CN114153004A - Active excitation type precise evaluation device for vertical content distribution of submarine hydrate reservoir - Google Patents
Active excitation type precise evaluation device for vertical content distribution of submarine hydrate reservoir Download PDFInfo
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- CN114153004A CN114153004A CN202111352922.5A CN202111352922A CN114153004A CN 114153004 A CN114153004 A CN 114153004A CN 202111352922 A CN202111352922 A CN 202111352922A CN 114153004 A CN114153004 A CN 114153004A
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 11
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- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V11/00—Prospecting or detecting by methods combining techniques covered by two or more of main groups G01V1/00 - G01V9/00
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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- Y02A90/30—Assessment of water resources
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Abstract
The invention relates to the content measurement of seabed hydrate, in particular to an active excitation type precise evaluation device for the vertical content distribution of a seabed hydrate reservoir. The gas collection mechanism is fixed above the screw-in long sleeve, the screw-in long sleeve is in a tubular design, a plurality of groups of thermal excitation mechanisms are fixed on the outer wall of the screw-in long sleeve at intervals along the axial direction of the screw-in long sleeve, and each group of thermal excitation mechanisms comprises a plurality of thermal exciters which are positioned in the same horizontal direction and are uniformly arranged at intervals along the circumferential direction of the long sleeve; still be equipped with the directional direction passageway of several groups that temperature sensor and axial interval along long sleeve set up on the long sheathed tube of screw-in type's the lateral wall, all be equipped with temperature sensor and a set of directional direction passageway in the top of every group thermal excitation mechanism, every directional direction passageway of group includes along being located same horizontal direction and the even interval several directional direction passageway that sets up of circumferencial direction along long sleeve.
Description
Technical Field
The invention relates to the content measurement of seabed hydrate, in particular to an active excitation type precise evaluation device for the vertical content distribution of a seabed hydrate reservoir.
Background
Hydrates are ice-like crystalline substances formed from natural gas and water under high pressure and low temperature conditions, also known as "combustible ice". At present, the development and drilling of hydrates in various countries in the world are in deep water, fire and heat, and the hydrates are also more and more important as energy sources available for human beings.
The method is of great importance in knowing the position and distribution characteristics of the natural gas hydrate and is a first premise of all subsequent work. The detection technologies popular in the world currently mainly include acoustic detection technology, time domain reflection technology, impedance detection technology, TDR and other test joint detection technologies. The most important effective detection means at the present stage is to further complete the determination of the hydrate distribution area and the development of hydrates by detecting the distribution of cold spring plumes in seawater.
Theories and practices prove that the temperature and pressure conditions for forming the hydrate, namely the hydrate 'stable region', of the settled layer in the sea area with the water depth of more than 300 m are satisfied, so that a favorable area of a natural gas hydrate mineral deposit is found, but the temperature or the pressure of the natural gas hydrate 'stable region' can be changed due to the influence of factors such as underground hydrothermal activity, ground tectonic movement, global climate warming and the like, and the condition for keeping the hydrate stable is not satisfied, so that the hydrate is decomposed into free gas and water; if suitable migration channels are present, the free gas migrates to leak into the seawater to form a plume. The seawater containing free gas (cold spring) and the surrounding seawater have different physical properties. The cold spring, plume, and hydrate are closely related, the seafloor plume usually develops in the overlying water of the active cold spring, the plume is a direct manifestation of seafloor gas leakage, and the seafloor strata under the cold spring area is often rich in gas hydrates. The hydrate can coexist with the plume methane bubble in seawater, or be an independent hydrate sheet, or be wrapped outside the methane bubble; the gas source for the plume may be methane gas from hydrate decomposition in the formation and free gas from hydrate formation.
The mainstream mode for detecting the distribution and content of the submarine natural gas hydrate reservoir at the present stage mainly depends on the monitoring of geophysical to cold spring plumes, firstly, the distribution range of the hydrate is determined, then, the large-scale evaluation is carried out by adopting a marine geophysical detection means, and after the evaluation is finished, because the geophysical detection mode has the defects of inaccuracy, dependence on artificial experience, incapability of carrying out detailed survey on the hydrate reservoir and the like, logging, drilling and sampling are carried out aiming at a certain point according to the judgment of an expert, so that the distribution of the hydrate reservoir in the area is defined.
