High-temperature, high-pressure, and acid-resisting apparatus for foam generating and dynamic evaluating

Abstract

The invention relates to a high-temperature, high-pressure, and acid-resisting apparatus for foam generating and dynamic evaluating. According to the invention, a liquid tank A with a heating coat is communicating with a foam generator, a nitrogen supplying apparatus A is connected to the foam generator, and a liquid carbon dioxide supplying apparatus is connected to the foam generator. The foam generator is connected to a coil heating furnace, the coil heating furnace is provided with a viewing window, and a data collecting system composed of a microscope and a camera is connected outside ofthe viewing window. The coil heating furnace is connected to a flow temperature and density meter, a differential pressure sensor A, and a washing system. The liquid tank A with a heating coat is connected to a liquid tank B with a heating coat, and the connected liquid tanks are connected to a rock core holder with a heating apparatus. The rock core holder with a heating apparatus is connected to an ambient pressure system, a back pressure system, and the differential pressure sensor. The apparatus provided by the present invention is capable of simulating the temperature and the pressure under stratum conditions, testing the rheological characteristics and the viscosities of foam liquids, and testing the performances of the foam liquids, such as foam quality, particle diameter distribution, half life period and dynamic filtration, foam liquid damage, and acidifying effect.

Description

technical field [0001] The invention relates to an acid-resistant foam generating and high-temperature (177°C) high-pressure (70MPa) foam liquid dynamic performance evaluation device. Background technique [0002] In the exploration and development of oil and natural gas, low-pressure gas wells are common, and the application of foam liquid is gradually increasing, such as foam acidizing, foam fracturing, foam washing, foam sand washing, foam killing, etc. At present, the equipment for testing foam liquid performance at home and abroad is mainly: capillary viscometer, rotational viscometer, vibratory viscometer can test the rheology of foam liquid; There is no report on the equipment for testing foam particle size distribution, half-life, etc., dynamic fluid loss, foam liquid damage, acidification effect and other properties of foam liquid under high pressure, and there is no equipment for joint measurement of the above foam properties. [0003] There has been a long histor...

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Problems solved by technology

[0003] There has been a long history of research on foam fluids at home and abroad, but most of them only focus on the performance of foam fluids at normal temperature and pressure. There are not many research reports on foam performance under high temperature and high pressure conditions, and only the foam rheological properties are still controversial.

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