深层油气相态多样性成因与次生地球化学作用强度评价:以塔里木盆地海相油气为例
朱光有 , 李婧菲 , 张志遥
地球科学 ›› 2025, Vol. 50 ›› Issue (06) : 2163 -2178.
深层油气相态多样性成因与次生地球化学作用强度评价:以塔里木盆地海相油气为例
Origin of Deep Oil and Gas Phase State Diversity and Evaluation of Secondary Geochemical Intensity:A Case Study of Marine Oil and Gas in Tarim Basin
,
塔里木盆地海相油气的地球化学性质与相态类型复杂多样,从一张油藏剖面上可以看到稠油、黑油、凝析油、天然气等共存.综合运用多种地球化学分析方法,获取了塔里木盆地深层海相油气的相态类型、次生作用过程等信息,通过对不同相态类型油气地球化学特征的对比研究,论证了海相油气遭受生物降解、气侵分馏、硫酸盐热化学还原反应(thermochemical sulfate reduction,TSR)、热裂解等次生地球化学作用的改造机制与过程;建立了基于硫代金刚烷、乙基降金刚烷等次生地球化学作用的产物对次生改造强度定量的评价参数公式,应用于油气性质与相态的定性预测,对于深层油气相态钻前预测具有一定的指导意义.
The geochemical properties and phase types of marine oil and gas in Tarim basin are complex and diverse. Heavy oil, normal oil, condensate and natural gas coexist from a reservoir profile. By comprehensively applying various geochemical analysis methods, the information of phase types, components and stable isotopes of deep-seated Marine oil and gas in Tarim basin is obtained, and the geochemical characteristics of different phase types of oil and gas are compared, and demonstrate a variety of secondary geochemical mechanisms and processes such as biodegradation, gas invasion and fractionation, thermochemical sulfate reduction (TSR), and thermal cracking of marine oil and gas; And further the quantitative evaluation parameters formulae for the strength of secondary transformation based on the products of secondary geochemistry such as thiadiamondoids and ethanodiamondoids were established respectively, can be effectively used in the qualitative prediction of the spatial distribution of oil and gas properties and phase behavior, the diversity of deep oil and gas phase formation mechanism and distribution of prediction before drilling and has certain theory and guiding significance.
生物降解 / 气侵分馏 / TSR / 热裂解 / 超深层油藏 / 塔里木盆地 / 石油地质.
biodegradation / gas invasion fractionation / TSR(sulfate thermochemical reduction) / thermal cracking / ultra-deep oil reservoir / Tarim basin / petroleum geology
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中国石油天然气股份有限公司科学研究与技术开发项目(2019B⁃04)
中国石油天然气股份有限公司科学研究与技术开发项目(2018A⁃0102)
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