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Article Navigation >  Acta Sedimentologica Sinica  > 2015  >  33(5): 1023-1032

ZHAO Yang, YAO JingLi, DUAN Yi, WU YingZhong, CAO XiXi, XU Li, CHEN ShanShan. Oil-source Analysis for Chang-9 Subsection (Upper Triassic) of Eastern Gansu Province in Ordos Basin[J]. Acta Sedimentologica Sinica, 2015, 33(5): 1023-1032. doi: 10.14027/j.cnki.cjxb.2015.05.018
Citation: ZHAO Yang, YAO JingLi, DUAN Yi, WU YingZhong, CAO XiXi, XU Li, CHEN ShanShan. Oil-source Analysis for Chang-9 Subsection (Upper Triassic) of Eastern Gansu Province in Ordos Basin[J]. Acta Sedimentologica Sinica, 2015, 33(5): 1023-1032. doi: 10.14027/j.cnki.cjxb.2015.05.018
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Oil-source Analysis for Chang-9 Subsection (Upper Triassic) of Eastern Gansu Province in Ordos Basin

doi: 10.14027/j.cnki.cjxb.2015.05.018
  • 1.

    Key Laboratory of Petroleum Resources Research of Gansu Province/ Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Lanzhou 730000;

  • 2.

    University of Chinese Academy of Sciences, Beijing 100049;

  • 3.

    Exploration and Development Institute of Changqing Oilfield Company, CNPC, Xian 710018;

  • 4.

    Northwest Branch, Research Institute of Petroleum Exploration and Development, PetroChina, Lanzhou 730020;

  • 5.

    The Second Oil Production Plant of SINOPEC North China Company, Yanchi, Ningxia 751500

  • Received Date: 2014-07-23
  • Rev Recd Date: 2014-11-20
  • Publish Date: 2015-10-10
  • The problem of oil-source for Chang-9 subsection of eastern Gansu province in Ordos Basin is one of factors which restrict the process of exploration in the area. In order to solve it, the genesis of the crude oil from the Chang-9 is firstly studied by geochemical testing data of the crude oil. The similar geochemical characteristic of Chang-7 source rock and Chang-9 source rock results lead to that it is hard to evaluate the contribution of the two kinds of source rock to the Chang-9 reservoir. So the correlation coefficients and the category relations between the crude oil and the two kinds of source rock are calculated and analized by some sensitive biomarker parameters on the basis of Cluster Analysis Theory, at the same time the migration pathways of the crude oil are put forward in combination with geology datas. This study shows that the crude oil is mature and formed under weak oxidation-weak deoxidation environment of freshwater lakes, of which matrixes are mainly from aquatic organisms and higher plant. Furthermore, the crude oil is mostly derived from Chang-7 source rock and from the Chang-9 source rock partially. The crude oil migrates along with directon of NE-SW. It is the great ability of hydrocarbon-generation and hydrocarbon-expulsion, good migration pathway and available sandstones distribution that play a critical role in forming Chang-9 reservoir.
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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Publishing history
  • Received:  2014-07-23
  • Revised:  2014-11-20
  • Published:  2015-10-10

Oil-source Analysis for Chang-9 Subsection (Upper Triassic) of Eastern Gansu Province in Ordos Basin

doi: 10.14027/j.cnki.cjxb.2015.05.018
  • 1. Key Laboratory of Petroleum Resources Research of Gansu Province/ Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Lanzhou 730000;
  • 2. University of Chinese Academy of Sciences, Beijing 100049;
  • 3. Exploration and Development Institute of Changqing Oilfield Company, CNPC, Xian 710018;
  • 4. Northwest Branch, Research Institute of Petroleum Exploration and Development, PetroChina, Lanzhou 730020;
  • 5. The Second Oil Production Plant of SINOPEC North China Company, Yanchi, Ningxia 751500
  • Received Date: 2014-07-23
  • Rev Recd Date: 2014-11-20
  • Publish Date: 2015-10-10

Abstract: The problem of oil-source for Chang-9 subsection of eastern Gansu province in Ordos Basin is one of factors which restrict the process of exploration in the area. In order to solve it, the genesis of the crude oil from the Chang-9 is firstly studied by geochemical testing data of the crude oil. The similar geochemical characteristic of Chang-7 source rock and Chang-9 source rock results lead to that it is hard to evaluate the contribution of the two kinds of source rock to the Chang-9 reservoir. So the correlation coefficients and the category relations between the crude oil and the two kinds of source rock are calculated and analized by some sensitive biomarker parameters on the basis of Cluster Analysis Theory, at the same time the migration pathways of the crude oil are put forward in combination with geology datas. This study shows that the crude oil is mature and formed under weak oxidation-weak deoxidation environment of freshwater lakes, of which matrixes are mainly from aquatic organisms and higher plant. Furthermore, the crude oil is mostly derived from Chang-7 source rock and from the Chang-9 source rock partially. The crude oil migrates along with directon of NE-SW. It is the great ability of hydrocarbon-generation and hydrocarbon-expulsion, good migration pathway and available sandstones distribution that play a critical role in forming Chang-9 reservoir.

ZHAO Yang, YAO JingLi, DUAN Yi, WU YingZhong, CAO XiXi, XU Li, CHEN ShanShan. Oil-source Analysis for Chang-9 Subsection (Upper Triassic) of Eastern Gansu Province in Ordos Basin[J]. Acta Sedimentologica Sinica, 2015, 33(5): 1023-1032. doi: 10.14027/j.cnki.cjxb.2015.05.018
Citation: ZHAO Yang, YAO JingLi, DUAN Yi, WU YingZhong, CAO XiXi, XU Li, CHEN ShanShan. Oil-source Analysis for Chang-9 Subsection (Upper Triassic) of Eastern Gansu Province in Ordos Basin[J]. Acta Sedimentologica Sinica, 2015, 33(5): 1023-1032. doi: 10.14027/j.cnki.cjxb.2015.05.018
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