CN210894725U

CN210894725U - Electric spark seismic source device and system thereof

Info

Publication number: CN210894725U
Application number: CN201921385097.7U
Authority: CN
Inventors: 王槐仁; 曹伟良; 王志敏
Original assignee: Hunan Aocheng Technology Co ltd
Current assignee: Hunan Aocheng Technology Co ltd
Priority date: 2019-08-23
Filing date: 2019-08-23
Publication date: 2020-06-30
Anticipated expiration: 2029-08-23

Abstract

The utility model discloses an electric spark seismic source device, which comprises a ground unit and an underground unit, wherein the ground unit comprises a power supply, a boosting assembly and a control assembly, and the underground unit comprises a capacitor assembly, a discharge switch assembly and an excitation probe; the ground unit is connected with the underground unit through a cable; the control assembly is respectively connected with the power supply and the boosting assembly, is used for controlling the power supply to supply power to the boosting assembly, is used for controlling the boosting assembly to charge the capacitor assembly and controls the conduction of the discharging switch assembly; the boosting assembly is connected with the power supply and is used for converting and boosting alternating current output by the power supply into direct current and outputting the direct current to charge the capacitor assembly; the capacitor assembly is connected with the boosting assembly through a cable and is connected with the discharging switch assembly, and the capacitor assembly comprises a plurality of capacitors connected in parallel and is used for storing energy; the excitation probe is connected with the discharge switch assembly and is used for releasing the energy stored by the capacitor assembly in the form of pulse current and generating shock pressure waves.

Description

Electric spark seismic source device and system thereof

Technical Field

The utility model belongs to the technical field of geophysical exploration, concretely relates to electric spark focus device and system thereof.

Background

At present, explosive sources, hammering sources, controllable sources, air gun sources, electric spark sources and the like are commonly used as seismic sources in oil exploration. The explosive source has the advantages of large energy, rich frequency and the like, but has certain dangerousness and is destructive to the environment. The hammering seismic source and the controllable seismic source are generally large in size and weight and are not suitable for being excited by a deep well. Air gun sources are commonly used for marine deepwater construction and are not suitable for land and mountain exploration. The electric spark seismic source has the advantages of small volume, large energy, safety, environmental protection, no damage and the like, is a green exploration seismic source, and is suitable for various field environment operations; the working principle of the electric spark seismic source is that the electric energy stored in a high-voltage capacitor is released by a discharge electrode at a very short moment, and the electric energy is converted into pulse pressure wave energy to carry out seismic exploration. Due to the advantages of the electric spark seismic source, the electric spark seismic source is widely used in the aspects of VSP (vertical seismic profiling), interwell seismic tomography, vibration oil extraction, engineering exploration and the like, and a better using effect is achieved.

The existing various underground electric spark seismic source equipment generally consists of a ground part and an underground part, the capacitance storage of the ground part needs to be transmitted to an underground probe through an underground cable of thousands of meters for excitation, the energy attenuation is very large, and the problems of small excitation energy in a deep well exist.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing an electric spark seismic source device and system to solve the electric capacity storage on ground and need carry to the excitation of probe in the pit through the cable that goes into the well of several kilometers, energy attenuation is very big, arouse the problem that the energy is little.

In order to achieve the above object, the present invention provides an electric spark source device, including: the ground unit comprises a power supply, a boosting assembly and a control assembly, and the underground unit comprises a capacitor assembly, a discharge switch assembly and an excitation probe; the ground unit is connected with the underground unit through a cable;

the control assembly is respectively electrically connected with the power supply and the boosting assembly, is used for controlling the power supply to supply power to the boosting assembly, is used for controlling the boosting assembly to charge the capacitor assembly and controls the discharge switch assembly to be conducted;

the boosting assembly is electrically connected with the power supply and is used for converting and boosting alternating current output by the power supply into direct current and outputting the direct current to charge the capacitor assembly;

the capacitor assembly is connected with the boosting assembly through the cable and is electrically connected with the discharge switch assembly, and the capacitor assembly comprises a plurality of capacitors connected in parallel and is used for storing energy;

the excitation probe is electrically connected with the discharge switch assembly and used for releasing the energy stored in the capacitor assembly in the form of pulse current and generating impact pressure waves.