However, after the logging, drilling and sampling operations are completed, the disturbance to the soil body in the drilling process is unavoidable, the interaction between seawater and the soil body caused by the leaving of the drill hole and the reduction of the ballast protection effect of the overburden layer directly result in large changes of the super-pore water pressure, the temperature, the salinity, the PH and the like, and the occurrence form and the distribution condition of the natural gas hydrate are greatly influenced by the temperature field and the pressure field of the reservoir, so that the secondary distribution of the natural gas hydrate is directly caused, and the accurate evaluation of the vertical content distribution of the submarine hydrate is further influenced. In summary, the prior art cannot accurately evaluate the secondary distribution condition of the gas hydrate caused by drilling.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides an active excitation type precise evaluation device for the vertical content distribution of the seabed hydrate reservoir, which realizes the precise evaluation of the vertical content distribution of the seabed hydrate.
The technical scheme of the invention is as follows: an active excitation type precise evaluation device for vertical content distribution of a submarine hydrate reservoir comprises a gas collection mechanism and a screw-in type long sleeve, wherein the gas collection mechanism is fixed above the screw-in type long sleeve, the screw-in type long sleeve is in a tubular design, a plurality of groups of thermal excitation mechanisms are fixed on the outer wall of the screw-in type long sleeve at intervals along the axial direction of the screw-in type long sleeve, and each group of thermal excitation mechanisms comprises a plurality of thermal exciters which are positioned in the same horizontal direction and are uniformly arranged at intervals along the annular direction of the long sleeve;
the side wall of the screw-in type long sleeve is also provided with a temperature sensor and a plurality of groups of directional guide channels which are arranged at intervals along the axial direction of the long sleeve, the temperature sensor and the group of directional guide channels are arranged above each group of thermal excitation mechanisms, and each group of directional guide channels comprises a plurality of directional guide channels which are arranged at intervals along the circumferential direction of the long sleeve and are positioned in the same horizontal direction;
the gas collecting mechanism comprises an upper fixed shell, a rotating shaft and a plurality of circulating rotating boxes fixed on the rotating shaft, wherein the upper fixed shell is fixedly connected with the top of the screwed-in type long sleeve, the rotating shaft is rotatably connected with the upper fixed shell, a collecting cavity is arranged in each circulating rotating box, one side of each circulating rotating box is provided with an opening, the circulating rotating boxes are uniformly arranged along the annular outer surface of the rotating shaft at intervals, the side edge of one side corresponding to the bottom of each circulating rotating box is fixedly connected, the rotating shaft is positioned at the fixed connection part of each circulating rotating box, when the circulating rotating box rotates to the bottommost part, the opening of each circulating rotating box is positioned right above the opening at the top of the screwed-in type long sleeve, and the rotating box is in an inverted buckle shape;
and an optical ranging unit and a resistivity unit are arranged in the circulating rotating box body.
In the invention, two circulating rotating box bodies are fixed on the outer side of the rotating shaft and fixedly connected through the side edge of one side corresponding to the bottom, the bottom surfaces of the two circulating rotating box bodies form 180 degrees, the openings of the two circulating rotating box bodies face different directions respectively, and when the opening of one circulating rotating box body faces downwards, the opening of the other circulating rotating box body faces upwards.
In the invention, four circulating rotating box bodies can be further fixed on the outer side of the rotating shaft, the four circulating rotating box bodies are connected through the side edge of one side corresponding to the bottom, and the bottom surfaces of two adjacent circulating rotating box bodies form a 90-degree angle. The number of the circulating rotating boxes outside the rotating shaft can be more, and the circulating rotating boxes are not limited to two or four, and can be an even number.
The directional guide channels are arranged at intervals along the radial direction and the axial direction of the screwed-in long sleeve.
The optical ranging unit comprises a laser emitting module and a distance side-out module, the laser emitting module comprises a laser emitter, and the laser emitter is located on the bottom surface of the circulating rotating box body.
