▎ 摘　　要

NOVELTY - Plugging method involves sampling the polyamine water-based drilling fluid base slurry, and adding high temperature resistant reservoir plugging agent to some of the base slurry samples and stirring evenly to make a drilling fluid plugging slurry. The plugging performance evaluation test of the leakage slurry. According to the results of the plugging performance evaluation test, calculating the range of the high temperature resistant reservoir plugging agent added to the total amount of drilling fluid circulation. According to the principle from low to high, determining the amount of plugging agent for high temperature resistant reservoir this time, and dispersing the high temperature resistant reservoir plugging agent evenly in the drilling fluid through the mud mixing funnel within one cycle of drilling fluid. After the high temperature resistant reservoir plugging agent is added, determining drilling fluid continues to circulate in the wellbore for two cycles. USE - Plugging method used for nano-micron developed shale pores (Claimed). ADVANTAGE - Determining the addition of the plugging agent according to the principle from low to high, and uniformly dispersing the plugging agent in the drilling fluid within one cycle, after the addition is finished, the drilling fluid is continuously circulated for two circulation weeks, if the consumption of the drilling fluid per meter is more than or equal to 0.08 cubic meter per meter, the step is returned, and the addition of the plugging agent is increased and if the consumption per meter is less than 0.08 cubic meter per meter, confirming that the effective plugging is realized on the reservoir. DETAILED DESCRIPTION - Plugging method involves equipping with polyamine water-based drilling fluid base slurry suitable for shale. Using polyamine water-based drilling fluid base slurry to establish drilling fluid circulation, and then starting the drilling tool to continue drilling downhole. When the consumption per meter of drilling fluid is greater than 0.2 m3/m (cubic meter per meter), judging that leakage occurs downhole, and the reservoir depth is determined. Sampling the polyamine water-based drilling fluid base slurry, and adding high temperature resistant reservoir plugging agent to some of the base slurry samples and stirring evenly to make a drilling fluid plugging slurry. The plugging performance evaluation test of the leakage slurry. According to the results of the plugging performance evaluation test, calculating the range of the high temperature resistant reservoir plugging agent added to the total amount of drilling fluid circulation. According to the principle from low to high, determining the amount of plugging agent for high temperature resistant reservoir this time, and dispersing the high temperature resistant reservoir plugging agent evenly in the drilling fluid through the mud mixing funnel within one cycle of drilling fluid. After the high temperature resistant reservoir plugging agent is added, determining drilling fluid continues to circulate in the wellbore for two cycles, and then the consumption of drilling fluid per meter. If the consumption per meter of drilling fluid is greater than or equal to 0.08 m3/m, go back to above step and increase the amount of plugging agent for high temperature resistant reservoirs, if the consumption per meter of drilling fluid is less than 0.08 m3/m, confirm that the reservoir is effectively plugged. DESCRIPTION OF DRAWING(S) - The drawing shows a comparison chart of the pressure transfer curves of different plugging agents.