石油地球物理勘探2024，Vol.59Issue(4)：790-799,10.DOI:10.13810/j.cnki.issn.1000-7210.2024.04.007
超深水区基准面延拓驱动的反射波形反演成像
Reflection waveform inversion imaging driven by redatuming in ultra-deepwater area
摘要
Abstract
Offshore petroleum exploration beyond the continental shelf is characterized by high risk and substan-tial investment,necessitating high precision in structural imaging and reservoir prediction.Traditional velocity modeling method based on ray theory often fails to meet the demands for fine imaging.In ultra-deepwater explo-ration,seismic observations are challenged by the thick seawater layer,resulting in extended recording times and immense data and model spaces,making large-scale application of wave theory-based velocity modeling dif-ficult.To address this,this paper proposes a reflection waveform inversion imaging technology driven by reda-tuming.This technology mitigates the seismic wave propagation effects in the seawater layer,reducing data vol-ume,compressing model space,and alleviating velocity-depth ambiguity,thereby enabling the practical applica-tion of full waveform inversion in deep-sea environments.Due to the limited detection distance in ultra-deepwa-ter area,recording the first arrival wave with sufficient depth penetration is challenging,preventing its use in waveform inversion for velocity updates.Consequently,this paper employ reflection waveform inversion for the redatumed data to achieve a high-precision velocity model and imaging results.Synthetic data from theoretical models and actual data processing results from Block A in the South China Sea demonstrate that this technology significantly reduces data volume and enhances the efficiency of high-precision velocity modeling.It holds promising potential for improving ultra-deepwater oil and gas exploration.关键词
超深水/拖缆/基准面延拓/反射波形反演/逆时偏移/速度建模Key words
ultra-deepwater/streamer/redatuming/reflection waveform inversion/reverse time migration/ve-locity modeling分类
地质学引用本文复制引用
王璇,王腾飞,程玖兵,武泗海,朱峰,刘玉柱..超深水区基准面延拓驱动的反射波形反演成像[J].石油地球物理勘探,2024,59(4):790-799,10.基金项目
本项研究受国家自然科学基金项目"基于P/S模式解耦与海森算子的弹性反射波形反演方法及其应用"(42074157)、"OBS主动源深反射地震方法及其在荔湾凹陷构造研究中的应用"(41930105)、"二阶随机优化弹性反射波形反演方法研究"(42204110)和上海市自然科学基金项目"东海海底多分量数据智能P/S分离及二阶优化波形反演"(22ZR1465200)联合资助. （42074157）
