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Preparation method of crude oil emulsion based on quantitative characterization of apparent viscosity

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

Inactive Publication Date: 2017-05-03
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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  • Preparation method of crude oil emulsion based on quantitative characterization of apparent viscosity
  • Preparation method of crude oil emulsion based on quantitative characterization of apparent viscosity
  • Preparation method of crude oil emulsion based on quantitative characterization of apparent viscosity

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Embodiment Construction

[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 present invention relates to a crude oil emulsion preparation method based on the quantitative characterization of apparent viscosity, specifically: first obtain the cumulative wax precipitation amount of crude oil at each temperature below the wax precipitation temperature; determine the density of the crude oil emulsion preparation temperature; Crude oil samples are divided into several sealed grinding bottles for pretreatment; determination of the freezing point of crude oil and equilibrium apparent viscosity; preparation of crude oil emulsion for obtaining quantitative characterization parameters of apparent viscosity; determination of the viscosity of the prepared crude oil emulsion Apparent viscosity, calculate the viscous flow entropy output value under each preparation condition; under the premise of knowing the blank crude oil density, apparent viscosity, wax precipitation characteristics and other physical properties, accurately select the stirring conditions when preparing the emulsion. The invention establishes a preparation method of the simulated crude oil emulsion, prepares the simulated oil-water emulsion with the same rheological properties under actual production conditions, and provides a basis for experimental research on the rheological properties of the 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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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/22C10G1/00
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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