Preferably, the cable comprises a plurality of fiber cores, wherein the fiber cores comprise a middle fiber core and a plurality of peripheral fiber cores arranged along the axis of the middle fiber core; each fiber core comprises a conductor and an insulating layer, the insulating layer is arranged on the outer side of the conductor, a total shielding layer is filled between the fiber cores, an inner steel wire armor layer and an outer steel wire armor layer are sequentially arranged on the outer side of the total shielding layer, and the thickness of the insulating layer arranged on the middle fiber core is larger than that of the insulating layer arranged on the peripheral fiber cores.

Preferably, the capacitor comprises a first barrel sleeved outside the capacitors, adjacent capacitors are connected through capacitor connectors, each capacitor connector comprises a first fixed seat, a second fixed seat, a first socket and a second socket, the outer side of each first fixed seat is fixedly connected with the inner side of the corresponding first barrel, a connecting groove is formed between one end of each first fixed seat and one end of each first barrel, a locking buckle is clamped in the connecting groove, the inner side of each first fixed seat is connected with the corresponding first socket, and the inner side of each first socket is connected with a first plug-in connector in a matching manner; one end of the first socket is connected with one end of the second socket, a second plug is connected in the second socket in a matching mode, one end of the first plug is connected with one end of the second plug, the outer side of the second socket is connected with the inner side of the second fixed seat, and the outer side of the second fixed seat is fixedly connected with the inner side of the first cylinder body.

Preferably, the capacitor and the discharge switch assembly are connected through the capacitor connector.

Preferably, still locate including the cover the second barrel in the excitation probe outside, and with the rubber bag that second barrel one end is connected, the inside cavity of rubber bag forms the rubber chamber, the one end that excites the probe is located in the rubber chamber, the outside that excites the probe is connected with the rubber bag connector, rubber bag connector outside threaded connection has second barrel connector, the outside of second barrel connector with the second barrel is inboard to be connected, the one end of rubber bag connector with the one end of second barrel connector forms the joint groove, the free end cooperation joint of rubber bag is in the joint groove.

Preferably, the rubber cavity is filled with a sodium chloride aqueous solution with the mass concentration of 0.1-4%.

Preferably, the discharge switch assembly further comprises a heat preservation cylinder sleeved on the outer side of the discharge switch assembly, one end of the heat preservation cylinder is connected with one end of the first cylinder, the other end of the heat preservation cylinder is connected with one end of the second cylinder, a heat preservation cavity is formed in the heat preservation cylinder in a hollow mode, and the heat preservation cavity is in a vacuum environment.

Preferably, the discharge switch assembly comprises a control circuit and a discharge switch, and the discharge switch is a vacuum trigger tube.

Preferably, the output end of the voltage boosting assembly is connected with a conductive slip ring, the conductive slip ring is arranged on a winch, the winch comprises a wire spool, the cable is wound on the wire spool, the cable is connected with the movable end of the conductive slip ring through the rotation center of the wire spool, the stationary end of the conductive slip ring is connected with the output end of the voltage boosting assembly, and the movable end of the conductive slip ring is in contact with the stationary end of the conductive slip ring in the rotation process of the wire spool to conduct electricity.

The utility model discloses another aspect provides an electric spark focus system, include: the electric spark seismic source device is arranged in the transmitting well, the downhole sensor is arranged in the receiving well, and the data acquisition device is arranged in the receiving well;

the electric spark seismic source device is used for releasing stored energy and generating shock pressure waves to form an excitation depth parameter and transmitting the excitation depth parameter to the data acquisition device;

the downhole sensor is used for acquiring the excitation depth parameter generated by the electric spark seismic source device to form a receiving depth parameter and transmitting the receiving depth parameter to the data acquisition device;

and the data acquisition device is used for receiving and analyzing the excitation depth parameter and the receiving depth parameter.

