铀矿冶2024，Vol.43Issue(3)：1-8,8.DOI:10.13426/j.cnki.yky.2024.02.02
高能气体致裂技术在低渗砂岩型铀矿地浸开采中的应用
Application of High Energy Gas Fracturing in In-situ Leaching of Low-permeable Sandstone Uranium Deposit
摘要
Abstract
Bayinqinggeli uranium deposit in the northern of the Ordos Basin is hosted in the lower sub-member,lower member of Zhiluo Formation,with an average uranium grade of 0.057 1％and an aver-age uranium mass per square meter of 6.69 kg/m2,but its permeability coefficient is only 0.065 m/d,which is a typical low-permeable sandstone uranium deposit.For this deposit,the well Z5,which has poor injection capacity,is selected to carry out the high energy gas fracturing experiments.The uranium deposit aquifer of the well is located at 619～639 m,and the depth of the propellant is placed at 632.5～637.4 m,626.6～631.6 m,620.6～625.6 m.The amount of the propellant is 40 kg for each time.At the same time of fracturing,microseismic monitoring is carried out around well Z5.There are 59,61 and 49 events generated by the fracturing of three times,and the event profiles show that the fractures formed in the reservoir are trending at 46.8°NW,31.0°NW and 72.3°N,respective-ly.After fracturing,the injection volume of well Z5 is significantly improved,with an increasement of 126.34％.The high energy gas fracturing can improve the permeability of the near-well area.It is easy to implement and the cost is low.关键词
地浸采铀/砂岩型铀矿/低渗透性/高能气体致裂/微地震监测/增渗Key words
in-situ leaching of uranium/sandstone uranium deposit/low permeability/high energy gas fracturing/microseismic monitoring/permeability enhancement分类
能源科技引用本文复制引用
张友澎,赵利信,王亚奴,霍建党,杨立志,侯春儒..高能气体致裂技术在低渗砂岩型铀矿地浸开采中的应用[J].铀矿冶,2024,43(3):1-8,8.基金项目
中核集团集中研发项目(鄂尔多斯盆地北部大型砂岩铀矿床地浸试验研究). （鄂尔多斯盆地北部大型砂岩铀矿床地浸试验研究）
