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Method for low temperature demulsification of thickened oil

A heavy oil, low temperature technology, applied in the field of low temperature demulsification of heavy oil, can solve the problems of high energy consumption, complex process, large fluctuation of dehydration effect, etc.

Inactive Publication Date: 2015-03-25
BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the current problems of complex oil demulsification process, high energy consumption and large fluctuations in dehydration effect, the present invention proposes a new one-stage dehydration method with simple production, greatly reduced energy consumption and good dehydration effect

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  • Method for low temperature demulsification of thickened oil
  • Method for low temperature demulsification of thickened oil
  • Method for low temperature demulsification of thickened oil

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: the selection of heavy oil

[0019] Composition and property analysis of typical heavy oil (take the heavy oil first station oil sample of Binnan Oil Production Plant as an example). Refer to "SH / T 0509-92 Petroleum Asphalt Component Determination Method" to analyze the crude oil group components, the results are shown in the following table.

[0020] Table 1 Contents of crude oil group components

[0021] component name asphaltenes colloid Aroma Saturation quality score 3.96% 19.59% 34.65% 39.96% sum 98.16%

[0022] Note: The content of impurities (clay particles in crude oil samples) in the above table is 1.84%

[0023] The viscosity of typical oil samples is measured by AR-G2 rheometer, and the relationship between viscosity and temperature of oil samples is obtained. Provide key basic data support for the quantitative description of demulsification by heating at elevated temperature and demulsification b...

Embodiment 2

[0030] Embodiment 2: the selection of demulsifier

[0031] The demulsification performance of several demulsifiers was compared using the Petroleum and Natural Gas Industry Standard of the People's Republic of China, "Crude Oil Demulsifier Performance Test Method (Bottle Test Method)" (SY / T5281-2000). Three kinds of demulsifiers were selected in the experiment, namely industrial 301 oil-soluble demulsifier, industrial 401 water-soluble demulsifier and laboratory-made polyether crude oil demulsifier. The experimental results are attached image 3 ,Depend on image 3 It can be seen that for the same oil sample (oil sample from the first heavy oil station of Binnan Oil Production Plant), and other experimental conditions are the same, the dehydration rate of the laboratory-made polyether-based crude oil demulsifier is faster, while the effect of the two industrial demulsifiers is different. Not much, water-soluble demulsifiers are slightly better. The following experiments use...

Embodiment 3

[0032] Embodiment 3: laboratory simulation demulsification process

[0033] The actual crude oil demulsification process of industrial production is simulated in the laboratory. The experimental sample is the degassed crude oil from the high-efficiency water separator at the first station of Binnan Oil Production Plant. The water content is 48%. The water content in crude oil is in accordance with GB / T 8929-88 (distillation method) for measurement (the following water content measurement method is the same). Measure 350mL crude oil sample into a 500mL beaker (diameter 8cm, height 13.8cm), put the beaker in a constant temperature water bath (60°C), and stir with a stirrer (stirring speed is 200 rpm), after the temperature is constant Add demulsifier, the amount of demulsifier is 120ppm, continue to stir for 5 minutes to fully mix the demulsifier, then stop stirring, take out the stirring paddle, seal the beaker with plastic wrap, and adjust the temperature of the constant tempe...

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Abstract

The invention relates to a method for low temperature demulsification of thickened oil. According to the method, a demulsifier is introduced, a demulsifying agent is effectively diffused in crude oil emulsion, and the aim of dehydrating the thickened oil at a low temperature is achieved by adopting a method for performing primary heating, performing primary demulsifying agent addition and performing primary sedimentation. The method disclosed by the invention is good in demulsification effect and is particularly suitable for demulsification of thickened oil at a low temperature. The method is simple in process, small in equipment number, easy and convenient to operate and high in demulsifying agent adaptability, and water in the thickened oil can be efficiently and rapidly removed at the low temperature, so that the aim of greatly reducing the energy consumption is achieved.

Description

technical field [0001] The invention relates to a low-temperature demulsification method for heavy oil. Background technique [0002] my country has abundant heavy oil resources, and the annual output of heavy oil has reached more than 10 million tons, which has made an important contribution to alleviating the tight oil supply and demand in my country. However, since most oil fields have entered the middle and late stage of production, the water content of the produced fluid is very high, and the heavy oil contains high natural interface active substances such as colloid and asphaltene, resulting in high viscosity and poor fluidity of the crude oil emulsion. The strength of the oil-water interface film increases, the water droplets are difficult to coalesce, and the demulsification and dehydration are difficult. At present, thermochemical or electrochemical demulsification dehydration technology is commonly used in domestic oilfields. The existing technology has problems s...

Claims

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Application Information

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IPC IPC(8): C10G33/04C10G33/06
CPCC10G33/04C10G33/06C10G2300/4006
Inventor 慕朝赵如松佟啦嘎邹小勇房晓殷延海
Owner BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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