The Research and Evaluation of Double Excitation Inorganic Adjustable Plugging Agent

Determine the best formula of the double excitation inorganic adjustable plugging agent: 15% slag + 0.8% activator + 4% dispersant + 2.5% retarder, with a curing time of 32h, and a curing strength over 1.4Mpa. The initial viscosity of adjustable plugging agent is 36mPa.s, and after curing for eighteen hours in 85 degrees Celsius , viscosity is less than 320mPa.s. For cores with different permeability, the water plugging rate of adjustable plugging agent is more than 90%.