CN86102257A - Distributed marine seismic source control system and method - Google Patents
Distributed marine seismic source control system and method Download PDFInfo
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- CN86102257A CN86102257A CN198686102257A CN86102257A CN86102257A CN 86102257 A CN86102257 A CN 86102257A CN 198686102257 A CN198686102257 A CN 198686102257A CN 86102257 A CN86102257 A CN 86102257A CN 86102257 A CN86102257 A CN 86102257A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/003—Seismic data acquisition in general, e.g. survey design
- G01V1/006—Seismic data acquisition in general, e.g. survey design generating single signals by using more than one generator, e.g. beam steering or focusing arrays
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/02—Generating seismic energy
- G01V1/04—Details
- G01V1/06—Ignition devices
- G01V1/08—Ignition devices involving time-delay devices
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Abstract
The offshore shooting system and method uses many oceanic earthquakes source, source control component and transmission line.In each source control component, utilization is placed on the data that near the sensor in each source or the source records in the subcomposition-source, the generation source adjustment amount duration of ignition and source trigger pip, and this source trigger pip offered in the subcomposition-source selected source, make it trigger igniting.Subcomposition-source drags in the survey vessel back by the umbilical cable that contains reinforcing member and air supply pipe, can connect many affiliated umbilical cords on the main umbilical, and every affiliated umbilical cord is a subcomposition-source in tow.Position for the control subcomposition-source departs from backward is preferably in the main umbilical end and adorns a paravane.
Description
The present invention relates to control and monitor the method and the instrument of one group of oceanic earthquake source (hereinafter referred to as one " source array "), specifically, the present invention relates to by transmit the method and the instrument of digital source control signal to the transmission communication circuit that places near the electronic unit of the water oceanic earthquake source array from hull.Electronic unit produces the source trigger pip and passes to each selected in this source array seismic origin.Be placed in each source of source array or near the data that sensor produced the source send electronic unit to and handle, be converted to digital form, be transferred to hull again.
In seabed and other regional under water traditional exploration engineering, the one or more in tow seismic origins that can in water, produce acoustic energy of ship.Usually use air cannon as the seismic origin, though also have the commercially available suitable oceanic earthquake source of many other types, such as hydraulic giant or telescopic explosive release.The shock wave that is produced by air cannon passes water and seabed, enters in the geologic structure under water.Each geologic structure reflects the part energy of each shock wave, and they are dragged the sound receptacle (being called " hydrophone ") on the strip object of ship back to experience.The signal by hydrophone produced is descended in record aboard ship.Analyzing recorded data then provides about the structure of this geologic structure and the information of preserving in those structure PetroChina Company Limited..
The implication of used herein term " water " comprises water marshy, mud and contain any other fluid that enough moisture content can be implemented the present invention.
The air cannon of as many as more than 50 can be arranged in the source array in tow of seismic vessel back.A typical source array can have 4 to 12 air cannons.These air cannons fill with pressurized air, generally put once fire every several seconds.In order to improve the quality of the shock wave that is produced by such air cannon, the air cannon in each source array can have different air chambers, its size by 40 cubic inches to more than 400 cubic inches.To the selected air chamber size of each source array, by the rock type in the geologic structure and desired penetration depth and resolution decision.
For electronic control signal and pressurized air are provided to air cannon, a kind of technology commonly used is to link each air cannon with an independent air duct and an independent cable from survey vessel.For example, the United States Patent (USP) U.S.4 of this base of chairamine (Chelminski), 038,630(1977 July 26) disclose by dragging air cannon source array getting off and independent air duct by tying into a bundle and independent control electric wire on the survey vessel to air cannon supply air and electronic control signal.Because a source array generally comprises at least four air cannons, and may comprise the air cannon more than 12 or 12, so it is generally very heavy, very inconvenient to lead to this a bundle air duct and the electric wire of this source array.For at the air cannon source array with drag between the survey vessel of this source array firm mechanical connection is provided, this base of chairamine proposes to re-use an independent tow outside this bundle air duct and electric wire.It is extremely inconvenient using a tow and a bundle air duct and electric wire simultaneously.
Another kind of common technology is with the flexible pipe of a large diameter conveying air pressurized air to be transported to a multiple-limb pipeline on the source array from the expansion box on the seismic vessel, flows to each air cannon in the source array by little distributed pipeline again.The control electric wire of each air cannon, the cable of strengthening mechanical connection between towboat and the air cannon source array in tow and the flexible pipe of this conveying air tie together, and form a umbilical cable (also being referred to as " umbilical cord " herein) that connects this source array and this survey vessel.Fig. 1 is the cross-sectional view of a common this umbilical cable, and the cross section of being got is perpendicular to the longitudinal axis of umbilical cord.The umbilical cord 1 of Fig. 1 comprises the flexible pipe 3 of carrying air, 16 wires identical with plain conductor 5, the steel skeleton of wrapping with the parts 6,7,8 of strengthening tensile strength 2, and the protection big envelope 9,10 and 11 of electrical isolation.Steel skeleton 2 encases air supply pipe 12.Shape common umbilical cord is as shown in Figure 1 handled inconvenient, and also is difficult to link to each other with terminal device owing to containing many independent electric wires.
