Oil & Gas Geology ›› 2012, Vol. 33 ›› Issue (3): 385-391,398.doi: 10.11743/ogg20120307

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Possibility of tight sand gas reservoirs in Jixi Basin

Wang Weiming1, Lu Shuangfang1, Wang Shihui2, Liu Shi’en3, Wang Guilei1, Mu Guodong1, Jiang Siqin4, Xu Jianjun5   

  1. 1. Northeast Petroleum University, Daqing, Heilongjiang 163318, China;
    2. Petroleum Exploration and Development Institute, PetroChina Daqing Oilfield Company, Daqing, Heilongjiang 163000, China;
    3. Chengde Petroleum College, Chengde, Hebei 067000, China;
    4. No.6 Oil Production Plant, PetroChina Daqing Oilfield Company, Daqing, Heilongjiang 163114, China;
    5. Xinmu Oil Production Plant, PetroChina Jinlin Oilfield Company, Songyuan, Jilin 138000, China
  • Received:2011-12-29 Revised:2012-04-10 Online:2012-06-28 Published:2012-07-10

Abstract:

Jixi Basin is still immature in petroleum exploration,especially for tight sand gas.Based on summarizing accumulation conditions of tight sand gas reservoirs at home and abroad,we discussed the tight sand gas accumulation conditions in Jixi Basin in respects of structure,source rock and reservoir.According to the geoche-mical data of the dark mudstone samples of Ji D8 well,the tight sand gas resources was estimated by the method of chemical kinetics.The results show that Jixi Basin is a small rifted basin featuring in multiple-cyclic tectonic evolution and rapid deposition.Its tight gas geological conditions are quite different from the large tight sand gas reservoirs in North America.However,large-scale coalbeds in the Chengzihe Formation in Jixi Basin provide abundant gas source for the tight sand gas reservoirs.Superimposition and closely contact of source rocks and re-servoir are also in favor of the migration and accumulation of gas.Sweet spots of tight sand gas may exist in the tectonically stable region of the central depression in Jixi Basin.

Key words: chemical kinetics, hydrocarbon accumulation, resource potential, faulted basin, tight sand gas, Jixi Basin

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