辽东湾北部地区混合沉积特征及地球物理响应

吴奎; 惠冠洲; 高京华; 加东辉

doi:10.3799/dqkx.2020.213

Volume 45 Issue 10

Nov. 2020

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Article Navigation > Earth Science > 2020 > 45(10): 3589-3602

Wu Kui, Hui Guanzhou, Gao Jinghua, Jia Donghui, 2020. Mixed Sediment Characteristics and Geophysical Responses in Northern Area of Liaodong Bay, Bohai Bay Basin. Earth Science, 45(10): 3589-3602. doi: 10.3799/dqkx.2020.213

Citation:

Wu Kui, Hui Guanzhou, Gao Jinghua, Jia Donghui, 2020. Mixed Sediment Characteristics and Geophysical Responses in Northern Area of Liaodong Bay, Bohai Bay Basin. Earth Science, 45(10): 3589-3602. doi: 10.3799/dqkx.2020.213

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Mixed Sediment Characteristics and Geophysical Responses in Northern Area of Liaodong Bay, Bohai Bay Basin

doi: 10.3799/dqkx.2020.213

Tianjin Branch of China National Offshore Oil Corporation Limited, Tianjin 300459, China

Received Date: 2020-05-21
Publish Date: 2020-11-17

Abstract

Abstract

Mixed sediments have the dual characteristics of clastic rocks and carbonate rocks, but no effective identification method for mixed sedimentary reservoirs has been established. Based on the analysis of the development background and petrological characteristics of mixed sediments in the northern area of Liaodong Bay, the mixed sediments are divided into three types:terrigenous clastic type, biogenic carbonate type and chemical precipitated carbonate type. In addition, facies and pattern of the three types of mixed sediments are defined. Based on the cross-analysis of the physical parameters for different types, it is concluded that the biogenic carbonate type has the characteristics of medium-low to medium-high P-wave velocity, low density, and low P-wave impedance, the chemical precipitation carbonate type and terrigenous clastic type have the characteristics of medium-high P-wave, high density, and high P-wave impedance, with P-wave impedance and density as the sensitive parameters to distinguish the mixed sediments of different types. Through seismic forward modeling and real seismic data response comparison, it is found that mixed sediment strata were effected by strong low frequency energy shielding underlying buried hill formation in the area of north Liaodong Bay Shahejie Formation. In this paper, it applies an innovative matching pursuit method to the top of the buried hill to suppress strong reflection, on the basis of which lithologic sensitive parameters are predicted, effectively improving the recognition ability of the Shahejie Formation of mixed sediment strata.
- Liaodong Bay,
- mixed sediment,
- geophysical responses,
- matching pursuit,
- sedimentation

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References(46)

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