Generally speaking, place near the water surface in some way in oceanic earthquake source (or Several combination source).Usually, these source arrays by long chain or similarly equipment be suspended on generally be garden shape, pyriform or the buoy of garden cylindricality on.For example, the United States Patent (USP) U.S.3 of gill this (Giles), 491,848(1970 January 27) disclose by a ship one first cable in tow, many floating members have been placed along this cable, while is one second cable in tow, has placed the oceanic earthquake source of same number along this cable.Each seismic origin is suspended on below the corresponding floating member with an independent rope.
Usually, an oceanic earthquake source (or source array) is placed on the position of a certain distance backward of the side that departs from the towboat air route, used method is to drag a suitable paravane (can select) by this ship from marketing, and hangs one or more seismic origins (the perhaps one or more seismic origins of Orly behind this paravane) below this paravane.For example, the United States Patent (USP) U.S.4 of Yi Telia (Itria) etc., 087,780(1978 May 2) discloses a seismic vessel back with a tow strap steerable paravane in tow, and below this paravane, hung one or more air cannons.
United States Patent (USP) U.S.3,491,848(draws the front) disclose and another kind ofly placed the technology in oceanic earthquake source at the side that departs from the towboat air route, wherein paravane drags a end at cable by a canoe, is placing showy parts along this cable.This canoe is with another cable oceanic earthquake source in tow, and each source is suspended on below the buoy with an independent rope.United States Patent (USP) U.S.3,491, disclosed technology is expensive and inconvenient in 848, it will use several cables, particularly it will use one or more along its cable of placing the thick heaviness in oceanic earthquake source, and the such cable of each bar has comprised one or more again and has been used for the electric wire of each seismic origin separately.
System of the present invention is an offshore shooting system that comprises one or more sub-portfolio seismic origins, each subcomposition-source comprises one or more oceanic earthquake sources that are suitable for being placed near the waters of survey vessel again, a source control component that is suitable for being placed near the waters of each subcomposition-source, and the transmission line that can from the ship to the source control component, transmit digitized source array structure and igniting time signal.In this source control component, the data that near the sensor side that utilization is contained in each source or the source is the gets time of carrying out is adjusted.The source trigger pip that produces in this assembly is sent to the source of certain appointment.In a preferred embodiment, this transmission line has an independent signal transmission component (such as a concentric cable, a pair of multiple twin plain conductor, or light transmitting fiber) to each subcomposition-source.This signal transmission component can be placed on (it constitutes the part of the umbilical cable that connects the local air supply pipe on hull and each source) in total air supply pipe.In another embodiment, this transmission line comprises radio telemetry interface a pair of microwave or ultrahigh frequency.For other parts these transmission interfaces and system couple together, in two embodiment, all provide a suitable data bus.
Can hold one or more sub-portfolio seismic origins by a main umbilical cable peculiar to vessel.Each subcomposition-source preferably is contained in one and is connected on the affiliated umbilical cord cable on the main umbilical cable by rotary type T shape connector.In order to control the position that subcomposition-source departs from hull backward, be preferably in main umbilical and adorn a paravane away from that end of ship.
In working order down, the triggering of system is synchronous with the igniting of each seismic origin of the source array of selecting, and provides the digitizing input to analyze by each source of this source array.Provide source array structure and the duration of ignition information digitized signal pass to each source control component from hull.The information that obtains from sensor (such as the source ignition timing sensor near the hydrophone the selected source that is placed on subcomposition-source and the selected source that is placed on subcomposition-source) is sent to the assembly that links to each other, carry out digitizing there, be used for calculating the adjustment amount of the duration of ignition then, perhaps be sent to hull and get on.In each source control component, need the time to adjust, guarantee each source simultaneous ignition with the data of utilizing in each source or near the sensor the source receives.Produce the source trigger pip then and send the selected source of continuous subcomposition-source to.
Fig. 1 is the cross-sectional view of a traditional umbilical cable, and the cross section of being got is perpendicular to the longitudinal axis of cable.
Fig. 2 is the simplification top view of the preferred embodiment of offshore shooting of the present invention system.
Fig. 3 is the cross-sectional view of a preferred embodiment of digitizing umbilical cable of the present invention, the cross section of getting perpendicular to the longitudinal axis of cable.
Fig. 4 is the part skeleton view of another embodiment of system of the present invention, it comprises an air cannon, a umbilical cord that contains air supply pipe, a signal transmission component, a reinforcing member that ties together, a source control component that is connected between signal transmission component and the air cannon, a local stiffening spare and the local air supply pipe that air cannon and umbilical cord are connected together.
Fig. 5 is the skeleton view of the rotary type T shape connector that uses in the preferred embodiment of the present invention, and how expression uses rotary type T shape connector to connect umbilical cable shown in Figure 3.
