Specially adapted for water-covered areas and and (G01V1/38)
G01V1/38 Specially adapted for water-covered areas (g01v0001280000 takes precedence);;(336)
FIELD: radio engineering, communication.SUBSTANCE: claimed automatic device for deploying and wrapping bottomed antennas under water and under the ice cover, in which a body shape of the underwater device is proposed. It is in the form of a vertical disk that provides placement of coils with a long seismic streamer long and vertical stabilization of the underwater device. The device combines the functions of the power cable of the underwater device and the seismic streamers, which are coiled, where the coils are an element of the body of the underwater device. Also, systems of engines, propellers, valves, sensors, cable layer and electronics unit, providing automatic or controlled motion of the underwater device rounding the bottom profile at a given distance from it and deploying-wrapping of a seismic streamer to the seafloor in the underwater position. If there is an ice cover, the underwater device with a self-deploying seismic streamer can be submerged into water from the board of a carrying icebreaker into the ice hole it formed, after automatic or controlled deployment of the seismic streamer to the seafloor with subsequent registration and recording of seismic signals occurs. After registration and recording is complete, the seismic streamer is automatically wrapped and the device is lifted onto the board.EFFECT: ability for automatic deployment and wrapping of a long-bottomed antenna for seismic survey and seismo-acoustic monitoring of offshore hydrocarbon fields regardless of climatic conditions and ice conditions, and also effective obtaining of seismic survey data and seismo-acoustic monitoring in real-time.2 cl, 1 dwg
FIELD: physics.SUBSTANCE: method for detecting hydrocarbons is described. The method includes obtaining seismic data associated with the water mass in the exploration area. The filter is then applied to a portion of the seismic data to amplify the diffraction anomaly signals with respect to horizontal or near horizontal signals associated with the water mass to form filtered seismic data. After filtration, the seepage sites are identified by the filtered seismic data.EFFECT: high accuracy and reliability of the obtained data.21 cl, 7 dwg
FIELD: transportation.SUBSTANCE: invention application describes the mechanisms and methods by which freely movable remotely operated vehicles (ROVs) can reliably capture and take on board easily controlled seismic sensors (cargo) while they are in the process of moving, using a underwater ship in the water depth. The ROV cargo can be replenished without the need to return the ROV to the underwater ship for additional cargo and without the need for heavy lifting and recovery equipment. Also, a reverse process for returning cargo from ROV to the underwater ship vessel is disclosed.EFFECT: installation, control and removal of cargo from unstable environment are performed more efficiently and reliably.16 cl, 26 dwg
FIELD: radio engineering, communication.SUBSTANCE: invention relates to the creation of flexible extended trailed antennas (FETA) setup and selection devices (SSD) on the submarines and surface ships. The proposed SSD FETA contains the hoist, on the drum of which the part of FETA is wound, the cable laying device, the tubular storage for placing of another FETA part and its terminal stabiliser, as well as the device for creating the excess hydraulic pressure. The hoist and cable laying device are enclosed in the sealed casing, made in the form of the detachable shell made of waterproof material, stretched over the openwork frame and hermetically connected to the tubular storage initial section. The device for creating the excess hydraulic pressure is hermetically connected to the shell from waterproof material.EFFECT: proposed design of setup and selection devices provides the safe setup and selection of flexible extended trailed antennas, the access for the maintenance and repair of flexible extended trailed antennas setup and selection devices and allows you to allocate the setup and selection devices mechanisms most effectively.2 cl, 1 dwg
FIELD: physics.SUBSTANCE: method for predicting a seismic event comprising selecting at least one controlled parameter among a number of parameters characterising the processes in the earth's crust to monitor a situation in at least one zone of an expected seismic event belonging to the seismically active region under study; forming in the seismically active region under study, to which at least one zone of the expected seismic event belongs, an observation network of n measurement points of at least one controlled parameter, in which, in the formation of a spatio-temporal distribution pattern of consistency measures of S changes of controlled parameters, the consistency measure is determined by synchronization criterion, equal to ratio of standard deviation of differences between consecutive measurements for each cellular mesh point to average measurement value in all cellular mesh points.EFFECT: increased reliability of seismic researches.1 cl
FIELD: physics, navigation.SUBSTANCE: invention refers to geophysics and can be used in seismic surveys in ice-covered waters by initial planning of the survey route, crossing the studied area. The initial route is planned based of the initial ice conditions in the studied area, which has ice-covered waters. After the system is prepared, the seismic system is deployed in the water using a research vessel in the studied area. This is typically performed in an area which is relatively free of ice. At least one accompanying vessel shall follow behind the research vessel when it passes the survey route and receives the seismic data. The research vessel tows the seismic system beneath the surface of ice-covered waters to avoid ice. At the same time, the system and operators observe the actual ice conditions in the studied area along the route.EFFECT: invention improves the accuracy of the obtained data and the efficiency of seismic activities due to the fact that the accompanying vessel can monitor the actual ice conditions along the route of research, allowing non-interrupted movement of the research vessel.21 cl, 23 dwg
