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

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.