Fig. 6 is when rotary type T shape connector shown in Figure 5 only has a umbilical cable, the skeleton view of this connector, and expression can allow air flow through the mode of this rotary type T shape connector.
Fig. 7 is an explanation source control component of the present invention and at the block scheme of the mode of its duration of work signal inflow and outflow assembly.
A preferred embodiment with reference to figure 2 explanations system of the present invention.Offshore shooting system shown in Figure 2 comprises ship 21, and it is strip object 27 and be grouped into one of the sub-portfolio seismic origin 33,35,37,39 focus in combination in tow.Strip object 27 comprises many hydrophones (not drawing).In the sub-portfolio seismic origin 33,35,37,39 each contains one or more oceanic earthquakes source 59(again, and it can be air cannon or other oceanic earthquake source commonly used).Though contain three seismic origins in each subcomposition-source shown in Figure 2, should think the seismic origin that can contain any number in each subcomposition-source.Subcomposition-source 33 links to each other with ship 21 by main umbilical 23, connector 49, affiliated umbilical cord 41.Similarly, subcomposition-source 35 links to each other with ship 21 by main umbilical 23, connector 51, affiliated umbilical cord 43, and subcomposition-source 37 links to each other with ship 21 by main umbilical 25, connector 53, affiliated umbilical cord 45; Subcomposition-source 39 links to each other with ship 21 by main umbilical 25, connector 55, affiliated umbilical cord 47.
In the umbilical cord 23,25,41,43,45,47 each all contains an air supply pipe and a reinforcing member.Connector 49,51,53,55 all allows air to flow to affiliated umbilical cord from main umbilical.Ship 21 has a compressed air source (do not draw come), by it by umbilical cord to each subcomposition-source air feed.
In the subcomposition- source 33,35,37,39 each all contains the floating element 61 of a common pattern that is used for supporting the corresponding seismic origin and is used for making these sources in the subcomposition-source to remain on the locational any accessory hardware (not drawing among Fig. 2) that leaves selected distance near the water surface mutually.The most handy rope or similar thing (not drawing among Fig. 2) are suspended on the seismic origin and accessory hardware on the floating element 61.
Each subcomposition-source contains a source control component 57.Each source control component 57 contains the circuit that receives and store the digital signal that transmits from hull, generation makes each seismic origin in the subcomposition-source trigger the circuit of the source trigger pip of igniting, reception is by in the source of subcomposition-source or near the measured signal of the sensor the source, these record signal digitalized, and give transmission line to send the circuit of hull back to.This structure of source control component and working method will be done more detailed discussion with reference to figure 7 afterwards.
In a preferred embodiment (discussing) below with reference to Fig. 3, in the umbilical cord 23,25,41,43,45,47 each all contains one or more signal transmission components, be used for transmitting digital signal between ship and the selected source control component (such as from the data that are placed near the sensor the subcomposition-source, perhaps from the source array architecture signals of hull), by adopting the signal multiplex techniques and making the number of signal transmission component in the every umbilical cord reduce to minimum, reduce the size and the cost of every umbilical cord.Preferably provide an independent signal transmission component to each subcomposition-source.
In another preferred embodiment, (also will be discussed in more detail afterwards), between ship and source control component, pass on digital signal such as microwave line or the such transmission line of ultrahigh frequency radio system by one.
It can be use always the sort of at an end of main umbilical 23 paravane 29(to be housed), the position of departing from backward of the subcomposition- source 33,35 that links to each other with main umbilical 23 with control.Can see that part of between paravane 29 and connector 49 of main umbilical needn't contain air supply pipe.Thereby the air supply pipe of main umbilical 23 only needs to extend to connector 49 from hull.That part of between paravane 29 and connector 49 of main umbilical only need comprise a reinforcement feature, and is used for providing any signal transmission component of control signal to paravane.Similarly, it can be use always the sort of at an end of main umbilical 25 paravane 31(to be housed), the position that the subcomposition-source 37,39 that links to each other with main umbilical 25 with control departs from backward.Be appreciated that greater or less than two subcomposition-source and can be connected in the main umbilical 23,25 any by an affiliated umbilical cord and corresponding connector.The paravane that is positioned at main umbilical one end makes us can control each and is connected in the position that the subcomposition-source on this main umbilical departs from backward with (between main umbilical and the affiliated umbilical cord) connector, in the preferred embodiment that will discuss with reference to figure 4, Fig. 5, do not relatively move between them below.
