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Method for detecting leakage point of casing using storage type ultrasonic flowmeter

An ultrasonic and storage technology, applied in the direction of measuring the acceleration and deceleration rate of the fluid, using liquid/vacuum for liquid tightness measurement, etc., can solve the problems of inaccurate detection of casing leakage points, long construction time, and high construction costs. , to achieve the effect of increasing oil production and water injection, improving utilization rate and high accuracy

Inactive Publication Date: 2007-12-19
SINOPEC SHENGLI OILFIELD
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Problems solved by technology

[0009] The purpose of the present invention is to provide a method for detecting the leakage point of the casing by using a storage type ultrasonic flowmeter, so as to solve the problems of inaccurate detection of the leakage point of the casing, high construction cost and long construction time in the above-mentioned methods for detecting the leakage point of the casing. question

Method used

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Embodiment Construction

[0014] For further disclosing the technical scheme of the present invention, below in conjunction with embodiment is described in detail:

[0015] The ultrasonic flowmeter consists of two probes. When working, the two probes emit ultrasonic waves at the same time, and each receives the sound waves of the other party after emission. The phase difference of the received waves is related to the fluid velocity between the probes, and has nothing to do with the nature of the fluid. Launch at the same time, repeat this way, after measuring the flow velocity, convert the flow according to the size of the pipe diameter. Therefore, the characteristic of this instrument is that it can accurately measure the cross-sectional flow of the pipe diameter, and it is not affected by the nature of the liquid. When testing liquid flow, it can test pressure and temperature at the same time. The instrument is powered by batteries, the steel wire is carried down the well, the test data is stored in...

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Abstract

It is a method to detect the leakage spot of cannula by use of storage ultrasonic flowmeter, which comprises test mobile, storage ultrasonic flowmeter and its measurement method. It is characterized by the following: to connect the ultrasonic flowmeter on the steel wire of the roller of the test mobile and to lower it into the upper position of discharge hole of oil well; to fill water into the well by stable flow; then to lift the flowmeter with certain time lag and stay time till to the well top. The ultrasonic flowmeter is connected with computer and plays back the test data and determines the leakage spots according to flow changes.

Description

1. Technical field [0001] The invention relates to a method for detecting the leakage point of a casing by using a storage type ultrasonic flowmeter. 2. Background technology [0002] At present, the mechanical methods for finding casing leaks in various domestic oilfields mostly use packer inspection, and the logging methods mostly use temperature, borehole diameter, visible light TV, acoustic TV and other methods. [0003] The packer test uses the packer as the sealing point to test the pressure of the casing section by section. The construction time is long and the process is complicated, and because the sealing condition of the packer cannot be known, it is sometimes impossible to determine whether the casing is leaking or not. The packer is not sealed. [0004] The well temperature method is proposed based on the abnormal temperature of the outlet (leakage) point, but with the widespread use of water injection development, the original ground temperature distribution i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M3/28
Inventor 陈志敏孙兆寅张美玲仇涛陈士军
Owner SINOPEC SHENGLI OILFIELD