Recently, a saturated brine drilling fluid for deep-well salt brine mineral exploration and its preparation method, jointly completed by the Shandong Lubei Geological Engineering Exploration Institute, Jilin University, and the Dongying Municipal Land and Resources Bureau, was granted an invention patent by the National Intellectual Property Administration. This is the institute's first invention patent, following its acquisition of five utility model patents.

This invention provides a saturated brine drilling fluid with temperature resistance and salt resistance, as well as good rheological properties, filtration properties, and inhibition. It can overcome the adverse effects on drilling fluid performance caused by complex environments such as high temperature and high-concentration inorganic salts during deep-well salt mine construction. Its performance remains stable under high-temperature conditions, and it can effectively prevent the dissolution and erosion of salt brine well walls and cores during core drilling.

This invention is suitable for deep-well salt brine mineral exploration and can effectively solve problems such as well wall collapse, borehole diameter shrinkage, and drill pipe sticking during drilling.