Using resistivity measurements to monitor the reaction kinetics between acids and carbonate rocks
AssigneeSchlumberger Technology Corporation
InventorsXiangdong Qiu, Abdul Muqtadir Mohammed, Mustapha Abbad, Reza Taherian
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Abstract
In an embodiment a method is described which includes emplacing a sample within a measurement cell, wherein two or more electrodes are configured in the measurement cell; introducing a reactive fluid into the measurement cell; reacting the sample with the reactive fluid, wherein reacting the sample with the reactive fluid results in a change in an ion concentration in the reactive fluid; and measuring the resistivity of the reactive fluid using the two or more electrodes, wherein the resistivity is proportional to the ion concentration in the reactive fluid.
Claims20
A method comprising:
- placing a rock sample within an interior volume of a measurement cell, wherein two or more electrodes are disposed in the interior volume of the measurement cell;
- introducing a reactive fluid into the interior volume of the measurement cell;
- reacting the rock sample with the reactive fluid in the interior volume of the measurement cell, wherein reacting the rock sample with the reactive fluid results in a change in an ion concentration in the reactive fluid in the interior volume of the measurement cell;
- and
- measuring resistivity of the reactive fluid in the interior volume of the measurement cell using the two or more electrodes, wherein the resistivity of the reactive fluid is dependent on reaction of the rock sample with the reactive fluid, and wherein the resistivity of the reactive fluid is proportional to the ion concentration in the reactive fluid.
A method comprising:
- placing a sample material within an interior volume of a measurement cell, wherein two or more electrodes are disposed in the interior volume of the measurement cell, and wherein a reacting fluid is in the cell and maintains contact with the two or more electrodes;
- introducing a reactive fluid into the interior volume of the measurement cell;
- reacting the rock sample with the reactive fluid in the interior volume of the measurement cell, wherein reacting the rock sample with the reacting fluid results in release of ions from the rock sample causing a change in an ion concentration in the reacting fluid in the interior volume of the measurement cell due to release of the ions from the rock sample ;
- and
- measuring resistivity of the reacting fluid in the interior volume of the measurement cell using the two or more electrodes, wherein the resistivity of the reacting fluid is dependent on reaction of the rock sample with the reacting fluid, and wherein the resistivity of the reacting fluid is proportional to the ion concentration in the reacting fluid;
- and
- using the measured resistivity to calculate conductivity and relevant reaction rates between the sample material and reactive fluid.
Dependencies are inferred from the claim text.