Fig. 3 be suitable as Fig. 2 system main umbilical or the cross-sectional view of the preferred embodiment of a kind of umbilical cord of affiliated umbilical cord, its reference number is 100.Umbilical cord 100 contains a liner 102(who surrounds cavity 101, and it can be made with nylon).Air can flow by cavity 101.Thereby, hereinafter sometimes cavity 101 and liner 102 are called " air supply pipe " altogether.The outside of liner 102 is surrounded by one deck reinforcement material 104(, and it can be made with the KEVLAR fiber that E.I.Dupont De Nemours and Company makes).It can be made with tygon to be surrounded by crust 106(in reinforcement material 104 outsides).Be surrounded by one deck back-up coat 108 in crust 106 outsides to increase tensile strength.Back-up coat 108 preferably is made up of two-layer or two-layer above metal armouring as shown in Figure 3, but, also can use any have sufficient intensity and sizeable other member.Wrap the outer jointing jacket 110 that one deck is preferably made by urethane again in back-up coat 108 outsides.In cavity 101, putting elongated signal transmission component 112.Signal transmission component comprises a centre drift 116 and outer concentric conductor 114.As a kind of modification embodiment illustrated in fig. 3, being placed on what be used as signal transmission component in the cavity 101 is a pair of multiple twin plain conductor or a light transmitting fiber.
In another preferred embodiment, basic identical as those umbilical cords and the umbilical cord 100 of main umbilical in the system of the present invention and affiliated umbilical cord, just in its air supply pipe, do not place signal transmission component.In this preferred embodiment, by send and receive microwave or radiowave, transmission signals between ship and source control component by a pair of suitable telemetry interface (illustrating) below with reference to Fig. 7.
In yet another embodiment, the main umbilical of system and affiliated umbilical cord have form shown in Figure 4.Umbilical cord 150 shown in Figure 4 comprises air supply pipe 151, signal transmission component 152, reinforcing member 154, and preferably use securing member or similarly thing (not drawing among Fig. 4) make these three elements parallel to each other basically and near becoming a bundle.Signal transmission component 152 can be a concentric cable (as shown in Figure 4), a fiber optic cable, or a pair of multiple twin plain conductor, and this could have been bought on market by them and select.Be reinforcing member 154(as shown in Figure 4 with a cable wire) suit.
Local stiffening spare 164 couples together air cannon 162 and reinforcing member 154.By connector 156 be connected on local air supply pipe 158 on the air supply pipe 151 from air supply pipe 151 to air cannon 162 air feed.
Be appreciated that and be connected on a plurality of air cannons or other seismic origin on air supply pipe 151 and the reinforcing member 154 with similar method, constitute a subcomposition-source.By being similar to 160 local signal transfer element, can link to each other a plurality of air cannons (or other seismic origin) with source control component 200.Should also be understood that hope hangs source array with buoy, subcomposition-source is positioned near near the water surface.
Can optionally connect a plurality of subcomposition-sources on air supply pipe 151 and the reinforcing member 154.In this case, also tie the signal transmission component that the signal transmission component 152 that is similar to each subcomposition-source is arranged on the reinforcing member 154, it links to each other with the source control component that belongs to each subcomposition-source.
Use in the preferred embodiment of the sort of umbilical cord shown in Figure 3 in the present invention, each seismic origin in the subcomposition-source by a local air supply pipe and a local stiffening spare (it can be similar to those the local stiffening spares shown in Fig. 4) with drag umbilical cord accordingly and link to each other.Preferably each local stiffening spare all is fixed by bolts to or ties up on a framework, again this frame hanging on a floating object or buoy.Can link to each other with the air supply pipe of corresponding umbilical cord each local air supply pipe is direct, perhaps link to each other with a multiple-limb pipeline earlier, again this multiple-limb pipeline is linked to each other with corresponding umbilical cord.Under latter event, multiple-limb pipeline (it can be selected from the multiple-limb pipeline of traditional design) from umbilical cord to local air supply pipe distribute compressed air.
In the preferred embodiment of using umbilical cord shown in Figure 3, the same with the embodiment shown in Fig. 4, an independent source control component of each subcomposition-source links to each other with the signal transmission component of corresponding umbilical cord, in the preferred embodiment of using data transmission link (signal transmission component that replacement links to each other with umbilical cord), each source control component is by data transmission link and hull communication, and by the local signal transfer element of each seismic origin and each seismic origin communication in the subcomposition-source.
State in the use among the embodiment of any umbilical cord, can or nestle up it in strip object 27 and place a subcomposition-source.In such embodiments, the umbilical cord that the source control component of subcomposition-source is linked to each other with ship is placed within the strip object, perhaps is fixed by bolts to this strip object next door.By subcomposition-source being laid to such an extent that nestle up first group of hydrophone in the strip object, make between corresponding that group hydrophone and the subcomposition-source and guarantee zero offset relation all the time.If use the sort of umbilical cord shown in Figure 3, its air supply pipe and signal transmission component preferably are added on the tow rope of strip (" inlead ") so, and from an end of strip object above-mentioned subcomposition-source are inserted the strip object.
