地震多属性技术组合在泸州页岩气区块构造解释中的综合应用

doi:10.11720/wtyht.2022.1575

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Abstract

The Luzhou shale gas block,which is located in the southern Sichuan Basin,has undergone multi-stage tectonic evolution and has complex faults and multiple sets of vertical detachment layers,forming the characteristics of multiple stages,multiple strikes,and multiple layers.To overcome the difficulties with the tectonic interpretation of the study area,this study combined a set of seismic multi-attribute techniques,namely using seismic multi-attribute optimization and attribute fusion technique to assist fault interpretation,using structural anomaly attribute to identify microstructures,using seismic attribute slicing technique to analyze the characteristics of tectonic temporal and spatial evolution,and using multi-superposition ant tracking attribute technique to predict fracture development.Using this technique combination,this study completed the fine-scale interpretation of complex faults in the area, effectively characterized the development of microstructures,clarified the tectonic stages and distribution in the area,improved the fracture prediction accuracy,and described the development characteristics of fractures.The results of this study will provide solid data and a foundation for the next platform deployment.

Key words： seismic multi-attribute attribute fusion structural anomaly attribute strata slicing ant tracking

Received: 01 November 2021 Published: 03 January 2023

ZTFLH:

P631.4

Corresponding Authors: XIE Qing-Hui E-mail: chengs@petrochina.com.cn;qxie2@slb.com

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	Geng-Sheng CHEN
	Qing-Hui XIE
	Jian-Fa WU
	Chun-Duan ZHAO
	Er-Si XU
	Yuan-Wei PAN

Cite this article:

Geng-Sheng CHEN,Qing-Hui XIE,Jian-Fa WU, et al. Comprehensive application of the seismic multi-attribute technique combination in the tectonic interpretation of the Luzhou shale gas block[J]. Geophysical and Geochemical Exploration, 2022, 46(6): 1349-1358.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2022.1575 OR https://www.wutanyuhuatan.com/EN/Y2022/V46/I6/1349

Application of seismic multi-attribute combination technology in Luzhou block

Seismic attribute slides attracted along target surface
a—variance attribute;b—maximum curvature attribute;c—edge detection attribute;①—fault No.1;②—fault No.2

Seismic multi-attribute fusion slices extracted along the target surface
a—fusion attribute slice by maximum curvature attribute and edge detection attribute;b—superimposed map by fault polygons and fusion attribute slice;①—fault No.1;②—fault No.2

Structural anomaly attribute slice extracted along the target surface

Structural anomaly attribute slices extracted along the target surface

Ant tracking slices extracted along the target surfaces
a—aggressive ant tracking slice;b—slice of aggressive and passive superimposed ant tracking;c—fig.a local enlargement;d—fig.b local enlargement

Comparison of ant tracking results around wells with the maximum curvature and structural anomaly attributes
a—maximum curvature attribute around L₁/L₂;b—maximum curvature attribute around L₃;c—maximum curvature attribute around L₄;d—anomaly attribute around L₁/L₂;e—anomaly attribute around L₃;f—anomaly attribute around L₄;g—ant tracking attribute around L₁/L₂;h—ant tracking attribute around L₃;i—ant tracking attribute around L₄

Fracture rose diagram of electrical imaging logging

Faults extracted with a certain time window along the target surface
a—extraction result of faults with ant tracking attributes greater than -0.5;b—extraction result of faults with ant tracking attributes greater than -0.9;c—partial enlarged view

Statistical analysis chart of fracture characteristics in the study area
a—fracture inclination histogram;b—fracture trend rose diagram;c—fracture length histogram

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