Oil & Gas Geology ›› 2004, Vol. 25 ›› Issue (4): 385-392.doi: 10.11743/ogg20040405

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Comparison of enrichment patterns of various energy resources in Ordos basin

Wei Yongpei, Wang Yi   

  1. Exploration & Production Research Institute, SINOPEC, Beijing
  • Received:2004-06-28 Online:2004-08-25 Published:2012-01-16

Abstract:

Ordos basin is prolific in oil, gas, coal and uranium resources. Vertically, oil, coal and uranium distribute mainly in Jurassic, while gas distributes mainly in Permian and Ordovician; natural gas is located below oil and uranium, and closely above and/or below the Permo-Carboniferous coal measures. Laterally, oil distributes in the central and southern ports of the basin, uranium deposits are located in the northern and western edges of the basin, natural gas and coal distribute in the whole basin, and recoverable coals distribute in the basin margin. Gas distributions in Lower and Upper Paleozoic have been controlled by the palaeokarsts formed in the late Caledonian to Hercynian fossil weathered crusts, and the widely distributed large braided river delta front sediments, respectively. The accumulation of coal has been controlled by the turning stage of tectonism and palaeoclimate, and the enrichment of uranium has been controlled by oxidation-reduction environment. The minerogenic evolutions of various energy resources in the basin are characterized by their obvious phasic development, and the commercial energy resources have been accumulated in a sequence of coal→uranium→gas→oil. Yishan slope area is favorable for exploration of oil, gas,coal and unconventional gas; Tianhuan depression and the thrust belts on the western edge of the basin are favorable for joint exploration of oil, gas,coal and uranium;Yimeng uplift and Weibei and Jinxi flexural fold belts are favorable for joint exploration of coal, coalbed methane and uranium.

Key words: oil, natural gas, coal, uranium, distribution, accumulation, comparison, joint exploration, Ordos basin

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