In the modification of the sort of Fig. 2 embodiment that uses umbilical cord shown in Figure 3, preferably use Fig. 5 and rotary type T shape connector 170 shown in Figure 6, each affiliated umbilical cord is connected on the corresponding main umbilical.Fig. 5 and Fig. 6 are two skeleton views of rotary type T shape connector 170.In Fig. 5, affiliated umbilical cord 171 is connected with main umbilical 172 by rotary type T shape connector 170.Rotary type T shape connector 170 comprises that two V shape elements 173, air chamber 174, pipeline 175 and 176(only draw in Fig. 6).In the pipeline 175 and 176 each all with air chamber 174 securely mutually conllinear is connected, and in them each links to each other rotationally with element 173, so that air chamber 174 can be with respect to the common axis rotation of element 173 around pipeline 175,176.In element 173, air chamber 174 and the pipeline 175,176 each all has a centre gangway.These passages are connected to each other, and make gas to flow to umbilical cord 171 from umbilical cord 172 by this passage.The centre gangway 177 of air chamber 174 has drawn among Fig. 6.
This simple designs of umbilical cord shown in Figure 3 makes us can be not only fast but also any two such umbilical cords are coupled together with rotary type T shape connector 170 with economizing.Adopt rotary type T shape connector, make us can use various subcomposition-source structures.In the air supply pipe of main umbilical, place for each subcomposition-source among the embodiment of an independent signal transmission component, the centre gangway that the signal transmission component of a given subcomposition-source can easily pass rotary type T shape connector enters continuous affiliated umbilical cord.
The structure and the working method of source control component of the present invention are described with reference to figure 7.Source control component 57 be suitable for being placed on contain the seismic origin 59 sub-portfolio oceanic earthquake source near the waters in.The mode that other source in this subcomposition-source links to each other with source control component is the same with the seismic origin 59.It can be a hydrophone for sensor 212(, and the depth transducer of the degree of depth of a measure neighbor seismic origin, perhaps monitoring offers the baroceptor of pressure of the air in source 59) be placed near the water the source 59.It is common near local air supply pipe (not drawing among Fig. 7) air feed shut-off valve 214(to be housed, and is a solenoid valve), it is contained on the source 59, and according to the air mass flow of controlling from the electric control signal of assembly 57 by local air supply pipe.Computer system 190 and telemetry interface 192 on ship 21, have been disposed.
The computer system 190 that is contained on the ship 21 produces the source control signal, and it comprises the information such as the duration of ignition in each source in all structures of source array as requested and the source array, and the technical requirement that the operator proposes is reacted.Then, these source control signals are sent to certain selected source control component.In addition, computer system 190 produces synchronizing clock signals and they is sent to source control component, and it also needs to obtain digitalized data from each assembly.The digitalized data of receiving from assembly is stored in the computer system 190.Perhaps send to an independent seismologic record unit (not drawing) by computer system 190.Computer system 190 (on the cathode ray pipe unit or as printing, the showing) time-domain and frequency-domain with seismic origin signal sum total that not only show each of preferably having the ability, and show the evolution record of each seismic origin.
Self-test unit 210 preferably includes a voltage sensor of measuring this component internal power supply (not drawing) voltage, a pressure transducer of measuring this component internal pressure, and a pulse signal generator that is used for the intraware diagnosis.
When work, receive and offer microprocessor 202 from the source control signal of the computer system on the ship 21 190 by telemetry interface 194, this source control signal contains relevant for desired source array structure and the information of the duration of ignition of given emission (the once specific igniting of a focus fully in the source array of selecting especially represented in term " emission ") once.Also by all other the source control component of computer system 190 to microprocessor 202(and this system) clock signal is provided, so that the subcomposition-source that links to each other with each microprocessor is with all other subcomposition-source simultaneous ignitions.Also provide digital signal to microprocessor 202 from sensor (such as sensor 212 and be placed on sensor in the seismic origin 59) from the output terminal of A/D converter 206.
Between twice emitting, microprocessor 202 is determined corresponding time adjustment amount to the source (mode of generation is that the institute that these source trigger pips are triggered in this subcomposition-source of igniting simultaneously is active) that each need produce the source trigger pip.From sensor 212(and the sensor that similarly links to each other with other source) the data about true pressure near the water each seismic origin in the subcomposition-source, in microprocessor, carry out relevant treatment, calculate the time adjustment amount in each source with the current data (measured) that offers each seismic origin ignition circuit by a proper sensors that is placed in the seismic origin.
From the sensor that links to each other with this assembly receive the data of coming filtered, amplify, store, and send computer system 190 to by transmission line.Such data preferably include the information about the subcomposition-source state, such as source time sensor signal internally, the hydrophone signal of nearby sphere (from the hydrophone of the seismic origin that is close to subcomposition-source), (it is online with main frame to indicate this assembly for wiring state information, or off line, still standby), the adjustment amount duration of ignition that in microprocessor, produces, effective duration of ignition in each source, the information of or undesirable spontaneous ignition malfunctioning about the igniting in source, the state of air feed shut-off valve, and the state of internal electron check.
The said structure of source control component 57 makes each source in each subcomposition-source use the computer system 190 on the ship the same with use microprocessor 202, and same control sensitivity is arranged.This control ability guarantees that side direction has coherent source signal along earthquake line.Undesirable side direction changes and may be changed by the geology state of the underground structure that is interpreted as mistakenly being investigated in the source signal.
