Combination Types of Coexistent Multiple Energy Resources in the Ordos Basin and an Analysis of the Upper Paleozoic Sedimentation Control Mechanism
鄂尔多斯盆地多种能源共存富集的组合形式及上古生界沉积控制机制分析

Coal, oil, uranium and natural gas are genetically related to each other in the Ordos basin, and the combination type of their coexistence is varied, showing regular superposition vertically. Late Palaeozoic is an important minerogenetic period in the Ordos basin. Although the basin is a component part of the North China basin basically characterized by similar sedimentation, the Ordos basin has it unique features. Based on an analysis of the sedimentary characteristics and sequence surfaces of Upper Palaeozoic coal-bearing strata in the basin, the authors divided the strata from Benxi Formation to Shihezi Formation into nine third-order sequences and four second-order sequences. On the whole, there exist altogether seven types of mineral resources, including gas in oil, gas in coal, top gas and bottom oil, uranium in oil, uranium in coal, and oil in coal, with each one being independent. During the evolution and development of the basin, different combinations of energy resources were developed within different structural units, which, however, showed certain degrees of correlation.