柴西油砂山地区油砂有机地球化学特征研究

Sedimentary Geology and Tethyan Geology(2018)

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Abstract
为深入研究油砂山地区油砂的古沉积环境、成熟度及母质来源,促进柴西地区非常规资源勘探开发,本文以油砂山干柴沟组油砂为研究对象,通过气相色谱-质谱分析,发现该区油砂正构烷烃受到轻度损失,降解程度为1级;该区油砂具有低的m(Ts)/m?值,相对低的m(C 29ββ)/m[(ββ+αα)]和m(C 29ααα-20S)/m[20(S+R)]的值,表明油砂油属低成熟油砂油;m(Pr)/m(Ph)较低,表明其源岩沉积强还原环境;油砂油样品具较高的m(r-蜡烷)/m(0.5C31)值,显示为高盐度咸水环境沉积;甾烷C 27、C 28和C 29参数成"L"型或"V"型分布,表明油砂油母质来源水生生物相对较多.
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Key words
Oil sands,geochemistry,parent type,sedimentary environment,maturity
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