Compared with the prior art, the utility model discloses following beneficial effect has:

the embodiment of the utility model provides an electric spark focus device, all set up electric capacity subassembly and discharge switch subassembly and excitation probe in the underground, the energy that electric capacity subassembly stored passes through the cable transport and stimulates to the excitation probe, required cable length is short, the energy decay reduces, the excitation energy of excitation probe is big.

The electric spark seismic source system provided by the embodiment of the utility model adjusts the excitation depth of the electric spark seismic source device and the receiving depth of the underground sensor through continuous movement until the whole section is tested, and the inter-well seismic exploration data between the transmitting well and the receiving well can be obtained; the method can be applied to the field of petroleum exploration, including various borehole seismic and interwell seismic exploration, such as the exploration of parameters including reservoir thickness, oil-gas saturation, porosity and the like, lithology/sedimentary facies analysis, reservoir connectivity analysis and the like, and has wide application prospects in the exploration of earth deep resources such as coal fields, mines and the like.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is a schematic structural diagram of an electric spark seismic source device provided by the present invention;

fig. 2 is a schematic view of a cable structure provided by the present invention;

FIG. 3 is a schematic view of the structure of an underground unit provided by the present invention;

fig. 4 is a schematic structural diagram of a capacitor module according to the present invention;

fig. 5 is a schematic structural view of an excitation probe provided by the present invention;

FIG. 6 is one of the schematic structural views of the drawworks provided by the present invention;

fig. 7 is a second schematic structural diagram of the winch according to the present invention.

Wherein, each reference mark in the figure is:

100-a ground unit; 101-a power supply; 102-a voltage boost assembly; 103-a control component;

200-a cable; 210-core, 211-conductor; 212 — an insulating layer; 220 — total shield layer; 230-inner steel wire armor layer; 240-outer steel wire armor layer;

300-an underground unit; 301 — a capacitive component; 3011-a capacitor; 3012 — first cylinder; 302-a discharge switch assembly; 303-excitation of the probe; 3033-second cylinder; 3034-second cylinder connector; 304-cable joint; 305-capacitor terminals; 3051-a first fixed seat; 3052-a second fixed seat; 3053-a first socket; 3054-a second socket; 3055-locking buckle; 3056-a first plug; 3057-a second plug; 3058-a first seal ring; 306-a heat preservation cylinder; 307-rubber bag; 3071-rubber chamber; 3072-like the capsule connector; 3073-a second sealing ring; 308-piston ring;

400-a winch; 401 — conductive slip ring; 402-a wire spool; 403-insulating base; 404 — winch wheels; 405-hoisting the handle with a winch.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "length" - "width" - "up" - "down" - "front" - "back" - "left" - "right" - "vertical" - "horizontal" - "top" - "bottom" - "inside" - "outside" etc. indicate orientations or positional relationships based on those shown in the drawings, which are merely for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation-be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" - "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

As shown in fig. 1-7, the embodiment of the utility model provides an electric spark seismic source device and system thereof.

On the one hand, the embodiment of the utility model provides an electric spark focus device.

With reference to fig. 1 and 3, an embodiment of the present invention provides an electric spark source device, including: the ground unit 100 comprises a power supply 101, a boosting assembly 102 and a control assembly 103, and the underground unit 300 comprises a capacitor assembly 301, a discharge switch assembly 302 and an excitation probe 303; the ground unit 100 and the underground unit 300 are connected through a cable 200;

the control component 103 is electrically connected with the power supply 101 and the voltage boosting component 102 respectively, and is used for controlling the power supply 101 to supply power to the voltage boosting component 102, controlling the voltage boosting component 102 to charge the capacitor component 301, and controlling the discharging switch component 302 to be turned on;

