Miscible-phase pressure rapid measuring device

Abstract

The invention discloses a miscible-phase pressure rapid measuring device, and relates to the technical field of petroleum development testing, the miscible-phase pressure rapid measuring device comprises a high-temperature and high-pressure bubble rising system, a bubble tracking camera system and a sample injection system, the high-temperature and high-pressure bubble rising system comprises a high-pressure kettle, a water pump, an air pump and a sample tube, and the sample tube is detachably installed in the high-pressure kettle; an emptying port and an exhaust port are respectively formed in two sides of the upper end of the autoclave, a liquid outlet is formed in one side of the lower end of the autoclave, an air inlet and a liquid inlet are formed in the bottom of the autoclave, the upper end of the sample tube is connected with the exhaust port through a first channel, the lower end of the sample tube is connected with the air inlet through a second channel, and the lower part of the sample tube is communicated with the liquid inlet and the liquid outlet; and the bubble tracking camera system comprises a high-temperature and high-pressure observation window, a high-temperature and high-pressure resistant strip-shaped background light source and a high-speed camera, the sample injection system comprises an oil pump, and the oil pump is used for injecting sample oil into the sample tube. The device is convenient to observe, high in measurement accuracy and short in measurement period, and the test efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of petroleum development tests, in particular to a device for quickly measuring miscible pressure. Background technique [0002] Most of the existing devices for measuring the minimum miscible pressure are to fill sands of different diameters into the narrow tube model, use the injection system to inject crude oil into the thin tube model, measure the pressure value in the length direction of the thin tube model, and pass the change of pressure value situation to determine the minimum miscible pressure. This measurement method is greatly affected by human factors when filling the thin tube model. The density of each filling cannot be consistent, and the pressure value is also affected by the test accuracy of the pressure sensor transmitter, that is, the acquisition module. It takes a long time manually to calculate the minimum miscible pressure in the later stage, and the calculation is complicated and the ...

AI Technical Summary

Problems solved by technology

This measurement method is greatly affected by human factors when filling the thin tube model. The density of each filling cannot be consistent, and the pressure value is also affected by the test accuracy of the pressure sensor transmitter, that is, the acquisition module. It takes a long time manually to calculate the minimum miscible pressure in the later stage, and the calculation is complicated and the error rate is high

This kind of test device can no longer meet the economical, accurate and efficient experimental requirements in simulation experiments.

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