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Oilfield down-hole current-collecting type highly aqueous water oil two-phase flow measurement method based on electromagnetic method

An electromagnetic flowmeter and electromagnetic method technology, which is applied in the application of electromagnetic flowmeters to detect fluid flow, volume/mass flow generated by electromagnetic effects, measurement, etc. Dirt stuck and other problems, to achieve the effect of high measurement success

Inactive Publication Date: 2009-01-07
DAQING OILFIELD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, because the turbine flowmeter has movable parts of the rotating blades, the rotating blades of the turbine flowmeter are easily stuck by the quicksand or dirt in the well during the measurement, resulting in measurement failure, measurement accuracy cannot be guaranteed, delays in work and delays, and affect production
Also, the meter constant of the turbine flowmeter changes as the turbine rotating blades wear
This problem has been perplexing technicians in the field of oilfield logging. At present, there is no better way to solve the problem of measuring oil-water two-phase flow in oil wells with sand production or solid impurities.

Method used

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  • Oilfield down-hole current-collecting type highly aqueous water oil two-phase flow measurement method based on electromagnetic method
  • Oilfield down-hole current-collecting type highly aqueous water oil two-phase flow measurement method based on electromagnetic method
  • Oilfield down-hole current-collecting type highly aqueous water oil two-phase flow measurement method based on electromagnetic method

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Embodiment approach

[0015] Below in conjunction with accompanying drawing or attached table, the present invention will be further described:

[0016] An electromagnetic method-based method for measuring the flow rate of oilfield downhole flow-collecting high-water-cut two-phase flow in oilfields used in the field of oilfield logging, comprising the following steps:

[0017] One is to install the current collector electromagnetic flowmeter 2 on the current collector 3 (see attached figure 1 As shown), a measuring instrument is formed, and the instrument is lowered into the casing 4, and then the instrument is lowered to the measuring point of the corresponding layer in the casing according to the production layer marked in the well logging notice of the oil production plant;

[0018] The second is to supply power to the current collector 3 motor through the ground device, so that the current collector 3 reaches a fully opened state. At this time, the annular space formed by the instrument and the...

Embodiment 1

[0023] Install the internal flow electromagnetic flowmeter 2 on the current collector 3 (see attached figure 1 shown), form a measuring instrument, lower the instrument into the casing 4, and then according to the logging notice of the oil production plant (see attached figure 2 Shown) the marked output layer (II15+16 上 ), put the instrument down to the layer Sa II15+16 in casing 4 上 at the measurement point of the well, that is, at a depth of 951.0 meters; after that, power is supplied to the current collector 3 motor through the surface device, so that the current collector 3 reaches a fully opened state, and at this time the annular space formed by the instrument and the casing 4 is covered by the current collector. 3 is completely sealed, forcing the oil-water two-phase mixed fluid 5 to flow in from the liquid inlet on the collector 3; flow through the electromagnetic flowmeter 2, and then flow out from the liquid outlet 1; since there is no Any component that obstructs...

Embodiment 2

[0025] Install the internal flow electromagnetic flowmeter 2 on the current collector 3 (see attached figure 1 shown), form a measuring instrument, lower the instrument into the casing 4, and then according to the logging notice of the oil production plant (see attached figure 2 shown) the marked output layer (Sa III4-7 3上 ), the instrument is lowered into the layer Sa III4-7 in casing 4 3上 at the measuring point, that is, at the depth of 972.8 meters; after that, power is supplied to the current collector 3 motor through the ground device, so that the current collector 3 reaches a fully opened state, and at this time the annular space formed by the instrument and the casing 4 is covered by the current collector. 3 is completely sealed, forcing the oil-water two-phase mixed fluid 5 to flow in from the liquid inlet on the collector 3; flow through the electromagnetic flowmeter 2, and then flow out from the liquid outlet 1; since there is no Any component that obstructs the f...

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Abstract

The present invention relates to an oilfield downhole flow combining type high aqueous oil-water two-phase flow measuring method which is based on an electromagnetic method and is used in the oilfield well logging field. The method mainly solves the problem of the failure that the prior oil-water two-phase flow is measured by a turbine flowmeter. The method is characterized in that a flow collector (3) is completely opened and seals an annular space formed by an apparatus and a sleeve (4); according to the liquid flowing frequency detected by an electromagnetic flowmeter (2), the flow of the liquid can be checked correspondingly to an apparatus demarcating plate. The method can measure successfully at a time, is simple for maintaining, works reliably and accordingly improves the economic benefit of oil gas exploration and development.

Description

Technical field: [0001] The invention relates to a flow measurement method used in the field of oil field logging. Specifically, the method is an electromagnetic method-based method for measuring the flow rate of oil-water two-phase flow of oilfield downhole concentrating type with high water cut. Background technique: [0002] At present, in the production process of oil fields, it is necessary to measure the oil-water flow rate produced in oil wells, especially for oil wells with high water cut, so as to grasp the production in time and provide basic information for decision-making of oil field production. If the flow rate of the oil-water two-phase flow produced by the oil well is measured, a turbine flowmeter is generally used. When the turbine flowmeter is actually used in the oil field, it needs to be placed in the measuring instrument, and then the instrument is placed in the measurement casing. During the measurement, the oil-water production fluid flows through the...

Claims

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Application Information

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IPC IPC(8): E21B47/00G01F1/58
Inventor 谢荣华刘兴斌张玉辉李军杨立黄春辉胡金海郭振雷吕鹏举蔡兵马水龙罗正权
Owner DAQING OILFIELD CO LTD
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