摘要
川西地区侏罗系为一套巨厚红层，不具备生烃条件，但发现了分布广泛、储量丰富的侏罗系气藏。通过凝析油和生油岩Ｃ４ ～Ｃ７ 轻烃、天然气组分、天然气碳同位素等进行油—源、油—油和气—气对比得出：川西地区主要的侏罗系气藏的气源多来自下伏须五煤系地层；大兴西侏罗系次生气藏的气源却来自遭断层破坏的须二气藏。
In West Sichuan Basin,the Jurassic is composed of a series of red beds with a huge thickness,having no hydrocarbon generating potentiality.However,a large number of Jurassic gas reservoirs with abundant reserves have been found.Through the correlations between condensate and source rock,between condensate and the other condensate and between gas and the other gas by use of the indicators such as the light hydrocarbons (C 4～C 7) in condensate and source rock and the natural gas composition and carbon isotope,etc.,it is concluded that the natural gas in the major Jurassic gas reservoirs in West Sichuan Basin was mainly derived from the underlying Xu 5 coal measure strata and that in the secondary Jurassic gas reservoir in Daxingxi structure was derived from the Xu 2 gas reservoir destroyed by faults.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2000年第1期36-41,共6页
Natural Gas Industry
基金
国家"九五"科技攻关项目!96-110-补2 -02
