Device for controlling behind-column cross-flows

FIELD: oil and gas industry.

SUBSTANCE: device has container for marked liquid lowered on geophysical cable with depressurization assemblies and driving assemblies and measuring sensors, more than one. Measuring sensors are positioned above and below researched bed range no less than one on each side. As marked liquid, ferromagnetic liquid is used, and as measuring sensors - magnetic field measuring devices.

EFFECT: lower costs, simplified construction, higher precision.

1 dwg

 

The invention relates to the oil and gas industry, in particular to control means cross-flows of liquid and gas wells. It is known Device for controlling cross-flows” (patent RU №2057926, E 21 IN 47/10, 33/14, publ. BI No. 10, from 10.04.96 g) liquid and gas containing a column, a hollow container with a solution labeled” liquid and site depressurization of the container, the device is equipped with a sleeve with a through radial holes, placed on the outside of the columns and rigidly connected with the latter, and the container formed by the outer surface of the column and sleeve and is made with upper and lower pistons, recorded with the help of cutting elements on the column and separating the cavity of the container on nadmorska, responsavel and podporchennuyu the camera, while nadporshnevaya Luggage filled with air, the solution is “labeled” liquid placed in responsavel chamber, and site depressurization placed in podpornoy the camera and made in the form of powder charge with electrical ignition.

The disadvantages of this device are: first, the stationarity and uniqueness, that is, the inability to study a single unit short intervals several times during the life of the well; secondly, the use of explosive charge to release “labeled” fluid in Okolona space can lead to violations of the lining and, as a consequence, to provoke flows.

The closest in technical essence and the achieved result is “a Device for measuring the radioactivity of an isotope of an atom, is introduced into the lining well” (US Patent No. 4771635, E 21 In 47/10 from 29.01.87 g)containing the descent on the logging cable container labeled” radioactive isotope of the atom liquids with nodes depressurization and feed sensor for measurement of radioactivity.

The disadvantages of this device are: first, the use of radioactive substances, which requires the use of expensive materials for the container, attracting employees with access to the performance of such work and the application of increased security measures and, as a consequence, the inability to perform work forces serving teams, which together require high material costs; secondly, to measure the parameters you want to move the device up and down relative to the studied interval that excludes the possibility of the learning process over time in a stationary position, on the basis of what can be concluded about the speed of cross-flows.

The technical objective of the proposed invention is a device cheap, due to the use of non-radioactive substances to research cross-flows well, fine for the odd removal parameters in a stationary position, and, as a result, easy operation.

The proposed problem is solved by a device for controlling cross-flows containing descent on the logging cable container labeled” fluid nodes of the pressure loss and flow, and measuring the sensor.

What's new is that the device is equipped with measuring sensors more than one, with the measuring sensors are located above and below the investigated interval of the reservoir at least one on each side, and as “tagged” fluid ferromagnetic liquid, and as a measuring sensor device for measuring a magnetic field.

Analysis of the known similar solutions allows to make a conclusion about the absence of signs similar to the distinctive features of the claimed device, i.e. on the conformity of the proposed solutions to the criteria of “novelty” and “inventive step”.

The drawing shows a diagram of the operation of the device with two measuring sensors.

Device for controlling cross-flows consists of the descent on the logging cable 1 container 2 for “labeled” fluid (ferro fluid) with nodes depressurization and supply (not shown), the measuring sensor 3. The device is equipped with measuring sensors 3 more than one. Measuring sensors 3 are located above and n is also investigated interval h layer 4 at least one on each side.

The device operates as follows.

The device Assembly down on a logging cable 1 into the bore 5 and is fixed so that the measuring sensor 3 is situated in the investigation interval L, respectively, above and below the studied interval h layer 4, at least one on each side. Then the mouth (not shown) is pressurized and produce a control measurement parameters measuring sensors 3 to determine the natural magnetic background investigation interval L. then the signal from the logging cable 1 container 2 under the action nodes depressurization and feed rolls into the hole 5 of the ferromagnetic fluid, while at the same time with a mouth under pressure supplied technical liquid through the perforations 6 of the bore 5 crushes ferromagnetic fluid in the reservoir 4. Simultaneously measuring sensors 3 register change signal depending on time each separately. Based on the data received from the sensors 3, the conclusions about the presence of cross-flows, and their direction and magnitude, for example:

1. no change signal indicates the absence of cross-flows;

2. the signal change is negligible in the time - minor behind-the-casing flows;

3. signal changes, growing quickly in BP is like - behind-the-casing flows significant;

4. the signal change at the top or bottom shows the orientation of the violations from the studied interval h of the reservoir 4.

For more accurate determination of the depth of cross-flows and their intensity interval research L and the number of measuring sensors 3 on each side can be increased, and the parameters from each of the measuring sensor 3 are removed separately, but in the same time scale.

The use of the proposed device allows cheaply, simply and accurately determine the presence, direction and intensity of cross-flows in the borehole due to the use of non-radioactive substances and by removing parameters from sensors located in a stationary position.

Device for controlling cross-flows containing descent on the logging cable container labeled” fluid nodes of the pressure loss and flow, the measuring transducer, characterized in that the device is equipped with measuring sensors more than one, with the measuring sensors are located above and below the investigated interval of the reservoir at least one on each side, and as “tagged” fluid ferromagnetic liquid, and as a measuring sensor device for measuring a magnetic field.



 

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EFFECT: higher precision.

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EFFECT: lower costs, simplified construction, higher precision.

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