the boosting assembly 102 is electrically connected to the power supply 101, and is configured to convert and boost the ac power output by the power supply 101 into dc power, and output the dc power to charge the capacitor assembly 301;

the capacitor assembly 301 is connected to the voltage boosting assembly 102 through the cable 200 and electrically connected to the discharge switch assembly 302, and the capacitor assembly 301 includes a plurality of capacitors 3011 connected in parallel and used for storing energy;

the excitation probe 303 is electrically connected to the discharge switch assembly 302, and is configured to discharge the energy stored in the capacitor assembly 301 in the form of a pulse current and generate a shock pressure wave.

Specifically, in the embodiment of the present invention, the control component 103 can control the power supply 101 to charge, and can convert 220V ac into high voltage dc for output, the high voltage dc charges the underground capacitor component 301 through the cable 200, and after the control component 103 detects that the underground capacitor component 301 stores energy to a preset voltage value, the power supply 101 automatically stops supplying power; when the downhole discharge switch assembly 302 is excited, the control assembly 103 controls the downhole discharge switch assembly 302 to be instantly conducted, the energy stored in the capacitor assembly 301 is transferred to the excitation probe 303 through the cable 200, so that a dielectric gap between the anode and the cathode of the excitation probe 303 is broken down, namely the excitation probe 303 discharges, and the energy stored in the capacitor assembly 301 is released in a discharge gap in a microsecond-level time in a form of strong pulse current to generate strong impact pressure waves.

In the embodiment of the present invention, when the capacitor module 301 is charged by the high voltage dc power, the voltage U (unit: volt) on the capacitor module 301 increases, and if the capacitance of the capacitor module 301 is C (unit: farad), the energy W (unit: joule) stored in the capacitor module 301 can be obtained by the following formula:

to increase the stored energy W of the capacitor assembly 301, the capacitor assembly 301 may include a plurality of capacitors 3011, each capacitor 3011 may be a cylindrical high-voltage energy-storage capacitor 3011 with high energy-storage density, the capacitance C may be 1600uF, and the maximum energy-storage voltage U is 5 KV. To increase the energy stored by the capacitive component 301, the number of capacitors 3011 in parallel may be increased. The capacitor 3011 may be made of polyester film, which can resist temperature up to 150 ℃. The greater the stored energy W of the capacitive assembly 301, the greater the seismic wave energy excited by the seismic source.

Specifically, the capacitor assembly 301 in the embodiment of the present invention may include several capacitors 3011 arranged in parallel, and the number of the capacitors 3011 may be 3, 5, 7, or 9 by way of example and not limitation. The embodiment of the utility model provides a can be according to actual need, nimble increase and decrease condenser 3011's quantity, nimble combination condenser 3011, the stored energy of each condenser that contains in the electric capacity subassembly 301 can be different. When the number of the capacitors 3011 is set to 3, the length of each capacitor 3011 may be 2.5 meters; accordingly, the sum of the lengths of the discharge switch assembly 302 and the excitation probe 303 may be 1 meter, at which time the excitation energy reaches 20 KJ; by adding the capacitor, the excitation energy can be expanded to be larger, and the detection depth can reach more than 5000 meters.

Specifically, the control component 103 can adopt a PLC intelligent control technology, and is simple and convenient to operate, stable and reliable.

The embodiment of the utility model provides an in, all set up capacitor assembly 301 and discharge switch subassembly 302 and excitation probe 303 in the underground, the energy that capacitor assembly 301 stored is carried to excitation probe 303 through cable 200 and is aroused, and required cable 200 length is short, and the energy decay reduces, and excitation probe 303's excitation energy is big.

The embodiment of the utility model provides a when using the oil exploration field, the impact pressure wave that usable excitation probe 303 produced, the vibration is separated stifled, resumes old oil well productivity.

