成都理工大学学报（自然科学版）2024，Vol.51Issue(6)：897-912,16.DOI:10.3969/j.issn.1671-9727.2024.06.01
四川盆地简阳地区须四段致密砂岩气富集高产控制因素
Controlling factors of tight sandstone gas enrichment and high yield in the fourth member of the Xujiahe Formation in Jianyang area,Sichuan Basin
摘要
Abstract
Recently,significant breakthroughs have been made in the exploration and development of tight sandstone gas in the section 4(S4)member of the Jianyang area in Sichuan Basin.However,during the exploration and development process,it was found that there is differential enrichment of natural gas in the Xujiahe Formation in the Jianyang area,with a cross distribution of high and low production wells.The lack of understanding of the controlling factors related to natural gas enrichment severely restricts the next exploration deployment in this block.Aimed at addressing the key scientific problems of large-area,gas-bearing,local differential enrichment and the complex gas-water relationship in the Xujiahe Formation,the hydrocarbon source conditions,reservoir characteristics,and structural characteristics of the study area are comprehensively studied.The methods used in this study including studying thin rock sections,mercury injection,carbon isotopes,and pyrolysis gas of hydrocarbon source rocks.The controlling factors of tight sandstone gas accumulation in the study area are clarified,and a high-yield model of natural gas enrichment is established.The research results show that:(4)The natural gas in the S4 member of the Jianyang area is of coal-type,mainly supplied by local section 3,upper sub-member,hydrocarbon source rocks;(2)The development of hydrocarbon source rocks controls the gas-water distribution pattern of the S4 member,with thick hydrocarbon source rocks on the lower slope having high gas saturation,and thin hydrocarbon source rocks on the upper slope having high water saturation;(3)The tight gas enrichment and high yield are controlled by a combination of the physical properties of the fault and reservoir,including the development of a fault-fracture-reservoir superposition.A tight sandstone gas accumulation model of"near source hydrocarbon supply,fault channeling,reservoir fracture control production"is established.The research results provide theoretical guidance for the geological exploration of tight sandstone gas in the slope belt of Sichuan Basin.关键词
致密砂岩气/控制因素/成藏模式/须四段/简阳区块/四川盆地Key words
tight sandstone gas/control factors/accumulation mode/the fourth member of the Xujiahe Formation/Jianyang area/Sichuan Basin分类
天文与地球科学引用本文复制引用
杨魏,张洋洋,李勇,邱玉超,王小娟,陈世加,郑超,杨强,金值民,张奥博..四川盆地简阳地区须四段致密砂岩气富集高产控制因素[J].成都理工大学学报（自然科学版）,2024,51(6):897-912,16.基金项目
国家自然科学基金(42302164) （42302164）
中国石油科技创新基金(2022DQ02-015). （2022DQ02-015）
