| In the mining process of fluid ore, the liquid we used in order to obtain high yield and liquid conduction force fracturing measures.
The perfance requirements of the fluid: high viscosity, good lubricity, low filtration, low friction, non-clogging, no pollution and damage for the fluid layer that is fracturing, good thermal stability and shear stability perfance, low residue, good compatibility, gum broken quickly, supply wide, facilitate preparation and low price.
Fracturing fluid can be divided into: A water-based fracturing fluid, B oil base fracturing fluid, C. Emulsified fracturing fluid, D. Pure gas fracturing fluid.
Reservoir hydraulic fracturing process is using high-pressure displacement pump on the ground, use the liquid pressure transmission principle, will have a certain viscosity of liquid, the absorptive capacity greater than the reservoir pressure injected into the reservoir and the pressure of wellbore will increased gradually, and thus hold back from the high pressure at the bottom, when this pressure is greater than around the bore to stress and the fation rock tensile strength, cracks will be at the bottom near the stratigraphic, continue to inject the proppant sand-carrying fluid to cracks extended forward and fill the proppant, shut-crack closure on the proppant, which fed in the bottom of the well near the strata fill with a certain geometric dimensions and high conductivity sand cracks, making the well to increase production by injection purposes. |
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