Sequential coupling thermal-hydro-mechanical model for multiple cluster of fracturing network fracturing in dry hot rock reservoir

CHEN Shaoying; WANG Wei; YANG Qingchun; ZHANG Lisong

doi:10.13809/j.cnki.cn32-1825/te.2022.06.005

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Sequential coupling thermal-hydro-mechanical model for multiple cluster of fracturing network fracturing in dry hot rock reservoir

更新时间：2025-12-05

- Sequential coupling thermal-hydro-mechanical model for multiple cluster of fracturing network fracturing in dry hot rock reservoir
- Petroleum Reservoir Evaluation and Development Vol. 12, Issue 6, Pages: 869-876(2022)
- 作者机构：
  
  中国石油大学（华东）储运与建筑工程学院,山东,青岛,266580
- 作者简介：
- 基金信息：
- DOI：10.13809/j.cnki.cn32-1825/te.2022.06.005
  CLC： TE319
- Published：2022
- 稿件说明：
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CHEN Shaoying, WANG Wei, YANG Qingchun, et al. Sequential coupling thermal-hydro-mechanical model for multiple cluster of fracturing network fracturing in dry hot rock reservoir[J]. Petroleum Reservoir Evaluation and Development, 2022, 12(6): 869-876.
DOI：

CHEN Shaoying, WANG Wei, YANG Qingchun, et al. Sequential coupling thermal-hydro-mechanical model for multiple cluster of fracturing network fracturing in dry hot rock reservoir[J]. Petroleum Reservoir Evaluation and Development, 2022, 12(6): 869-876. DOI： 10.13809/j.cnki.cn32-1825/te.2022.06.005.

摘要

针对干热岩储层压裂的热流固耦合模型计算复杂且难以实现大规模多簇缝网压裂模拟的问题，提出了一种干热岩压裂顺序耦合模拟方法，建立了单簇裂缝和多簇缝网的裂缝扩展热流固顺序耦合模型，实现了大规模干热岩多簇缝网压裂的热流固顺序耦合模拟。利用多簇缝网热流固顺序耦合模型讨论了地层温度、干热岩脆性指数、应力场、排量等关键参数对多簇缝网扩展的影响。模拟结果表明：较高的温差、较大的岩石脆性指数以及较大的注入排量能促进缝网的扩展，而较大的应力差不利于缝网的扩展。

Abstract

In order to solve the problem that thermal-hydro-mechanical coupling model of hot-dry-rock（HDR） reservoir fracturing is complex and it is difficult to achieve large-scale multiple cluster of fracturing network simulation

a sequential coupling simulation method of HDR fracturing is proposed. By establishing a fracture expansion thermodynamic solid sequential coupling model of single cluster fracture and multi-cluster fracture network

the thermal-hydro-mechanical sequential coupling simulation of large-scale HDR fracture network is realized. The influence of brittleness index

stress field displacement and other key parameters on the propagation of fracture network are analyzed in this model. The results showed that high temperature difference

large brittleness index and large injection pumpage could promote the propagation of fracture network

but large stress difference is not conducive to the propagation of fracture network.

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