石油地球物理勘探2023，Vol.58Issue(6)：1454-1462,9.DOI:10.13810/j.cnki.issn.1000-7210.2023.06.017
多分量地震在致密气储层精细描述中的应用
Application of multi-component seismic technology in fine description of tight gas reservoirs
摘要
Abstract
The channel sandstone of Shaximiao Formation in Qiulin area of the central Sichuan Basin has the geo-logical characteristics of multiple stages and superimposed sand bodies.The fine description of sand bodies and their superimposed relationships plays a crucial role in the deployment of horizontal wells.Since the conventional seismic exploration method is difficult to obtain the ideal effect,the multi-component seismic exploration has been carried out in the study area.The results show that:① The P wave velocity of sandstone and mudstone in Shaximiao Forma-tion is basically the same,while the S wave velocity is highly different,so the converted wave has a great advantage in distinguishing lithology.② The P wave data are not sensitive to the change of sand bodies,and the seismic wave-form cannot reflect the superimposed relationship of sand bodies.Although the main frequency of the converted wave is lower than that of the P wave,it is sensitive to the change of lithology,and the seismic waveform has a good correspondence with the change of sand bodies.③ The S wave velocity accuracy by the P wave pre stack inversion is low,while the S wave velocity by joint PP-PS wave inversion has high prediction accuracy,which can accurately characterize the sand body and its superimposed relationship.The study shows that multi-component seismic tech-nology has the potential to accurately describe sandstone reservoirs,which provides a data basis for accurate and effi-cient development of tight sandstone gas reservoirs in Shaximiao Formation.关键词
多分量/致密气/PS波/纵、横波联合反演/储层预测Key words
multi component/tight gas/PS wave/joint PP-PS wave inversion/reservoir prediction分类
天文与地球科学引用本文复制引用
张明,张昕,梁菁,姜晓宇,甘利灯,尉晓玮..多分量地震在致密气储层精细描述中的应用[J].石油地球物理勘探,2023,58(6):1454-1462,9.基金项目
本项研究受中国石油天然气股份有限公司科技项目"陆相碎屑岩油藏地球物理描述技术研究与现场攻关试验"(2022KT1505)资助. （2022KT1505）
