Crude oil emulsion preparation method based on apparent viscosity quantitative characterization

A technology of apparent viscosity and preparation method, which is applied in the preparation of test samples, etc., and can solve the problems that the actual emulsification degree cannot be quantified and does not match.

Inactive Publication Date: 2016-10-26
NORTHEAST GASOLINEEUM UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to provide a crude oil emulsion preparation method based on the quantitative characterization of the apparent viscosity. This crude oil emulsion preparation method based on the quantitative characterization of the apparent viscosity is used to solve the problem of the crude oil emulsion prepared in the existing laboratory and the actual emulsification degree of production. Non-quantifiable discrepancies

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  • Crude oil emulsion preparation method based on apparent viscosity quantitative characterization
  • Crude oil emulsion preparation method based on apparent viscosity quantitative characterization
  • Crude oil emulsion preparation method based on apparent viscosity quantitative characterization

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[0072] Below in conjunction with accompanying drawing, the present invention will be further described:

[0073] The preparation method of this crude oil emulsion based on quantitative characterization of apparent viscosity is as follows:

[0074] Step 1: After the crude oil samples taken from the production site are placed in oil drums and transported to the laboratory, according to the oil and gas industry standard SY / T 0545-2012 "Determination of thermal characteristic parameters of crude oil wax precipitation: differential scanning calorimetry" , using a modulated differential scanning calorimeter to measure the wax precipitation characteristics of crude oil, the specific method is: weigh 4-8 mg of crude oil sample from the oil barrel, put it into an aluminum crucible and seal it, and put the sealed crucible into a differential In the measurement cell of the type calorimetry scanner, heat it to 80°C and keep the temperature constant for 1min, then cool it from 80°C to -20°...

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Abstract

The invention relates to a crude oil emulsion preparation method based on apparent viscosity quantitative characterization. The preparation method comprises the following steps: at first, obtaining the crude oil accumulated precipitated wax amounts at different temperatures that are below the wax precipitation temperature; determining the density of crude oil emulsion preparation temperature; taking out a crude oil sample from an oil barrel, filling the crude oil sample into multiple sealed bottles with a ground stopper, carrying out a pretreatment; measuring the crude oil solidification point and balanced apparent viscosity; preparing crude oil emulsion that is used to obtain the quantitative characterization parameters of apparent viscosity; measuring the apparent viscosity of prepared crude oil emulsion, calculating the viscosity flowing entropy production value under each preparation condition; and accurately choosing stirring conditions for preparing emulsion according to known physical properties such as blank crude oil density, apparent viscosity, and wax precipitation characteristics, and the like. The preparation method is used to produce mimic crude oil emulsion, which has the rheological properties that is similar with crude oil under practical production conditions, and thus a foundation is provided for the research on rheological properties of crude oil emulsion.

Description

technical field [0001] The invention relates to the preparation technology of crude oil emulsion used in experimental research, in particular to the preparation method of crude oil emulsion based on quantitative characterization of apparent viscosity. Background technique [0002] With the development of oil development to the deep sea, oil, gas and water mixed transportation will become one of the main transportation methods for long-distance offshore oilfield gathering and transportation pipelines. In the process of oil-water mixed transportation, the oil-water mixture will undergo high-speed shearing at the wellhead, pumps, and throttle valves to form a crude oil emulsion. The rheology of crude oil emulsion is one of the main basic data for the design and management of oil-water mixed transportation pipelines, and it is also the final determinant of whether the crude oil-water mixed transportation pipeline can be restarted safely. Basic information. [0003] The measure...

Claims

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Application Information

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IPC IPC(8): G01N1/28
CPCG01N1/28
Inventor 国丽萍刘扬殷代印成庆林孙晓峰陈旭
Owner NORTHEAST GASOLINEEUM UNIV
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