High-temperature high-pressure foam liquid dynamic filtration evaluation system and method

Abstract

The invention relates to a high-temperature high-pressure foam liquid dynamic filtration evaluation system and method. A filtration system comprises a filtration chamber and a stirrer, wherein a paddle-type stirrer is mounted in the filtration chamber; bubbled liquid and gas are mixed fully and uniformly, and meanwhile, the foam liquid is driven to rotate and move relative to the surface of a rock core; the filtration chamber is connected with a gas supercharging device and a heating device respectively; the gas supercharging device can ensure the filtration pressure in the filtration chamber to keep stable; a gas-liquid separator is connected with the outlet end of a back-pressure valve; the gas-liquid separator is connected with a gas metering device and a liquid metering device respectively. The high-temperature high-pressure foam liquid dynamic filtration evaluation system and method provided by the invention have the advantages that the system is scientific and reasonable in design, the evaluation method is accurate, and higher creativity is achieved.

Description

technical field [0001] The invention belongs to the field of petroleum and natural gas engineering, and relates to indoor experimental evaluation of oil and gas field exploitation technology, in particular to a high-temperature and high-pressure foam liquid dynamic filtration evaluation system and an evaluation method thereof. Background technique [0002] The conventional liquid dynamic fluid loss evaluation method is to use the displacement pump to displace the liquid into the pipeline, flow and shear in the pipeline at a certain shear rate, and flow through the end face of the rock core in the liquid cavity, and then measure the filtration rate of the liquid. loss and time. The main reasons why this method is not suitable for dynamic fluid loss evaluation of foam liquids are as follows: ① Foam liquid needs to be mixed with a certain gas-liquid ratio and formed after strong stirring, while the conventional dynamic fluid loss evaluation method cannot be realized by using a ...

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Problems solved by technology

The main reasons why this method is not suitable for dynamic fluid loss evaluation of foam liquids are as follows: ① Foam liquid needs to be mixed with a certain gas-liquid ratio and formed after strong stirring, while the conventional dynamic fluid loss evaluation method cannot be realized by using a displacement pump Strong stirring; ② Gas-liquid separation measurement needs to be considered when measuring foam liquid filtration loss, and the conventional experimental method is not set, resulting in the inability to achieve gas-liquid separation

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