CN216248329U - Controllable seismic source in well - Google Patents

Abstract

The utility model provides a novel controllable seismic source in a well, which comprises a shell, a high-temperature-resistant detonator, a high-temperature-resistant explosive column and a VLF receiver, wherein the high-temperature-resistant detonator, the high-temperature-resistant explosive column and the VLF receiver are all positioned in the shell, the VLF receiver is positioned above the high-temperature-resistant explosive column, and the high-temperature-resistant detonator is positioned in the high-temperature-resistant explosive column and the VLF receiver. The novel controllable seismic source in the well is a cable-free remote control excitation seismic source, can be placed in a deep layer, is resistant to high temperature and high pressure, and is suitable for special underground environments.

Description

Controllable seismic source in well

Technical Field

The utility model relates to the technical field of oilfield development, in particular to a novel controllable seismic source in a well.

Background

The excitation sources which can be used for the borehole seismic technology at present comprise explosion, radial radiation pulse, electric spark, mechanical pulse, piezoelectric electromechanical transduction, frequency-controlled scanning vibration and the like, and the excitation sources excite signals according to different principles, although part of the excitation sources can meet the requirements of borehole excitation operation, the excitation characteristics, the reliability, the adaptability and the like are greatly different, and the excitation sources cannot be completely suitable for the borehole seismic technology.

In the application No.: 011241705, which relates to a high-resolution three-dimensional three-component seismic exploration source bomb and a manufacturing method thereof, discloses a low detonation velocity (D1700-2600 m/s) source bomb for three-dimensional three-component seismic exploration of petroleum and coal fields, and comprises the following components, by weight, 46-55.5 parts of emulsified paste, 3.0-5.0 parts of foam plastic carriers and 40-50 parts of activated water-resistant ammonium nitrate. The seismic source bomb has compression-resistant and waterproof performances only in a deep well (within 30 meters), and has a limit on application depth.

In the application No.: 2016100204648, relates to a well controllable seismic source used full hydraulic hole reaction mechanism, including reaction oil cylinder and support device, wherein the reaction oil cylinder is connected at the lower part of the support device, the support device is provided with a plurality of support oil cylinders, the plurality of support oil cylinders are all linked with a first oil pipe, each support oil cylinder is connected with a first oil return pipe, the plurality of first oil return pipes are linked together, the reaction oil cylinder is communicated with a second oil pipe, the reaction oil cylinder is also connected with a second oil return pipe, the first oil pipe and the first oil return pipe are controlled by the support controller of a hydraulic control console, the second oil pipe and the second oil return pipe are controlled by the reaction controller of the hydraulic control console. The seismic source counter-force mechanism solves the problem that the whole set of equipment is large because the controllable seismic source provides counter-force by self weight in the prior art, and effectively reduces the complexity of the system. The application reduces the weight and the volume of peripheral equipment, so that the vibroseis can be popularized and used in mountain exploration, and the application fails to provide an excitation source for borehole seismic technology.

In the application No.: 2021100548567, the device mainly comprises an upper joint, a pressure-bearing cylinder, an ignition cable, a thermal expansion agent, a pressure ring, a shear slice, a tail joint and a seal ring, wherein the upper joint is in threaded connection with the pressure-bearing cylinder, the thermal expansion agent is filled in the pressure-bearing cylinder, the ignition cable penetrates through a central hole of the upper joint and is placed in the expansion agent in the pressure-bearing cylinder, the other end of the tail joint is in threaded connection with the other end of the pressure-bearing cylinder and is sealed by the seal ring, the end of the tail joint close to the pressure-bearing cylinder is internally provided with the pressure ring, the shear slice is pressed in the tail joint by the pressure ring, and the pressure ring, the tail joint and the shear slice are sealed by the seal ring. The patent relates to a thermal expansion bearing hydraulic deep well seismic source device, which is internally provided with a thermal expansion agent and has no cable remote control excitation function.

The prior art is greatly different from the utility model, and the technical problem which is required to be solved by people cannot be solved, so that a novel controllable seismic source in a well is invented.

SUMMERY OF THE UTILITY MODEL

It is an object of the present invention to provide a novel vibroseis in a well that solves the problem of lack of a suitable downhole seismic source.

The object of the utility model can be achieved by the following technical measures: the novel controllable seismic source in the well comprises a shell, a high-temperature-resistant detonator, a high-temperature-resistant explosive column and a VLF receiver, wherein the high-temperature-resistant detonator, the high-temperature-resistant explosive column and the VLF receiver are all located in the shell, the VLF receiver is located above the high-temperature-resistant explosive column, and the high-temperature-resistant detonator is located in the high-temperature-resistant explosive column and the VLF receiver.

The object of the utility model can also be achieved by the following technical measures:

the novel vibroseis in the well further comprises an antenna and a ground transmitter, wherein the antenna is positioned at the top of the shell, the VLF receiver receives the coded wireless signals transmitted by the ground transmitter through the antenna, the ground transmitter is triggered when the VLF receiver is triggered, the received coded wireless signals are converted into electric signals in the stratum to detonate the high-temperature resistant detonator, and then the high-temperature resistant explosive column is triggered.

Very Low Frequency (VLF) frequency is used for wireless signal transmission between the VLF receiver and the terrestrial transmitter.

The housing is cylindrical, 50cm in length and 9cm in diameter.

The shell is made of plastic steel.

The dosage of the high temperature resistant grain is more than 1kg and less than 2 kg.

The novel controllable seismic source in the well further comprises an inverted sawtooth anti-slip cap, wherein the inverted sawtooth anti-slip cap is installed at the bottom of the shell, and the novel controllable seismic source in the well is fixed at the sinking depth.