FIELD: radio engineering, communication.SUBSTANCE: receiver includes two orthogonally oriented circular sensing elements, provided with variable-diameter nozzles mounted orthogonally one after the other on the axis of the cylindrical body from the sound-reflecting material. Coaxially sensitive elements on the longitudinal axis of the body have two orthogonally oriented accelerometers. Sensitive elements and their corresponding accelerometers through amplifiers are connected to a subtracting device for measuring the pressure gradient. When measuring the pressure gradient, the gain factors are pre-tuned.EFFECT: increasing the noise immunity and reliability of pressure gradient measurement.4 cl, 2 dwg
FIELD: mining.SUBSTANCE: surveying device comprises at least one exploratory cable (110, 111) each having a proximal end attached to the main vessel (100) and a distal end connected to at least one underwater towing vessel (130, 131), as well as at least one surveying device (120, 121) connected to the exploratory cable (110, 111) between its proximal and distal ends. During surveying, the survey cable (110, 111) extends in a direction perpendicular to the longitudinal axis (101) of the main vessel (100) a distance (E) sideways from the main vessel (100), for example under an ice cover such as hard ice or debris Ice.EFFECT: increasing the expressiveness, informative and cost-effectiveness of exploration in the polar region, since the main ship only needs to break through a narrow channel in order to explore a large area, thus saving energy, time and money.13 cl, 8 dwg
FIELD: physics.SUBSTANCE: studying the map of the anomalous magnetic field of the Earth in the investigated area, obtained from the results of the previously performed high-precision magnetic survey in a prospective for the discovery of placers of minerals in the water area. In the area of the "living" ripe, a seismoacoustic monitoring station is set up to record micro-earthquakes and a daily change in acoustic emission. Determining the periods of activation and calm of the fault zone, as well as the period of activity of the wave zone. During the lull (after the activation period), a repeated high-precision magnetic survey is performed on the profile that suppresses the magnetic field anomalies on the old map, or they perform a repeated survey on the whole explored perspective area. Calculate the differences in the magnetic field (between old and repeated surveys) obtained before and after activation, allocate local anomalies on them. By the magnitude of the difference anomalies, it is judged about the presence of placers containing magnetic minerals. Samples are taken at the center of each anomaly and analyzed for the presence of a useful component. On the contours of significant anomalies in which, based on the results of the analysis of samples, the presence of anomalous contents of useful components is confirmed, the boundaries of the deposit are determined.EFFECT: reduction of sampling volumes, reduction of field work time.
FIELD: physics.SUBSTANCE: method for recording seismic signals to search for and explore hydrocarbons in the structures of underwater geological arrays, according to which seismic waves are recorded, including responses in water from the PS- and SS-waves reflected from inhomogeneities in the underwater geological arrays and generated by the seismic wave source, by means of receivers located in the water layer, and analyzing the temporal recordings of the signals is performed, by the results of which the investigated underwater geological arrays are judged. Herewith the receivers are positioned near the water surface and are removed from the source by a minimum predetermined distance, which makes it possible to record the responses in water from the PS- and SS-waves, which is determined by full-wave numerical modeling based on the known bottom relief data and/or thickness of the water layer, and/or the investigated underwater geological array.EFFECT: reducing the labour intensity, technical and technological complexity of work with simultaneous increasing the informative nature of seismic studies.3 cl, 4 dwg, 1 tbl
FIELD: physics.SUBSTANCE: in the implementation of the present method, the submarine vessel moves fore forward, and the mobile seismic streamers previously placed along its sides unfold in the working arrangement along the ship's hull. Besides, in addition to the bottom of the submarine vessel stationary seismic streamers are placed and a seismic braid is used, many times the length of the underwater vessel and placed behind its stern.EFFECT: increase the effectiveness of reconnaissance by providing a larger receiving area.3 cl, 4 dwg
FIELD: physics.SUBSTANCE: device for seismic exploration is equipped with a towed capsule. The capsule consists of the right and left sides, in which seismic braids are placed on special mechanisms. Also, respectively in the bow and stern, folding bow and stern rotary consoles are located on the sides. On the consoles in turn, there are guides of seismic braids and mechanisms that fix braids on the guides during deployment. For the capsule, additional seismic streamers can be deployed, which are placed on the winches installed in the right and left sides of the towed capsule. Boards are equipped with bow thrusters, providing the possibility of maneuvering.EFFECT: simplified operation and increased operational safety.5 cl, 8 dwg
FIELD: physics.SUBSTANCE: underwater observatory, coupled to a control room (9), includes a surface buoy (8), a subsurface buoy (3) and a lower buoyancy (4) connected via a rope (2). The running cable (2) is fixed to the ballast (5) by means of a hydroacoustic disconnector (6). Between the subsurface buoy (3) and the ballast (5), the profiling medium (1) moves along the running line (2). The profiling medium (1) contains a central microcontroller module, an electric drive and a set of measuring sensors. The surface buoy-sign (8) contains a radio antenna (16), a radio modem (17), accumulators (18), an accelerometer (19), a magnetic compass (20), electricity consumption counters (21), a GPS receiver (22), GSM-Modem (23), solar panels (24). The lower buoyancy (4) comprises an electric drive (10) articulated with a telescopic device (11) at the extremity of which a seismometer (12) is installed, as well as a modem (13) of a hydroacoustic communication channel with a dispatch station (9) and a device (15) with a flash drive integrated data logger seismometer (12). The lower buoyancy (4) is ball-shaped and comprises an elevator chamber (14) for moving the profiling carrier (1). Inside the running cable (2) there is a hydrosensor cable (7).EFFECT: expanding the functionality.2 dwg
