干热岩储层多簇缝网压裂热流固顺序耦合模型研究

陈劭颖; 王伟; 杨清纯; 张立松

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

油气藏评价与开发 >

2022 , Vol. 12 >Issue 6: 869 - 876

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

地热开发与利用

干热岩储层多簇缝网压裂热流固顺序耦合模型研究

陈劭颖 ,
王伟 ,
杨清纯 ,
张立松

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中国石油大学（华东）储运与建筑工程学院，山东青岛 266580

陈劭颖（1996—），女，在读硕士研究生，从事岩石力学相关工作。地址：山东省青岛市黄岛区中国石油大学（华东），邮政编码：266555。E-mail：1277709783@qq.com

收稿日期: 2022-07-01

网络出版日期: 2022-12-02

基金资助

山东省自然科学基金“基于YADE种群平衡法的原始储层条件下煤岩破碎—块体滑落—井眼坍塌演化机理研究”(ZR2021ME024);中央高校基本科研业务费专项基金“基于种群平衡法的破碎性煤层钻井眼坍塌细观演化机理”(19CX02034A)

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

Shaoying CHEN ,
Wei WANG ,
Qingchun YANG ,
Lisong ZHANG

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College of Pipeline and Civil Engineering, China University of Petroleum（East China）, Qingdao, Shandong 266580, China

Received date: 2022-07-01

Online published: 2022-12-02

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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。

关键词： 水力压裂; 干热岩储层; 热流固耦合; 多簇缝网; 数值模拟

本文引用格式

陈劭颖 , 王伟 , 杨清纯 , 张立松 . 干热岩储层多簇缝网压裂热流固顺序耦合模型研究[J]. 油气藏评价与开发, 2022 , 12(6) : 869 -876 . DOI: 10.13809/j.cnki.cn32-1825/te.2022.06.005

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.

Key words： hydraulic fracturing; hot-dry-rock（HDR） reservoir; thermal-fluid-solid coupling; multiple cluster of fracturing network; numerical simulation

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