Oil & Gas Geology ›› 2008, Vol. 29 ›› Issue (4): 479-484,501.doi: 10.11743/ogg20080410

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Analysis on groundwater hydrodynamic systems of the Mesozoic in the central Ordos Basin

Wang Xiaomei1,2, Wang Zhenliang2   

  1. 1. School of Petroleum Resources, Xi'an Shiyou University, Xi'an, Shaanxi 710065, China;
    2. State Key Laboratory of Continental Dynamics, Northwest University, Xi'an, Shaanxi 710069, China
  • Received:2008-02-06 Online:2008-08-24 Published:2012-01-16

Abstract:

Groundwater serves as the carrier for hydrocarbon migration.The modes of groundwater occurrence have an effect on hydrocarbon migration,accumulation,and distribution in a basin.Therefore,a correct division of groundwater hydrodynamic systems can be a useful guidance for hydrocarbon exploration and development. The analyses of the present groundwater pressure field,geochemical field and stable isotope features of the Mesozoic (T3y-K) in central Ordos Basin revealed three kinds of groundwater hydrodynamic systems of various characteristics.They are the relative open zone in the shallower part,the transitional zone in the middle part,and the relative confining zone in the deeper part.The relative confining zone in the deeper part has the most favorable conditions for hydrocarbon preservation and can be the target for future exploration.

Key words: gravity flow, compaction flow, dynamic system, groundwater, Mesozoic, Ordos Basin

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