准噶尔盆地石南地区白垩系储层地球物理方法识别

doi:10.11720/wtyht.2024.1077

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Abstract

Industrial oil flows have been successively obtained from the basal conglomerates of the Cretaceous Qingshuihe Formation in the Shinan area, Junggar Basin. However, this set of reservoirs exhibits multi-layer three-dimensional oil-bearing properties and significant vertical and horizontal variations. Therefore, there is an urgent need to overcome the challenge of the identification and fine-scale characterization of reservoirs. Based on the accurate calibration of seismic and geological horizons, this study reconstructed the paleogeomorphology of the first member of the Cretaceous Qingshuihe Formation using based on the seismic flattening and residual thickness methods in three steps. By combining the reservoir prediction through natural gamma-ray pseudo-acoustic wave inversion, this study roughly identified the predominant factors controlling sedimentation and the spatial distributions of sand bodies. The results of this study provide an effective method combination for predicting Cretaceous reservoirs in the Shinan area. Furthermore, these results offer a sufficient scientific basis for oil and gas exploration in the glutenite reservoirs of the Cretaceous Qingshuihe Formation, thus effectively reducing the exploration risk.

Key words： 3D seismic data paleogeomorphology quasi-impedance reservoir prediction oil and gas exploration Junggar Basin

Received: 22 February 2023 Published: 16 April 2024

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	Articles by authors
	Lu-Lu LI
	Guo-Yu JIANG
	Tao LIU
	Yan HE
	Yong-Bo ZHANG

Cite this article:

Lu-Lu LI,Guo-Yu JIANG,Tao LIU, et al. Geophysical identification of Cretaceous reservoirs in the Shinan area, Junggar Basin[J]. Geophysical and Geochemical Exploration, 2024, 48(2): 334-341.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2024.1077 OR https://www.wutanyuhuatan.com/EN/Y2024/V48/I2/334

Tectonic unit division map of the Shinan area

Calibration profile of single well synthesis record of SHI103 well

Seismic profile of the Cretaceous Qingshuiying Formation in the Shinan area

Paleogeomorphological and sedimentary facies map of the Cretaceous Qingshuihe Formation sedimentary period in the Shinan area

Lithology-resistivity-original wave impedance intersection analysis diagram of Cretaceous Qingshuihe Formation in Shinan area

Lithology-resistivity-natural gamma (GR) mimic wave impedance intersection analysis of Cretaceous Qingshuihe Formation in the Shinan area

Reliability test results

Comparison chart of typical joint wells in the Shinan area

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