The resistivity unit is positioned in the circulating rotating box body and comprises two resistivity probe rods fixedly connected with the bottom of the circulating rotating box body, each resistivity probe rod comprises a plurality of spiral electrode modules, each spiral electrode module comprises a cylindrical module main body and a movable spiral electrode surrounding the annular outer side of the module main body, a mounting groove and a connecting hole are formed in each module main body, a lead connected with the spiral electrode is arranged in each mounting groove, a fixing rod is arranged in each connecting hole, each spiral main body is fixedly connected with the corresponding fixing rod, and the spiral electrode modules are arranged along the axial direction of the corresponding probe rod;
the spiral electrode is equal in pitch to the module body in height, the top end of the spiral electrode is fixedly connected with the module body, a sliding groove which is axially arranged is formed in the annular side wall of the module body, the electrode transmission fixing pieces are arranged in the sliding groove in a sliding mode and are fixedly connected with the transmission cable, the electrode transmission fixing pieces slide up and down in the sliding groove under the driving of the transmission cable, the electrode transmission fixing pieces are arranged at the half pitch of the spiral electrode and the bottom end point of the spiral electrode and are fixedly connected with the spiral electrode, and the deformation of the spiral electrode is controlled through the sliding of the two electrode transmission fixing pieces at the middle part and the bottom of the spiral electrode, so that a closed annular electrode is formed.
The device also comprises a control unit which is electrically connected with the rotating shaft, the optical ranging unit, the resistivity unit, the temperature sensor and the directional guide channel respectively.
The thermal exciter is columnar, external threads are arranged on the outer surface of the circumference of the exciter, and the thermal exciter can be screwed in or out through the external threads.
The invention has the beneficial effects that:
through pivot and with pivot fixed connection's several circulation rotation box, in the collection process, the automatic upset of circulation rotation box has realized collecting in succession natural gas hydrate plume in a collection period, the accuracy of collection result has been improved greatly, and through resistivity unit and optical ranging unit, confirm gaseous state, liquid, the ratio of solid-state crystal particulate matter in coordination, invert the data, and then calculate the natural gas hydrate content distribution and the occurrence state of different excitation regions of department, thereby realized the accurate aassessment to the vertical content distribution of submarine hydrate.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic cross-sectional view of the present invention;
FIG. 3 is a schematic view of a first configuration of a gas collection apparatus;
FIG. 4 is a second schematic view of the gas collection apparatus;
FIG. 5 is a schematic diagram of a resistivity probe;
FIG. 6 is a schematic structural view of the spiral electrode module when not in operation;
fig. 7 is a schematic structural diagram of the spiral electrode module in an operating state.
In the figure: 1, a gas collecting mechanism; 2, directional guide channel; 3 screwing-in type long sleeve; 4 a temperature sensor; 5 a thermal excitation mechanism; 6, fixing the shell on the upper part; 7 circularly rotating the box body; 8, a rotating shaft; 10 an optical ranging unit; 11 a resistivity cell; 12 resistivity probe; 13 a helical electrode module; 1301 a module body; 1302 a helical electrode; 1303 a sliding groove; 1304 an electrode drive mount; 1305 a drive cable; 1306 ring electrode.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the following description, specific details are set forth in order to provide a thorough understanding of the present invention. The invention can be implemented in a number of ways different from those described herein and similar generalizations can be made by those skilled in the art without departing from the spirit of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
As shown in fig. 1 to 2, the active excitation type precise evaluation device for the vertical content distribution of the submarine hydrate reservoir according to the present invention includes a gas collection mechanism 1 and a screw-in long casing 3, wherein the gas collection mechanism 1 is fixed above the screw-in long casing 3. The screw-in type long sleeve 3 is in a tubular design, and a plurality of groups of thermal excitation mechanisms are fixed on the outer wall of the screw-in type long sleeve 3 at intervals along the axial direction of the screw-in type long sleeve. Each group of thermal excitation mechanisms comprises a plurality of thermal exciters which are positioned in the same horizontal direction and are uniformly arranged along the circumferential direction of the long sleeve at intervals. In this embodiment, every group thermal excitation mechanism includes two thermal exciters that set up along screw in long sheathed tube axial symmetry, and the thermal exciter is the column, and its circumference surface is equipped with the external screw thread, can realize the screw in or the back-out of thermal exciter through the external screw thread. The thermal excitation system in the initial state is positioned in the screw-in type long sleeve 3, and the outer side of the thermal excitation system is flush with the outer wall of the screw-in type long sleeve; during operation, the thermal actuator is screwed out of the screwed-in long casing 3 and inserted into the external soil. In the heating process of the thermal exciter, the temperature of the soil body around reaches a certain temperature by controlling the temperature change of the thermal exciter, and then the hydrate is heated to be converted from a solid state into a gas-liquid state.
