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Pressure drop prediction method for horizontal oil-water two-phase flow based on dynamic contact angle

A technology of dynamic contact angle and prediction method, applied in surface tension analysis and other directions, can solve problems such as differences and achieve the effect of pressure drop

Inactive Publication Date: 2019-06-04
TIANJIN UNIV
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Problems solved by technology

It should be pointed out that the contact angle in the process of oil-water two-phase flow is very different from the contact angle measured in the static state

Method used

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  • Pressure drop prediction method for horizontal oil-water two-phase flow based on dynamic contact angle
  • Pressure drop prediction method for horizontal oil-water two-phase flow based on dynamic contact angle
  • Pressure drop prediction method for horizontal oil-water two-phase flow based on dynamic contact angle

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Embodiment Construction

[0062] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments. The present invention includes:

[0063] (1) The present invention has carried out the static measurement experiment of the oil-water contact angle. use figure 1 The method shown can measure the contact angle between the oil-water two-phase and the wall in the static state. However, in the actual flow process, the oil-water interface will fluctuate up and down, and the direction of the fluctuation is as follows: figure 2 indicated by the middle arrow. During the fluctuation process, the oil-water two phases replace each other, so the contact angle changes. Therefore, the present invention introduces the theory of dynamic contact angle into the modeling process of water flow.

[0064] (2) The present invention uses a parallel line array sensor to perform dynamic experimental measurement and reconstruction of the layered interface morphology of the ...

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Abstract

The invention relates to a pressure drop prediction method for a horizontal oil-water two-phase flow based on a dynamic contact angle, which comprises the steps of respectively inputting the density [Rho]o and [Rho]w of the oil phase and the water phase, the motion viscosity [Nu]o and [Nu]w of the oil phase and the water phase, the interfacial tension [Gamma]ow and the pipeline inner diameter D; inputting apparent velocity parameters of the oil phase and the water phase; equally dividing the pipeline inner diameter D into N parts; calculating the pressure drop of the oil phase and the water phase; and obtaining pressure drop parameters.

Description

technical field [0001] The invention relates to a method for predicting pressure drop of horizontal oil-water two-phase flow based on dynamic contact angle. Background technique [0002] At present, there are a series of problems in my country's oil fields, such as high water cut, low permeability, and high viscosity heavy oil. As an effective enhanced oil recovery technology, horizontal well technology is widely used in the process of oil extraction. The oil-water two-phase fluid is easy to generate stratified flow under the action of gravity during the horizontal wellbore transportation, and the pressure drop parameter during the oil-water flow process is an important indicator for the productivity evaluation of the oil well production process. Therefore, it is of great significance to realize accurate prediction of pressure drop in stratified flow of horizontal oil-water two-phase flow. [0003] The pressure drop prediction of horizontal oil-water two-phase flow is usua...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N13/02
Inventor 翟路生张宏鑫鄢聪金宁德
Owner TIANJIN UNIV
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