Method and device for well survey based on infrared well wall radiation

FIELD: well survey, particularly to control technical condition of oil well sections over or under hydrostatic well level, as well as of gas well under pressure, by repeated non-contact measurement of infrared well wall surface radiation.

SUBSTANCE: device comprises body, protective optical system window, infrared radiation receiver, modulator, thermostat, infrared radiation chopping frequency stabilizing block, thermostating and thermostabilizing unit, signal amplifying and converting unit, body temperature sensor, electronic body temperature sensor signal amplifying unit; electronic protective window radiation compensation unit. Receiver pickup converts infrared well wall radiation and protective window radiation into electric signal. Contact temperature sensor installed in device body generates electric signal, which is proportional to protective window temperature. Said signal is supplied to electronic body temperature sensor signal amplifying unit and to compensation unit and is mixed with electric signal generated by radiation receiver to compensate signal component defined by protective window radiation in real time so that user registers only electric signal proportional to infrared well wall radiation.

EFFECT: decreased measurement time along with decreased costs.

2 cl, 1 dwg

 

The invention relates to geophysical research wells and is designed to control the technical condition of the wells based on measuring the intensity of infrared (IR) radiation from the inner surface of the borehole wall.

A device for measuring temperature in a borehole containing a receiver IR radiation and the amplifier-Converter installed in the cylindrical housing (see A.S. USSR №1686146, IPC EV 47/06).

A method of measuring temperature well implemented in this device, based on the measurement of radiation heat transfer plates are made from opaque to infrared radiation material.

This increases the inertia of the measuring device, reduces the reliability of the measurement results, it is not possible to measure the temperature of the inner surface of the oil well above the hydrostatic level and gas wells.

Closest to the claimed is a device for studies of borehole and contactless measurement of temperature, comprising a housing, a protective window made of transparent to infrared radiation material, receiver infrared radiation modulator infrared radiation, thermostat, electronic components to stabilize the frequency of rotation of the modulator, control and stabilization, amplification and conversion of the signal (see patent RU No. 2237161 IPC EV/10; 47/06).

The way research is well implemented in this device, includes a connection device logging cable to a recording device at the surface, sinking device in the borehole, measuring continuously and avoidant intensity of the IR radiation from the borehole wall, the transmission of measurement results via logging cable to the surface, the write data in the memory of the onboard computer in function of the depth of the well, removing the user data using a plotter in the form of geophysical curve.

This device and method is well established in the study of cross-flows in oil wells above the hydrostatic level. However, this device and method may be used for examination of the technical condition of oil wells below the hydrostatic level and gas wells under pressure. The reason for the sharp decrease in the sensitivity of the device to the temperature difference between two adjacent sections of the borehole wall. The decrease in sensitivity is due to the fact that the protective window of the optical system is translated in these conditions in the optically active state and informative radiation from the borehole wall is added uninformative component of the radiation protective window. In addition, in these conditions increases inertion the efficiency of the measurement process, that is not possible with certainty to determine the position of the artifact on the well depth.

The present invention solves the problem of determining the technical condition of oil wells both above and below the hydrostatic level, as well as a gas well under pressure, by non-contact continuous measurement of the infrared radiation of the inner surface of the well.

The technical result achieved by the invention is to reduce the time of operation of the measurement while reducing costs.

This object is achieved in that the device for the study of wells, comprising a housing, a protective window of the optical system, the receiver-infrared radiation modulator, thermostat, electronic units amplification and conversion of the signal to stabilize the frequency of rotation of the modulator, control and stabilization, equipped with an additional temperature sensor housing and electronics to amplify the signal of the sensor and the electronic unit compensation radiation protective window in real time.

The way research is well implemented in this device, based on the measurement of infrared radiation, the inner surface of the borehole wall and compensation radiation protective window in real time.

The invention explains what I'm drawing, which presents a block diagram of the measuring device.

The inventive device includes a housing 1, a protective window of the optical system 2, the receiver IR radiation 3, a modulator 4, thermostat 5, the stabilization unit interrupt frequency IR radiation 6, block thermal management and thermal stabilization 7, the power amplification and conversion of the signal 8, the temperature sensor housing 9, the electronic unit to amplify the signal of the temperature sensor housing 10, the electronic unit compensation radiation shielding window of the optical system 11.

