Method for quantitatively analyzing emulsification performance of petroleum crude oil emulsification system and method for determining emulsification performance
A technology of emulsification system and emulsification performance, which is applied in the direction of analyzing materials, color/spectral characteristic measurement, and measuring devices, etc., can solve the problems of emulsification performance analysis without emulsification system, and achieve good operability, practicability, good repeatability, and method simple effect
Active Publication Date: 2014-07-23
PETROCHINA CO LTD +1
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At present, there is no method to combine the oil-in-water and water-in-oil capacity to analyze the emulsification performance of the emulsification system, and there is no method that can quantitatively combine these two indicators to analyze the emulsification performance of the emulsification system
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[0033] The present invention will be described in further detail below in conjunction with specific examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0034] 1. Preparation of emulsion
[0035] 1.1 Treatment of petroleum crude oil—preparation of reference oil
[0036] Take 40mL of petroleum crude oil from the wellhead of the target block into a separatory funnel, add 160-200mL of gasoline (subject to the complete dissolution of the crude oil), and add 30mL of 1:1 hydrochloric acid (adjust the pH to about 2) for extraction. Fully shake and deflate, let stand for about 2 hours to separate layers (if there is no layering, add 5mL hydrochloric acid and shake a few times), collect the upper layer extract in a conical flask, add an appropriate amount of anhydrous sodium sulfate (add to no longer until agglomeration), the Erlenmeyer flask was stoppered and placed for mo...
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The invention discloses a method for quantitatively analyzing emulsification performance of a petroleum crude oil emulsification system and a method for determining the emulsification performance. The method for quantitatively analyzing the emulsification performance comprises the following steps: preparing an emulsion from reference oil and the emulsification system; respectively measuring the content of oil in the water phase of the emulsion and the content of water in the oil phase of the emulsion; then comprehensively analyzing emulsification performance indexes. According to the principle that absorbance and reference oil concentration shows a linear relationship within a certain range, the content of oil in the water phase is obtained correctly; the content of water in the oil phase is obtained by means of visually inspecting the volume change rate and then the correlative relationships between the emulsification performance index and the content of oil in the water phase and between the emulsification performance index and the content of water in the oil phase are obtained, so as to be used for analyzing the emulsification performance of the emulsification system; the oil-displacement efficiency amplification contributing degree is obtained by virtue of the emulsification performance index so as to determine the emulsification system. According to the method, the emulsification performance of the emulsification system is analyzed comprehensively in a quantitative way and guidance is quantitatively provided for the determination of the emulsification system; the processes are simple, the results are objective and scientific, and the repeatability is good.
Description
technical field [0001] The invention relates to an analysis method and a determination method for the emulsification performance of an emulsification system, in particular to a quantitative analysis method for the emulsification performance of a petroleum crude oil emulsification system and a determination method for the emulsification system. Background technique [0002] In the process of oil extraction, the crude oil and the emulsified system will form an emulsion of oil and water under the mixing action of underground porous rocks and the agitation of oil and natural gas; After strong collision and friction, the system can also form milky liquid. Therefore, the emulsification performance of the emulsification system is very important for the enhanced oil recovery of petroleum. [0003] At present, the emulsification system commonly used in oil extraction is a ternary compound emulsification system, which includes an aqueous solution of surfactant, alkali and polymer in ...
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Inventor 伍晓林郭春萍陆屹李笑薇耿杰侯兆伟李洁罗庆刘春天王海峰杨勇么世椿李星朱慧峰
Owner PETROCHINA CO LTD
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