海面拖缆与海底OBN/OBS地震数据联合弹性波成像方法研究

申请者近年来提出了基于声-弹耦合方程的海底四分量地震数据弹性波成像方法，在弹性波成像方面取得了一些研究进展，但稀疏OBN/OBS数据弹性波成像仍存在成像采集脚印、相位连续性差、信噪比低等问题。本项申请拟在已取得研究成果的基础上针对上述问题开展海面拖缆和海底OBN/OBS地震数据联合弹性波成像方法研究，包括以下内容：（1）研究用于海面拖缆-海底OBN/OBS地震数据联合弹性波成像的方程；（2）开展海面拖缆-海底OBN/OBS数据联合弹性波逆时偏移方法研究；（3）开展海面拖缆-海底OBN/OBS数据联合弹性波最小二乘逆时偏移方法研究。本项申请旨在改善稀疏OBN/OBS数据弹性波成像的问题，推动海底地震数据弹性波成像技术进步，进而解决深海油气资源勘探多波成像的难题。

The applicant has proposed the elastic wave imaging method for four components seismic data based on the acoustic-elastic coupled equations in recent years and made some progresses in elastic wave imaging, but for sparse OBN/OBS four components data elastic imaging, the problems of imaging acquisition footprints, poor phase continuity and low signal-to-noise ratio still exist. We intend to propose the theory of elastic wave joint imaging of Towed Streamer (TS) and OBN/OBS seismic data to solve the above problems based on the research results. The primary objective of this research will focus on: 1) study on the equation of elastic wave joint imaging of TS and OBN/OBS data; (2) research on joint elastic reverse-time migration of TS and OBN/OBS data; (3) research on joint elastic least-squares reverse-time migration of TS and OBN/OBS data. The results are of prime importance for improving the elastic wave imaging problems of sparse OBN/OBS data and promoting the progress of elastic wave imaging technology of ocean-bottom seismic data, so as to solve the challenge of elastic wave imaging in deep-sea oil and gas exploration.