石臼坨凸起东南斜坡带输导体系与油气运聚模式

发布时间：2018-06-15 16:30

本文选题：断裂 + 砂体　；参考：《断块油气田》2017年06期

【摘要】：通过生物标志化合物对比,断面精细刻画,并利用断层活动性、砂体的展布特征以及成藏综合分析等技术手段,厘清了石臼坨凸起东南斜坡带油气来源,刻画了油气优势运移路径,确定了油气的优势输导体系,最终建立了石臼坨凸起东南斜坡带油气运聚模式。研究结果表明:1)研究区油气主要来自渤中凹陷沙一二段烃源岩为低成熟—成熟原油,且表现出良好的运移效应。2)油气成藏期为2.1 Ma,与生烃高峰时间5.2 Ma相匹配,具有晚期、快速、高效生烃的特征。3)石南一号边界断层规模大、活动性强、断面形态起伏,控制油气从渤中凹陷深层到石臼坨凸起浅层的垂向运移,凸起上晚期断裂控制浅层油气的垂向运移和聚集。4)古近系近源扇体沿着边界断层呈裙边状发育,与烃源岩大面积接触,具有中转油气的作用。馆陶组砂砾岩是新近系油气横向输导层,油气趋于沿着构造脊向高部位运移。明下段极浅水三角洲砂体发育,与断层组合构成构造-岩性圈闭,保存油气。5)在凸起斜坡带形成"断控源仓型"和"断裂直控型"油气运聚模式。
[Abstract]:The source of oil and gas in the southeastern slope of Shiyutuo uplift was clarified by means of biomarker comparison, fine cross-section characterization, fault activity, distribution characteristics of sand bodies and comprehensive analysis of reservoir formation. The dominant migration path of oil and gas is described and the dominant transportation system of oil and gas is determined. Finally, the oil and gas migration and accumulation model of the southeast slope of Shiyutuo uplift is established. The results show that the oil and gas in the study area mainly come from the source rocks of the first and second member of Shahejie formation in the Bozhong Sag, which are low mature and mature crude oil, and show a good migration effect. 2) the hydrocarbon accumulation period is 2.1 Ma, which matches the peak time of hydrocarbon generation at 5.2 Ma, and has a late stage. The characteristics of rapid and efficient hydrocarbon generation. 3) the large scale, strong activity and undulating cross-section of the No. 1 boundary fault control the vertical migration of oil and gas from the deep layer of Bozhong Sag to the shallow layer of Shiyutuo uplift. The late uplift faults control the vertical migration and accumulation of shallow oil and gas. 4) the Paleogene near-source fan develops neatly along the boundary fault, which is in contact with the source rock in a large area and has the function of transferring oil and gas. Guantao formation sandstone is a transversal oil and gas transport layer of Neogene, which tends to migrate along the tectonic ridge to high position. The very shallow water delta sand bodies of the lower part of the Ming Dynasty are developed, and the combination of faults constitutes a tectonic-lithologic trap, preserving oil and gas .5) forming "fault-controlled source-storehouse" and "fault-direct-controlled" oil-gas migration and accumulation models in the uplift slope zone.
【作者单位】：中海石油(中国)有限公司天津分公司;
【分类号】：P618.13

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