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Article Navigation >  Acta Sedimentologica Sinica  > 2019  >  37(4): 661-673

YANG Xue, LIU Bo, ZHANG JinChuan, HUO ZhiPeng. Identification of Sedimentary Responses to the Milankovitch Cycles in the K2qn1 Formation, Gulong Depression[J]. Acta Sedimentologica Sinica, 2019, 37(4): 661-673. doi: 10.14027/j.issn.1000-0550.2018.178
Citation: YANG Xue, LIU Bo, ZHANG JinChuan, HUO ZhiPeng. Identification of Sedimentary Responses to the Milankovitch Cycles in the K2qn1 Formation, Gulong Depression[J]. Acta Sedimentologica Sinica, 2019, 37(4): 661-673. doi: 10.14027/j.issn.1000-0550.2018.178
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Identification of Sedimentary Responses to the Milankovitch Cycles in the K2qn1 Formation, Gulong Depression

doi: 10.14027/j.issn.1000-0550.2018.178
  • 1.

    School of Energy Resources, China University of Geosciences(Beijing), Beijing 100083, China;

  • 2.

    Key Laboratory of Strategy Evaluation for Shale Gas, Ministry of Land and Resources, China University of Geosciences(Beijing), Beijing 100083, China;

  • 3.

    Accumulation and Development of Unconventional Oil and Gas, State Key Laboratory Cultivation Base Jointly-constructed by Heilongjiang Province and the Ministry of Science and Technology, Northeast Petroleum University, Daqing, Heilongjiang 163318, China

Funds:  Heilongjiang Province Young Innovative Talents Training Program for General Undergraduate Schools, No. UNPYSCT-2015077; Research on Shale Gas Resource Potential Evaluation Method and Exploration Technology, No. 2016ZX05034
  • Received Date: 2018-08-08
  • Rev Recd Date: 2018-10-09
  • Publish Date: 2019-08-10
  • The great thickness of deep-water fine-grained sedimentary rock in the K2qn Lake,Songliao Basin,offers the potential for very large-scale unconventional oil and gas exploration. Spectral analysis and wavelet analysis were used in a study of the Milankovitch cycle recorded in the K2qn1 Formation. The sedimentary paleoenvironment and its response to the Milankovitch cycle for the deep-lake facies in the Gulong Depression,Songliao Basin,were analyzed by whole-rock X-ray diffraction to determine geochemical elemental data. The formation responses to the Milankovitch cycle were established,revealing four-stage Milankovitch cycles in the K2qn1 Formation:68 meter-scale cyclic se-quences,25 level-V Milankovitch cycle sequences,6 level-IV Milankovitch cycle sequences,with one stage-Ⅲ cy-cle sequence interface. The lacustrine sedimentation in the K2qn1 Formation was mainly controlled by a short-term ec-centricity of 128 ka and a slope of 48 ka. The sedimentation environment indicates that the climate changed from dry to wet,with increasing water depth,reductive enhancement,and decreasing salinity. The combination of the six envi-ronments indicates the relationship between the thick shale lithology and the sedimentary environment. The layered gray mudstone deposited in a warm, humid climate is conducive to the development of oil shale formation.
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  • Received:  2018-08-08
  • Revised:  2018-10-09
  • Published:  2019-08-10

Identification of Sedimentary Responses to the Milankovitch Cycles in the K2qn1 Formation, Gulong Depression

doi: 10.14027/j.issn.1000-0550.2018.178
  • 1. School of Energy Resources, China University of Geosciences(Beijing), Beijing 100083, China;
  • 2. Key Laboratory of Strategy Evaluation for Shale Gas, Ministry of Land and Resources, China University of Geosciences(Beijing), Beijing 100083, China;
  • 3. Accumulation and Development of Unconventional Oil and Gas, State Key Laboratory Cultivation Base Jointly-constructed by Heilongjiang Province and the Ministry of Science and Technology, Northeast Petroleum University, Daqing, Heilongjiang 163318, China
Funds:  Heilongjiang Province Young Innovative Talents Training Program for General Undergraduate Schools, No. UNPYSCT-2015077; Research on Shale Gas Resource Potential Evaluation Method and Exploration Technology, No. 2016ZX05034
  • Received Date: 2018-08-08
  • Rev Recd Date: 2018-10-09
  • Publish Date: 2019-08-10

Abstract: The great thickness of deep-water fine-grained sedimentary rock in the K2qn Lake,Songliao Basin,offers the potential for very large-scale unconventional oil and gas exploration. Spectral analysis and wavelet analysis were used in a study of the Milankovitch cycle recorded in the K2qn1 Formation. The sedimentary paleoenvironment and its response to the Milankovitch cycle for the deep-lake facies in the Gulong Depression,Songliao Basin,were analyzed by whole-rock X-ray diffraction to determine geochemical elemental data. The formation responses to the Milankovitch cycle were established,revealing four-stage Milankovitch cycles in the K2qn1 Formation:68 meter-scale cyclic se-quences,25 level-V Milankovitch cycle sequences,6 level-IV Milankovitch cycle sequences,with one stage-Ⅲ cy-cle sequence interface. The lacustrine sedimentation in the K2qn1 Formation was mainly controlled by a short-term ec-centricity of 128 ka and a slope of 48 ka. The sedimentation environment indicates that the climate changed from dry to wet,with increasing water depth,reductive enhancement,and decreasing salinity. The combination of the six envi-ronments indicates the relationship between the thick shale lithology and the sedimentary environment. The layered gray mudstone deposited in a warm, humid climate is conducive to the development of oil shale formation.

YANG Xue, LIU Bo, ZHANG JinChuan, HUO ZhiPeng. Identification of Sedimentary Responses to the Milankovitch Cycles in the K2qn1 Formation, Gulong Depression[J]. Acta Sedimentologica Sinica, 2019, 37(4): 661-673. doi: 10.14027/j.issn.1000-0550.2018.178
Citation: YANG Xue, LIU Bo, ZHANG JinChuan, HUO ZhiPeng. Identification of Sedimentary Responses to the Milankovitch Cycles in the K2qn1 Formation, Gulong Depression[J]. Acta Sedimentologica Sinica, 2019, 37(4): 661-673. doi: 10.14027/j.issn.1000-0550.2018.178
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