Testing methodology to monitor the on-set of solid acid hydrolysis using sonic waves
AssigneeSaudi Arabian Oil Company
InventorMohammad H. Alqam
Life of this patent
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Abstract
A method for testing solid acid hydrolysis in a formation. The method includes introducing a test sample into a test cell, where the test sample includes an upper structure, a lower structure, and a solid acid disposed between the upper and lower structures. The pressure and temperature of the test cell are increased to simulate downhole conditions. A velocity of an acoustic p-wave and/or acoustic s-wave is through the test sample is measured while the temperature is increasing from an initial temperature to a final temperature. A temperature of onset of solid acid hydrolysis based on the measured velocity is determined.
Claims20
A method for testing solid acid hydrolysis in a formation, comprising:
- introducing a test sample into a test cell, wherein the test sample comprises an upper structure, a lower structure, and a solid acid disposed between the upper and lower structures;
- increasing a pressure of the test cell;
- increasing a temperature of the test cell;
- measuring a velocity of an acoustic p-wave and/or acoustic s-wave through the test sample while the temperature is increasing from an initial temperature to a final temperature;
- and
- determining a temperature of onset of solid acid hydrolysis based on the measured velocity.
A method for characterizing solid acid hydrolysis in a formation, comprising:
- introducing a solid acid into a test cell between an upper wafer and a lower wafer;
- increasing a pressure of the test cell;
- increasing a temperature of the test cell;
- measuring one or more of an acoustic wave velocity, a displacement between the upper wafer and the lower wafer or a volume of fluid displaced from the test cell as the temperature is increasing from an initial temperature to a final temperature;
- and
- characterizing the solid acid hydrolysis based on one or more of the measured velocity, the measured displacement or the measured volume.
A system for qualitative measurement of solid acid hydrolysis, the system comprising:
- a test chamber for receiving a test sample comprising a top wafer, a bottom wafer, and a composition comprising a solid acid therebetween;
- at least one piston for applying an axial stress to the test sample;
- an acoustic wave generator configured to generate and pass an acoustic wave through the test sample;
- an acoustic wave sensor configured to measure a property of the acoustic wave passed through the test sample.
Dependencies are inferred from the claim text.