FIELD: physics.SUBSTANCE: methods, devices and systems for the processing of the seismic data are disclosed. In some embodiments, a set of measurements of the vectorial value and a set of the corresponding measurements of the seismic wavefield scalar quantity can be obtained at the seismic receiver. The angle of the seismic wavefield incidence at the first time point may be determined by calculating the vector of the seismic wavefield incidence at the seismic receiver at the first time point. The incidence vector is derived based on the correlation measure of, at least, one measurement of the vectorial magnitude. The component of the vectorial measurements can be adjusted depending on the particular incidence angle of the seismic wavefront at the first time point, and the adjusted component can be combined with the scalar value measurement that corresponds to the first time point.EFFECT: high accuracy of the obtained data.25 cl, 7 dwg
FIELD: data processing.SUBSTANCE: invention relates to geophysics and can be useful in complex seismic data interpretation and electrical survey during search for offshore hydrocarbon deposits. Proposed method uses each time obtained results as zero approximation. At that, seismic survey plays main role in contour mappings, and electrical prospecting is in use of hydrocarbon deposit presence direct indicators. Seismic survey should be preferred in contour and horizon-oriented mappings, and hydrocarbons presence direct indicators are in electrical survey results. This requirement is included into disclosed method. Invention can be most efficiently used when searching for offshore hydrocarbon deposits during joint search by seismic survey and electric survey on same areas and/or profiles.EFFECT: higher accuracy of obtained data by using relationship between two methods, expressed in addition of one method results with other, and obtaining not conflicting each other results.1 cl
FIELD: geophysics.SUBSTANCE: invention relates to geophysics and can be used to investigate underground space under water using seismic exploration by reflected waves. System for investigation of underground space under water using seismic exploration by reflected waves includes multiple sound sources 1 to generate acoustic waves in water, controller 2 for controlling phases of acoustic waves, seismic receiver 3 for receiving reflected acoustic waves; and research ship 4, equipped with sound sources 1. Controller 2 controls phases of sound sources 1, so that acoustic waves generated by corresponding sound sources 1, have phase difference on surface B of bottom of water body. Generation of transverse waves for propagation in soil is controlled.EFFECT: technical result is increased accuracy of obtained data by enabling control of generation of transverse waves.8 cl, 20 dwg
FIELD: shipbuilding.SUBSTANCE: invention relates to the production of underwater operations to probe the seabed, pipeline routes with geo-referenced detection silted objects. Towed underwater vehicle (TUV) is designed as a hollow cylindrical body with a removable head and the tail stabilizer, equipped with a device deepens and computationally-control module and connected to the ship-towing cable-rope. Sonar equipment includes a parametric profiler, consisting of an antenna radiating parametric pumping and receiving antenna, means of processing and recording of sonar signals. TUV further comprises an active sonar, n number of uninhabited small self-propelled platforms located aft of the TUV and equipped with a propulsion system, automatic traffic control system, ballast-equalization system, chassis, magnetometric flaw, an identifier of explosives, poisonous and radioactive substances, a small-sized underwater television apparatus. The vessel is equipped with a towing-control system pits small-sized self-propelled platform.EFFECT: invention provides the detection of underwater objects by providing access to hard to reach items, surveyed underwater objects and enhanced functionality.
FIELD: physics.SUBSTANCE: compact autonomous seismic-acoustic station (CASAS) containing the equipment carrier (AC) mounted on the seabed and popping-up after the ballast recoil, is declared. The equipment carrier AC contains an on-board computing unit (BCU), power supply, a triaxial geophone placed in the sealed spherical container and a hydrophone, a device of setting and taking the AC from the ground, a search tool for the floated AC made in the form of the flashing beacon, of the satellite navigation system "Glonass" of the low-orbit satellite communication system "Gonets", and an active radar reflector, a breaker duplicated by the commands from the urgency device installed outside the sealed container with the tightness sensors, the pressure sensor registering the path consisting of the four-filtration and gain unit providing filtering of the signals from the triaxial geophone and the hydrophone outputs in the frequency band of 5-200 Hz, and the amplification of signals for their application to the input unit of the four-channel analog-to-digital converter (FADC), the output signals from which are served separately on the input channels of the generator (CG), where an array of the separate samples with a length of the sixteen-bit words, supplied from the output of the CG to the respective channels of the information storage (IS), which is a solid-state memory of the four flash cards with a capacity of 2 GB each, is formed from the hydrophone and seismic sensors . The FADC unit consists of four 14-bit ADCs. The device of setting and taking the AC from the ground is made in the form of n pontoons placed in tiers, forming a truncated pyramid and equipped with the cylinders of the compressed gas and the respective inlet and outlet valves. The search tool for the floated AC, made in the form of the flashing beacon, of the satellite navigation system "Glonass" of the low-orbit satellite communication systems "Gonets" and the active radar reflector, are placed in the navigation buoy connected with the CASAS cable-coupling, in which the cable is made in the form of the hydrosensor cable.EFFECT: provision of the more reliable area studies.
