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作为河西走廊地区的重要含油气盆地,由于自然地理条件差,且以往勘探多限于盆地周缘(南缘)地区,故武威盆地内部勘探程度较低,给该地区油气资源评价带来了难度。本文从盆地油气地质条件和分布规律入手,以盆地评价为重点,针对石炭系和二叠系地层,主要对盆地构造特征、烃源岩评价、储集条件等油气地质、地化方面进行了研究,由于评价区沉积岩厚度较小,故采用成因法中的数字化积分法和氯仿沥青“A”法对油气资源进行远景评价。通过资源量的计算,表明武威盆地具有一定的油气资源勘探前景。
As an important petroliferous basin in the Hexi Corridor region, due to poor natural and geographical conditions and the previous exploration mostly limited to the basin periphery (south margin), the degree of exploration inside the Wuwei Basin is relatively low, which makes it difficult for the regional oil and gas resources assessment. This paper starts with the geological conditions and distribution laws of oil and gas in the basin and focuses on the evaluation of the basin. For the Carboniferous and Permian strata, the study focuses on the geological and geochemical aspects of the petroleum geology and geochemistry of the basin, such as structural features, source rock evaluation and reservoir conditions Due to the small thickness of sedimentary rocks in the evaluation area, the oil and gas resources were prospectively evaluated by the method of digital integration in the genesis method and the method of chloroform bitumen “A”. Through the calculation of the amount of resources, it shows that the Wuwei Basin has a certain prospect of oil and gas exploration.