水平定向钻进技术在青海钾盐矿开采中的应用研究

Application of horizontal directional drilling technology in the exploitation of a potash mine， Qinghai Province

摘要:

为了提高青海某钾盐矿的开采效率和产量，提出了贯通井的开采方案，首次利用水平定向钻进技术和对接井技术施工了多组贯通井，从水平井注水后从竖井抽取卤水，极大地提高了钾盐的开采量。工程施工初期出现了卡钻事故，通过优化泥浆配方、钻头合理选择、防卡钻钻具的设计使用，避免了卡钻事故的再次发生。该工程完成40条水平井和竖井的对接后，该区域内的钾盐年产量提高3.5万t，证明利用水平定向钻进技术提高钾盐矿开采效率和产量的方案是可行的。相关研究成果可为后续利用水平定向钻进技术进行可溶性矿产开采提供理论依据和实践指导。

Abstract:

In order to improve the mining efficiency and output of a potash mine in Qinghai province， the mining scheme of through wells is put forward， after water injection from horizontal wells， brine is extracted from vertical wells， which greatly increases the production of potassium salts. The sticking accident occurred in the initial stage of construction， which was perfectly avoided by optimizing mud formula， reasonable selection of bit and design of anti-sticking drilling tool. After the completion of 40 horizontal and vertical wells， the annual output of potash in this area has increased by 35000 tons， which proves that the scheme of using horizontal directional drilling technology to improve the efficiency and output of potash mining is feasible！ The related research results can provide theoretical basis and practical guidance for the subsequent use of horizontal directional drilling technology for soluble mineral exploitation.