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Article Navigation >  Acta Sedimentologica Sinica  > 2005  >  23(1): 162-169

SHI Ji-an, ZHAO Xin, WANG Jin-peng, WANG Qi, LU Long-fei, WANG Lei, WANG You-xiao. Geochemical Character istics of Oil Sand Extracts in Different State from Sandstone Reservoir: Ⅰ linear hydrocarbon———A case study from Triassic Yanchang Formation in Ordos basin[J]. Acta Sedimentologica Sinica, 2005, 23(1): 162-169.
Citation: SHI Ji-an, ZHAO Xin, WANG Jin-peng, WANG Qi, LU Long-fei, WANG Lei, WANG You-xiao. Geochemical Character istics of Oil Sand Extracts in Different State from Sandstone Reservoir: Ⅰ linear hydrocarbon———A case study from Triassic Yanchang Formation in Ordos basin[J]. Acta Sedimentologica Sinica, 2005, 23(1): 162-169.
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Geochemical Character istics of Oil Sand Extracts in Different State from Sandstone Reservoir: Ⅰ linear hydrocarbon———A case study from Triassic Yanchang Formation in Ordos basin

  • 1.

    Key Laboratory of Geochemistry, Lanzhou Institute of Geology, Chinese Academy of Sciences, Lanzhou 730000;

  • 2.

    Graduate school of Chinese Academy of Sciences, Beijing 100039

  • Received Date: 2004-07-17
  • Rev Recd Date: 2004-11-10
  • Publish Date: 2005-03-10
  • Through the stepwise separation and extract on free hydrocarbon, sealed hydrocarbon, hydrocarbon in carbonate cement, bounded hydrocarbon and inclusion hydrocarbon within quartz grain on six oil sand samp les from Yanchang Fm. (Triassic), Xifeng oilfield, Ordos basin, all these hydrocarbons have been analyzed by GC-MS. On the basis of diagenetic sequence, in combination with the feature of the analyzed samples, the results show that thismethod is practicable. And the study on linear alkane with different existence states shows the nalkaneswith single peak are dominant in the study area with wide range of carbon number and weaker odd-carbon preference. The parentmaterial types of these hydrocarbons are typeⅠ-Ⅱkerogen deposited in the reducing fresh water lacustrine environment.Obvious differences occur in Pr /Ph ratio and CP I value in these hydrocarbonswith different existence state. Generally, it has a decreasing tendency from free hydrocarbon, sealed hydrocarbon, cement hydrocarbon to inclusion hydrocarbon, togetherwith their group composition features, this phenomena can reflect the oil generation step s and filling periods of oil pool and microscale heterogeneity within oil pools.
  • [1] 1 潘长春,傅家谟,盛国英. 塔里木库车坳陷含油、气储集岩连续抽提和油、气包裹体分析[J].Chinese Science Bulletin,2000,(Z1):2750-2757.

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    11 杨俊杰,裴锡古. 中国天然气地质学(卷四)[M].北京:石油工业出版社,1996.

    12 《长庆油田石油地质志》编写组. 中国石油地质志(卷十二,长庆油田)[M].北京:石油工业出版社,1992.

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    14 史基安,王金鹏,毛明陆. 鄂尔多斯盆地西峰油田三叠系延长组长6-8段储层砂岩成岩作用研究[J].沉积学报,2003,(03):373-381.

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  • Received:  2004-07-17
  • Revised:  2004-11-10
  • Published:  2005-03-10

Geochemical Character istics of Oil Sand Extracts in Different State from Sandstone Reservoir: Ⅰ linear hydrocarbon———A case study from Triassic Yanchang Formation in Ordos basin

  • 1. Key Laboratory of Geochemistry, Lanzhou Institute of Geology, Chinese Academy of Sciences, Lanzhou 730000;
  • 2. Graduate school of Chinese Academy of Sciences, Beijing 100039
  • Received Date: 2004-07-17
  • Rev Recd Date: 2004-11-10
  • Publish Date: 2005-03-10

Abstract: Through the stepwise separation and extract on free hydrocarbon, sealed hydrocarbon, hydrocarbon in carbonate cement, bounded hydrocarbon and inclusion hydrocarbon within quartz grain on six oil sand samp les from Yanchang Fm. (Triassic), Xifeng oilfield, Ordos basin, all these hydrocarbons have been analyzed by GC-MS. On the basis of diagenetic sequence, in combination with the feature of the analyzed samples, the results show that thismethod is practicable. And the study on linear alkane with different existence states shows the nalkaneswith single peak are dominant in the study area with wide range of carbon number and weaker odd-carbon preference. The parentmaterial types of these hydrocarbons are typeⅠ-Ⅱkerogen deposited in the reducing fresh water lacustrine environment.Obvious differences occur in Pr /Ph ratio and CP I value in these hydrocarbonswith different existence state. Generally, it has a decreasing tendency from free hydrocarbon, sealed hydrocarbon, cement hydrocarbon to inclusion hydrocarbon, togetherwith their group composition features, this phenomena can reflect the oil generation step s and filling periods of oil pool and microscale heterogeneity within oil pools.

SHI Ji-an, ZHAO Xin, WANG Jin-peng, WANG Qi, LU Long-fei, WANG Lei, WANG You-xiao. Geochemical Character istics of Oil Sand Extracts in Different State from Sandstone Reservoir: Ⅰ linear hydrocarbon———A case study from Triassic Yanchang Formation in Ordos basin[J]. Acta Sedimentologica Sinica, 2005, 23(1): 162-169.
Citation: SHI Ji-an, ZHAO Xin, WANG Jin-peng, WANG Qi, LU Long-fei, WANG Lei, WANG You-xiao. Geochemical Character istics of Oil Sand Extracts in Different State from Sandstone Reservoir: Ⅰ linear hydrocarbon———A case study from Triassic Yanchang Formation in Ordos basin[J]. Acta Sedimentologica Sinica, 2005, 23(1): 162-169.
shu

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