Still be equipped with the directional direction passageway 2 of multiunit on the lateral wall of the long sleeve pipe of screw-in 3, the directional direction passageway 2 of multiunit sets up along the axial interval of the long sleeve pipe of screw-in 3, and all is equipped with a set of directional direction passageway 2 in the top of every group thermal excitation mechanism 5, and every directional direction passageway 2 of group includes along being located same horizontal direction and along the several directional direction passageway that the even interval of circumferencial direction of long sleeve pipe set up. The opening and closing states of the directional guide channels 2 are controllable, when one group of thermal excitation mechanisms 5 works, the directional guide channels 2 corresponding to the group of thermal excitation mechanisms are opened, and the directional guide channels of other groups are in the closed state. The gas hydrate generated by the action of the thermal excitation mechanism is extruded into the screw-in type long sleeve 3 through the directional guide channel 2 under the action of larger pressure, and the gas in the screw-in type long sleeve 3 cannot overflow through the channel. Due to the low gas density and high temperature, the gaseous products rise continuously in the screwed-in long sleeve 3 and finally rise to the gas collection mechanism 1. The side wall of the screw-in type long sleeve 3 is also provided with a temperature sensor 4, and the temperature of the surrounding soil body is sensed in real time through the temperature sensor 4, so that the heating temperature of the surrounding soil body by the thermal heating mechanism 5 is controlled.
The gas collecting mechanism comprises an upper fixing shell 6, a rotating shaft 8 and a plurality of circulating rotating box bodies 7 fixed on the rotating shaft 8, the upper fixing shell 6 is fixedly connected with the top of the screwed long sleeve 3, and the rotating shaft 8 is rotatably connected with the upper fixing shell 6. A collecting cavity is arranged in the circulating rotation box body 7, an opening is arranged on one side of the circulating rotation box body 7, and the plume of the natural gas hydrate enters the circulating rotation box body through the opening. In this embodiment, two circulation rotating boxes 7 are fixed on the rotating shaft 8, and the two circulation rotating boxes 7 are fixedly connected through the side edge of one side corresponding to the bottom. The bottom surfaces of the two circulating rotating box bodies 7 are 180 degrees, the openings of the two circulating rotating box bodies face to different directions respectively, namely when the opening of one circulating rotating box body faces downwards, the opening of the other circulating rotating box body faces upwards. When the circulation rotation box body 7 rotates to the bottommost part, the opening of the circulation rotation box body 7 is positioned right above the top opening of the screw-in type long sleeve 3. At the moment, the rotating box body 7 is in an inverted buckle shape, so that the gas natural gas hydrate can be effectively condensed into a solid state or a liquid state in the process of entering the box body for collection.
The rotating shaft 8 is positioned at the joint of the two circulating rotating boxes, and the circulating rotating box 7 can be driven to rotate in the rotating process of the rotating shaft 8. In the rotating process of the rotating shaft 8, after one of the circulating rotating box bodies 7 is turned to a certain position to release collected substances, the other circulating rotating box body is used as a supplement to perform a collection task of the next stage, so that the purpose of non-intermittent collection is achieved.
In a special case, namely, the volume of the gas natural gas hydrate excited at a certain layer position is larger than the gas accommodating volume in the circulating rotating box body 7, at the moment, the gas rising into the box body generates upward buoyancy on the circulating rotating box body, and when the gas in the box body is continuously increased, the buoyancy is correspondingly increased. The buoyancy generated when the gas in the circulating rotating box body is full can be calculated, so that the weight of the circulating rotating box body is correspondingly set, and the circulating rotating box body is guaranteed to be automatically overturned due to the fact that the buoyancy is larger than the gravity after the circulating rotating box body is full of the gas.