Be to be understood that each embodiment as described herein only is used to notion of the present invention is described, and should be used as limitation of the present invention to these embodiment.Method and apparatus described herein can not depart under the spirit of the present invention, carries out various changes in appended claim scope.
Claims (1)
1, one is used to investigate the seafari system in zone under water, comprising:
A ship;
At least one oceanic earthquake source;
One has one first end and one second end, and comprises first umbilical cord of one first air supply pipe;
Local signal transfer element that each seismic origin is used and local air supply pipe.Local signal transfer element that each is such and local air supply pipe all have one first end and one second end, first end of each said local signal transfer element and local air supply pipe connects together with the corresponding seismic origin, and second end of all local air supply pipes links to each other with first umbilical cord, and its connected mode allows gas to flow to this part air supply pipe from this first umbilical cord;
One is suitable for being placed in the water, and first source control component that links to each other with second end of local signal transfer element, this first source control component can produce a source control signal for each source, and this source trigger pip in any selected source is sent to corresponding local signal transfer element; And
First transmission line that can between the ship and first source control component, transmit digital signal.
2, the system of claim 1 also comprises:
One by ship in tow, contains the strip object of many hydrophones, and wherein said first umbilical cord is installed like this, make to have at least an oceanic earthquake source and first source control component to be positioned near at least one hydrophone.
3, one is used to investigate the seafari system in zone under water, comprising:
A ship;
One group of oceanic earthquake source forming by at least one oceanic earthquake source;
One has one first end and one second end, and comprises first umbilical cord of one first air supply pipe;
Local signal transfer element that each seismic origin is used and local air supply pipe, local signal transfer element that each is such and local air supply pipe all have one first end and one second end, first end of each said local signal transfer element and local air supply pipe links to each other with the corresponding seismic origin, and second end of all local air supply pipes links to each other with first umbilical cord, and its connected mode allows gas to flow to this part air supply pipe from first umbilical cord;
One is suitable for being placed in the water, and first source control component that links to each other with second end of local signal transfer element, this first source control component can produce a source trigger pip for each source, and this source trigger pip in any selected source is passed to corresponding local signal transfer element;
A first rotary type T shape connector that links to each other with first umbilical cord;
One has one first end and one second end, and comprises second umbilical cord of one second air supply pipe, and first end of this second umbilical cord links to each other with this first rotary type T shape connector; And
First transmission line that can between the ship and first source control component, transmit digital signal.
4, the system of claim 3 also comprises:
A second rotary type T shape connector that links to each other with first umbilical cord;
One has one first end and one second end, and comprises the 3rd umbilical cord of one the 3rd air supply pipe, and first end of the 3rd umbilical cord links to each other with the second rotary type T shape connector;
Be suitable for being placed on second group of seismic origin that the seismic origin in the water is formed by at least one; And
Local signal transfer element that each seismic origin is used in second group and local air supply pipe, each said local signal transfer element and local air supply pipe have one first end and one second end, first end of each said local signal transfer element and local air supply pipe links to each other with the different seismic origin in second group, and second end of all local air supply pipes that link to each other with second group of source links to each other with the 3rd umbilical cord, and its connected mode allows air to flow to this part air supply pipe from the 3rd umbilical cord.
5, claim 1 or 3 system also comprise a paravane that links to each other with first end of first umbilical cord.
6, the system of claim 5, wherein first transmission line can also transmit the paravane control signal to this paravane from hull, and this paravane is suitable for by this paravane control signal control.
7, claim 1 or 3 system also comprise:
A near sensor that is positioned at certain seismic origin; And
An energy sends the signal of this sensor generation to the signal transmission component of source control component.
8, oceanic earthquake source array comprises:
At least one oceanic earthquake source;
One has one first end and one second end, and comprises the first digital umbilical cord of one first air supply pipe and one first signal transmission component;
Local signal transfer element that each seismic origin is used and local air supply pipe, each said local signal transfer element and local air supply pipe have one first end and one second end, first end of each said local signal transfer element links to each other with the corresponding seismic origin, and second end of all local air supply pipes links to each other with first air supply pipe;
One first source control component, be connected to second end of this first signal transmission component and this local signal transfer element, the control signal that provides according to first signal transmission component, for each source produces a source trigger pip, and give corresponding local signal transfer element this source trigger pip in any selected source.
9, the source array of claim 8 also comprises:
Article one, the strip cable that comprises many hydrophones, the wherein said first digital umbilical cord is installed like this, makes to have at least a seismic origin and first source control component to be positioned near at least one hydrophone.
10, the source array of claim 8, wherein first signal transmission component is placed on first air supply pipe the inside.
