NZ3D seismic reflection data volume - Prestack Depth Migration (PSDM)

This is the prestack depth migrated seismic reflection data volume that was produced from multi-channel seismic lines acquired during the Langseth cruise MGL1801 as part of the NZ3D Hikurangi margin project in 2018. This SEG-Y file is a 3D migration produced by CGG in Singapore using a Kirchhoff 3D prestack depth migration algorithm. This volume includes advanced signal processing to remove multiples, source and receiver ghost, and other artifacts (see associated processing report for details). The volume was migrated after signal processing using seismic velocities derived from streamer data and 97 OBS provided by JAMSTEC. The velocity model was constructed as a 3D anisotropic (TTI) model using 3D full waveform and tomographic inversion (details are provided in the processing report, and the model is available here as a linked data set). The accompanying information document describes the 3D grid parameters including bin grid origin and orientation for workstation loading, the Data Parameters, the SEG-Y trace header, and the processing sequence. The data set was generated as part of the project called "A community 3-D seismic investigation of fault property controls on slow slip along the Hikurangi megathrust". Funding was provided through NSF awards: OCE15-58440, OCE15-58574, OCE15-59008, OCE15-59298.

本数据集为2018年NZ3D希库兰吉（Hikurangi）陆缘项目的一部分，源自朗塞特（Langseth）科考航次MGL1801采集的多道地震测线，经处理得到叠前深度偏移地震反射数据体。本SEG-Y格式文件为三维偏移数据体，由新加坡CGG公司采用基尔霍夫三维叠前深度偏移算法生成。该数据体集成了先进的信号处理流程，可去除多次波、震源与检波器鬼波及其他伪影（详细信息请参阅配套处理报告）。该数据体在信号处理完成后进行偏移成像，所用地震速度由拖缆数据及日本海洋地球科学技术机构（JAMSTEC）提供的97台海底地震仪（Ocean Bottom Seismometer, OBS）反演得到。速度模型采用三维全波形反演与层析成像反演方法构建为三维各向异性（TTI，倾斜横向各向同性，Tilted Transversely Isotropic）模型（详细信息请参阅处理报告，该速度模型可作为关联数据集在此处获取）。配套说明文档介绍了三维网格参数（包括用于工作站加载的面元网格原点与方位）、数据参数、SEG-Y道头信息及处理流程。本数据集为项目「沿希库兰吉巨型逆冲带慢滑移断层属性控制的社区三维地震调查」的研究成果之一。本项目受美国国家科学基金会（National Science Foundation, NSF）资助，资助编号为OCE15-58440、OCE15-58574、OCE15-59008及OCE15-59298。

搜集汇总

背景与挑战

背景概述

该数据集是新西兰Hikurangi边缘的3D地震反射数据体，采用Prestack深度偏移处理，包含经过高级信号处理的地震数据，用于研究Hikurangi巨型逆冲断层的慢滑移特性。数据来自2018年Langseth巡航采集，由CGG公司使用Kirchhoff 3D算法处理，并获得了美国国家科学基金会的资助。