In the invention, four circulating rotating box bodies can be further fixed on the outer side of the rotating shaft, the four circulating rotating box bodies are uniformly arranged along the annular outer surface of the rotating shaft at intervals, the four circulating rotating box bodies are connected through one side edge corresponding to the bottom, the rotating shaft is arranged at the intersection of the four circulating rotating box bodies, and the bottom surfaces of two adjacent circulating rotating box bodies form a 90-degree angle. The number of the circulating rotating boxes outside the rotating shaft can be more, and the circulating rotating boxes are not limited to two or four, and can be an even number.
An optical ranging unit 10 and a resistivity unit 11 are arranged in each circulating rotating box body. The optical ranging unit 10 includes a laser emitting module and a distance side-out module, the laser emitting module includes a laser emitter, and the laser emitter is located on the bottom surface of the circulating rotating box body. The laser emitter emits a piece of emitted light, the emitted light can be reflected after meeting a seawater interface, no obvious reflection mechanism exists when meeting a gas crystal, then the module is laterally taken out according to the distance, the rising height of seawater in the box body at a certain moment can be obtained, and the seawater ratio can be obtained through the rising height.
Because the resistivity difference between the solid particles and the gaseous particles is large, and the resistivity and the conductivity are negative reciprocals, the resistivity probe rod can obtain the proportion between the solid particles and the liquid particles through inversion after measuring the resistivity by adopting a Schlumberger electrode method. The occurrence state of the natural gas hydrate is detected through the resistivity probe rod and the difference between the occurrence state and the collected substances is detected, and then the detected results of the optical ranging unit are comprehensively compared, so that the substance ratio of a gas phase, a liquid phase and a solid phase at a certain moment can be obtained, and the reservoir hydrate distribution occurrence characteristics of the excited layer are further analyzed.
The invention also comprises a control unit, and the data transmission unit is respectively and electrically connected with the rotating shaft 8, the optical ranging unit 10, the resistivity unit 11, the temperature sensor 4 and the directional guide channel 2.
Before the device works, the whole device is screwed into a drilled well by the aid of an existing drilled well part, and the screwed-in long casing 3 is attached to the drilled well. When the device works, the thermal excitation mechanisms and the directional guide channels of all the layers are sequentially started under the condition that different excitation parts have the same temperature. When the thermal excitation mechanism 5 at a certain layer position works, the natural gas hydrate at the layer position is heated and decomposed into gaseous products, and the gaseous products enter the internal channel of the screwing-in type long sleeve 3 through the directional guide channel 2 at the layer position. Due to the low gas density and high temperature, the gaseous products rise continuously in the screwed long sleeve until they rise to the gas collection mechanism 1. At the moment, the opening of one of the circulating rotating boxes faces to the right lower part and is positioned at the collecting station, and the opening of the other circulating rotating box faces to the right upper part and is positioned at the replacement station. After the gas collection period has started, the gaseous products enter the circulating rotary box 7, and due to the nature of the gaseous natural gas hydrates, these substances condense into liquid or solid particles adhering to the inner surface of the circulating rotary box 7. Along with the continuous accumulation of natural gas hydrate volume, the buoyancy that the circulation rotated box 7 received constantly increases, and after buoyancy was greater than box gravity, under the effect of buoyancy, circulation rotated box 7 will revolute 8 the axle and overturn fast, will be full of gaseous circulation and rotate box 7 and arrange the top in, and the circulation that originally is in the replacement station rotates to collecting station, continues to collect. The above actions are then repeated until the gas collection cycle is complete. During the whole process, each turn is recorded by the data transmission unit and finally accumulated.
The mixture of seawater, hydrate crystals and gaseous natural gas hydrates is collected by the gas collection mechanism 1, the ratio of each component of the mixture is measured by the resistivity unit 11 and the optical distance measuring unit 10 in the gas collection mechanism 1, and the content distribution and occurrence state of the natural gas hydrates in the excited area are further calculated. And then thermal excitation mechanisms and directional guide channels of other layers are opened in sequence, so that the occurrence and content of the natural gas hydrate of any reservoir can be judged, and finally the vertical content distribution of the submarine hydrate is accurately evaluated.
