地震属性与地质力学联合的裂缝建模技术及裂缝有效性分析——以四川盆地涪陵地区侏罗系页岩为例

doi:10.11720/wtyht.2025.0051

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Abstract

The distribution of fractures influences the trajectory design of shale gas horizontal wells and the stimulation effectiveness of hydraulic fractures. Faults and joints serve as two types of fractures. Accordingly, this study proposed the seismic attribute-geomechanics integrated fracture modeling technology. Specifically, fault modeling is conducted using seismic attributes, and joint prediction is performed using geomechanical structural restoration and Mohr-Coulomb theory. The obtained results of faults and joints are then integrated into the discrete fracture network (DFN) modeling for spatial characterization of natural tectonic fractures. The proposed technology was applied to the exploration of Jurassic lacustrine shales in the Fuling area within the Sichuan Basin. Its fracture modeling results were consistent with the imaging log interpretation results, confirming the development zones and spatial distribution patterns of fractures. Moreover, the stimulation effectiveness of fracturing was evaluated by comparing the fracture modeling results of typical wells with the actual fracturing performance. The evaluation results indicate that tensile fractures that are vertical or oblique to well trajectories are favorable for fracturing. Overall, the results of this study hold positive implications for predicting fracture development zones and guiding horizontal well trajectory design in the exploration stage, serving as a reference for subsequent exploration deployment.

Key words： fracture modeling seismic attribute Mohr-Coulomb failure criterion discrete fracture network (DFN) modeling

Received: 06 March 2025 Published: 30 December 2025

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	Articles by authors
	Jiang-Hui ZHOU
	Xiao-Jing LIU
	Chen-Hao XIONG
	Xin HU
	Yi-Ming WU

Cite this article:

Jiang-Hui ZHOU,Xiao-Jing LIU,Chen-Hao XIONG, et al. Seismic attribute-geomechanics integrated fracture modeling technology and fracture effectiveness analysis: A case study of the Jurassic shales in the Fuling area, Sichuan Basin[J]. Geophysical and Geochemical Exploration, 2025, 49(6): 1271-1280.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2025.0051 OR https://www.wutanyuhuatan.com/EN/Y2025/V49/I6/1271

Forward modeling results with different fault displacements and folding degrees

Principle diagram for predicting the possibility of rock fracture

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Principle diagram of UVT coordinate conversion (modifird according to reference [8])

Forward model with different degrees of folding and geomechanical fracture modeling result

Fracture modeling result of the the oretical model

Analysis approach of fracture based on seismic attributes and geomechanics fracture modeling

Seismic attributes and imaging logging maps of Lianggaoshan Formation and Dongyue Temple section

Geomechanical fractures in the Lianggaoshan Formation and Dongyue Temple section

Comparison between fracture modeling results of Lianggaoshan Formation in Fuxing Region and FMI imaging logging of typical wells

Typical well fracture modeling and microseismic comparison diagram

Bar chart of stages and microseismic events

Typical horizontal shale gas well fracture modeling and microseismic superposition diagram of fracturing communication fault type

Typical well fracture modeling and microseismic superposition diagram without faults around the well

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