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Horizontal well oil-water two-phase flow measuring method based on thermal method

A measurement method and technology for horizontal wells, which are applied in the application of thermal effects to detect fluid flow and other directions, and can solve problems such as inaccurate average flow measurement

Active Publication Date: 2021-02-12
正弦科技有限公司
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Problems solved by technology

[0004] In order to solve the problem of the influence of sand production in oil wells on the flow measurement of oil-water two-phase flow and the inaccurate measurement of the average flow rate, the present invention proposes a method for measuring the flow rate of oil-water two-phase flow in horizontal wells based on the thermal method. The flow rate of the fluid is indirectly obtained by calculating the transit time of the pulse-heated fluid passing through the fixed-distance temperature detector array

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  • Horizontal well oil-water two-phase flow measuring method based on thermal method
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  • Horizontal well oil-water two-phase flow measuring method based on thermal method

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Embodiment 1

[0057] Referring to each figure, a method for measuring the flow rate of oil-water two-phase flow in a horizontal well based on a thermal method, the measuring method comprises the following steps:

[0058] Step 1: Install a pair of capacitive sensors upstream of the horizontal oil-water pipeline to measure the water content of the two-phase flow, and judge whether the oil-water two-phase flow reaches a stable state through the water content;

[0059] The oil-water two-phase flow fluid in a horizontal wellbore flows in layers in a fixed flow channel. When a polarized electric field parallel to its surface is applied to the two-phase flow medium, the medium of the water phase and the oil phase is a polarized field relative to the polarized field. According to the parallel connection principle, the formula for calculating the equivalent permittivity of the two-phase flow mixture can be expressed as:

[0060] ε=β t ε w +(1-β t )ε o

[0061] Among them, ε represents the diele...

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Abstract

The invention belongs to the technical field of petroleum engineering, and particularly relates to a horizontal well oil-water two-phase flow measuring method based on a thermal method. The method comprises the following steps: 1, installing a pair of capacitance sensors at the upstream of a horizontal oil-water pipeline to measure the water content of two-phase flow, and judging that fluid reaches a stable state through the water content; 2, after the flow pattern reaches a stable state, controlling a pulse type internal heat source in the horizontal pipeline to heat the oil-water two-phase flow fluid to generate a thermal pulse with short duration and high peak value; 3, fixing a temperature detector at an oil-water two-phase flow inlet, and measuring the initial temperature of the fluid, arranging two temperature detector arrays in a downstream pipeline of a heat source; collecting a temperature signal of the fluid in the pipeline; and 4, establishing an average flow velocity calculation model of the horizontal oil-water two-phase flow, and calculating the flow of the horizontal oil-water two-phase flow. The problems of influence on oil-water two-phase flow measurement and inaccurate average flow measurement caused by the problems of oil well sand production and the like are solved, and the flow of the oil-water two-phase flow of the horizontal well is measured more accurately.

Description

Technical field: [0001] The invention belongs to the technical field of petroleum engineering, in particular to a method for measuring the flow rate of oil-water two-phase flow in a horizontal well based on a thermal method. Background technique: [0002] The flow rate of oil-water two-phase flow is an important parameter in the current oilfield development process. Timely and accurate grasp of oil well flow is of great significance for grasping downhole conditions, formulating production plans and improving oil well quality. At present, the commonly used flow measurement methods, such as turbine flowmeter and ultrasonic flowmeter, will cause great measurement error due to the influence of fluid adhesion when encountering high-viscosity fluids, and even cannot be measured. Based on the thermal method to measure the flow rate of oil-water two-phase flow in horizontal wells, it does not require movable parts, and is less affected by fluid adhesion, and can also work for a lon...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/68
CPCG01F1/68
Inventor 韩连福李静茹付长凤黄乃兴刘兴斌刘超
Owner 正弦科技有限公司
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