The device operates as follows. Spuskaemogo device connect the logging cable to a recording device located on the surface. When the power is turned on and begins to operate electronic components included in the device. The electronic unit 6 displays the frequency of rotation of the modulator 4 in the operating mode and maintains the desired interrupt frequency infrared radiation. Unit 7 displays the temperature of thermostat 5 to preset mode by setting the datum. Further, the device is lowered into the well with a speed of, for example, 0.4 m/s IR radiation from the inner surface of the borehole passes through the protective window of the optical system 2, is interrupted by a modulator 4, and arrives at a receiver IR radiation 3, the sensing element of the receiver converts the radiation into an electrical signal. At the same time, in% the CE descent, protective window 2 devices being in thermal contact with the environment and the well wall, monitors microascales temperature well defined natural geothermal. Radiation protective box 2 carries no information about the technical condition of the borehole wall, but getting to the modulator 4 and further to the receiver 3, fills the non-informative part of the dynamic range of the measuring path. Thus, the sensing element of the receiver converts into an electrical signal, not only the radiation from the walls of the well, but the radiation protective window of the optical system.

Simultaneously, a contact temperature sensor 9 installed in the housing 1 of the device produces an electrical signal proportional to the temperature of the protective window 2. This signal is supplied to the power amplification of the signal of the sensor 10 and later in the compensation unit 11, which is kneaded with an electric signal in this block from the radiation receiver 3, thereby to compensate in real-time component of the signal caused by radiation protective window 2. In the power amplification and conversion of the signal 8 is supplied to only the electrical signal proportional to the infrared radiation from the borehole wall. In block 8, the signal is converted into parallel desethylatrazine binary code, which is then in the interface biocassava converted, but the serial code for the transmission line information. As the code uses bipolar photomanipulating code. With a transmission line of code information flows in the logging logger, where the data record in the memory of the onboard computer in the function of well depth. Next, the data of the measurement results of IR radiation from the borehole wall using the plotter is displayed to the user in the form of geophysical curve.

1. Device to research well on the infrared radiation of the wall, comprising a housing, a protective window of the optical system, an infrared receiver, a modulator, thermostat, electronic units gain conversion signal to stabilize the frequency of rotation of the modulator, control and stabilization, equipped with an additional temperature sensor housing, the electronic unit of the signal gain of the sensor and the electronic unit compensation radiation protective window in real time.

2. The method of study of the well, including a connection device logging cable to a recording device at the surface, sinking device in the borehole, the measurement is continuous and non-contact intensity of infrared radiation from the borehole wall, the transmission of measurement results via logging cable to the surface, the write data in the memory boron is a new computer in the function of well depth, removing the user data using a plotter in the form of geophysical curve, characterized in that in the process of descent continuously measure and compensate in real-time component of the signal caused by radiation protective window.



 

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SUBSTANCE: device comprises three identical heat-sensitive sensors arranged along well axis at predetermined locations and adapted to measure the second temperature difference, namely the first, the second and the third ones. Each heat-sensitive sensor includes four identical heat-sensitive resistors constituting heat-sensitive bridges. Heat-sensitive bridge unbalance difference is proportional to the second temperature difference. Unbalance sum is proportional to the first temperature difference. All heat-sensitive resistors are used to measure absolute temperature of probe receiving medium. The first temperature difference depends on constant temperature change along well bore and on local temperature change. The second temperature difference depends only on local temperature change.

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FIELD: survey of boreholes or wells, particularly measuring temperature or pressure in running wells.

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7 cl, 1 dwg

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9 cl, 3 dwg

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2 cl, 2 dwg, 1 ex

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2 dwg

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5 dwg

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EFFECT: enhanced precision.

FIELD: mining industry.

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4 dwg

FIELD: electric generators adapted to supply power to downhole apparatuses, namely to pressure compensators included in generator lubrication systems.

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3 cl, 9 dwg

FIELD: oil and gas industry, particularly to supply power to independent tools lowered to well bottom.

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2 dwg

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EFFECT: optimized well operation.

2 dwg

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