China Petroleum Exploration ›› 2015, Vol. 20 ›› Issue (3): 1-12.

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Exploration of Ordovician Subsalt Natural Gas Reservoirs in Ordos Basin

Yao Jingli1,2, Bao Hongping1,2, Ren Junfeng1,2, Sun Liuyi1,2,Ma Zhanrong1,2   

  1. 1 National Engineering Laboratory for Exploration & Development of Low Permeability Oil/Gas Fields
    2 Exploration and Development Research Institute of PetroChina Changqing Oilfield Company
  • Online:2015-05-15 Published:2015-05-22
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Abstract: Many sets of huge-thick Ordovician salt anhydrite deposits of Lower Paleozoic developed in the eastern part of Ordos Basin with good conditions for accumulations. Therefore, Ordovician subsalt has been a focus of important exploration area that comes under a continuous study. Tenacious efforts for exploration of Ordovician subsalt in Ordos Basin lead to some new theories, such as lateral hydrocarbon supply from source rock of Upper Paleozoic coal measures, accumulations of dolomite lithologic trap, and multi-layer abundance in regional lithologic facies changing belt.Based on guidance of new geological theories, a high-yield industrial gas flow of more than 1 million cubic meters per day was acquired from Ordovician subsalt Majiagou Formation in the central part of the basin, opening up another carbonate rock exploration field in the region and confirming the good exploration potential of Ordovician deep-layers.

 

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