Method and device for rude oil on-line phase-changing water-containing detection

Abstract

Provided are a method and a device for crude oil on-line phase-changing water-containing detection. The method is characterized by comprising the following steps: firstly weighing and measuring crude oil detection samples; heating the samples to the boiling temperature of water through an electric heater and obtaining the mass of volatilized gasoline component; heating through the electric heater to keep the boiling temperature of the water constant, wherein the water begins to evaporate at the boiling temperature, the water in the crude oil is totally evaporated when the weighing sensor measures that the mass data are constant, and at this time the mass sum of the mass data measured by the weighing sensor and the mass of the gasoline component violating from the tested samples is the mass of the crude oil; and calculating the moisture content of the crude oil through the total mass of the tested samples and the mass of the crude oil. The method for crude oil on-line phase-changing water-containing detection thoroughly replaces a manual sampling distillation analyzing method, is high in measuring accuracy, saves time and energy, and can achieve real-time detection, the samples for crude oil detection cannot be wasted or discharged outside, the phenomenon of thickened oil hydrogen sulfide poisoning is avoided, and the effect of environment protection is achieved.

Description

technical field [0001] The invention relates to a method for detecting the water content of crude oil, in particular to an online phase change water content detection method for crude oil. Background technique [0002] Real-time monitoring of crude oil water content is an important task in oil well production, and its test error directly affects the dynamic analysis of oil wells and oil layers. The methods for determining the water content of crude oil mainly include artificial sampling distillation test method, microwave method, density method and capacitance method. Among them, although the manual sampling distillation test method has high measurement accuracy, it is labor-intensive and time-consuming, and cannot realize real-time detection. The difference in the absorption ability of water to microwave energy is measured by using a microwave reflection structure. Since the reflection coefficient of crude oil to microwave is related to the actual state of the oil-water mi...

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Problems solved by technology

However, the capacitance method is only suitable for measuring crude oil with a low water content, and the measurement process is usually interfered by factors such as temperature, which greatly affects the measurement accuracy of water content, and cannot accurately measure the water content of crude oil, which cannot meet the needs of oil wells and reservoirs. analysis needs

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