王辉. 辽河盆地西部凹陷未熟油的成藏条件[J]. 海洋地质前沿, 2013, 29(3): 37-41.
    引用本文: 王辉. 辽河盆地西部凹陷未熟油的成藏条件[J]. 海洋地质前沿, 2013, 29(3): 37-41.
    WANG Hui. IMMATURE OIL ACCUMULATIONS IN THE WEST DEPRESSION OF LIAOHE BASIN[J]. Marine Geology Frontiers, 2013, 29(3): 37-41.
    Citation: WANG Hui. IMMATURE OIL ACCUMULATIONS IN THE WEST DEPRESSION OF LIAOHE BASIN[J]. Marine Geology Frontiers, 2013, 29(3): 37-41.

    辽河盆地西部凹陷未熟油的成藏条件

    IMMATURE OIL ACCUMULATIONS IN THE WEST DEPRESSION OF LIAOHE BASIN

    • 摘要: 钻探结果表明,在辽河盆地西部凹陷北部及中南部沙河街组四段、三段中浅层储层中均见到了一定数量的未熟原油,探明储量也很可观。从原油生成、运移聚集成藏特征等几个方面进行了较为详细地分析。认为未熟油在成藏的整个过程中,主要受到源岩沉积环境、运移通道及构造活动所控制,是特定条件下的产物,其成藏规模受未熟源岩的排烃数量以及储集岩体物性条件所制约,与成熟油藏比较,既有相似之处又有一定的差异性。随着油区勘探程度的提高和研究的不断深入,岩性构造型未熟油藏才逐步被人们所认识。因此,开展此项研究无疑对拓宽油气勘探领域具有一定的指导意义。

       

      Abstract: Drilling results have revealed the occurrence of immature crude oil in the shallow reservoirs of the 3rd and 4th members of Shahejie Formation in the Western Depression of Liaohe basin. Proved reserves are impressive. We studied in this paper the process of oil generation,migration and accumulation, and believed that the formation of immature oil requires a specific combination of depositional environment of source rocks,availability of migration channels and tectonic activities. The scale of the accumulation depends upon the constraints of hydrocarbon from source rocks and the physical properties of the reservoir rocks. Compared with the mature accumulation, there are both similarities and differences. With the improvement of exploration technology, more lithology and structure controlled immature accumulations have been recognized. Further study of the oil accumulation of this type will doubtlessly broaden the scope of oil and gas exploration in the basin.

       

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