic imaging result with prestack depth migration,which lays a solid data foundation for subsequent geological interpretation and oil and gas exploration and development.

关 键 词：高精度地震成像 近真地表叠前深度偏移 浅表层 特殊岩性体 多方位网格层析 

分 类 号：P631.4[天文地球—地质矿产勘探]