Measuring and testing – Borehole or drilling – Fluid flow measuring or fluid analysis
Patent
1995-05-01
1997-04-15
Chilcot, Richard
Measuring and testing
Borehole or drilling
Fluid flow measuring or fluid analysis
7315239, E21B 4700
Patent
active
056211708
ABSTRACT:
The "Tank Test" method for determining well tests in low pressured reservoirs utilizes gravity drainage from a water storage tank to inject water into the reservoir. The Tank Test eliminates the need for expensive pumping equipment and the required manual pump rate adjustments. The low costs associated with the Tank Test allows the test to be run for a longer duration so that a greater portion of the reservoir can be investigated. The duration of the test and thus the radius investigation can be extended by repeatedly refilling the tank as necessary. The Tank Test also reduces the possibility of fracturing the reservoir during injection tests in low permeability reservoirs. The primary criteria for performing a tank test is that the hydrostatic head from the tank to the formation be greater than the reservoir pressure. In addition, the Tank Test minimize stress effects on stress sensitive formations.
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Chilcot Richard
Gas Research Institute
Patel Harshad
LandOfFree
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