Geological Theory and Practice of Petroleum Exploration in the Ordos Basin

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  • 1.PetroChina Changqing Oilfield Company,Xi′an 710018, China; 2.National Engineering Laboratory for Exploration and Development of Low-Permeability Oil and Gas Fields,Xi′an 710018, China
     

Received date: 2013-08-13

  Revised date: 2013-11-27

  Online published: 2013-12-10

Abstract

The Mesozoic Yanchang Formation mainly develops “low permeability,low pressure,low abundance” reservoirs,which is controlled by high quality source rocks and large sand body.In exploration practices,the traditional theoretical knowledge and exploration ideas made breakthrough,and the exploration theory in low permeability reservoirs also had constant innovation and improvement.The accumulation models,including meandering river delta,braided river delta,multi-layer and composite,the middle part of depression lake basin and tight oil,initiate a new situation of oil exploration.Guided by the meandering river delta accumulation theory,large oil-bearing region with geological reserves more than 1 billion tons have been found in the north Shanxi area.Based on the accumulation model of braided river deltas in southwest,monoblock oilfield has been discovered in eastern Gansu province,which has geological reserves more than 1 billion ton.According to the multiple layer compound accumulation model,more than 1.5 billion tons geological reserves had been found in Jiyuan area.With the central lake accumulation model of inland depression basin,the exploration obtained a significant breakthrough in Huaqing area.With the advancement of tight oil geological research and technological breakthrough,new scaled reserve replacement area has been formed in the Ordos Basin.Based on the geological theory innovation,key technology breakthrough,systematic exploration and development implementation,and development mode change,it enhanced the integrated exploration benefit of “three low” oil and gas fields,solid the resource foundation of the rapid development of low permeability oil and gas fields,and achieved huge economic and social benefits.
 

Cite this article

FU Jin-hua,LI Shi-xiang,LIU Xian-yang . Geological Theory and Practice of Petroleum Exploration in the Ordos Basin[J]. Natural Gas Geoscience, 2013 , 24(6) : 1091 -1101 . DOI: 10.11764/j.issn.1672-1926.2013.06.1091

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