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Experiment and Mechanism Analysis on Threshold Pressure Gradient with Different Fluids
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Abstract
Fluids with different components were used in threshold pressure gradient (TPG) experiment by steady "pressure~velocity" method. Influence of Permeability and fluids components on TPG was analyzed. The study indicates different fluids give different TPG versus permeability power function, TPG of different fluids was as follows: Distilled water >Injected water >Formation water >Surfactant solution. Mechanism analysis of TPG reduction shows that higher salinity and Surfactant are favorable to TPG reduction, and it offers a theoretical explanation for injection of formation water and surfactant solution in the low permeability reservoir. The injection of the two fluids can decrease injection pressure and increase injection capacity for water wells.
Title: Experiment and Mechanism Analysis on Threshold Pressure Gradient with Different Fluids
Description:
Abstract
Fluids with different components were used in threshold pressure gradient (TPG) experiment by steady "pressure~velocity" method.
Influence of Permeability and fluids components on TPG was analyzed.
The study indicates different fluids give different TPG versus permeability power function, TPG of different fluids was as follows: Distilled water >Injected water >Formation water >Surfactant solution.
Mechanism analysis of TPG reduction shows that higher salinity and Surfactant are favorable to TPG reduction, and it offers a theoretical explanation for injection of formation water and surfactant solution in the low permeability reservoir.
The injection of the two fluids can decrease injection pressure and increase injection capacity for water wells.
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