金湖凹陷汊涧西斜坡天X90块高密度、高粘度原油成因分析  

Genesis of High Density and High Viscosity Oil of Block Tian X90 in Western Chajiang Slope of Jinghu Sag

作　　者：冯武军[1] 赵挺[1] 

机构地区：[1]江苏油田分公司地质科学研究院,江苏扬州225012

出　　处：《石油天然气学报》2010年第1期192-196,共5页Journal of Oil and Gas Technology

基　　金：中国石油化工集团公司前瞻性项目(G8804-07-ZS-0010)

摘　　要：油砂饱和烃色谱分析表明,天X90块阜三段高密度、高粘度原油早期具有无水洗氧化及生物降解特征,烃源岩长期处于低熟-成熟生烃阶段是其主要成因,油气勘探应围绕次凹生烃中心展开。天X90井阜三段原油成因特殊,低熟不是其唯一成因,应有气洗及二氧化碳洗脱作用的参与,因此该区第三系油气勘探同时,应关注古生界油气及无机二氧化碳气成藏的可能。Saturated hydrocarbon chromatographical analysis indicated that there was no biodegradation or oxidation at the early stage of the high density and viscosity oil in Block Tian X90 in Ef3 . The high density and viscosity were the primary causes of low mature -source rock for a long term. It was pointed out that the oil and gas exploration should be carried out in the center of hydrocarbon generation in the subdepression. Oil genesis is special in Well Tian X 90 of Ef3, low mature is not the only reason, there exists influence of gas washing and carbon dioxide elution, thus Palaeozoic hydrocarbon reservoir and inorganic carbon dioxide gas reservoir formation should be concerned as well as Tertiary oil reservoirs.

关 键 词：金湖凹陷 原油成因 高粘度 生物降解 成熟度 

分 类 号：P618.13[天文地球—矿床学]