Device and method for dehydrating crude oil

Abstract

The invention relates to a device and a method for dehydrating crude oil. The device mainly comprises a reaction kettle, a crude oil sample cavity, a stirrer, a piston and a pressure transferring liquid cavity; the reaction kettle is divided by the piston into the crude oil sample cavity and the pressure transferring liquid cavity; the stirrer is arranged in the crude oil sample cavity; a heating thermal insulation sleeve is arranged outside the reaction kettle; the reaction kettle is connected with a rotation and control system; and the pressure transferring liquid cavity is connected with a power system. According to the device, the crude oil to be treated is heated and pressurized by the reaction kettle; the reaction kettle rotates in the vertical direction to drive the stirrer to do reciprocating motion in the crude oil to be treated, so that the crude oil is subjected to mechanical demulsification and dehydrated; and the physical and chemical properties of the dehydrated crude oil cannot be influenced. A principle is reliable; the device and the method are convenient to operate; any chemical agent is not needed to be added; the phenomenon that the dehydrated crude oil hangs on a wall can be reduced; in-place oil compound composition experiment can be directly performed; the high temperature and high pressure physical characteristics of the crude oil can be kept; and the device and the method can be used for relative industry of performance test of the crude oil.

Description

technical field [0001] The invention relates to a crude oil dehydration device in the field of petroleum and natural gas development and a method for dehydrating crude oil using the device. Background technique [0002] The crude oil obtained from the wellhead or separator often contains water, and the water will affect the experimental data during the laboratory oil analysis or the experimental analysis of the high temperature and high pressure physical parameters of the crude oil fluid, so that the real data cannot be obtained. Therefore, it is necessary to dehydrate the obtained crude oil samples. [0003] There are two forms of water in crude oil: one is free water, which can generally be removed by heating and sedimentation; the other is emulsified water, which can only be dehydrated by selecting a suitable emulsifier according to the emulsification properties. [0004] Domestic and foreign laboratories generally use dehydration methods such as atmospheric pressure hea...

AI Technical Summary

Problems solved by technology

[0004] Domestic and foreign laboratories generally use dehydration methods such as atmospheric pressure heating dehydration, electric dehydration, and demulsifier addition to dehydrate crude oil before the experiment. Usually, the composition of crude oil components and high-temperature and high-pressure physical parameters after dehydration using these methods will change. Therefore, it is impossible to obtain the high temperature and high pressure physical property characteristic parameter data of the real crude oil fluid during the experimental analysis

Images