11, oceanic earthquake source array comprises:
At least one oceanic earthquake source;
One has one first end and one second end, and comprises the first digital umbilical cord of one first air supply pipe and one first signal transmission component;
One is contained in the first of this first digital umbilical cord and the first rotary type T shape connector between the second portion, it have one first main channel and one can with first local channel of the first main channel replacement fluids, the said first rotary type T shape connector links to each other with this first digital umbilical cord, so that supply with fluid by this first main channel, and allow this first signal transmission component through this first rotary type T shape connector, extend to the second portion of this first digital umbilical cord from the first of this first digital umbilical cord;
One has one first end and one second end, and the second digital umbilical cord that contains one second air supply pipe and a secondary signal transfer element, first end of the said second digital umbilical cord links to each other with the said first rotary type T shape connector, so that supply with fluid by said first local channel, and allow this secondary signal transfer element to extend out from this second digital umbilical cord, link to each other with first signal transmission component through the said first rotary type T shape connector;
The local signal transfer element that each seismic origin is used and be suitable for the local air supply pipe that gas stream is crossed, each said local signal transfer element and local air supply pipe have one first end and one second end, first end of each said local signal transfer element and local air supply pipe links to each other with the corresponding seismic origin, and second end of all local signal transmission components links to each other with the said second digital umbilical cord, and its connected mode allows gas to flow to each local air supply pipe from the second digital umbilical cord; And
First source control component that is connected between secondary signal transfer element and the local signal transmission component, according to the control signal of receiving from the secondary signal transfer element, for each source produces a source trigger pip, and this source trigger pip in any selected source is sent to corresponding local signal transfer element.
12, the source array of claim 11 also comprises:
One is contained in the third part of this first digital umbilical cord and the second rotary type T shape connector between the 4th part, the said second rotary type T shape connector have one second main channel and one can with second local channel of the second main channel exchanging gas, the said second rotary type T shape connector links to each other with this first digital umbilical cord, so that supply with fluid by this second main channel, and allow this first signal transmission component through the second rotary type T shape connector, extend to the 4th part of this first digital umbilical cord from the third part of the first digital umbilical cord;
One has one first end and one second end, and the 3rd digital umbilical cord that comprises one the 3rd air supply pipe and one the 3rd signal transmission component, first end of said the 3rd digital umbilical cord links to each other with the said second rotary type T shape connector, so that supply with fluid by said second local channel, and allow the 3rd signal transmission component through the said second rotary type T shape connector, extend out from the 3rd digital umbilical cord, link to each other with first signal transmission component;
Second group of oceanic earthquake source forming by at least one oceanic earthquake source;
The local signal transfer element that each seismic origin is used in second group and be suitable for the local air supply pipe that gas stream is crossed, each said local signal transfer element and local air supply pipe have one first end and word two ends, first end of each said local signal transfer element and local air supply pipe links to each other with the corresponding seismic origin, and second end of all local air supply pipes (its first end links to each other with the seismic origin in second group) links to each other with the 3rd digital umbilical cord, and its connected mode allows gas to flow to said local air supply pipe from the 3rd digital umbilical cord;
One second source control component according to the control signal that the 3rd signal transmission component provides, is that each source in second group produces a source trigger pip, and this source trigger pip in any selected source in second group is sent to corresponding local signal transfer element.
13, the source array of claim 11, wherein first signal transmission component is placed on first air supply pipe the inside.
14, claim 8 or 11 source array also comprise a paravane that links to each other with first end of the first digital umbilical cord.
15, claim 8 or 11 oceanic earthquake source array also comprise:
A near sensor that is contained in a certain seismic origin; And
A signal transmission component can send the signal that this sensor receives to link to each other with said that source source control component.
16, the source array of claim 14, wherein this first signal transmission component links to each other with this paravane, so that can send the paravane control signal to this paravane by this first signal transmission component.
17, the offshore shooting method in an a kind of ship of use and many oceanic earthquakes source comprises the steps:
Carry a digitized source control signal to give to be placed near the oceanic earthquake source a source control component from hull;
According to this source control signal, be that each source in the selected group produces a source trigger pip in this source control component; And
Make selected oceanic earthquake source trigger igniting according to this source trigger pip.
18, the method for claim 17 also comprises the steps:
Produce a pressure signal, represent near the external pressure that at least one oceanic earthquake source is; And
Proofread and correct said source trigger pip according to this pressure signal, so that the actual source duration of ignition in each source and desired source, the error between the duration of ignition was minimum.
19, the method for claim 18 also comprises the steps:
With this pressure signal digitizing; And
Should send hull to by digitized pressure signal.
20, the method for claim 17 also comprises the steps:
For the igniting in each source, produce the ignition signal of this igniting time of origin of an expression; And
Proofread and correct said source trigger pip according to this ignition signal, so that the actual source duration of ignition in each source and desired source, the error between the duration of ignition was minimum.
21, the method for claim 20 also comprises the steps:
With this ignition signal digitizing; And
Should send hull to by digitized ignition signal.
22, the method for claim 17, wherein said those seismic origins pass through a umbilical cord by ship in tow, and said source control signal is given source control component by hull by a signal transmission component that is placed in this umbilical cord.