FIELD: geophysics.SUBSTANCE: invention relates to geophysics and can be used for marine seismic survey. Method and device for obtaining sea seismic data to create images or determine characteristics of underground formations are connected by signal sources. While using multiple simultaneously switched signal sources, time, required for seismic exploration, is reduced as result of increase of ship speed, towing signal sources (reduction of density of readings of data or increasing production of interval counts). After separation of signals, obtained using simultaneous activation of signal sources, and combination of separate sets of data seismic data is obtained at design or more high density of recording of readings.EFFECT: technical result is higher accuracy of obtained data.19 cl, 10 dwg
FIELD: geology.SUBSTANCE: invention relates to geology and can be used when searching for hydrocarbon accumulations. Disclosed is method of detecting hydrocarbons using underwater vehicle, equipped with one or more measuring components. Method includes navigation of underwater vehicle in water area; monitoring of water body with measuring components, connected with underwater vehicle to collect measurement data. At that, measuring components comprise mass spectrometer and fluorometer to determine chemical components concentrations by mass-spectrometer and fluorometer. Collected data from underwater vehicle is used to determine, presence of hydrocarbons, and their location.EFFECT: high accuracy of obtained data.30 cl, 5 dwg
FIELD: geography.SUBSTANCE: invention can be used in three-dimensional high-resolution seismic explorations of the sea bed for engineering survey. Concept: system of 3D examination of sea bed for engineering survey comprises at least one seismic irradiator and at least one seismic cable, sound velocity sensor, multi-beam echo sounder, side-scanning sonar, high-frequency and low-frequency parametric profilographs, multi-beam echo sounder, whose outputs are connected by common bus with data collection unit, one of the outputs of which is connected by common bus with inputs of seismic irradiator and seismic cable, sound velocity sensor, multi-beam echo sounder, side-scanning sonar, high-frequency and low-frequency parametric profilographs, and the other output of data control and analysis is connected to data primary processing unit, connected to data visualisation unit connected with unit of obtained data construction in 3D format. Method of 3D examination of sea bed for engineering survey includes collection of information about sea bed topography and upper layers of bottom sediments, collection of data about structure of deep layers of bottom sediments, collection of data about propagation speed of seismoacoustic signals using sound speed sensors in water and multichannel seismoacoustic profiling, further primary processing of said data and analysis of seismoacoustic signal data in real and near-real time, combination of obtained data on time and coordinates, that is followed by secondary data processing using computer tools equipped with means for three-dimensional imaging and simulation, results of processed data is used to construct 3D model of high relief of sea bed, top and deep layers of bottom sediments, based on analysis of which seismic and geotechnical properties of bottom sediments with extraction of abnormal areas is performed.EFFECT: technical result: upgraded reliability of results of sea bed analysis due to increased depth and resolution at complex engineering surveys.12 cl, 2 dwg
FIELD: geophysics.SUBSTANCE: invention relates to geophysics and can be used for marine seismic survey. Proposed is an automated positioning device (APD), which is a body of neutral buoyancy, the housing of which represents two tightly coupled cavities interconnected in such a way, that a system of through channels is formed between them, via which water is pumped between end nozzles and nozzles equipped with special shutters located near screws of low-noise hydraulic propulsions creating a variable thrust, the force and the direction of which are controlled by the propulsions screw direction and the shutters degree of opening-closing. APD is also equipped with a hydrophone for registration of own noise and noise of the incident water flow, an electronic accelerometer and an electronic gyroscope, detail acoustic distance meters for determining the distance between APD installed on adjacent seismoacoustic towed streamers. In the proposed method proposed is a control over the seismoacoustic towed streamers using such APD. Seismoacoustic towed streamers are released from special bottom wells in the vessel stern. Coordinate referencing is performed by the automated method from a research vessel. Target distance between adjacent towed streamers, as well as between sensitive elements in each antenna is set in accordance with previously calculated coordinate grid. Performed is automatic control over the depth of the towed streamers immersion, as well as control over the position of the towed seismoacoustic streamers in the crosswise and the lengthwise directions without interruption of the working cycle of surveys and retrieving the towed streamers onboard the vessel.EFFECT: technical result is higher accuracy of the survey data.2 cl, 3 dwg
FIELD: measurement technology.SUBSTANCE: disclosed is method for assessing of inter nodes distance between transmitter (A) and receiver (B) units belonging to network, including plurality of nodes located along towed acoustic linear antennae (20a-20e), wherein acoustic signal is transmitted from transmitter unit to receiver unit through underwater acoustic channel.EFFECT: method involves stage of estimating distance between nodes as function of assessing underwater acoustic channel speed of sound profile, wherein said sound speed profile depends on device immersion depth.13 cl, 11 dwg
FIELD: acoustics.SUBSTANCE: proposed is a method of controlling acoustic characteristics of a network of acoustic nodes located along towed acoustic linear antennae, herewith acoustic nodes networks are set to determine cross-node distances enabling determination of the acoustic linear antennae location. Method involves the following stages: receiving (91) a specified diagram of the acoustic nodes network location; obtaining (92) at least one property of the marine environment relating to survey using the acoustic nodes network; and determining number (94) of acoustic characteristics of the acoustic nodes network using the model of sound propagation of at least one property of the marine environment and the specified diagram of location.EFFECT: proposed are a method and a device to control acoustic characteristics of a network of acoustic nodes located along towed acoustic linear antennae.15 cl, 12 dwg
