铀矿储层改造裂隙网络渗流模型参数优化研究  

Study on parameter optimization of fracture network seepage model for uranium reservoir reconstruction

作　　者：王奇智 王嘉纬 王伟[3,4] 袁维 牛庆合 王文 张春会[1,2] WANG Qizhi;WANG Jiawei;WANG Wei;YUAN Wei;NIU Qinghe;WANG Wen;ZHANG Chunhui(School of Civil Engineering,Hebei University of Science and Technology,Shijiazhuang,Hebei 050018,China;Innovation Center of Disaster Prevention and Mitigation Technology for Geotechnical and Structural Systems of Hebei Province,Shijiazhuang,Hebei 050018,China;Key Laboratory of Roads and Railway Engineering Safety Control,Ministry of Education(Shijiazhuang Tiedao University),Shijiazhuang,Hebei 050043,China;School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang,Hebei 050043,China)

机构地区：[1]河北科技大学,建筑工程学院,河北石家庄050018 [2]河北省岩土与结构体系防灾减灾技术创新中心,河北石家庄050018 [3]道路与铁道工程安全保障省部共建教育部重点实验室(石家庄铁道大学),河北石家庄050043 [4]石家庄铁道大学,土木工程学院,河北石家庄050043

出　　处：《岩石力学与工程学报》2024年第9期2152-2164,共13页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金资助项目(12372375);河北省自然科学基金资助项目(E2021210128);河北省教育厅科学研究项目资助(BJK2022010)。

摘　　要：铀矿储层改造过程中,爆破是提高低渗透铀矿储层渗透率的有效手段之一,爆破参数设计优化是影响爆破效果的关键因素。因此,首先设计三因素五水平的正交数值试验,基于模拟结果确定储层改造中与岩层参数相适应的微差爆破参数,研究不同爆破方式对储层改造裂隙网络生成效果的影响规律,综合多角度评判储层改造裂隙网络的优劣。并进行不同注液压力模拟试验,量化储层中溶浸液流量随时间的变化规律。结果表明,在微差时间为5 ms、爆破荷载峰值压力为5 GPa、压力上升时间为150μs的爆破参数组合下,储层渗透流量改造效果最优。该研究拓展了对铀矿储层改造的认识,为未来相关研究提供了重要参考。In the process of uranium reservoir reconstruction,blasting is one of the effective means to improve the permeability of low permeability uranium reservoir,and the design optimization of blasting parameters is the key factor affecting the blasting effect.Therefore,a three-factor and five-level orthogonal numerical test is designed firstly.Based on the simulation results,the millisecond blasting parameters suitable for rock parameters in reservoir reconstruction are determined.The influence of different blasting methods on the formation effect of fracture network in reservoir reconstruction is studied,and the advantages and disadvantages of fracture network in reservoir reconstruction are comprehensively evaluated from multiple angles.Subsequently,different injection pressure simulation tests are carried out to quantify the variation of the flow rate of the solution in the reservoir with time.The results show that under the combination of blasting parameters with a millisecond time of 5 ms,a peak pressure of blasting load of 5 GPa,and a pressure rise time of 150μs,the effect of reservoir seepage flow transformation is the best.This paper expands the understanding of uranium reservoir reconstruction and provides an important reference for future research.

关 键 词：采矿工程 储层改造 微差爆破 裂隙网络渗流 数值模拟 

分 类 号：TD85[矿业工程—金属矿开采]