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A Prediction Method for Thixotropic Properties of W/O Waxy Crude Oil Emulsion

A technology of thixotropic characteristics and prediction methods, applied in the direction of flow characteristics, non-Newtonian fluid flow characteristics, measuring devices, etc., can solve unrealistic problems and achieve the effect of enriching research progress

Active Publication Date: 2022-05-13
NORTHEAST GASOLINEEUM UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to provide a kind of prediction method of W / O type waxy crude oil emulsion thixotropic characteristic, the prediction method of this kind W / O type waxy crude oil emulsion thixotropic characteristic is used to solve only by experimental measurement to arbitrary It is unrealistic to quantitatively describe the thixotropy of waxy crude oil emulsion with water content

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  • A Prediction Method for Thixotropic Properties of W/O Waxy Crude Oil Emulsion
  • A Prediction Method for Thixotropic Properties of W/O Waxy Crude Oil Emulsion
  • A Prediction Method for Thixotropic Properties of W/O Waxy Crude Oil Emulsion

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Embodiment 1

[0055] Under the condition of constant stress loading, the method for predicting the thixotropic properties of W / O waxy crude oil emulsion under the experimental conditions of 34°C comprises the following steps:

[0056] 1. Preparation of waxy crude oil experimental samples, that is, pretreatment, the specific operations are as follows:

[0057] After the crude oil sample taken from the production site is placed in a sealed oil barrel and transported to the laboratory, the crude oil is fully stirred, and then packed into an appropriate ground bottle and sealed and stored as an experimental oil sample with the same composition; Put it in a water bath, let it stand still and heat it to 80°C, and keep it at a constant temperature for 2 hours, then take out the test oil sample and let it stand at room temperature, cool it naturally, store it in a place where the ambient temperature changes less for more than 48 hours, and use it as the base oil sample prepared by emulsion .

[00...

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Abstract

The invention relates to a method for predicting the thixotropic properties of a W / O type waxy crude oil emulsion, comprising: shearing a base oil sample and a W / O type waxy crude oil emulsion under constant shear stress loading conditions; The shear rate of the emulsion system under the action of constant shear stress is divided into the contribution of dehydrated crude oil and dispersed phase droplets; the relative shear rate of the emulsion is defined as the shear rate of the base oil sample under the same conditions and W / O The ratio of the shear rate of the waxy crude oil emulsion; establish the relationship between the equilibrium relative shear rate of the emulsion and the water content and shear stress; obtain the prediction model of the thixotropic characteristics of the W / O waxy crude oil emulsion ; Obtain the values ​​of the fitting parameters A, B, K, and D, and finally obtain the thixotropy data of the shear rate of the W / O waxy crude oil emulsion system changing with time under the condition of arbitrary water content and arbitrary loading stress. The invention solves the problem of mathematical description of the thixotropic properties of the W / O waxy crude oil emulsion.

Description

Technical field: [0001] The invention relates to crude oil-water pipeline mixed transportation technology, in particular to a method for predicting the thixotropic properties of W / O waxy crude oil emulsion. Background technique: [0002] With the decrease of onshore oil and gas resources, the global oil and gas development is fully developing into the deep sea. In offshore oilfield gathering and transportation pipelines, mixed transportation of oil, gas and water has become one of the main transportation methods. During the mixed transportation of oil and water, the two phases of oil and water form an emulsion due to turbulent flow and various shear effects. Because crude oil contains interface active substances, it is easier to form a W / O emulsion. The rheology of waxy crude oil is the final determinant of whether the oil pipeline can be safely restarted, and the thixotropy is an important basic data for the restart calculation of crude oil pipeline stoppage and the evaluat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N11/00G06F30/20G06F119/14G06F119/08
CPCG01N11/00G01N2011/0026G01N2011/004G06F30/20
Inventor 国丽萍韩雪冯涛刘扬成庆林时爽
Owner NORTHEAST GASOLINEEUM UNIV
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