Feasibility Study to Evaluate the Effects of Cavitation Mixing Upon the Pumpability and Strength Characteristics of Cements for Geothermal Applications. Final Report

摘要

Two on-line emulsification techniques were evaluated as potential systems for preparation of geothermal cement. The objective of the program was met through the demonstrated feasibility and enhanced material properties by cavitation emulsification of geothermal cements. A standard mixing technique for preparing two types of geothermal cements, a lightweight and a heavyweight, was supplemented in a laboratory environment using either of two cavitation mixing techniques. The density and viscosity of the respective slurries and the compressive strength of the corresponding set cements, which were cured at elevated temperature and pressure, were measured to compare the effects of the supplemental techniques with that produced by the established method alone. The test results indicated an enhanced improvement in the compressive strength of the lightweight emulsified cement. The lightweight emulsified cement also showed an increase in the room temperature density. The room temperature viscocity of the emulsified lightweight cement was initially improved. The emulsification of the heavyweight cement had little effect on the material properties. (ERA citation 08:038848)