Conductance tracking correlation method for downflow well flow measurement

A technology for flow measurement and injection wells, which is applied in the directions of measurement, earthwork drilling and production, wellbore/well components, etc., and achieves the effect of wide application fields and low start-up displacement

Inactive Publication Date: 2008-08-06
DAQING OILFIELD CO LTD
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  • Application Information

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Problems solved by technology

[0003] In order to solve the problem that the existing measurement methods in the field of injection well flow measurement have some application limitations, the present invention provides a conductance trace correlation method applied to injection well flow measur...

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  • Conductance tracking correlation method for downflow well flow measurement
  • Conductance tracking correlation method for downflow well flow measurement
  • Conductance tracking correlation method for downflow well flow measurement

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with accompanying drawing:

[0033] The conductance trace correlation method applied to flow measurement of injection wells described in the present invention is mainly realized by cross-correlation flow measurement technology, and the method is composed of the following steps:

[0034] Firstly, after connecting the marker solution releaser and the conductivity-type correlation flow sensor in sequence, it is set in the fluid flow channel of the injection well. The conductivity-type correlation flow sensor has six electrodes A, B, C, D, E, F, Among them, the two electrodes at the beginning and the end are excitation electrodes, externally connected to a constant current source circuit, and the four electrodes in the middle are signal acquisition electrodes, one pair of which constitutes an upstream sensor pair, and the other pair constitutes a downstream sensor pair, which are connected to two signal pro...

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Abstract

The invention relates to a conductance-tracer relative method which is applied in injecting well flow quantity measurement, which mainly solves the problems that in the injecting well flow quantity measurement field, the existing measuring methods have some limitation on application. The method is characterized in that the method comprises the following steps: manually measuring through adding external destabilization in single-phase flow which is injected in a well, utilizing a marked solution releaser to release marked solution with high electric conductivity in liquid, the marked solution moves with liquid to flow to an up stream and a down stream sensor pair, diffused non-uniformity can form detectable hydrodynamic noise in the process of moving with liquid, hydrodynamic noise signal of a sensor can have excellent similarity as time variety tendency in sensitive areas of two sensor pairs, thereby achieving the purpose of utilizing conductance type relative flow quantity sensor to measure the flow quantity of injecting water. The conductance-tracer relative method has the advantages of low production cost, low starting output volume, excellent repeatability and uniformity, which has no movable members and blocking element, and has no radioactive pollution.

Description

Technical field: [0001] The invention relates to a flow measurement method in the field of oil field logging, in particular to a method for realizing flow measurement in injection wells by using cross-correlation flow measurement technology. Background technique: [0002] Currently used in injection well flow measurement mainly include isotope tracer method, isotope tracer correlation method, turbine flowmeter, electromagnetic flowmeter, ultrasonic flowmeter, pulse neutron oxygen activation instrument, etc. These methods and instruments have been widely used in the injection profile measurement of general injection wells and layered injection wells, and are suitable for media such as water and polymer solutions. However, there is radioactive pollution in the isotope tracer method and isotope tracer correlation method; the movable parts and flow blocking elements of the turbine flowmeter are easily stuck by quicksand or dirt in the well; electromagnetic flowmeter, ultrasonic ...

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Application Information

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IPC IPC(8): E21B47/00
Inventor 刘兴斌胡金海马水龙蔡兵王敏李军
Owner DAQING OILFIELD CO LTD
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