Lithologic Reservoirs ›› 2007, Vol. 19 ›› Issue (4): 27-33.doi: 10.3969/j.issn.1673-8926.2007.04.005

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Geological techniques for Triassic lithologic reservoirs in Ordos Basin

MAO Min-lu, YANG Yajuan, ZHANG Yan   

  1. Research Institute of Petroleum Exploration and Development, Changqing Oilfield Company,PetroChina, Xi’an 710021, China)
  • Online:2007-12-15 Published:2007-12-15

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Abstract:

Lithologic reservoirs of Triassic Yanchang Formation of Mesozoic in Ordos Basin are characterized by low and extra- low permeability, which is famous for fracturing treatment. Geological techniques applied in deposition and reservoir genetic factors analysis are studied from the aspect of practicability. Several simple and practical geological methods are selected and developed, which include the analysis methods for structural setting and basin tectonic type in well developed deposition, source origin, depositional environment dominated by rock texture, sequence stratigraphy of continental facies lake basin, sequence and plays. These geological techniques will take a significant part in studying accumulation rules for lithologic reservoirs. Good results have been achieved in the practical application in Ordos Basin.

Key words: differential thrust, strike- slip fault, lithology, hydrocarbon accumulation, Taibei Sag

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