论文部分内容阅读
以层序地层学为依据,利用地震资料和测井信息,建立沉积相、地震相与暗色泥岩之间的关系,对南堡凹陷不同层序地层格架内泥岩、暗色泥岩的分布进行预测。在此基础上,利用测井资料识别有机碳含量的方法,通过统计不同体系域和不同沉积相带泥岩的烃源岩达标率,对南堡凹陷深层烃源岩的分布和厚度进行了预测与评价。结果表明,湖侵体系域和高位体系域下部是烃源岩发育的主要位置。SQ2暗色泥岩和烃源岩厚度占地层总厚度的比例最大,SQ5—SQ8和SQ9次之,但累积烃源岩厚度大体相当。并不是所有的暗色泥岩都可以成为烃源岩,烃源岩的分布与有机质的富集程度有关。
Based on the sequence stratigraphy, the relationship between sedimentary facies, seismic facies and dark mudstone is established by using seismic data and logging information, and the distribution of mudstone and dark mudstone in different sequence stratigraphic frameworks in Nanpu Sag is predicted. On the basis of this method, the method of identifying organic carbon content by logging data is used to predict the distribution and thickness of deep source rocks in Nanpu sag by counting the compliance rate of source rocks of mudstone in different sedimentary facies and sedimentary facies Evaluation. The results show that the lower part of the lacustrine system tract and the highstand system tract are the main sites for the development of source rocks. The proportion of SQ2 dark mudstone and source rock in the total thickness of the formation is the largest, followed by SQ5-SQ8 and SQ9, but the cumulative source rock thickness is roughly the same. Not all dark mudstones can be source rocks, and the distribution of source rocks is related to the degree of enrichment of organic matter.