The boosting assembly 102 can adopt a constant current technology, the current of the constant current technology is stable, and even if the capacitor 3011 in the capacitor assembly 301 is short-circuited for a long time, the boosting assembly 102 cannot be burnt out; the charging voltage of the capacitor 3011 can be controlled by the length of the charging time, and the danger of the charging voltage being too high can be prevented by controlling the time. The constant current may be set to 500 mA. Power supply 101 does electric spark seismic source device provide the energy, power supply 101's power is by the subassembly 102 decision that steps up, sets up to constant current 500mA in the subassembly 102 that steps up and charges, and the biggest charging power can reach 3KW, and for the reliability of assurance system, power supply 101's power can set up to 6 KW.

The embodiment of the utility model provides a can also include the display element, the display element can be operateed and keep watch on the system state of electric spark focus device through the display screen; when breaking down, the embodiment of the utility model provides a can automatic protection and alarm display alarm reason.

Referring to fig. 2, the cable 200 includes a plurality of cores 210, where the cores 210 include a central core and a plurality of peripheral cores disposed along an axis of the central core; each of the fiber cores 210 includes a conductor 211 and an insulating layer 212, an outer side of the conductor 211 is connected to an inner side of the insulating layer 212, a total shielding layer 220 is filled between the fiber cores 210, an inner steel wire armor layer 230 and an outer steel wire armor layer 240 are sequentially disposed on an outer side of the total shielding layer 220, wherein a thickness of the insulating layer 212 disposed on a middle fiber core is greater than a thickness of the insulating layer 212 disposed on a peripheral fiber core. Increasing the thickness of the insulating layer 212 provided in the middle core can increase the withstand voltage value of the cable 200.

Specifically, when the high-voltage direct current is conveyed to the underground to charge the capacitor 3011, in order to ensure safe conveyance of the high-voltage direct current, the cable 200 may adopt a 7-core cable 200, where the 7-core cable 200 includes 1 middle fiber core and 6 peripheral fiber cores arranged along the axis of the middle fiber core; the thickness of the insulating layer 212 in the middle fiber core can be thickened to 3mm, and the withstand voltage of the cable 200 can reach 8 KV; the middle fiber core is connected with the anode and can transmit 5 KV; any 2 peripheral fiber cores in the 6 peripheral fiber cores can be connected with a negative electrode of 0V, and the remaining 4 peripheral fiber cores can be used for conducting a discharge switch in the discharge switch assembly 302 and supplying power to the power supply 101.

With reference to fig. 3 and fig. 4, wherein, the embodiment of the present invention further includes a first cylinder 3012 sleeved outside the capacitor 3011, the adjacent capacitors 3011 are connected through a capacitor joint 305, the capacitor joint 305 includes a first fixing base 3051, a second fixing base 3052, a first socket 3053 and a second socket 3054, the outer side of the first fixing base 3051 is fastened and connected to the inner side of the first cylinder 3012, one end of the first fixing base 3051 and one end of the first cylinder 3012 form a connection slot, the connection slot is internally fastened and locked with a locking buckle 3055, the inner side of the first fixing base 3051 is connected to the first socket 3053, and the inner side of the first socket 3053 is connected to a first plug 3056 in a matching manner; one end of the first socket 3053 is connected with one end of the second socket 3054, a second plug-in connector 3057 is connected in the second socket 3054 in a matching manner, one end of the first plug-in connector 3056 is connected with one end of the second plug-in connector 3057, the outer side of the second socket 3054 is connected with the inner side of the second fixed seat 3052, and the outer side of the second fixed seat 3052 is fixedly connected with the inner side of the first cylinder 3012. The locking button 3055 is used to lock the first barrel 3012 and the capacitor connector 305.

The capacitor 3011 and the discharge switch assembly 302 may also be connected through the capacitor connector 305.

The capacitor 3011 and the boosting assembly 102 may also be connected through the cable connector 304. The structure of the cable connector 304 is the same as that of the capacitor connector 305, and the specific structure of the cable connector 304 will not be described again.

