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Stability determination method and device and application in demulsification and stability evaluation

A measuring method and technology for measuring devices, which can be applied to measuring devices, material analysis by electromagnetic means, instruments, etc., and can solve problems such as large limitations, complicated operations, and poor repeatability.

Active Publication Date: 2013-03-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These methods are time consuming and less reproducible
In recent years, the method of using the critical electric field strength to evaluate the stability of oil-water emulsions has begun to be applied abroad. In addition, there are electric field polarization testers, which can judge the degree of difficulty of crude oil dehydration through static electric dehydration current curves, and can be prepared by measuring The film capacitance and film resistance of the interfacial film are used to evaluate the influence of surfactants on the demulsification effect of oil-water emulsions, etc., but these methods are still in the research stage, and the operation is complicated and has great limitations.

Method used

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  • Stability determination method and device and application in demulsification and stability evaluation
  • Stability determination method and device and application in demulsification and stability evaluation
  • Stability determination method and device and application in demulsification and stability evaluation

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Embodiment 1

[0060] In this embodiment, the viscosity is 71.6mm 2 / s (50 ℃) No. 1 crude oil and viscosity is 18.5mm 2 / s (50°C) No. 2 crude oil as an example to illustrate the stability determination method of the oil-water emulsion provided by the present invention and the application of the stability determination method in the evaluation of crude oil demulsification performance.

[0061] In this example, first take 100 mL of two crude oil samples, add 10 mL of distilled water to each, and emulsify for 60 seconds at a speed of 3000 r / min using a shear emulsifier to obtain No. 1 crude oil emulsion and No. 2 crude oil emulsion with a water content of 10%. liquid. No. 1 crude oil emulsion and No. 2 crude oil emulsion are placed in the same container, and to described No. 1 crude oil emulsion and No. 2 crude oil emulsion, apply the electric field that intensity is 350V / cm respectively, measure two continuously respectively simultaneously The current value in the electric field, stop applyi...

Embodiment 2

[0066] In this embodiment, taking Shengli crude oil transported by Luning Pipeline and three different types of commercial demulsifier SP169 demulsifier, AE9901 demulsifier and F3111 demulsifier as examples, it is used to illustrate the determination of the stability of the oil-water emulsion provided by the present invention Application of the method in the evaluation of demulsification effect of demulsifiers.

[0067] This embodiment is 0.9145kg / m to 460mL density 3 Add 40mL of water to the Shengli crude oil (20°C), then put it into a 1L stirring cup, and shear and emulsify it for 30s at a rotating speed of 3000r / min to obtain a crude oil emulsion with a water content of 8%; The Shengli crude oil emulsion is divided into 4 parts on average, and 50ppm of SP169 type demulsifier, AE9901 type demulsifier, F3111 type demulsifier are added to 3 parts and shaken well, and the fourth part is not added with demulsifier, thus obtaining 4 different emulsions Liquid sample; The 4 emuls...

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Abstract

The invention discloses a stability determination method of an oil-water emulsion, and the determination method comprises the following steps: preparing the oil-water emulsion; applying an electric field to the oil-water emulsion; measuring a response time period tA from the application of the electric field to the generation of current in the electric field, and / or measuring a peak tail current value IE when the current in the electric field converges into a constant value after a current peak value Imax; and using the response time period tA and / or the peak tail current value IE as the stability determination results of the oil-water emulsion. The invention also discloses an application of the stability determination method of the oil-water emulsion provided in the invention in demulsification effect evaluation of a demulsifier, an application of the stability determination method of the oil-water emulsion provided in the invention in crude oil demulsification performance evaluation, and a stability determination device (100) of the oil-water emulsion.

Description

technical field [0001] The present invention relates to a stability measurement method and a stability measurement device of a water-in-oil type or composite oil-water emulsion, the application of the stability measurement method in the evaluation of the demulsification effect of a demulsifier, and the stability measurement Application of the method in the evaluation of crude oil demulsification performance. Background technique [0002] Oil-water emulsions occur in many industrial operating stages. For example, in the process of crude oil extraction, due to the use of various chemical oil displacement agents, the composition of the produced fluid becomes more and more complex. What is extracted from the oil layer is not only the crude oil in the formation, but also more complex oil. Oil-water emulsion. During the transportation of produced fluid, the oil-water emulsion will increase the load on oil pipelines and equipment and cause corrosion. Therefore, before transportat...

Claims

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Application Information

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IPC IPC(8): G01N27/00G01N27/60
Inventor 谭丽于丽王振宇沈明欢杜鹤楚喜丽李本高
Owner CHINA PETROLEUM & CHEM CORP
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