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白北凹陷为延长在二连盆地勘探开发新区块,自2006年以来,该凹陷部署5口井,整体上地质认识程度低,特别是对烃源岩的研究更少。桑参1井在阿尔善组钻遇大套暗色泥岩,证明该区具有一定的生油潜力。通过有机岩石学与有机地球化学常规分析,系统研究与评价此套烃源岩。结果表明,该凹陷主力烃源岩品质中-好,阿二段、腾格尔组下部为中-好烃源岩,有机质类型主要为II型;腾格尔组、阿二段烃源岩成熟,大量生油,但均未达生油高峰。腾格尔组下部、阿二段均为有效烃源岩。由此推断白北凹陷烃源岩具有良好的生烃潜力,勘探前景广阔。
In order to extend the exploration and development of new blocks in Erlian basin, the North Beijiao Sag has deployed 5 wells since 2006, with a low level of geological understanding as a whole. In particular, there have been few studies on source rocks. Sang Shen 1 well met a large set of dark mudstone in the Aershan Formation, proving that this area has certain oil potential. Through systematic analysis of organic petrology and organic geochemistry, this set of source rocks is systematically studied and evaluated. The results show that the quality of the main source rocks in the depression is good, that in the second member of the Saga Formation, that of the middle of the Tengger Formation is medium-favorable source rocks, and that of the second member of the Tengger Formation and the second member of the Arjun Member , A large number of oil, but did not reach the peak oil. The lower part of the Tengger Formation and the second member of Aocene are all effective source rocks. It can be inferred that the hydrocarbon source rocks in the Baibei depression have good potential for hydrocarbon generation and exploration prospect is broad.