天然气勘探与开发2024，Vol.47Issue(3)：32-45,14.DOI:10.12055/gaskk.issn.1673-3177.2024.03.004
潜伏背斜精细建模及其应用效果分析
Fine modeling on buried anticlines and its application:Examples from the Carboniferous gasfields,eastern Sichuan Basin
梁顺军 1王兰英 2徐敏 2郭海洋 2陆林超 3王征 2李金枝 2赵振伟 2朱中华 2游李伟2
作者信息
- 1. 中国石油集团东方地球物理勘探公司西南物探分公司 四川成都 610213||中国石油集团东方地球物理勘探公司西南物探研究院 四川成都 610213
- 2. 中国石油集团东方地球物理勘探公司西南物探研究院 四川成都 610213
- 3. 中国石油西南油气田公司开发事业部 四川成都 610051
- 折叠
摘要
Abstract
Exploration domains on high-steep structures of eastern Sichuan Basin are dominated by anticlinal traps.Limestone exposure to anticlines with poor preservation can result in a little value in the exploration.In contrast,boasting better preservation,burial anticlines grow into favorable belts to accumulate natural gas.The Carboniferous gas reservoirs in eastern basin belong to structural-trapped ones.How to ascertain their trap morphology is very important because of the effect on drilling success.So far,the natural gas in the Carboniferous burial anticlines have entered the stage of potential tapping.But there still exist such anticlines with unconfirmed seismic data or large depth error in logging-seismic interpretation,which need to be further studied.So,based on seismic profiles,surface geology,drilling and logging data,some fine modeling on the burial anticlines was proposed.And such anticlines were divided into 4 categories,including 7 subcategories and 30 classes.Both exploration and development endings were evaluated with regards to the 4 categories.Results show that(ⅰ)model forward and inversion can be conducted,which are beneficial for analyzing complex wavelength,time-domain structural distortion,and high-point migration patterns;(ⅱ)to create a reasonable time-depth conversion and pre-stack depth migration velocity model can improve the reliabil-ity of depth-domain structural morphology;and(ⅲ)for steeply burial anticlines,determining their basic types and morphology based on reflection characteristics of horizontally-stacked time profiles may avoid any pseudo-burial anticlines representing in the depth domain.The proposed fine modeling on this kind of anticlines in eastern Sichuan Basin will play a positive role in the further exploration of the Carbonif-erous gas reservoirs.关键词
石炭纪/潜伏背斜/精细建模/地震成果/精度分析Key words
Carboniferous/Burial anticline/Fine modeling/Seismic result/accuracy analysis引用本文复制引用
梁顺军,王兰英,徐敏,郭海洋,陆林超,王征,李金枝,赵振伟,朱中华,游李伟..潜伏背斜精细建模及其应用效果分析[J].天然气勘探与开发,2024,47(3):32-45,14.
