Equipment and method for measuring temperature of wax precipitation point of crude oil

Abstract

The invention provides equipment and a method for measuring the temperature of a wax precipitation point of crude oil. The equipment comprises a high-pressure container for bearing crude oil to be measured, a heat preservation device, a first ultrasonic probe for transmitting ultrasonic waves, a second ultrasonic probe for receiving ultrasonic waves, an ultrasonic transmitter-receiver and a temperature sensor for monitoring the temperature in the high-pressure container in real time. The first ultrasonic probe and the second ultrasonic probe are arranged in the high-pressure container, and the tail part of the first ultrasonic probe and the tail part of the second ultrasonic probe penetrate out of the outer wall of the high-pressure container; the tail part of the first ultrasonic probe and the tail part of the second ultrasonic probe are connected with the ultrasonic transmitter-receiver. According to the equipment and the method provided by the invention, an acoustic parameter variation curve diagram in a crude oil cooling process is obtained by using an ultrasonic technology so as to obtain the temperature of the wax precipitation point of the crude oil to be measured according to the acoustic parameter variation curve diagram, and thus the temperature of the wax precipitation point of gas-containing crude oil of a high-temperature and high-pressure stratum is accurately measured.

Description

technical field [0001] The invention relates to oil reservoir development technology, in particular to a device and a method for measuring the wax precipitation point temperature of crude oil. Background technique [0002] Some crude oils, such as high pour point oil, have a large wax content, so the flow characteristics of this type of crude oil are very sensitive to temperature. During the production, development and transportation of this type of crude oil, as the ambient temperature decreases, heavy hydrocarbons such as paraffin gradually precipitate and deposit on the wellbore and pipe wall, resulting in a reduction in the effective flow area of ​​the production well tubing and ultimately a decline in oil well productivity , or even completely blocked, resulting in production stagnation. During surface pipeline transportation, the precipitation and deposition of heavy hydrocarbon substances such as paraffin will make the flow of such crude oil difficult, increase frict...

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Problems solved by technology

[0005] The invention provides a device and method for measuring the waxing point temperature of crude oil, which is used to solve the problem in the prior art that the waxing point temperature of gas-bearing crude oil in high-temperature and high-pressure formations cannot be accurately measured

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