新疆石油地质

新疆石油地质 ›› 2017, Vol. 38 ›› Issue (zk(English) ): 53-59.

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Conditions of Oil and Gas Accumulation in Qingshuihe Formation of Shinan Area, Junggar Basin

QU Jianhua1, WU Tao1, FEI Liying1, ZENG Delong1, ZHOU Liping2, LIU Zhenyu1   

  1. 1. Research Institute of Exploration and Development, Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang 834000, China;
    2. Urumqi Branch, Geophysical Research Institute, BGP, CNPC, Urumqi, Xinjiang 830016, China
  • 收稿日期:2017-09-26 修回日期:2017-11-07 出版日期:2018-01-01 发布日期:2021-05-19

Conditions of Oil and Gas Accumulation in Qingshuihe Formation of Shinan Area, Junggar Basin

QU Jianhua1, WU Tao1, FEI Liying1, ZENG Delong1, ZHOU Liping2, LIU Zhenyu1   

  1. 1. Research Institute of Exploration and Development, Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang 834000, China;
    2. Urumqi Branch, Geophysical Research Institute, BGP, CNPC, Urumqi, Xinjiang 830016, China
  • Received:2017-09-26 Revised:2017-11-07 Online:2018-01-01 Published:2021-05-19
  • About author:QU Jianhua,E-mail: qujianh@petrochina.com.cn

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摘要： In order to expand the prospecting achievements in Cretaceous strata of Shinan area in Junggar Basin, stratigraphic classification and hydrocarbon accumulation condition analysis are re-performed for the Qingshuihe Formation by the comprehensive use of seismic forward modeling, seismic inversion and seismic attribute etc. Both sedimentary cycle and well logging curves are used to determine the marker bed, based on which a unified framework of the whole area is established through the integration of well data and seismic data, and the ancient landform during the deposition of the first member of the Qingshuihe Formation is characterized. Gullies developed in Shinan area control the distribution of sedimentary facies and high-quality reservoirs are found in the down-incised scour channels. Reservoir prediction and hydrocarbon detection can prove that high-quality reservoir with a floor is the first condition for oil and gas accumulation and oil-bearing sand body is the favorable target for drilling. Multiple favorable targets are determined by using density inversion and seismic attribute fusion methods, which reveals the good oil and gas exploration prospects in the area.

关键词: Junggar Basin, Shinan area, Qingshuihe Formation, oil and gas accumulation

Abstract: In order to expand the prospecting achievements in Cretaceous strata of Shinan area in Junggar Basin, stratigraphic classification and hydrocarbon accumulation condition analysis are re-performed for the Qingshuihe Formation by the comprehensive use of seismic forward modeling, seismic inversion and seismic attribute etc. Both sedimentary cycle and well logging curves are used to determine the marker bed, based on which a unified framework of the whole area is established through the integration of well data and seismic data, and the ancient landform during the deposition of the first member of the Qingshuihe Formation is characterized. Gullies developed in Shinan area control the distribution of sedimentary facies and high-quality reservoirs are found in the down-incised scour channels. Reservoir prediction and hydrocarbon detection can prove that high-quality reservoir with a floor is the first condition for oil and gas accumulation and oil-bearing sand body is the favorable target for drilling. Multiple favorable targets are determined by using density inversion and seismic attribute fusion methods, which reveals the good oil and gas exploration prospects in the area.

Key words: Junggar Basin, Shinan area, Qingshuihe Formation, oil and gas accumulation