Research and Application of Measures for the Transformation Technology of Bedrock Reservoirs in the Kuntey Structure

The bedrock reservoir in the Kunteyi well area of Qaidam Basin, Qinghai Province, is buried over 7,000 m deep and has a reservoir temperature of 200 ° C, featuring extreme high temperature and high pressure. Especially the field application of ultra-high temperature 200 °C reservoir modification technology is very rare in China. Among them, the K1–1 well has a reservoir depth of 7,288 m, a well temperature of 205 °C and a formation pressure of 117 MPa. It is the deepest and warmest bedrock reservoir in China, and there is no successful development experience of similar oil and gas reservoirs at home and abroad. The dual difficulties of ultra-high temperature acidification and fracturing pose a significant challenge to the field test. Engineers, based on their previous understanding of the Quentin block measures, conducted a feasibility test on the basis of the initial acidification construction. Ultimately, the second layer group of K1–1 completed the fracturing operation using combined density fracturing fluid, combined proppant, and proppant multi-stage plugging. The successful transformation of the ultra-deep bedrock reservoir represents a significant breakthrough in the process technology. While verifying the development potential of ultra-deep oil and gas in China, it also provides reference for the efficient transformation of similar reservoirs in the country.