FIELD: geophysics.SUBSTANCE: invention relates to geophysics and can be used to specify the structure of a deposit of hydrocarbons in water areas and increase the efficiency of its development. Proposed is a method for seismic monitoring of the process of development of a hydrocarbons deposits in water areas including three-dimensional seismic survey and building on its data a model of the reservoir, predicting orientation of subvertical cracks systems and designing arrangement of operational and injection wells, as well as arrangement at the bottom of the water area over the deposit of stationary seismic streamers, recording seismic traces with elastic vibrations from artificial sources and monitoring the process of development of the hydrocarbons deposit by dynamic and kinematic changes in the detected vibrations when processing the seismic traces. Before drilling of the projected horizontal section of the well arranged is a mobile seismic streamers liner on the bottom following a radial different-azimuth observation system on the object of survey with a center located above the horizontal section of the well. During drilling microseismic vibrations are recorded excited by the bit at the bottom hole, when processing which by dynamic and kinematic characteristics determined are anisotropic properties of the medium in the zone of drilling, specified is orientation of subvertical cracks systems and corrected are three-dimensional models of the reservoir. After completion of the well drilling the liner of seismic streamers is dismantled and moved to a new object of analysis. Herewith during the hydraulic fracturing microseismic vibrations are recorded, determined are three-dimensional coordinates of their sources and also refined is the three-dimensional model of the reservoir and orientation of the cracks systems.EFFECT: technical result is the increase of efficiency of hydrocarbons development in water areas at drilling horizontal wells.1 cl
FIELD: seismology.SUBSTANCE: invention relates to seismology and can be used for geophysical survey of sea water areas. Seismic data collection system contains multiple seismic buoys, intended for receiving and recording seismic signals while being in water, first vessel with a source of seismic signals excitement intended for support of multiple seismic buoys and lowering of them on water on the heading of ship movement, seismic cable, towed by the first vessel, and the second vessel intended for lifting seismic buoys from water upon completion of seismic signals recording program by them. At least one seismic buoy comprises the first housing with at least by one first seismic sensor accommodated inside, a float, fixed on the first case, and the second housing suspended to the first housing on the cable of given length, with at least one the second seismic sensor accommodated inside.EFFECT: expansion of apparatus for collecting and recording seismic data.10 cl, 2 dwg
FIELD: ship building.SUBSTANCE: invention relates to ship building, particularly, to surface scientific and research vessels. Scientific and research icebreaking vessel for 3D seismic technology regardless of ice conditions, which has a housing in which there is seismic equipment and a shaft for discharge and laying on the bottom of the bottom seismic cable. For motion of the source of acoustic waves is used self-propelled autonomous unmanned underwater vehicle (EIA), located on the ship, trip of which is implemented via separate vertical shaft by means of lowering-lifting device. Upon that PPA is equipped with a reading device of seismic data recorder, radio modems, hydroacoustic modems and satellite communication system, in bottom part of the PPA is also a radiator, while the PPA is made in the form of unmanned tv-controlled underwater vehicle with manipulator devices for connection of bottom cables to ropes exhaust winches.EFFECT: technical result is in improvement of efficiency of seismic survey.1 cl
FIELD: data processing.
SUBSTANCE: invention relates to geophysics and can be used to search for hydrocarbon deposits in a sea area. Method includes performance of remote seismic investigations of a search site to identify the target site. Then the underwater device (UD) is deployed in the water mass and directed to the target site. In the water mass at the target site measurement data is collected with the help of the underwater device; the data is then analysed to determine whether hydrocarbons are present on the target site.
EFFECT: higher accuracy and reliability of survey results.
12 cl, 5 dwg
FIELD: machine building.
SUBSTANCE: invention relates to an underwater floating device (1), which comprises insert (4) comprising a thermoplastic material and hollow tube (7), foam (5) of a thermoplastic material, at least partly covering insert (4), outer skin (6) comprising a thermoplastic material, which is formed by injection under pressure on foam and is in contact with water during use.
EFFECT: technical result consists in improvement of operational characteristics of an underwater floating device.
14 cl, 6 dwg
SUBSTANCE: invention relates to seismic survey and are intended to determine structure and properties of geologic section under bottom of water bodies. Method for marine seismic survey includes excitation of vibrations by a source and recording of reflected waves with multichannel receiving device mounted with inclination relative to water surface, displacing along profile oscillation source and a multichannel receiving device by means of ship, data processing. Multichannel receiving device is made in form of a seismic cable consisting of a set of receivers of pressure in form of hydrophones with pitch between them from beginning of seismic cable to its end. Excitation of vibrations is carried out with three sources operating simultaneously or in a given order: pneumatic source in form of an air gun, sparker and boomer. Airgun excites low-frequency oscillations in range of 50-250 Hz, towed at a depth of not more than 0.25 of predominant length of excited oscillations, at distance of 10-20 m from first channel of seismic cable. Sparker excites medium-frequency vibrations in range 200-2,000 Hz and is located between air gun and boomer. Boomer excites high-frequency oscillations in range of 500-5,000 Hz, towed at a depth of not more than 0.25 of predominant length of excited oscillations, on possible minimum distance from first channel of seismic cable. Received seismic oblique data are transmitted on a recording device on vessel for mathematical processing. Device for marine seismic survey includes vessel-pusher, a seismic station, multichannel receiver made in form of a seismic cable in housing, and a system of three series-arranged sources for exciting elastic vibrations in different frequency ranges: pneumatic source in form of an airgun, sparker and boomer.
EFFECT: technical result is increase of resolution of seismic survey on water bodies.
