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Characteristics of Hydrocarbon Accumulation in the Paleozoic Donghetang Formation in the Southwestern Tahe Area
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This research was supported by State Key Laboratory of Petroleum Reservoir Geology and Reservoir Engineering and partly by Northwest Bureau of Petroleum of SINOPEC.


Characteristics of Hydrocarbon Accumulation in the Paleozoic Donghetang Formation in the Southwestern Tahe Area
Author:
  • ZHOU Wen

    ZHOU Wen

    1 State Key Laboratory of Petroleum Reservoir Geology and Reservoir Engineering, Chengdu University of Technology, Chengdu, Sichuan 610059, China;2 Drilling and Oil Recovery Research Institute, Sichuan Petroleum Administrator Bureau, Guanghan, Sichuan 618300, China
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  • ZHAO Guanjun

    ZHAO Guanjun

    1 State Key Laboratory of Petroleum Reservoir Geology and Reservoir Engineering, Chengdu University of Technology, Chengdu, Sichuan 610059, China;2 Drilling and Oil Recovery Research Institute, Sichuan Petroleum Administrator Bureau, Guanghan, Sichuan 618300, China
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  • LIU Fei

    LIU Fei

    1 State Key Laboratory of Petroleum Reservoir Geology and Reservoir Engineering, Chengdu University of Technology, Chengdu, Sichuan 610059, China;2 Drilling and Oil Recovery Research Institute, Sichuan Petroleum Administrator Bureau, Guanghan, Sichuan 618300, China
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  • YE Bin

    YE Bin

    1 State Key Laboratory of Petroleum Reservoir Geology and Reservoir Engineering, Chengdu University of Technology, Chengdu, Sichuan 610059, China;2 Drilling and Oil Recovery Research Institute, Sichuan Petroleum Administrator Bureau, Guanghan, Sichuan 618300, China
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  • LI Xiuhua

    LI Xiuhua

    1 State Key Laboratory of Petroleum Reservoir Geology and Reservoir Engineering, Chengdu University of Technology, Chengdu, Sichuan 610059, China;2 Drilling and Oil Recovery Research Institute, Sichuan Petroleum Administrator Bureau, Guanghan, Sichuan 618300, China
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  • HUANG Tingting

    HUANG Tingting

    1 State Key Laboratory of Petroleum Reservoir Geology and Reservoir Engineering, Chengdu University of Technology, Chengdu, Sichuan 610059, China;2 Drilling and Oil Recovery Research Institute, Sichuan Petroleum Administrator Bureau, Guanghan, Sichuan 618300, China
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  • ZHOU Qiumei

    ZHOU Qiumei

    1 State Key Laboratory of Petroleum Reservoir Geology and Reservoir Engineering, Chengdu University of Technology, Chengdu, Sichuan 610059, China;2 Drilling and Oil Recovery Research Institute, Sichuan Petroleum Administrator Bureau, Guanghan, Sichuan 618300, China
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  • DONG Guoliang

    DONG Guoliang

    1 State Key Laboratory of Petroleum Reservoir Geology and Reservoir Engineering, Chengdu University of Technology, Chengdu, Sichuan 610059, China;2 Drilling and Oil Recovery Research Institute, Sichuan Petroleum Administrator Bureau, Guanghan, Sichuan 618300, China
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Fund Project:

This research was supported by State Key Laboratory of Petroleum Reservoir Geology and Reservoir Engineering and partly by Northwest Bureau of Petroleum of SINOPEC.

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    摘要:

    The ancient structure characteristic, correlation of the oil and the hydrocarbon source rock characteristics, hydrocarbon migration trace, types and conditions of traps, migration passages and characteristic of hydrocarbon accumulation are researched in this paper. It is shown through the analysis that two main large tectonic activities after the Early Hercynian orogeny resulted in different tectonic patterns in the study area. Two main hydrocarbon infills occurred in the Donghetang Formation, the first occurred in the Early Hercynian resulting in the ancient hydrocarbon accumulation in the northern Tahe, the second infill was a large amount that occurred in places beneficial for hydrocarbon accumulation, such as structural traps and structural-stratigraphic traps formed in the Early Himalayan orogeny after migration along the faults through source rocks and other passages. Before the earlier period of the Himalayan orogeny, the petroleum mainly migrated to the north, whereas petroleum migrated to the south and southeast because of the structural reverse in the Himalayan orogeny, so the middle and later period of the Himalayan orogeny is the key period for hydrocarbon accumulation. The model of “oil generation formed early, hydrocarbon accumulation controlled by the faults through source rocks and structures formed late” is proposed. It is pointed out that the south of the research area is currently the beneficial district for hydrocarbon accumulation, which provides the basis for future petroleum exploration.

    Abstract:

    The ancient structure characteristic, correlation of the oil and the hydrocarbon source rock characteristics, hydrocarbon migration trace, types and conditions of traps, migration passages and characteristic of hydrocarbon accumulation are researched in this paper. It is shown through the analysis that two main large tectonic activities after the Early Hercynian orogeny resulted in different tectonic patterns in the study area. Two main hydrocarbon infills occurred in the Donghetang Formation, the first occurred in the Early Hercynian resulting in the ancient hydrocarbon accumulation in the northern Tahe, the second infill was a large amount that occurred in places beneficial for hydrocarbon accumulation, such as structural traps and structural-stratigraphic traps formed in the Early Himalayan orogeny after migration along the faults through source rocks and other passages. Before the earlier period of the Himalayan orogeny, the petroleum mainly migrated to the north, whereas petroleum migrated to the south and southeast because of the structural reverse in the Himalayan orogeny, so the middle and later period of the Himalayan orogeny is the key period for hydrocarbon accumulation. The model of “oil generation formed early, hydrocarbon accumulation controlled by the faults through source rocks and structures formed late” is proposed. It is pointed out that the south of the research area is currently the beneficial district for hydrocarbon accumulation, which provides the basis for future petroleum exploration.

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ZHOU Wen, ZHAO Guanjun, LIU Fei, YE Bin, LI Xiuhua, HUANG Tingting, ZHOU Qiumei, DONG Guoliang.2011. Characteristics of Hydrocarbon Accumulation in the Paleozoic Donghetang Formation in the Southwestern Tahe Area[J]. ACTA GEOLOGICA SINICA(English edition),85(4):899~910

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  • 收稿日期:2011-01-01
  • 最后修改日期:2011-03-30
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