Preferably, a first sealing ring 3058 may be disposed between the first cylinder 3012 and the capacitor connector 305, and preferably, the first sealing ring 3058 may be a viton O-ring, which may be used for sealing and waterproofing.

Combine fig. 5, wherein, the embodiment of the utility model provides a still locate including the cover arouse the second barrel 3033 in the probe 303 outside, and with the rubber bag 307 that second barrel 3033 one end is connected, the inside cavity of rubber bag 307 forms rubber chamber 3071, the one end of arousing probe 303 is located in the rubber chamber 3071, the outside of arousing probe 303 is connected with rubber bag connector 3072, rubber bag connector 3072 outside threaded connection has second barrel connector 3034, the outside of second barrel connector 3034 with second barrel 3033 is inboard to be connected, the one end of rubber bag connector 3072 with the one end of second barrel connector 3034 forms the joint groove, the free end cooperation joint of rubber bag 307 is in the joint groove. The second cylinder connector 3034 can lock the second cylinder 3033 and the image capsule connector 3072 in a threaded manner.

Preferably, a second sealing ring 3073 may be disposed between the second cylinder 3033 and the second cylinder connector 3034, and preferably, the second sealing ring 3073 may be a viton O-ring, which may be used for sealing and waterproofing.

Preferably, the rubber cavity 3071 is filled with a sodium chloride aqueous solution with a mass concentration of 0.1% -4%; the positive electrode and the negative electrode of the excitation probe 303 are positioned in the rubber cavity 3071, and the excitation probe 303 is positioned in a sealed environment; when the content of the conductive ions in the sodium chloride aqueous solution is low, the electric arc resistance of the positive electrode and the negative electrode of the excitation probe 303 increases, and although a high pressure peak can be obtained, the electric leakage time is prolonged and the prolonged time is unstable, which results in unstable pressure waveform, and conversely, when the conductivity is increased, the pressure peak is reduced, but the pressure waveform is stable. Set up to 0.1% -4% with the concentration of sodium chloride aqueous solution, can guarantee that the pressure peak value keeps in a relatively better value range, mass concentration is 0.1% -4% sodium chloride aqueous solution, can improve the conductivity, and then improve energy conversion efficiency, and because exciting probe 303 is in sealed environment, can not receive the influence of exciting the environment if there is the petroleum well of mud, exciting probe 303 is in the little sealed environment of seismic attenuation, and fill with the sodium chloride aqueous solution in the sealed environment, can guarantee to excite stably, the interference killing feature is strong, the system fault rate is low.

The excitation probe 303 can be designed in a cylindrical structure, and is made of tungsten copper, the electrode in the center of the circle is an anode, the outer ring is a cathode, and the insulating material between the anode and the cathode can be made of fluororubber. The excitation probe 303 is resistant to high temperatures, abrasion, and corrosion.

With reference to fig. 3, wherein, the embodiment of the present invention further includes that the cover is located the heat preservation section of thick bamboo 306 outside the discharge switch assembly 302, the one end of the heat preservation section of thick bamboo 306 with the one end of first barrel 3012 is connected, the other end of the heat preservation section of thick bamboo 306 with the one end of second barrel 3033 is connected, the inside cavity of the heat preservation section of thick bamboo 306 forms the heat preservation chamber, and the heat preservation intracavity is vacuum environment. Can guarantee through the heat preservation chamber that discharge switch subassembly 302 is thermal-insulated, play the heat preservation effect to discharge switch subassembly 302, so that the embodiment of the utility model provides a high pressure resistant high temperature resistant grade of electric spark seismic source device is high.

The discharge switch assembly 302 includes a control circuit and a discharge switch, and the discharge switch is a vacuum trigger tube. The vacuum trigger tube has the advantages of short conduction time, high response speed, large temperature resistance range and high temperature resistance. Because the conduction time of the vacuum trigger tube is short, the closing speed of the switch is within tens of microns, the energy stored in the capacitor assembly 301 can be quickly released, and the conversion efficiency of the stored energy is high; preferably, the vacuum trigger tube can be a model DZCF701/35, the temperature resistance range of the vacuum trigger tube can be-25-150 ℃, the response speed of the vacuum trigger tube is less than 10uS, and the time delay of the vacuum trigger tube is less than 50 uS.

