A Differential Pressure Measurement Method for Water Holdup of Oil-Water Two-Phase Flowing Oil-in-Water Emulsion
A technology of oil-in-water emulsion and water holdup, which is applied in the direction of pressure difference measurement between multiple valves, measuring devices, and measuring fluid pressure, etc., which can solve the problems of low response sensitivity, difficult oil phase and water phase, and sensitive Problems such as inhomogeneous field spatial distribution, electric field edge effect, etc., achieve the effect of high measurement resolution
Active Publication Date: 2020-08-18
TIANJIN UNIV
View PDF7 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, under the action of surfactant molecules, the oil phase in the oil-water emulsion is more fully emulsified, and it is difficult to completely separate the oil phase from the water phase. The traditional quick-closing valve method cannot meet the accurate measurement of water holdup parameters.
[0006] Usually, the diameter of oil bubbles in oil-in-water emulsions is mostly micron-scale, and the ring electrode conductivity sensor is limited by the inhomogeneity of the sensitive field space distribution and the edge effect of the electric field, and the response sensitivity to the distribution change of the dispersed phase of the oil-water emulsion is low. Water holdup has low resolution
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0024] In order to realize the differential pressure measurement method of the water holdup rate of the oil-in-water emulsion under the action of the surfactant, the invention proposes a combined measurement method of the field focusing arc-shaped wall-to-wall conductivity sensor and the differential pressure sensor. Among them, the field-focused arc-shaped wall-to-wall conductance sensor constructs the excitation electrode and the central measurement electrode in radial positions on the inner wall of the small-diameter measurement channel. Edge protection electrodes of the same size are respectively placed at positions equal to both sides of the central measuring electrode. The same load is applied to the central measuring electrode and the edge protection electrode. According to the principle of electrical sensitivity, this method can significantly enhance the electric field intensity at the central electrode, improve the sensitivity of water holdup measurement, and effective...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a differential pressure measurement method of the water holdup in oil-water two-phase flow oil-in-water emulsion. The method is characterized in that a measuring way of combining a field-focused arc-to-wall conductivity sensor with a differential pressure sensor is adopted, and the field-focused arc-to-wall conductivity sensor is used for measuring water holdup information of mixed fluid; the differential pressure sensor is used for measuring pressure drop information of the mixed fluid. Voltage signals of the field-focused arc-to-wall conductivity sensor under different flow conditions are normalized, water holdup measurement characteristics of the field-focused arc-to-wall conductivity sensor are analyzed, and water holdup parameters are extracted; the frictional resistance coefficient of the oil-in-water emulsion under different flow conditions can be obtained in combination with the measured water holdup and the pressure drop, measured by differential pressure sensor, of the oil-in-water emulsion; finally, the water holdup parameters of the oil-in-water emulsion are predicted in combination with a fitted relation between the frictional resistance coefficient and the Reynolds number of the mixed fluid and the pressure drop, measured by differential pressure sensor, of the mixed fluid.
Description
technical field [0001] The invention relates to a method for measuring water holdup of oil-water two-phase flowing oil-in-water emulsion in an oil well under the action of a surfactant in the field of oilfield dynamic monitoring. Background technique [0002] The exploitation of onshore low-yield and low-permeability oilfields in my country has entered the mid-to-late stage of exploitation characterized by low yield and high water cut. In order to enhance oil recovery, injecting surfactant into oil layer has been widely used in tertiary oil recovery technology. Among them, accurate measurement of water holdup parameters of oil-water two-phase flow oil-in-water emulsion in oil well under the action of surfactant can provide a scientific basis for the adjustment of tertiary oil recovery development plan and the optimization of reservoir production characteristics. [0003] Injecting a surfactant aqueous solution into the formation will greatly reduce the interfacial tension b...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): E21B49/08G01N27/06G01L13/00
CPCE21B49/08G01L13/00G01N27/06
Inventor 金宁德韩云峰翟路生任英玉何元生
Owner TIANJIN UNIV