唐家河地区原油地球化学特征及来源分析

Geochemical features and origin analysis for the crude oil in Tangjiahe area

油源对比是油气成藏机理研究及成藏模式分析的基础工作之一。为进一步认识大港油田唐家河地区的勘探前景,开展了唐家河地区中浅层原油及中深层烃源岩的有机地化特征研究,并进行了系统的原油与原油、原油与烃源岩对比,明确了唐家河地区中浅层各层系原油来源于深层沙三段及沙二段烃源岩,而沙一段和东营组的烃源岩贡献不大。认为唐家河地区沙三段烃源岩是该区油气的来源。

The oil-source correlation is one of the basic works in the study of oil and gas reservoir forming mechanics and model analysis.In order to further recognizing the exploration prospect in Tangjiahe area of Dagang Oilfield,the study of organic geochemical features was carried out for the oil in middle shallow zones and for the hydrocarbon source rocks in middle deep zones of the area,and the systematic correlation in crude oil to crude oil and crude oil to hydrocarbon source rocks was made.It has been identified that the crude oil of each series of strata in middle shallow zones of the area came from the hydrocarbon source rocks in deep Members 3 and 2 of Shahejie Formation,while the hydrocarbon source rocks in Member 1 of Shahejie Formation and Dongying Formation were with a bit of contribution.It is considered that the hydrocarbon source rocks in Member 3 of Shahejie Formation are the parent source for Tangjiahe area's oil and gas.