The Techniques of 3D Joint Channel Sandstone Processing in Xinchang-Shifang Area Western Sichuan

doi:10.11885/j.issn.1674-5086.2022.01.24.01

Abstract

Abstract: The medium shallow layer channel sandstone in Western Sichuan is thin in thickness and narrow in width, so it is very difficult to identify by seismic data. It is the premise for seismic technology to identify sand body distribution to keep the relative change relationship between seismic reflection amplitude and waveform. Because of the large time span of acquisition, different acquisition instruments and different geometry, there are some inconsistencies among the data in Xinchang-Shifang Area, such as system time difference, amplitude, frequency and waveform. Based on the analysis of the original data, the problems and difficulties in the target processing of the 3D joint channel sandstone are clarified, and a set of solutions and ideas are established. The purpose of data processing is to improve the imaging effect of middle and shallow layers and to highlight the seismic response characteristics of channel sandstone. It mainly studies, tests and analyzes the technologies of time difference correction, denoising, static correction, amplitude recovery and compensation, deconvolution, surface consistency processing, residual static correction, data regularization, velocity analysis, migration imaging and gather optimization, and completes the actual data processing. The processing results have the characteristics of high signal-to-noise ratio, high resolution and high fidelity. The wave groups between blocks have good continuity, stability and consistency, which can provide high-quality basic data for subsequent structural interpretation, sand body characterization, reservoir prediction and gas bearing identification.

Key words: Western Sichuan, channel sandstone, joint, processing, deconvolution, pre-stack time migration

CLC Number:

TE377

MA Zhaojun, LIU Hongai, LING Hang. The Techniques of 3D Joint Channel Sandstone Processing in Xinchang-Shifang Area Western Sichuan[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2022, 44(3): 26-36.

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URL: http://journal15.magtechjournal.com/Jwk_xnzk/EN/10.11885/j.issn.1674-5086.2022.01.24.01

http://journal15.magtechjournal.com/Jwk_xnzk/EN/Y2022/V44/I3/26

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