基于离散裂缝网络的多段压裂注入诱发断层滑移及震级评估方法

doi:10.3799/dqkx.2026.221

基于离散裂缝网络的多段压裂注入诱发断层滑移及震级评估方法

doi: 10.3799/dqkx.2026.221

易昕政^1,2,3,
刘福深^1,2,3, ,,
张芳雪⁴,
严一熙^4,5,
雷伟鑫^1,2,3,
陈云枫⁴,
石许华^4,5,
陈汉林^4,5

1. 浙江大学滨海和城市岩土工程研究中心, 浙江杭州 310058;
2. 浙江大学岩土工程计算中心, 浙江杭州 310058;
3. 全省地下空间开发利用重点实验室, 浙江杭州 310058;
4. 浙江大学地球科学学院, 浙江杭州 310058;
5. 教育部含油气盆地构造研究中心, 浙江杭州 310058

基金项目:

国家自然科学基金项目(No.42577162,No.52179112)

详细信息

作者简介:
易昕政(2001-),男,硕士研究生,主要从事水力压裂诱发地震研究.ORCID:0009-0004-9099-0438.E-mail:xinzheng_yi06@zju.edu.cn

通讯作者:
刘福深,研究员,博士生导师,长期从事深地岩土工程领域的研究.ORCID:0000-0002-3451-2341.E-mail:fushenliu@zju.edu.cn

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出版历程
- 收稿日期: 2026-03-08
- 网络出版日期: 2026-08-25

Fault Slip and Seismic Magnitude Assessment During Multi-Stage Hydraulic Fracturing Injection Based on Discrete Fracture Networks

Yi Xinzheng^1,2,3,
Liu Fushen^{1,2,3
, ,},
Zhang Fangxue⁴,
Yan Yixi^4,5,
Lei Weixin^1,2,3,
Chen Yunfeng⁴,
Shi Xuhua^4,5,
Chen Hanlin^4,5

1. Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou, Zhejiang 310058, China;
2. Computing Center for Geotechnical Engineering, Zhejiang University, Hangzhou, Zhejiang 310058, China;
3. Zhejiang Key Laboratory of the Development and Utilization of Underground Space, Hangzhou, Zhejiang 310058, China;
4. School of Earth Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China;
5. Structural Research Centre of Oil and Gas Bearing Basin of Ministry of Education, Hangzhou, Zhejiang 310058, China

摘要

摘要: 水力压裂是非常规油气高效开发的关键技术，但注入流体引起的流体压力扩散与应力重分布可能诱发断层滑移，当其转变为失稳滑移时，将引发地震。现有研究多聚焦单段压裂或单个大断层，在全井尺度上表征随机天然裂缝网络的非线性滑移行为及其震级响应的研究相对不足。本文采用了流固耦合摩擦接触有限元法，利用罚函数方法模拟裂缝面库仑摩擦接触，采用显-隐式迭代求解策略，可实现全井多段压裂过程中裂缝的张开、闭合及剪切滑移行为的高效求解。应用该方法结合实际工程地质数据引入随机离散裂缝网络(Discrete Fracture Network ，DFN)模型，分析流体压力与应力场的时空演化特征，估测随机裂缝滑移位置及其滑移量，明确诱发地震空间分布和能量耗散演化规律，进而估算地震震级。基于能量耗散概念提出了区域总地震矩评价指标，并揭示了摩擦系数、地应力差及裂缝数量等因素对该指标的影响规律。进一步定量阐明了多段压裂过程中的段间压力累积机制，指出其是驱动天然裂缝持续滑移并频繁诱发地震活动的主要原因。本研究可为全井尺度压裂注入诱发断层滑移与地震风险评估提供有效的基于物理机制的分析方法。
- 断层滑移 /
- 随机离散裂缝网络 /
- 地震震级 /
- 多段压裂诱发地震
Abstract: Hydraulic fracturing is a key technology for the efficient development of unconventional oil and gas resources. However, fluid pressure diffusion and stress redistribution induced by fluid injection may trigger fault slip, and seismic events can occur once the slip evolves into unstable failure. Existing studies have primarily focused on single-stage fracturing or individual large-scale faults, whereas relatively limited attention has been devoted to the characterization of nonlinear slip behavior and associated seismic magnitude responses of stochastic natural fracture networks at the full-well scale. In this study, a hydro-mechanically coupled frictional contact finite element method is developed to investigate fracture slip and induced seismicity during multi-stage hydraulic fracturing. Coulomb frictional contact along fracture surfaces is modeled using a penalty-function approach, while an explicit-implicit iterative solution strategy is adopted to efficiently capture fracture opening, closure, and shear slip behaviors throughout the entire multi-stage fracturing process. Based on realistic geological and engineering data, a stochastic Discrete Fracture Network (DFN) model is incorporated into the numerical framework. The spatiotemporal evolution of pore pressure and stress fields is analyzed, and the locations and magnitudes of stochastic fracture slip are quantitatively evaluated. Furthermore, the spatial distribution of induced seismicity and the evolution of energy dissipation are characterized, enabling estimation of the corresponding seismic magnitudes. A regional total seismic moment index is proposed based on the concept of energy dissipation, and the effects of friction coefficient, in-situ stress difference, and fracture density on this index are systematically investigated. In addition, the pressure accumulation mechanism between fracturing stages is quantitatively clarified, and the results indicate that it is the primary driving factor for sustained slip of natural fractures and frequent induced seismic events during multi-stage hydraulic fracturing. This study provides an effective physics-based approach for evaluating fault slip and seismic risks induced by full-well hydraulic fracturing operations.
- fault slip /
- stochastic discrete fracture network /
- seismic magnitude /
- Multi-stage hydraulic fracturing-induced seismicity

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参考文献(48)

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基于离散裂缝网络的多段压裂注入诱发断层滑移及震级评估方法

doi: 10.3799/dqkx.2026.221

作者简介: 易昕政(2001-),男,硕士研究生,主要从事水力压裂诱发地震研究.ORCID:0009-0004-9099-0438.E-mail:xinzheng_yi06@zju.edu.cn

通讯作者: 刘福深,研究员,博士生导师,长期从事深地岩土工程领域的研究.ORCID:0000-0002-3451-2341.E-mail:fushenliu@zju.edu.cn

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出版历程

Fault Slip and Seismic Magnitude Assessment During Multi-Stage Hydraulic Fracturing Injection Based on Discrete Fracture Networks

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出版历程

目录

作者简介:
易昕政(2001-),男,硕士研究生,主要从事水力压裂诱发地震研究.ORCID:0009-0004-9099-0438.E-mail:xinzheng_yi06@zju.edu.cn

通讯作者:
刘福深,研究员,博士生导师,长期从事深地岩土工程领域的研究.ORCID:0000-0002-3451-2341.E-mail:fushenliu@zju.edu.cn