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Method for detecting sleeve fluid-loss point utilizing direct-reading ultrasound flowmete

An ultrasonic and flowmeter technology, used in liquid/fluid solid measurement, flow/mass flow measurement, and fluid acceleration/deceleration rate measurement, etc., can solve the problems of complex process, high cost, and low success rate of casing leakage

Inactive Publication Date: 2008-01-02
SINOPEC SHENGLI OILFIELD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for detecting the leakage point of the casing by using a direct-reading ultrasonic flowmeter, which solves the complex process, low degree of intelligence, low accuracy, high cost, and the leakage of the casing in the above-mentioned prior art. low success rate

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  • Method for detecting sleeve fluid-loss point utilizing direct-reading ultrasound flowmete
  • Method for detecting sleeve fluid-loss point utilizing direct-reading ultrasound flowmete
  • Method for detecting sleeve fluid-loss point utilizing direct-reading ultrasound flowmete

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Embodiment Construction

[0024] In order to further disclose the technical solution of the present invention, the following will be described in detail through examples in conjunction with the accompanying drawings:

[0025] The invention includes a logging vehicle, a computer, a direct-reading ultrasonic flowmeter 3 and a detection method for a casing leak point, and is characterized in that the interface of the direct-reading ultrasonic flow is connected to the cable 1 on the logging vehicle through a cable joint 2 , the other end of the cable is connected with the computer interface on the logging vehicle through a slip ring, and the direct-reading ultrasonic flowmeter 3 is lowered to the upper part of the perforation section of the oil-water well formation by the logging vehicle, and the flowmeter is connected by the triangular centralizer 10 Support the center of the casing 8, inject water into the well with a steady flow rate of 50 cubic meters per hour, and then lift up the direct-reading ultras...

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Abstract

The detection system includes well logging truck, computer, and directly read ultrasonic flow meter. The casing leakage loss location detecting process includes connecting the directly read ultrasonic flow meter to the computer via cable joint, cable of the well logging truck and collector ring; setting the directly read ultrasonic flow meter with the cable of the well logging truck to the upper part of the perforating section inside oil-water well stratum; raising the directly read ultrasonic flow meter gradually to test the flow rate values in different depth; determining the leakage loss section of the casing based on the displayed changing flow rate data; lowering the ultrasonic flow meter to the leakage loss section of the casing and raising slowly for continuous measurement to find out the leakage loss point based on the change in flow rate.

Description

1. Technical field [0001] The invention relates to a method for detecting the leakage point of a casing by using a direct-reading ultrasonic flowmeter. 2. Background technology [0002] In the process of petroleum development, due to various reasons such as the anisotropy of underground stress and the corrosion of fluid in the well, casing deformation and casing damage will be caused, which will bring huge losses to oilfield production. Taking Chunliang Oil Production Plant as an example, there are currently 173 casing damaged wells in Chunliang Oil Production Plant, including 82 oil wells and 91 water wells, accounting for one-eighth of the total oil and water wells in the whole plant. Affect crude oil 310t / d, affect water injection 6800m 3 / d, the detection of the downhole condition of oil casing is an urgent problem to be solved. [0003] The currently used methods for detecting casing leakage points, such as well temperature method, mechanical borehole caliper method, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/10G01M3/28G01F1/66E21B47/00
Inventor 陈士军韩强陈志敏孙兆寅袁其祥
Owner SINOPEC SHENGLI OILFIELD
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