SU1421858A1 - Method and apparatus for determining the profile of fluid inflow in operating gas well - Google Patents

Abstract

The invention relates to the field of geophysical research. The purpose of the invention is to increase the accuracy of determination. In the casing, the column with perforated holes 4 is lowered, muffled by plug 2, into the lower part of the tower; These tubing pipes (tubing) 1. Remove the thermogram and determine (L L9 cd 00

Description

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the profile of the influx of reservoir fluid by the T-type anomalies m in thermograms. Through the holes periodically report the pipe and the annulus of space above the interval of the holes of the column. At the same time, the thermograms are taken on various operating modes of the well. The device for the implementation of the method contains a node of blocking the holes, made rotatable at a fixing angle up to 9t) ° of the rotor flap 7 with holes 8, made on the same axis with the holes of the tubing 1. Inside

the rotor flap 7 is placed the stator 12 with a three-phase winding 11. The total area of the holes in the tubing 1 is not less than the area of the flow section of the latter. At the approach of the stator to the damper rotor 7, a three-phase supply current is impulsively supplied. The latter is transmitted to the windings 11 so that the rotation of the rotor-flap 7 soothes the message of the tubular and annular space, the Tooe holes 8 and the holes in the tubing 1 are aligned with 2 CoP f-ly, 2 silt

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The invention relates to geophysical studies, in particular to studies of existing wells, including those with abnormally high reservoir pressure, and wells equipped with a packer, and can be used in gas, oil and hydrogeological wells.

The purpose of the invention is to increase the accuracy of determining the flow profile of a fluid in an active, gas well

; Fig. 1 shows a scheme for implementing the method; FIG. 2 shows the terms. ..

In order to implement the proposed method, the pump-compressor tubing (NKT) 1 filled with liquid is provided with a plug 2 and a straight valve 3 (which can be replaced with a rubber ball), which has the shape of a tapered cuff. Above the top perforations. 4 of the casing 5 and below the production packer 6 is installed a part of the electromagnetic device - the rotor valve 7, made in the form of a cypindric pipe segment of magnetic material. On the inner surface of the cylindrical pipe section there are kaivas filled with metal with malm electrical resistance (for example, aluminum) so that 1SCHLINDR is a well-known design of an external hollow rotor with holes made on the same axis with tubing holes (in the form of a squirrel wheel) short-circuited engine.

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There are two holes 8 in the wall of the rotor flap.

The rotor valve is installed in the pipe 9, which is rigidly welded to the tubing. The nozzle has two openings 10 located on the same axis with the openings 8 of the flap. With this arrangement, the holes through them there is a message tube and annular space. :.

The rotation of the rotor flap 7 at a certain angle (up to 90) is carried out under the action of the electromagnetic field of the three-phase winding 11 of the stator 12, which is located inside the rotor flap and lowers into the tubing on the cable 13 and impulsively turns into the 3oiie flap 7. The counterweight 14 prevents the unwinding rotor at the time of pulse switching. As a result of the rotation of the rotor flap 7 at some angle, the pipe and annulus space are separated, since the holes 10 of the tubing do not coincide with the holes 8 in the rotor flap. The total area of the holes in the tubing is not less than the area of the tubing through passage "

The device works in the following way:

In the disengagement mode (the openings 8 in the rotor gate and the openings 10 in the tubing are offset from each other), the straight valve 3 is lowered into the well under the pressure of the injected fluid. Then, a three-phase stator 12 is lowered on the cable 13 and, when approaching the rotor-valve 7, a three-phase supply current is impulsively supplied to the stator windings so that the rotation of the rotor-valve corresponds to the tube and annulus space, i.e. 8 holes in the rotor flap and holes. 10 in the tubing Then, using a geophysical instrument, background recording is performed with the valve closed at the wellhead. Then the valve is opened and measurements are taken and thermograms are recorded in various modes of operation of the well "After performing geophysical

research with the help of electromagnetic ig and through the holes under the packer,

The device disassociates the pipe and annular space by supplying the supply current to the three-phase stater windings in such a way as to rotate the roto-2-valve to close the holes 10 in the tubing, then remove the cap on the tubing boot and the operation of the well is done through tubing.

