石油地球物理勘探2025，Vol.60Issue(6)：1409-1416,8.DOI:10.13810/j.cnki.issn.1000-7210.20240423
四川盆地筇竹寺组深层页岩气高精度地震采集技术
High-precision seismic acquisition technology of deep shale gas in Qiongzhusi Formation of Sichuan Basin
摘要
Abstract
The seismic data of the Lower Cambrian Qiongzhusi Formation in the Sichuan Basin has weak re-flected energy without distinct characteristics of interlayer wave groups and clear description of faults,which makes it difficult to meet the requirements for fine prediction of high-quality shale reservoirs and the accurate de-sign of horizontal well trajectories.In response,taking the 3D seismic project for shale gas in Well Z201 as an example,this paper proposes a high-precision seismic acquisition technology of deep shale gas in Qiongzhusi Formation of Sichuan Basin.First,the observation system parameter optimization technology for pre-stack in-version of reservoirs is applied to design the observation system.Then,the intelligent layout of physical points in the obstacle area based on the contribution degree is conducted to improve the uniformity of coverage times in the target zone.Finally,the surface velocity and lithology constrained modeling technology is used to character-ize the near-surface structure and spatial distribution of lithology within the survey area.The application results of the proposed method in seismic acquisition of shale gas in Qiongzhusi Formation demonstrate that high-reso-lution,broadband seismic data can be obtained using the technology,which provides a data basis for the subse-quent high-resolution processing and fine reservoir description.关键词
四川盆地/筇竹寺组/观测系统优化/物理点智能布设/表层调查/拓频提能激发Key words
Sichuan Basin/Qiongzhusi Formation/observation system optimization/intelligent layout of physi-cal points/surface survey/frequency broadening and energy enhancing excitation分类
天文与地球科学引用本文复制引用
ZHENG Majia,WU Zengyou,ZHANG Xiaobin,WANG Xiaoyang,LU Linchao,LI Shuqin..四川盆地筇竹寺组深层页岩气高精度地震采集技术[J].石油地球物理勘探,2025,60(6):1409-1416,8.基金项目
本项研究受中国石油天然气股份有限公司西南油气田分公司"川南地区筇竹寺组深层页岩气"双高"采集方法试验及处理解释研究技术"(2024D101-03-04)资助. （2024D101-03-04）