23, the method for claim 17 also comprises the steps:
With selected some oceanic earthquake source point fire;
For the igniting in each source, produce the ignition signal of this igniting time of origin of an expression;
With this ignition signal digitizing; And
Should send hull to by digitized ignition signal.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US70831085A | 1985-03-05 | 1985-03-05 | |
| US708,310 | 1985-03-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN86102257A true CN86102257A (en) | 1986-10-15 |
Family
ID=24845286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN198686102257A Pending CN86102257A (en) | 1985-03-05 | 1986-03-04 | Distributed marine seismic source control system and method |
Country Status (6)
| Country | Link |
|---|---|
| CN (1) | CN86102257A (en) |
| AU (1) | AU5431286A (en) |
| FR (1) | FR2578655A1 (en) |
| GB (1) | GB2172997A (en) |
| NL (1) | NL8600565A (en) |
| NO (1) | NO860780L (en) |
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| CN102565850A (en) * | 2012-01-01 | 2012-07-11 | 成都理工大学 | Wireless telemetry seismic signal acquisition system |
| CN102598153A (en) * | 2009-10-30 | 2012-07-18 | 阿克海底公司 | Integrated high power umbilical |
| CN103018768A (en) * | 2011-09-21 | 2013-04-03 | 地球物理维里达斯集团公司 | Steerable source systems and method |
| CN103129414A (en) * | 2011-11-25 | 2013-06-05 | 瑟塞尔公司 | Underwater floating device |
| CN103217706A (en) * | 2011-12-19 | 2013-07-24 | 瑟塞尔公司 | Method and device for managing the acoustic performances of a network of acoustic nodes arranged along towed acoustic linear antennas. |
| CN103582828A (en) * | 2011-06-08 | 2014-02-12 | 格库技术有限公司 | Enhancing low frequency content in marine simultaneous vibroseis aquisition |
| CN1987524B (en) * | 2005-12-21 | 2016-06-01 | Pgs地球物理公司 | There is the short seismic streamer draw zone of adjustable spring |
| CN106409399A (en) * | 2016-06-14 | 2017-02-15 | 常州船用电缆有限责任公司 | Marine airgun earthquake source cable |
| CN108027449A (en) * | 2015-07-07 | 2018-05-11 | 离子地球物理学公司 | Earthquake node through traction |
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| FR2728425B1 (en) * | 1994-12-15 | 1997-01-31 | France Etat Armement | ELECTROACOUSTIC LINEAR TRANSMISSION ANTENNA AND TRANSMISSION / RECEPTION ANTENNA COMPRISING SUCH ANTENNA |
| WO2001016622A1 (en) * | 1999-08-31 | 2001-03-08 | Trimble Navigation Limited | Control of sources in survey operations |
| US7359282B2 (en) * | 2003-05-16 | 2008-04-15 | Schlumberger Technology Corporation | Methods and apparatus of source control for borehole seismic |
| US8687460B2 (en) | 2003-05-16 | 2014-04-01 | Schlumberger Technology Corporation | Methods and apparatus of source control for synchronized firing of air gun arrays with receivers in a well bore in borehole seismic |
| US7974150B2 (en) | 2003-05-16 | 2011-07-05 | Schlumberger Technology Corporation | Methods and apparatus of source control for sequential firing of staggered air gun arrays in borehole seismic |
| US20060083109A1 (en) | 2004-10-14 | 2006-04-20 | Tsunehisa Kimura | Seismic source controller and display system |
| GB2441344B (en) | 2006-08-31 | 2009-11-04 | Westerngeco Seismic Holdings | Zero-offset seismic trace construction and its use |
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| US10234585B2 (en) * | 2015-12-10 | 2019-03-19 | Pgs Geophysical As | Geophysical survey systems and related methods |
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- 1986-03-03 NO NO860780A patent/NO860780L/en unknown
- 1986-03-04 CN CN198686102257A patent/CN86102257A/en active Pending
- 1986-03-05 GB GB08605372A patent/GB2172997A/en not_active Withdrawn
- 1986-03-05 NL NL8600565A patent/NL8600565A/en not_active Application Discontinuation
- 1986-03-05 AU AU54312/86A patent/AU5431286A/en not_active Abandoned
- 1986-03-05 FR FR8603087A patent/FR2578655A1/en not_active Withdrawn
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| CN103582828A (en) * | 2011-06-08 | 2014-02-12 | 格库技术有限公司 | Enhancing low frequency content in marine simultaneous vibroseis aquisition |
| CN103018768A (en) * | 2011-09-21 | 2013-04-03 | 地球物理维里达斯集团公司 | Steerable source systems and method |
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| CN108027449B (en) * | 2015-07-07 | 2020-11-10 | 离子地球物理学公司 | Towed seismic node |
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Also Published As
| Publication number | Publication date |
|---|---|
| NO860780L (en) | 1986-09-08 |
| GB2172997A (en) | 1986-10-01 |
| FR2578655A1 (en) | 1986-09-12 |
| NL8600565A (en) | 1986-10-01 |
| GB8605372D0 (en) | 1986-04-09 |
| AU5431286A (en) | 1986-10-16 |
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