2 cl, 1 dwg
FIELD: geophysics.SUBSTANCE: invention relates to geophysics and can be used in seismic surveys. Describing is method for seismic prospecting. Method uses plurality of groups of vibrators for seismic exploration using low-frequency and high-frequency vibrators in each group of vibrators. Multiple groups of vibrators continuously send low-frequency sweep signals by means of low-frequency vibrators. During sending of low-frequency sweep signals vibrators emit high-frequency signals in staggered order between groups of vibrators to increase range of seismic survey.EFFECT: technical result is improved accuracy of obtained data.26 cl, 11 dwg
FIELD: ocean engineering.SUBSTANCE: invention relates to ocean engineering and can be used for continuous prolonged wide-band monitoring of the environment near the sea bottom. Self-contained underwater system for environmental monitoring contains a multifunctional underwater station equipped with onboard measuring means. Self-contained modular underwater vehicle can move along the assigned route and can be connected to an external measurement module. Loading area of the underwater station is configured to receive the said vehicle. Interface system is configured to communicate with the vehicle. To control functions of the underwater station, the self-contained underwater system comprises a control system.EFFECT: there is achieved a possibility to conduct different types of environmental research.27 cl, 8 dwg
FIELD: physics.SUBSTANCE: disclosed is method of producing distance from unit surface (D1) between support surface (33) and first unit (30) belonging to network and containing plurality of nodes located along towed linear acoustic antennae, and in which plurality of acoustic sequences transmitted between nodes, each sequence is used to evaluate cross distance as function of duration of propagation of sequence between nodes.EFFECT: after radiation by first unit (30) of this signal: first unit measures first duration of propagation of first reflected seismic wave as result of first reflection support surface of this signal, and first value of distance from unit surface is obtained as function of said first duration distribution; and/or second unit (31, 32) measures second length of propagation of second reflected seismic wave as result of second reflection of said signal from support surface, and second value of distance from unit surface is obtained as function of second duration distribution.13 cl, 6 dwg
FIELD: shipbuilding; data processing.SUBSTANCE: invention relates to geophysics and can be used in seismic survey of underwater oil and gas deposits in Arctic seas. Disclosed is a ship with structure combining advantages of a surface ship and advantages of a multipurpose underwater station in part using hydroacoustic radiators and towed in water under ice seismic cables for 3D seismic technology. Outlet of towed seismic cables and hydroacoustic radiators is performed by means of sliding structures fitted in vertical shafts in ship bottom outside zone of action of ice. For receiving seismic waves reflected from ground side linear receiving antennae are mounted on retractable structures. Navigation bases with a common centre are formed from receivers by positioning them in a plane parallel to plane of ship deck. Axis of one base is directed along axial line of ship, and axis of other base is directed along traverse to right. Seismic cables are made from hydrosensor cable.EFFECT: high reliability of seismic survey in icy conditions, reducing negative effect of seismic survey on environment and sea environment.1 cl
FIELD: oceanology.SUBSTANCE: invention relates to oceanology, in particular, seismology and hydrobiology, and can be used for rapid evaluation of high geophysical activity in sea water areas, leading to earthquakes. For this purpose, from water area to be investigated initial plankton samples are collected containing hydrobionts-bioindicators. From initial samples resultant sample is obtained by selection of hydrobionts-bioindicators of Chaetognath type and visual analysis of their outer morphological features is carried out. In presence in at least of one zooid chaetognaths disorders of muscular tissue, eyes and integrity of body, presence of high geophysical activity in investigated offshore zone is judged. Most efficient sampling is by vertical total fishing from bottom to surface or by horizontal bottom fishing. Effective is visual examination of outer morphological features, which characterise state of muscular tissue, eyes and integrity of body of analysed chaetognaths individuals by observation with naked eye or using magnifying glass or microscope. At that, visual examination of said outer morphological features can be performed both in living chaetognaths individuals, and in individuals fixed by 4 % formalin.EFFECT: invention enables rapid visual assessment of presence or absence of high geophysical activity in marine environment at any time irrespective of season due to use of pseudobenthos hydrobionts as bioindicators widespread at sea.9 cl, 2 ex
FIELD: oil and gas industry.SUBSTANCE: invention relates to seismic prospecting of oil and gas deposits and can be used in research in transition (transit) zones. Disclosed method involves well drilling and immersion into well of seismic excitation pneumatic source controller arranged inside screw drill rod. Pneumatic source in prepared well is supplied by means of presser rod with maximum pressure force on rod of up to 3,000 kgf (controlled). At that, pneumatic source is directly fixed on presser rod. Also disclosed is device containing amphibious vehicle, drilling screw installation and pneumatic source. Drilling screw-type unit represents single structure with unit of presser pneumatic source arranged on carriage on moving base.EFFECT: broader functional capabilities in operation and maintenance of device, as well as speed, quality and ecological safety of seismic investigations in zones, previously not available for any seismic exploration.2 cl, 2 dwg
FIELD: physics.SUBSTANCE: operation of the disclosed device is based on using repulsive forces arising in an impulse force exciting source placed in a sealed housing and moving in the investigated medium in the form of pressure pulses, while exciting elastic vibrations in the required direction in said medium. The value of the pressure pulses and the direction of propagation of the elastic vibrations is provided due to that the corresponding shape of the sealed housing enables to use the surrounding water medium as a supporting surface which generates resistance to the movement of the sealed housing towards the surface of the water medium. The apparatus comprises a floating means, a sealed housing in which an actuating pulse source is placed and a windlass. The sealed housing is made of two parts, capable of relative movement along the vertical axis in opposite sides, and the upper surface of the housing has a much larger area than the lower surface.EFFECT: high quality of the obtained information.2 dwg
FIELD: mining.SUBSTANCE: in the towed device for measurement of acoustic characteristics of sea ground containing the on-board processing module installed on the vessel, which is connected with the ship processing module by means of a conducting rope, the floating surface module and the underwater module suspended to it on a conducting rope fitted with acoustic sensors, and the floating surface module is fitted with the receiver of the positioning satellite system, the floating surface module is designed as two float-operated catamaran-type platforms, each is fitted with the information storage and transmission unit with the satellite system receiver, the underwater module with acoustic sensors is designed as two flexible underwater cable antennas with spaced pressure receivers, fixed on the respective float-operated platforms, while the device is fitted with the towed radiator of acoustic impulses, and outputs of flexible underwater cable antennas are connected to the respective inputs of information storage and transmission units, the outputs of which through the respective conducting ropes are connected to the on-board processing module.EFFECT: possibility of determination of parameters of sea ground on the basis of its seismoacoustic sonic test on the studied water area.2 dwg