The novel controllable seismic source in the well is a cable-free remote control excitation seismic source, can be placed in a deep layer, resists high temperature and high pressure, and is suitable for special underground environments.

The novel vibroseis in the well can be placed in the stratum in the well by utilizing the drill pipe or the casing pipe, and the operation is convenient.

The novel controllable seismic source equipment in the well is light and convenient, and has good excitation consistency.

The shell of the novel vibroseis in the well is made of plastic steel, and has the characteristics of light weight and pressure resistance.

The novel controllable seismic source in the well inputs the specific password and the excitation frequency, and when the novel controllable seismic source needs to be excited, the ground transmitter is used for triggering the specific number to excite the underground corresponding seismic source, so that the safety is realized.

The novel underground vibroseis in the well is a suitable commercial underground vibroseis, and can be buried in the deep layer, resistant to high temperature and excited under control.

Drawings

Fig. 1 is a block diagram of one embodiment of the novel vibroseis in a well of the present invention.

Detailed Description

It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the utility model as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the utility model. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of the stated features, steps, operations, and/or combinations thereof, unless the context clearly indicates otherwise.

Example 1

Fig. 1 is a block diagram of a novel vibroseis in a well according to the present invention, as shown in fig. 1. The novel controllable seismic source in the well mainly comprises a 1-plastic steel shell, a 2-inverted sawtooth anti-slip cap, a 3-high temperature resistant detonator, a 4-high temperature resistant explosive column, a 5-VLF receiver, a 6-antenna and a 7-ground transmitter.

The bottom of a novel controllable seismic source plastic steel shell 1 in a well is provided with an inverted sawtooth anti-slip cap 2, and a seismic source is fixed at the sinking depth. A high-temperature resistant detonator 3 made of high-temperature resistant explosive, a high-temperature resistant explosive column 4 and a VLF receiver 5 are arranged in the high-temperature resistant detonator, and an antenna 6 is arranged at the top of the plastic steel shell 1. When the high-temperature resistant detonator is excited, the ground transmitter 7 is triggered, the VLF receiver 5 receives the coded wireless signal in the stratum and then converts the coded wireless signal into an electric signal to detonate the high-temperature resistant detonator 3, and then the high-temperature resistant explosive column 4 is excited. The novel controllable seismic source in the well can be placed in a deep layer, is high-temperature resistant and is remotely excited without a cable.

Example 2

In one embodiment, the novel controllable seismic source in a single well is cylindrical, the length of the controllable seismic source is 50cm, the diameter of the controllable seismic source is 9cm, the shell is made of plastic steel, the controllable seismic source has the characteristics of light weight and pressure resistance, high-temperature-resistant explosive is arranged in the plastic steel shell, and the explosive amount is more than 1kg and less than 2 kg. The novel controllable seismic source in the well is placed in the stratum in the well by using the drill pipe or the casing pipe, and the inverted sawtooth anti-slip cap is arranged at the bottom of the novel controllable seismic source in the well, so that the seismic source can be fixed at the sinking depth.

The novel controllable seismic source in the well is a cableless remote control excitation seismic source, and a very low frequency (VLF-very low frequency) is adopted in an excitation system.

The cableless remote control excitation system of the novel vibroseis in the well consists of a ground transmitter and a VLF receiver;

the cableless remote control excitation system consists of a ground transmitter and a VLF receiver. The seismic source inputs a specific password and an excitation frequency, and when the seismic source needs to be excited, the ground transmitter is used for triggering a specific number to excite the corresponding underground seismic source.

Each point location seismic source inputs a specific password and an excitation frequency, and when the point location seismic source needs to be excited, a ground transmitter is used for triggering a specific number to excite a corresponding underground seismic source.

Example 3:

in the specific embodiment 3 applying the utility model, the high-temperature resistant explosive is arranged in the novel vibroseis plastic steel shell in a single well, the high-temperature resistant explosive is composed of powdery high-energy explosive serving as a main body and additional components such as a bonding agent and the like, and the melting point is 322-323 ℃.

The novel controllable seismic source in the well is a cableless remote control excitation seismic source, and the excitation system adopts a very low frequency (VLF-very low frequency) and excites the wireless frequency range of 3-30 kHz; the wavelength range is 100-10 kilometers (km).

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the utility model. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

In addition to the technical features described in the specification, the technology is known to those skilled in the art.

Claims (7)

1. The novel controllable seismic source in the well is characterized by comprising a shell, a high-temperature-resistant detonator, a high-temperature-resistant explosive column and a VLF receiver, wherein the high-temperature-resistant detonator, the high-temperature-resistant explosive column and the VLF receiver are all located in the shell, the VLF receiver is located above the high-temperature-resistant explosive column, and the high-temperature-resistant detonator is located in the high-temperature-resistant explosive column and the VLF receiver.

2. The source of claim 1, further comprising an antenna and a surface transmitter, wherein the antenna is located at the top of the housing, and wherein the VLF receiver receives the coded radio signal from the surface transmitter via the antenna, and when activated, activates the surface transmitter, and the VLF receiver converts the received coded radio signal into an electrical signal in the formation to detonate the refractory detonator, and then activates the refractory charge.

3. The vibroseis in a well as claimed in claim 2, characterized in that the VLF receiver and the surface transmitter use very low frequency for wireless signal transmission.

4. The novel vibroseis in a well as claimed in claim 1, wherein the housing is cylindrical with a length of 50cm and a diameter of 9 cm.

5. The novel vibroseis in a well as claimed in claim 1, wherein the housing is made of plastic steel.

6. The novel vibroseis in a well as claimed in claim 1, wherein the dosage of the refractory charge is more than 1kg and less than 2 kg.

7. The novel source of claim 1, further comprising an anti-slip cap mounted on the bottom of the housing to secure the novel source at a set depth.

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