雅克拉凝析气田油气地球化学特征  

Geochemical Characteristics of hydrocarbon in Yakela Gas Condensate Field, Tarim Basin

作　　者：高波[1] 刘文汇[1,2] 张殿伟[1] 范明[2] 

机构地区：[1]中国石油化工股份有限公司石油勘探开发研究院,北京市100083 [2]中国石油化工股份有限公司石油勘探开发研究院无锡石油地质研究所

出　　处：《海相油气地质》2008年第3期49-54,共6页Marine Origin Petroleum Geology

基　　金：中国石油化工股份有限公司科技项目(编号:P04090)

摘　　要：雅克拉凝析气田天然气组分以甲烷为主,含量79.13%￣89.30%;重烃含量较高,平均占9.67%;干燥系数(C1/C1-5)介于0.89～0.92之间,属典型的湿气。δ13C1为-40.8‰～-39.4‰,δ13C2为-32.0‰～-30.2‰,δ13C3为-30.5‰～-28.9‰,表明天然气为典型的油型气。原油及其族组分的碳同位素组成和生物标志化合物呈现出典型的海相原油特征。原油成熟度较高,与天然气的成熟度基本相同,表明油气同源、同阶,为一次油气充注的产物,而与塔河油田存在较大差异。Abstract： Geochemical analysis of hydrocarbon in Yakela Field shows that natural gas is characterized by dominant methane in content with a range of 79.13%-89.30% and by high content of heavy hydrocarbon with of average 9.67% and low dry coefficient （C1/C1-5） of 0.89-0.92, which suggests it is a typical wet gas. Carbon isotopic values of heavy gaseous hydrocarbon in which δ^13C1 is -40.8 ‰ --39.4 ‰, δ^13C2 is -32.0 ‰ --30.2 ‰ and δ^13C3 is -30.5 ‰ --28.9 ‰ demonstrate that the gas is oil-prone. According to the chemical and carbon isotopic compositions of crude oil and the biomarker characteristics,the crude oil in the field derived from marine sources. The crude oil has been at high stage of maturity that is almost consistent with natural gas,which is inferred that both the oil and the gas are the products during one time of hydrocarbon-filling history so that the hydrocarbon in Yakela Condensate Field is distinct from that in Tahe oil Field.

关 键 词：雅克拉气田 原油 天然气 地球化学特征 成熟度 

分 类 号：TE125.2[石油与天然气工程—油气勘探]