FIELD: physics; geophysics.SUBSTANCE: invention relates to systems for hydro- and geo-acoustic survey. The system includes surface equipment (1), as well as bottom-mounted switch (3) and multi-linear cable antennae with pressure sensors (5). The surface equipment (1) is connected to the switch (3) by an underwater main cable (4). All multi-linear cable antennae are connected to the switch (3) and their opposite ends are provided with anchor fixing elements (6). The anchor fixing elements (6) are connected to buoys (7) by buoy lines. Each buoy (7) is in the form of a container with drainage holes and a cover. Inside buoy (7) container there is a halyard storage in the form of a floating coil with a centre hole. A release passes through said centre hole, said release being fixed by lock rings on the side of the cover and the side of the lower part of the container. A buoy line connected to an anchor fixing element (6) passes through the lower lock ring and the release is electrically and tightly connected to the cable antenna.EFFECT: broader functional capabilities, high reliability and enabling repeated deployment of the system with a long monitoring period.3 dwg
FIELD: radio engineering, communication.SUBSTANCE: hydroacoustic system for imaging underwater space, having antenna units for the portside and the starboard, the outputs of which are connected to corresponding series-connected receiving amplifiers and analogue-to-digital converters, and the inputs are connected to the outputs of the power amplifiers, a roll measuring device, a module for generating, receiving and packing signals, the inputs of which are connected to the analogue-to-digital converters, the power amplifiers and the roll measuring device, an interface unit, a navigation system and an on-board computer, wherein the input of the on-board computer is connected to the output of the navigation system and through the interface unit to the output of the module for generating, receiving and packing signals, a multi-beam echo sounder antenna, series-connected receiving amplifier unit and analogue-to-digital converter unit, connected between the output of the multi-beam echo sounder antenna and the module for generating, receiving and packing signals, a power amplifier unit connected between the input of the multi-beam echo sounder antenna and the output of the module for generating, receiving and packing signals, as well as a depth measuring device connected to the input of said unit; the system is provided with forward-looking sector-scanning sonar, which includes a receiving-transmitting antenna, a power amplifier, the input of which is connected to the unit for generating, receiving and packing signals, and the output is connected to the radiator of the receiving-transmitting antenna, multichannel amplifiers connected in series to the receiving elements of the receiving-transmitting antenna and a multichannel analogue-to-digital converter, the output of which is connected to the unit for generating, receiving and packing signals, and a sound and light signalling device, connected to the output of the computer. The invention provides high reliability of the hydroacoustic system owing to early detection of navigation hazards on the towing course of the underwater module of the hydroacoustic system and preventing collision with said hazards.EFFECT: providing early detection of navigation hazards and preventing collision with said hazards owing to a larger scanning sector on the heading of the underwater module of the system.2 dwg
FIELD: physics.SUBSTANCE: apparatus comprises a unit of three mutually perpendicular seismic detectors with a 0.01-20 Hz bandwidth, a digital seismic signal detector in the 0.033-50 Hz range, a hydrophone, a pressure meter, a power supply, a ballast, a ballast release configured for control via a hydroacoustic communication channel from a vessel. The housing of the apparatus is made of metal. The unit of three mutually perpendicular seismic detectors is mounted on a self-propelled platform and is mounted in a recess made in one of the ends of the ballast. The said unit is mounted at the bottom by a mechanical arm. The mechanical arm is interfaced with a ramp, which seals the recess in the ballast.EFFECT: high reliability of obtained information.
FIELD: physics.SUBSTANCE: bottom station is in the form of a bottom-mounted, deep-water float-free geophysical equipment carrier connected to an on-board computer module installed on a vessel. The geophysical equipment carrier includes, arranged in a sealed spherical container consisting of two hemispheres, a recording unit, an orientation determining unit, a synchronisation unit, a hydroacoustic transceiver unit, a release control device, a power supply unit, geophones, a geophone filter unit and an information timing device. The recording unit includes a three-component seismic detector module and a measurement information storage device. The orientation determining unit is in the form of tilt and azimuth sensors and is mounted in a gimbal suspension. A hydrophone, a hydroacoustic antenna, a ballast-anchor and a flash beacon are mounted outside the sealed container. The on-board computer module comprises a digital information recording unit with a measurement information storage device, a control unit, a unit for hydroacoustic communication with the geophysical equipment carrier, a time synchronisation device and a display device. The gimbal suspension is based on bearings with a non-linear friction coefficient. The tilt and azimuth sensors further comprise two gradient meters mounted on an indirectly horizontally stabilised platform. The said platform is also fitted with roll angle sensors, trim angle sensors, angle of attack and skew sensors, linear acceleration and angular velocity sensors, and a computer configured for combined processing of all sensors. The indirectly horizontally stabilised platform is provided with three gimbal frames, which are fitted with three servo-powered torque motors, two three-component accelerometers with a mechanism for displacement relative to each other and a device for measuring linear velocity of the three-component accelerometers. The device further includes the second indirectly horizontally stabilised platform, which is fitted with three servo-powered torque motors, four accelerometers with a vertical sensitivity axis and a mechanism for displacement thereof, a device for measuring the linear velocity of the accelerometers relative to the bottom station, and a device for recording the time at which two accelerometers meet on the beam of the first and second pairs. All the devices are operably linked through the control unit to the computer, which calculates the desired values of the components of the deviation of the lead line in the meridian and in the first vertical, the velocity, the direction of movement, the latitude, the angle of drift, the path radius and the distance on the vertical from gravity meters to the geoid surface.EFFECT: high reliability of the obtained information owing to high noise-immunity of the bottom station.
