济源凹陷邓2井含油构造的成藏作用研究

Oil-Formation Studying of Deng 2 Well Oil-Bearing Structure in Jiyuan Depression

邓 2井含油构造 ,油层为余庄组的河流相砂岩 ,位置处于后邓构造顶部 ,油藏为屋脊断块构造类型。由于研究区的第三系和白垩系均为红层 ,余庄组原油只有可能来自上三叠统谭庄组或下侏罗统鞍腰组的烃源岩。从邓 2井的油砂分析出发 ,测定其气液包裹体的均一化温度和爆裂温度 ,判定油藏形成的温度范围 ;对包裹体内部和外部的原油进行生物标志化合物分析 ,利用砂岩的成岩作用、包裹体形成和油气聚集之间的关系进一步判别成藏的期次和地质时间 ;再对该油藏发育的地质史进行剖析 。

Deng 2 well is in ridge fault-block reservoir with it's oil layer in the sandstone of Yuzhuang formation fluvial facies and the location in the top of Houdeng structure.Because that Tertiary and Cretaceous sediments are red,the oil of Yuzhuang formation can only come from the hydrocarbon source rock of Tanzhuang formation of upper Triassic or Anyao formation of lower Jurassic.Based on the oil sand analysis of Deng 2 well,measure the gas-liquid inclusion homogenization and bursting temperature and define the temperature at which the reservoir formed.Analyze the oil biomarker of the interior and exterior of the inclusion.According to the sand diagenesis and the relation of the inclusion formation and the oil-gas accumulation,further define the stage and geologic time of the oil accumulation.Analyze the reservoir formation history and construct the model.