复杂黄土塬区DAS井地联采处理技术及应用

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关键词：黄土塬区，DAS-VSP，高分辨率处理，3D-VSP成像，高斯束偏移中图分类号：P631 文献标识码：A DOI：10.13810/j. cnki. issn. 1000-7210.20240224

Abstract：This paper is the second part of the research on DAS borehole-surface joint exploration（BSJE） tech nology in the onshore loess plateau area：data processing section. Aiming at tackling challenges of static correction in complex loess plateau area，low SNR of data，and poor imaging quality，based on the DAS 3D-VSP data acquired by BSJE，this study investigates signal analysis and imaging processing of onshore DAS 3D-VSP data， including DAS 3D-VSP adaptive wavefield separation，DAS 3D-VSP high-resolution processing，and DAS 3DVSP angle-domain Gaussan beam prestack depth migration，etc. By extracting accurate time-depth relationships，horizon velocities，deconvolution operators，spherical spreading compensation factors，atenuation factors around the well，high-resolution processing ofDAS 3D-VSPcan be achieved in conjunction with surface seismic data.Through practical applications in a certain block in the eastern part of the Ordos Basin，the efective frequency band of DAS 3D-VSP imaging data reaches 4～85Hz ，and the correlation coefficient of the well-seismic wave group is improved by 9.7% on average，thus，laying a solid data foundation for subsequent seismic geological interpretation，reservoir fine description，and residual oil exploration.

Keywords： loessplateauarea， DAS-VSP，high-resolution processing，3D-VSPimaging， Gaussianbeammigration 李乐，陈浩林，曹中林，等。（剩余10870字）