FIELD: physics; geophysics.SUBSTANCE: invention relates to geophysics and can be used in seismic survey of regions covered in ice. A skeg is mounted from the stern of a towing vessel and extends below the waterline. A channel in the skeg protects cables for steamers and a source of a seismic system deployed from the vessel. Tow points on the skeg lie below the water surface and connect to tow lines to support the steamers and source. A floatation device supports the source and tows below the water surface to avoid ice floes. The streamers can have vehicles deployed thereon for controlling the position of the streamer. To facilitate location of the streamers, these vehicles on the streamers can be brought to the surface when clear of ice floes so that global positioning system readings can be obtained and communicated to a control system. After obtaining readings, the vehicles can be floated back under the surface.EFFECT: high quality of survey data.49 cl, 68 dwg
FIELD: physics.SUBSTANCE: sensitive elements composed by round transducers are arranged orthogonally one after another at the cylindrical case axis made of sound reflecting material and communicated with its surfaces via the hollow channels. Cross-section of the latter smoothly varies from round nearby sensitive element to rectangular nearby the case surface without decrease in cross-section area. Axes of said channels in appropriate sensitive elements are directed toward each other to make channels outlets be located in perpendicular planes relative to the case axis and to the point thereat located between the centres of both sensitive elements.EFFECT: better protection against flowover noise, hence, decreased direction finding errors.3 cl, 2 dwg
FIELD: physics.SUBSTANCE: to detect activation of regional deformation processes, particularly caused by imminent strong earthquakes, a system is used to detect geoacoustic emissions in the frequency range of 0.1 Hz to 10-20 kHz, which includes a piezoceramic hydrophone mounted at the bottom of natural and manmade water bodies. A high-frequency geoacoustic precursor, which precedes an earthquake by several days to several hours is a signal anomaly in the frequency subbands: 600-2000 Hz, 2000-6500 Hz, higher than 6500 Hz; which exceeds average daily values by not less than four times with duration of not less than 15 minutes.EFFECT: high accuracy of prediction.1 dwg
FIELD: physics; geophysics.SUBSTANCE: invention relates to marine geophysical survey and can be used for offshore mineral exploration in the Arctic region. According to the present disclosure, the sea bottom is irradiated with a sonar radiator or a system of radiators which generate sound emission (1) directed towards the bottom, mounted on a non-autonomous underwater vehicle which is released by a bearer cable from a shaft in the bottom of a carrier ship (4), or mounted on a collapsible girder (9) which can be pulled out of the shaft in the bottom of the carrier ship. The base of the shaft is protected from possible contact with ice fragments pulled under the ship by a special housing structure - bypass (8). Reception and recording of reflected radiation is carried out using seismoacoustic cables (5), released from the bottom or the stern of the ship below the lower boundary of the ice cover using a telescopic tubular channel (6), having an electric drive and which enables to adjust the depth of immersion of the cable. The horizontal and vertical orientation of the receiving cable in the water is controlled by non-autonomous underwater vehicles (7). The received signals are processed using correlation techniques.EFFECT: high quality and accuracy of obtained data on the structure of bottom layers.6 cl, 7 dwg
FIELD: physics.SUBSTANCE: in seismic survey in icy water, streamers are towed behind a vessel under the water surface to avoid collision with ice. GPS readings may not be consistently obtained because the ice prevents a tail buoy with a GPS receiver from trailing from the streamer on the surface Instead, a device is towed on the streamer under the water surface. The absolute position of the streamer is tracked by intermittently bringing the towed device towards the surface so that GPS readings can be obtained. The absolute position of the streamer can then be used in conjunction with compass readings and can correlate various seismic sensor signals obtained along the streamer during the survey. The compass readings can be corrected for declination using declinometer readings, which can be compensated for iron effects from the vessel or other device carrying the declinometer.EFFECT: high accuracy of survey data.31 cl, 33 dwg
FIELD: physics; geophysics.SUBSTANCE: invention relates to geophysics and can be used in seismic exploration to detect oil and gas deposits. The invention discloses a method and an apparatus for marine seismic survey using one or more movable marine seismic vibrators. The sweeping function for the vibrator is based on the criterion of allowable degradation and is a nonlinear function which performs frequency sweeping from top downwards. The obtained data can be used directly without cleaning or can be easily cleaned.EFFECT: high accuracy of survey data.21 cl, 11 dwg
FIELD: physics, geophysics.SUBSTANCE: invention relates to geophysics and can be used for sea seismic works. Claimed are seismic streamer and related method of evaluation of the shape of seismic streamer controlled in transverse direction. This seismic streamer is divided into several adjacent sections of seismic streamer by control devices in transverse direction. Heading transducers arranged fore and aft of every section generate the data on heading. Every section is simulated as a rectangular fore and curved fore section. Section shape is evaluated in compliance with this model from the data on heading towards the section.EFFECT: higher precision of trial data owing to precision of seismic streamer shape evaluation.19 cl, 2 dwg
FIELD: physics.SUBSTANCE: disclosed is a small-size bottom seismic module, connected by a hydroacoustic link to a control station and consisting of a sealed housing, a hydrophysical module, a device for detecting geophysical signals, which includes a bottom seismometer, information storage means, a spatial orientation sensor, a radio buoy, a ballast, a ballast release, a release timer, a flash beacon, a radio beacon, an external communication socket and a power supply. The sealed housing has the shape of a hemisphere which is linked to the base of the sealed housing which is in the form of a plate, on the upper diameter of which there are mechanical elements of the ballast release, which are in the form of straps which are linked to the ballast, tightly adjoining the base of the sealed housing on its lower diameter. The means of communicating with the control station are in the form of a single-relay hydroacoustic link. The spatial orientation sensor consists of an electronic 3D compass, three accelerometers and three angular velocity measuring devices, rigidly linked to the bottom seismometer, and the bottom seismometer is in the form of a wideband molecular-electronic sensor.EFFECT: high reliability of detected seismic signals.3 dwg