RU77346U1 - DEVICE FOR GEOPHYSICAL RESEARCH - Google Patents

Abstract

It is used in the extraction of oil, gas or water to control the parameters of technological processes by geophysical methods. The device comprises a receiver and a transmitter for electromagnetic communication with a transmitter-receiver at the wellhead, connected to an information archive, recording equipment connected to the receiver and, through recording equipment, to an information archive, and a power battery. Along the length of the well, intermediate transmitting and receiving devices are installed based on at least one device every 2000 meters. It is possible to transmit to the surface a signal that carries information about downhole processes without loss of signal power in real time.

Description

The utility model relates to the field of oil, gas or water production and can be used in the production process in order to control the parameters of technological processes by geophysical methods.

In practice, various geophysical instruments have been widely used for a long time and are used to study and control well parameters - flow rate, humidity, pressure, temperature, etc. However, the installation, installation, and operation of the instruments require stopping the electric centrifugal pump (ESP) and other downhole equipment, which leads to downtime and reduced production volumes. Regular installation and dismantling of equipment is also required, which reduces its reliability.

In order to eliminate these shortcomings, attempts were made to combine oil (gas or water) production with the transmission of information along the veins of the geophysical cable from research instruments installed in the borehole under the ESP (see NN Krivko, VD Sharovarin. Production and geophysical equipment and equipment. M: Nedra, 1981, p. 8, 161).

A disadvantage of the known device is the difficulty of launching and placing the pump in the well together with the geophysical cable and instruments, as well as the presence of electromagnetic interference from running engines, the pump and the power cable.

An information transmission device is also known, in which information about the parameters of the well is recorded in the long-term memory of autonomous devices and read after it is removed to the surface when the planned life of the production pump and devices in the well ends (see V.N. Vasilevsky, A.I. .Petrov. Technique and technology for determining the parameters of wells and reservoirs. M: Nedra, 1998, p.209).

A disadvantage of the known device is that information about the progress of technological processes under the ESP in the production process arrives at the surface after some time, when it is no longer possible to influence the process.

There is also known a device for geophysical exploration, adopted as a prototype, which contains recording and recording equipment installed in the housing, an information archive, a transmitter and receiver for electromagnetic communication with a transmitter-receiver at the wellhead and a battery (see RF patent No. 24702). Information is extracted from the archive at certain scheduled intervals and transmitted to the surface for the purpose of analysis and subsequent adjustment of technological parameters in the well.

The disadvantage of the prototype is the inability to transmit information to the surface continuously, i.e. in real time.

The objective of the invention is to provide a device for transmitting information from a well, devoid of the disadvantages of the prototype and analogues.

The technical result achieved by using the proposed device is the ability to transmit to the surface a signal that carries information about downhole processes without loss of signal power in real time.

The specified technical result is achieved by the fact that in the device for geophysical exploration, which contains the recording equipment installed in the housing, connected through the recording equipment to the information archive, a receiver and transmitter for electromagnetic communication with the transmitter-receiver at the wellhead, connected to the information archive, and power batteries, according to the utility model, the recording equipment is connected additionally to the receiver, and intermediate receiving and transmitting are installed along the length of the well devices based on at least one device every 2000 meters.

Connecting the recording equipment directly to the receiver allows you to transmit information continuously or by calculation discretely in real time to the receiving and transmitting device on the surface.

The fact that intermediate receiving and transmitting devices are installed along the length of the well ensures the amplification of the electromagnetic signal and its delivery to the surface even in the case of weak signals in the well. Based on their experience, the signal attenuation in the well occurs after about 1900 m, so it is necessary to install intermediate transmitting and receiving devices based on at least one device every 2000 m.

The proposed device for geophysical exploration in an oil, gas or water well is shown in the drawing.

The device comprises a recording apparatus 2 installed in the housing 1, which is sensors located on the entire inner surface of the housing 1, which directly read the parameters of the downhole processes. The recording equipment 2 is connected to the recording equipment 3, from which the information enters the archive 4. A receiver 5 and a transmitter 6 of electromagnetic signals are connected to the information archive 4. The recording equipment 2 is additionally connected to the receiver 5. Power batteries 7 are located in the lower part of the housing 1.

At the wellhead, a transmitting and receiving device 8 is installed, and intermediate receiving and transmitting devices 9 are installed along the length of the well.

A device for geophysical exploration works as follows.

The device is lowered into the well and installed in the interval in which geophysical surveys are planned. The housing 1 of the device is fixed, for example, using an anchor.

After that, the receiving-transmitting device 8, installed at the wellhead, sends a signal to the receiver 5 to turn on the recording equipment 2, recording equipment 3, information archive 4 and power batteries 7.

In the process of geophysical exploration, the sensors of the recording equipment 2 record the parameters of the technological processes carried out in the studied interval of the well.

Information from the recording equipment 2 goes to the recording equipment 3, and then to the archive 4. Information can be read from the archive 4 after lifting the device to the surface. However, the device operates in the well, as a rule, autonomously for several months. Therefore, if necessary, information is read from the archive 4 of information at a command from the receiving and transmitting device 8 by supplying a signal to the receiver 5 and transmitter 6. After reading the required information, a signal is sent from the receiving and transmitting device 8, respectively, to turn off the receiver 5 and transmitter 6 .

Direct connection of the recording equipment 2 to the receiver 5 allows you to transmit information to the surface continuously or by calculation discretely in real time. Thus, it is possible to continuously and quickly obtain information from the device for geophysical research in order to analyze the measurement results and subsequent control of technological processes in the well.

In cases where geophysical surveys are carried out in depth intervals of more than 2000 m, intermediate transmitting and receiving devices 9 are installed along the well length.

Thus, the proposed device provides the specified technical result in the form of the possibility of transmitting to the surface a sufficiently powerful signal in real time.

Claims (1)

A device for geophysical exploration, comprising recording equipment installed in the housing, connected via recording equipment to the information archive, a receiver and transmitter for electromagnetic communication with the receiving and transmitting device at the wellhead, connected to the information archive, and a power battery, characterized in that the recording equipment connected in addition to the receiver, and along the length of the well intermediate transceivers are installed based on at least one device each 2000 meters