Referring to fig. 3, the embodiment of the present invention further includes a piston ring 308 connected to one end of the image capsule 307, wherein the piston ring 308 can adjust the internal and external pressure balance of the excitation probe.

With reference to fig. 6 and 7, an output end of the voltage boosting assembly 102 is connected to a conductive slip ring 401, the conductive slip ring 401 is disposed on a winch 400, the winch 400 includes a wire spool 402, the cable 200 is wound on the wire spool 402, the cable 200 is connected to a moving end of the conductive slip ring 401 through a rotation center of the wire spool 402, a stationary end of the conductive slip ring 401 is connected to the output end of the voltage boosting assembly 102, and the moving end of the conductive slip ring 401 is in contact with the stationary end of the conductive slip ring 401 during rotation of the wire spool 402 for conduction. Conductive slip ring 401 may prevent cable 200 from twisting in a 360 ° rotation.

Preferably, an insulating seat 403 is connected to the outside of conductive slip ring 401.

Preferably, the winch 400 further includes a winch bracket connected to the wire spool 402, the winch bracket being used to fixedly support the wire spool 402;

the winch 400 further comprises four rubber wheels 404, the rubber wheels 404 are arranged at the bottom of the winch support, the number of the rubber wheels 404 can be four, and the four rubber wheels 404 are provided with brakes and reversing joints, so that the winch 400 can move conveniently.

The winch support is connected with a winch hoisting handle 405, and the winch hoisting handle 405 is used for pushing and lifting the winch 400.

During field logging, the winch 400 is installed near the wellhead or on a logging truck, and the cable 200 records the downhole depth through a depth counting device. The underground unit 300 is constructed by connecting the capacitor assembly 301, the discharge switch assembly 302 and the excitation probe 303 step by step as shown in fig. 3, and checking whether the various sealing rings are intact and locked at the joints before connection. The excitation probe 303 is lowered through the downhole sheave to the depth of the excitation to be detected. After equipment is ready, system self-checking is carried out, after the self-checking passes, the control assembly 103 sets for the voltage that arouses each time like the ground control box, and when the capacitor assembly 301 charges to the default, the system stops charging automatically, and the underground discharge switch of ground control box control is closed, and the energy of storage in the capacitor assembly 301 releases in the twinkling of an eye through arousing probe 303, produces the seismic wave of vibration impact, sets up and can monitor equipment safety state, charge-discharge overall process etc. in ground control box complex PLC control software. And each time of charging and excitation, the receiving system finishes a borehole seismic signal acquisition process.

The embodiment of the utility model provides an on the other hand provides an electric spark focus system, include: the electric spark source device is arranged in the transmitting well, the downhole sensor is arranged in the receiving well, and the data acquisition device is arranged in the receiving well;

The embodiment of the utility model provides a can be applied to the oil exploration field, including various well earthquake, well-to-well seismic exploration, if find reservoir thickness, contain parameters such as oil and gas saturation, porosity, lithology/sedimentary facies analysis, reservoir connectivity analysis etc. have extensive application prospect in the exploration of earth deep resources such as coal field, mine.

During field construction, taking an interwell seismic construction scheme as an example, the transmitting well is used for arranging the electric spark seismic source device, the receiving well is used for arranging the downhole sensor, and the triggering signal lines of the downhole sensor and the electric spark seismic source device are respectively connected to a data acquisition device such as a seismic data acquisition instrument. And adjusting the excitation depth of the electric spark seismic source device and the receiving depth of the underground sensor through continuous movement until the whole section is tested, and obtaining the inter-well seismic exploration data between the transmitting well and the receiving well.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and all modifications, equivalents, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the invention.

