安迪尔工区KT1孔成井全流程工艺实践及关键技术

Full-process well construction practice and key technologies for KT1 borehole in the Andir work area

摘要:

针对南疆塔克拉玛干沙漠腹地地下水资源勘查的战略需求，以安迪尔工区KT1勘探孔为工程载体，系统构建500 m深度“先取心、后成井”、分层抽水试验井全流程工艺体系，实现深部松散薄互层地层的精准识别、动态成井设计、高精度分层止水与Packer分层抽水试验一体化实施。通过岩心、测井、颗粒分析、易溶盐测试、抽水试验等多源信息融合，精准划分含水层系统，独立求取各层水文地质参数，揭示地下水垂向水质分异规律。实践表明，该工艺体系可有效破解沙漠区深孔钻探、粉细砂地层护壁、薄互层止水、低渗透层参数求取等技术难题，建成“一井多层”监测开采井，为干旱沙漠区地下水精准勘查提供可复制的技术范式与数据支撑，对边疆水资源安全保障具有重要意义。

Abstract:

In response to the strategic demand for groundwater resource exploration in the hinterland of the Taklamakan Desert in southern Xinjiang， this study takes exploration borehole KT1 in the Andir work area as the engineering carrier. A full-process technical system for 500 m-deep layered pumping test wells with the philosophy of "coring first， well completion later" is systematically established， enabling integrated implementation of accurate identification of deep loose thin interbedded strata， dynamic well design， high-precision layered water shutoff and Packer-based layered pumping tests. By integrating multi-source data including core samples， well logging， grain size analysis， soluble salt tests and pumping tests， the aquifer system is precisely delineated， hydrogeological parameters of each layer are obtained independently， and the vertical differentiation law of groundwater quality is revealed. Engineering practice demonstrates that the proposed technical system can effectively tackle technical challenges including deep borehole drilling in desert areas， borehole wall stabilization in silty-fine sand strata， water shutoff for thin interbeds， and parameter acquisition for low-permeability layers. A multi-aquifer monitoring and production well is constructed， providing a replicable technical paradigm and data support for precise groundwater exploration in arid desert regions， and carrying great significance for water resource security in border areas.