RU216483U1 - AUTONOMOUS BOTTOM SEISMIC STATION - Google Patents

Abstract

The utility model relates to devices for carrying out bottom seismic exploration and is intended for recording seismic signals, primarily during offshore seismic surveys, as well as in the transit zone and on land areas adjacent to the studied marine areas. The technical result is to increase the accuracy of the data obtained during reconnaissance due to the reliability of the protection of the hardware and software complex of the station. The essence of the utility model lies in the fact that the autonomous bottom seismic station contains a sealed housing, which houses a hardware and software system for conducting research using multicomponent seismic survey technology. According to the utility model, the hull is provided with a bandage made in the form of parts connected to each other and to the hull, located outside the hull with the possibility of protecting the hull and equipment elements protruding from the hull from impacts during their installation on the bottom and when lifting onto the vessel. At the same time, the bandage is provided with protruding elements made in the form of lugs and in contact with the supporting surface when the station is at the bottom. 1 w.p. f-ly, 3 ill.

Description

The utility model relates to devices for carrying out bottom seismic exploration and is intended for recording seismic signals, primarily during offshore seismic surveys, as well as in the transit zone and on land areas adjacent to the studied marine areas.

Known autonomous bottom seismic station containing a sealed housing, which houses the hardware and software complex for research on the technology of multicomponent seismic exploration (patent RU No. 24890 U1, pub. 27.08.2002).

The disadvantages of the station are the unsatisfactory reliability of maintaining the operability of the hardware-software complex, leading to insufficient reliability and accuracy of the transmitted and recorded data.

The technical problem is to ensure the operability of the station under various external influences with the required accuracy of the data obtained.

The technical result consists in increasing the accuracy of the data obtained during reconnaissance due to the reliability of the protection of the hardware and software complex of the station.

The problem is solved and the technical result is achieved by the fact that the autonomous bottom seismic station contains a sealed housing, in which a hardware and software complex is located for carrying out research using the technology of multicomponent seismic exploration, while, according to the utility model, the housing is equipped with a bandage made in the form of interconnected and with a body of parts located outside the body with the possibility of protecting the body and the elements of the equipment protruding from the body from impacts during their installation on the bottom and when lifting onto the ship, while the bandage is equipped with protruding elements made in the form of lugs and in contact with the supporting surface when bottom stations.

The technical result is also achieved by the fact that the lugs can be located with the possibility of fixing the stations when they are stacked on the deck of the vessel and during transportation.

The utility model is illustrated with the help of drawings.

In FIG. 1 shows the outside of the station;

In FIG. 2 - the same, front view;

In FIG. 3 shows the internal structure of the station body.

The described autonomous bottom seismic station contains a sealed housing 1, which houses a hardware-software complex for carrying out research using the technology of multicomponent seismic exploration. The body 1 is equipped with a bandage 2, made in the form of parts connected to each other and to the body 1, which are located outside the body 1 with the possibility of protecting it and the elements 3, 4 and 5 of the equipment protruding from the body 1 from impacts during their installation on the bottom and during lifting to the ship. The bandage 2 is provided with protruding elements made in the form of lugs 6 and interacting with the supporting surface when the station is at the bottom.

The lugs 6 can be located with the possibility of fixing the stations when they are stacked on the deck of the vessel and during transportation.

The following elements are placed inside the body 1.

Sealed connector 4 (protected by a plug when working underwater), the main functions of which are charging the battery and reading information;

sensors (primary transducers): three electrodynamic geophones (one vertical and two horizontal), combined into a block of 7 geophones, providing an accurate geometric location of geophones, as well as a hydrophone 5. The sensors are connected to the sensor module;

power supply 8, including:

battery assembly;

power supply controller module that manages and collects information about the operation of the battery assembly.

registration block 9, including:

ADC module that digitizes analog signals from sensors,

data acquisition module that collects data from the ADC,

a controller module responsible for writing data to memory, controlling the indication, communicating the station with external equipment using ethernet technology;

interface module (environment sensor that allows you to determine the humidity, pressure and temperature inside the body of the bottom station);

compass-inclinometer, to determine the angles of orientation of the station.

display module 10 for displaying the status of the station;

a hydroacoustic communication channel module (not shown in the drawing) designed to interface the station equipment with an external hydroacoustic module and control it;

an external hydroacoustic module (not shown in the drawing), consisting of a hydroacoustic antenna, a housing, a hydroacoustic modem board, and a cable for connection to the hermetic connector 4 of the station.

The body 1 also has an eye 11 and a vacuum port 12.

The utility model is used as follows. Bottom stations are used to perform research using multicomponent seismic technology, provide seismic data acquisition in accordance with the requirements of the geological task. They are mainly used to search for deep hydrocarbons, to monitor developed fields.

In the process of performing seismic exploration, pre-charged and programmed stations are placed using a halyard or underwater robotic vehicles on the bottom of the studied water areas in positions with the required coordinates. With the help of specialized sources of seismic signals, located on the source vessels, signals are excited at the design points above the spaced stations. The excited signal undergoes refraction and reflection from various geological boundaries.

An important feature of modern work is the high requirements for the positioning of bottom stations on the bottom, which regulate both the accuracy of setting stations and the invariance of their position throughout the entire time of seismic survey.

The body 1 of the bottom station provides tightness and strength at operating depths up to 1000 m and has a coating that provides corrosion resistance in sea water.

The shape and weight and size characteristics of the body and bandage, the shape and dimensions of their external elements provide:

acceptable from the point of view of the quality of the seismic material, the influence of interference when the station is at the bottom in the conditions of the flow of surrounding water;

the optimal (from the point of view of the seismic signal transmission coefficient) value of pressure exerted by the bottom station on the ground when it is on the bottom.

To exclude distortions of the orientation data collected by the compass-inclinometer, which is part of the bottom station, the housing 1 and the shroud 2 are made of non-magnetic materials.

The surfaces of the shroud 2, which are in contact with the bottom when the station is under water, are provided with protruding elements (lugs 6) that prevent the bottom station from being carried away by currents. The same protruding elements of the bandage ensure that the stations are fixed relative to each other when stacked on the deck of ships and during transportation.

Bandage elements protect the equipment protruding beyond the station body (hydrophone sensor, pressurized connector) from impacts.

The design of the hull and bandage of the station, the layout of the equipment inside the hull provide the convenience of carrying the station with one hand (in the presence of imposed standard sections of the halyard attached to the hull of the bottom station).

Thus, the presence of the bandage 2 increases the strength and rigidity of the housing 1, which ensures better safety of the equipment installed inside the housing, in particular, during various manipulations with the station during its movements. The use of the elements of the bandage 2 as lugs ensures the stability of the position of the station when it works at the bottom. The same lugs provide mutual fixation of the stations during their stacking and transportation, and can also be used for the convenience of carrying them manually.

The reliability of protection of the hardware and software complex of the station increases the accuracy of the data obtained during reconnaissance.

Claims (2)

1. An autonomous bottom seismic station containing a sealed housing in which a hardware and software complex is located for carrying out research using multicomponent seismic exploration technology, characterized in that the housing is equipped with a bandage made in the form of parts connected to each other and to the housing, located outside the housing with the possibility of protecting the hull and the elements of the equipment protruding from the hull from impacts during their installation on the bottom and when lifting onto the ship, while the bandage is connected to the hull by means of an eyelet and is equipped with protruding elements made in the form of lugs that are in contact with the supporting surface when the station is on the day. 2. The station according to claim. 1, characterized in that the lugs are located with the possibility of fixing the stations when they are stacked on the deck of the vessel and during transportation.

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