Claims

1. An electric spark source device, comprising: the ground unit comprises a power supply, a boosting assembly and a control assembly, and the underground unit comprises a capacitor assembly, a discharge switch assembly and an excitation probe; the ground unit is connected with the underground unit through a cable;

2. The electric spark seismic source device according to claim 1, wherein the cable comprises a plurality of cores, the plurality of cores comprise a middle core and a plurality of peripheral cores arranged along the axis of the middle core; each fiber core comprises a conductor and an insulating layer, the insulating layer is arranged on the outer side of the conductor, a total shielding layer is filled between the fiber cores, an inner steel wire armor layer and an outer steel wire armor layer are sequentially arranged on the outer side of the total shielding layer, and the thickness of the insulating layer arranged on the middle fiber core is larger than that of the insulating layer arranged on the peripheral fiber cores.

3. The electric spark source device according to claim 1, further comprising a first barrel sleeved outside the capacitors, wherein adjacent capacitors are connected through a capacitor joint, the capacitor joint comprises a first fixing seat, a second fixing seat, a first socket and a second socket, the outer side of the first fixing seat is fixedly connected with the inner side of the first barrel, one end of the first fixing seat and one end of the first barrel form a connecting groove, a locking buckle is clamped in the connecting groove, the first socket is connected to the inner side of the first fixing seat, and a first plug is connected to the inner side of the first socket in a matching manner; one end of the first socket is connected with one end of the second socket, a second plug is connected in the second socket in a matching mode, one end of the first plug is connected with one end of the second plug, the outer side of the second socket is connected with the inner side of the second fixed seat, and the outer side of the second fixed seat is fixedly connected with the inner side of the first cylinder body.

4. The electric spark seismic source device according to claim 3, wherein the capacitor and the discharge switch assembly are connected by the capacitor connector.

5. The electric spark source device according to claim 3, further comprising a second cylinder sleeved outside the excitation probe, and a rubber bag connected to one end of the second cylinder, wherein a rubber cavity is formed in the rubber bag, one end of the excitation probe is located in the rubber cavity, a rubber bag connector is connected to the outside of the excitation probe, a second cylinder connector is connected to the outside of the rubber bag connector in a threaded manner, the outside of the second cylinder connector is connected to the inside of the second cylinder, a clamping groove is formed by one end of the rubber bag connector and one end of the second cylinder connector, and a free end of the rubber bag is clamped in the clamping groove in a matching manner.

6. The electric spark seismic source device according to claim 5, wherein the rubber cavity is filled with a sodium chloride aqueous solution with the mass concentration of 0.1% -4%.

7. The electric spark seismic source device according to claim 5, further comprising a heat preservation cylinder sleeved outside the discharge switch assembly, wherein one end of the heat preservation cylinder is connected with one end of the first cylinder, the other end of the heat preservation cylinder is connected with one end of the second cylinder, a heat preservation cavity is formed in the heat preservation cylinder in a hollow mode, and a vacuum environment is formed in the heat preservation cavity.

8. The electric spark source device according to any one of claims 1 to 7, wherein the discharge switch assembly comprises a control circuit and a discharge switch, and the discharge switch is a vacuum trigger tube.

9. The electric spark source device according to any one of claims 1 to 7, wherein an output end of the voltage boosting assembly is connected with a conductive slip ring, the conductive slip ring is arranged on a winch, the winch comprises a wire reel, the cable is wound on the wire reel, the cable is connected with a moving end of the conductive slip ring through a rotation center of the wire reel, a static end of the conductive slip ring is connected with the output end of the voltage boosting assembly, and the moving end of the conductive slip ring is in contact with the static end of the conductive slip ring to conduct electricity during rotation of the wire reel.

10. An electric spark source system, comprising: the electric spark seismic source device as claimed in any one of claims 1 to 9 arranged in a transmitting well, a downhole sensor arranged in a receiving well and a data acquisition device;