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运用地球化学研究手段,对文东地区沙二和沙三段原油、油砂和泥岩进行了饱和烃气相色谱-质谱分析,认为沙二和沙三段原油来自沙三段烃源岩;通过对研究区储层流体包裹体的分析,结合原油构造演化资料,对沙二和沙三段油藏的成藏时期进行了分析。沙二段油气藏主要成藏期为东营中后期及抬升剥蚀期,主成藏期为30～17Ma;沙三段为两期油气充注,第一期为在东营初期(距今33～23Ma),为主成藏期;第二期发生在明化镇期(距今10～0Ma)之后。对文东地区成藏模式进行了分析,把文东地区油藏分为近洼原生型、油源断层控制的调整型和浅层次生型3类。
By means of geochemical research, saturated hydrocarbon gas chromatography-mass spectrometry (GC-MS) analysis of crude oil, oil sands and mudstone in the second and the third Shahejie Formation in the Wendong area was carried out. It is concluded that the crude oil from the third and the third Shahejie formation is from the Es3 source rock. Based on the analysis of fluid inclusions in reservoirs and the data of structural evolution of crude oil, the period of hydrocarbon accumulation in the second and the second Shahejie Formation was analyzed. The main hydrocarbon accumulation in the second member of Shahejie Formation is the middle and late Dongying uplift and erosion period, and the main hydrocarbon accumulation period is 30 ~ 17Ma. The third member of Shahejie formation is two periods of oil and gas filling. The first phase is in Dongying (33 ~ 23Ma ago) ), The main accumulation period; the second occurred in Minghua town (10 ~ 0Ma) after. Based on the analysis of the reservoir forming patterns in the Wendong area, the reservoirs in the Wendong area are divided into three types: the reconstructed and shallow secondary types of the near-depression primary type and the source fault control.