Oil & Gas Geology ›› 2013, Vol. 34 ›› Issue (4): 441-449.doi: 10.11743/ogg20130403

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Possibility of formation of deep basin gas reservoirs in the Denglouku Formation of Gulong-Changjiaweizi region, northern Songliao Basin

Zhang Lei1, Zhang Xuejuan1, Lu Shuangfang1, Yang Zhiru2   

  1. 1. College of Earth Science, Northeast Petroleum University, Daqing, Heilongjiang 163318, China;
    2. Bureau of Geophysical Prospecting, CNPC, Zhuozhou, Hebei 072751, China
  • Received:2012-09-19 Revised:2013-07-11 Online:2013-08-28 Published:2013-08-27

Abstract: The Denglouku Formation in Gulong-Changjiaweizi region is still immature in petroleum exploration,especially for tight sand gas.Based on a systematic analysis of gas accumulation conditions in respects of source rock,reservoir and preservation and a comparison with the basic accumulation conditions of deep basin gas reservoir,we discussed the f possibility of formation of deep basin gas reservoir in the Denglouku Formation of Gulong-Changjiaweizi region.The results show that the 2nd member of Dengkouku Fm (K1d2) and its conterminous layers in Gulong-Changjiaweizi region have favorable geological conditions for the accumulation of deep basin gas,including tight sandstone reservoirs with low porosity and low permeability,abundant and continuous gas charging,stable and gentle structural background as well as close superimposition of source rocks and reservoirs.Therefore,the Gulong-Changjiaweizi region could be favorable for accumulation of deep basin gas in the northern Songliao Basin.The K1d2 and its conterminous layers within the effective gas generation area of K1d2 source rock and its periphery may be the major target for future deep basin gas exploration.

Key words: accumulation condition, deep basin gas reservoir, Denglouku Formation, Gulong-Changjiaweizi region, Song-liao Basin

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