Processing workflow for improving shallow seismic image quality on GeoEast platform: A case study on Shaximiao Formation in central Sichuan Basin
GAN Dayong1, GAO Xianwei2, ZHU Dan3, YANG Guangguang1, LYU Yan1, HAN Song1
1. Research Institute of Exploration and Development, PetroChina Southwest Oil & Gas Field Company, Chengdu, Sichuan 610041, China; 2. GRI, BGP Inc, CNPC, Zhuozhou, Hebei 072750, China; 3. Regional Geological Survey Crew, Sichuan Geological and Mineral Bureau, Chengdu, Sichuan 610000, China
Abstract：The developed channel sandstone of the Shaximiao Formation in the central Sichuan Basin is a new target of oil exploration and development. To cope with problems and difficulties existing in the shallow seismic data of the central Sichuan Basin, GeoEast software was used to carry out fidelity and amplitude preservation to improve the resolution of the seismic data. After analyzing the original seismic data, difficulties in data processing were found out, then corresponding technical measures were taken, including processing experiments on static corrections, denoising while preserving prestack amplitude, prestack time migration and trace gather optimization, and finally the processing parameters and processes suitable for the characteristics of the study area were summarized for batch processing of all data. Based on the result, high-resolution seismic data were obtained with active characteristics of wave group, high signal-to-noise ratio, continuous shallow events and reasonable migration. They are the basic data for fine prediction of channel sandstone reservoirs and seismic detection of gas-bearing property.
干大勇, 高宪伟, 朱丹, 杨广广, 吕龑, 韩嵩. 提高浅层地震成像品质的处理技术——以川中地区沙溪庙组为例[J]. 石油地球物理勘探, 2020, 55(s1): 56-63.
GAN Dayong, GAO Xianwei, ZHU Dan, YANG Guangguang, LYU Yan, HAN Song. Processing workflow for improving shallow seismic image quality on GeoEast platform: A case study on Shaximiao Formation in central Sichuan Basin. Oil Geophysical Prospecting, 2020, 55(s1): 56-63.
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