Example, Method f. laboratory conditions on a gas well model with simulated five gas-bearing formations of different productivity.

Temperature sensors are installed throughout the wellbore model. Results of tests performed / shown. Fig. 2, where 1-5 are marked locations of gas-bearing layer simulators.

Temperature curve 6 (figure 2),. is a straight line, which corresponds to the same temperature along the wellbore, obtained in the absence of gas movement.

Thermogram 7 (Fig „2) corresponds to model measurements during gas movement, when difficult and annular space communicates from below through the tubing shoe. As can be seen in this curve, the temperature deviation is observed only against the simulator of the gas-bearing formation (temperature anomalies; temperature is 0.02 °). Other working intervals on the thermogram are not selected.

Curve 8 (Fig. 2) corresponds to the temperature distribution along the wellbore when the tube and annulus communicate through a hole in the tubing, which is opened and closed using an electromagnetic device, and these holes are located above the productive formations, but below section 40

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pipe and annulus space packer

Bottom tubing muted. As can be seen from the obtained thermogram, negative for each a-layer imitator, anomalies from 0.1 to 0.2 are noted.

Comparison of the obtained curves shows a greater efficiency of the method due to the fact that the well flow rate increases due to the possibility of working both through the pipe and through the pipe, it is possible to work the well through the lower end.

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There is a possibility of precise fit of the working intervals, which makes it possible to purposefully carry out work on the intensification of wells

Formula of invention

1. A method for determining the fluid flow in an active gas well, including lowering plugged in the lower part of the Iasra-contactor pipes into a casing with perforated holes and removing thermograms and determining the flow of the flux fluids from the thermometer, and measuring the thermograms and determining the flow of the flux fluids from the thermometer, and measuring the thermograms and determining the flow flux of the reservoir flute through the thermometer and determining the thermograms and determining the flow flux of the reservoir flute through the thermometer and measuring the thermograms and determining the flow flux of the reservoir flute through the thermometer and measuring the thermograms and determining the flow flux of the reservoir flute through the thermometer and measuring the thermograms and determining the hydraulic flux of the reservoir flute through the thermometer and measuring the thermograms and determining the hydraulic flux of the flux fluorescent tubes by measuring the thermograms and determining the thermograms. anomalies m on thermo. grams5, which is due to the fact that, in order to improve the accuracy of the test, periodically report the pipe and backpipe spaces of the casing perforations, and the removal of thermogram 1 makes

, on various modes of operation squalane

2, The device for the determination, purpose of the pro-fluid flow in the current

a gas well including fluid-filled tubing pipes with a plug at the bottom and. Installed in their temperature sensor5 characterized by

that, in order to improve the accuracy of the enamel.-division, in the pump-compressor pipes there are holes for the communication of the tubular and annular spaces

The Q device is equipped with installed tubing pipes at the top of the orifice closure, executed in the form of a rotor gate rotated at a fixed angle up to 90 ° with openings axially aligned with the tubing openings rotor flap stat-. pa with three-phase winding, and sum5

514218586

The marna has a hole area of the pumping-through section of the pumping and compression compressor pipes that are not less than the square pipes.

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Claims (2)

Claim 1. The method of determining the profile of fluid inflow in an existing gas well, including the descent of plugged in the lower part of the tubing into the casing with perforated holes, the removal of thermograms and determining the profile at. reservoir fluid flow according to temperature anomalies in thermograms, with · t — characterized in that, in order to increase the accuracy of determination, periodically · report tubular and annular spaces above the interval of perforation holes of the casing string, and the removal of the “thermograms” is carried out in various operating modes wells. 2, A device for determining the profile of fluid inflow in an existing gas well, including tubing filled with liquid with a plug in the lower part and a temperature sensor installed in them 45 ry, characterized in that, in order to improve the accuracy of the distribution. · Divisions, holes for communicating tubular and annular spaces are made in the tubing, the 5Q device is equipped with a hole overlap assembly installed in the tubing made in the form of rotation through a fixed angle of up to 90 ° _{55 of the} rotor-shutter with holes made on the same axis as the openings of the tubing and placed inside the rotor-shutter stato. with a three-phase winding, and the sum 5 1421858 measured hole area of the tubing is not less than the area of the bore of the tubing. '' Compiled by G. Maslova