The active excitation type precise evaluation device for the vertical content distribution of the seabed hydrate reservoir provided by the invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention. The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. The utility model provides an accurate evaluation device of vertical content distribution of initiative excitation formula submarine hydrate reservoir which characterized in that: the gas collecting device comprises a gas collecting mechanism (1) and a screwed long sleeve (3), wherein the gas collecting mechanism (1) is fixed above the screwed long sleeve (3), the screwed long sleeve (3) is in a tubular design, a plurality of groups of thermal excitation mechanisms are fixed on the outer wall of the screwed long sleeve (3) at intervals along the axial direction of the screwed long sleeve, and each group of thermal excitation mechanisms comprises a plurality of thermal exciters which are positioned in the same horizontal direction and are uniformly arranged at intervals along the annular direction of the long sleeve;
the side wall of the screw-in type long sleeve (3) is also provided with a temperature sensor (4) and a plurality of groups of directional guide channels (2) which are arranged at intervals along the axial direction of the long sleeve, the temperature sensor (4) and a group of directional guide channels (2) are arranged above each group of thermal excitation mechanisms (5), and each group of directional guide channels (2) comprises a plurality of directional guide channels which are positioned in the same horizontal direction and are uniformly arranged at intervals along the circumferential direction of the long sleeve;
the gas collecting mechanism comprises an upper part fixed shell (6), a rotating shaft (8) and a plurality of circulating rotating box bodies (7) fixed on the rotating shaft (8), the upper part fixed shell (6) is fixedly connected with the top of the screwed-in long sleeve (3), the rotating shaft (8) is rotatably connected with the upper part fixed shell (6), a collecting cavity is arranged in each circulating rotating box body (7), one side of each circulating rotating box body (7) is provided with an opening, the circulating rotating box bodies (7) are uniformly arranged along the annular outer surface of the rotating shaft (8) at intervals, the side edge of one corresponding side of the bottom of each circulating rotating box body is fixedly connected, the rotating shaft (8) is positioned at the fixed connection part of each circulating rotating box body, when the circulating rotating box body (7) rotates to the bottommost part, the opening of the circulating rotating box body (7) is positioned right above the opening at the top part of the screw-in type long sleeve (3), and the rotating box body (7) is in a reverse buckling shape at the moment;
an optical ranging unit (10) and a resistivity unit (11) are arranged in the circulating rotating box body.
2. The active excitation type precise evaluation device for the vertical content distribution of the submarine hydrate reservoir according to claim 1, wherein: the outside of pivot (8) is fixed with two circulative rotation boxes (7), and two circulative rotation boxes (7) are through one side fixed connection that the bottom corresponds, are 180 between the bottom surface of two circulative rotation boxes (7), and the opening of two circulative rotation boxes is towards different directions respectively, and when the opening of a circulative rotation box was downward, the opening of another circulative rotation box was upwards.
3. The active excitation type precise evaluation device for the vertical content distribution of the submarine hydrate reservoir according to claim 1, wherein: the outside of pivot (8) still is fixed with four circulation and rotates box (7), and four circulation rotate the side connection that the box corresponds through the bottom, are 90 between the bottom surface of two adjacent circulation rotation boxes.
4. The active excitation type precise evaluation device for the vertical content distribution of the submarine hydrate reservoir according to claim 1, wherein: the directional guide channels (2) are arranged at intervals along the radial direction and the axial direction of the screwed-in long sleeve (3).
5. The active excitation type precise evaluation device for the vertical content distribution of the submarine hydrate reservoir according to claim 1, wherein: the optical ranging unit (10) comprises a laser emitting module and a distance side-out module, the laser emitting module comprises a laser emitter, and the laser emitter is located on the bottom surface of the circulating rotating box body.
6. The active excitation type precise evaluation device for the vertical content distribution of the submarine hydrate reservoir according to claim 1, wherein: the resistivity unit (11) is located in the circulating rotation box body and comprises two resistivity probe rods (12) fixedly connected with the bottom of the circulating rotation box body, each resistivity probe rod (12) comprises a plurality of spiral electrode modules (13), each spiral electrode module (13) comprises a cylindrical module main body (1301) and a movable spiral electrode (1302) surrounding the annular outer side of the module main body, a mounting groove and a connecting hole are formed in the module main body (1301), a lead connected with the spiral electrode is arranged in the mounting groove, a fixing rod is arranged in the connecting hole, the spiral main bodies are fixedly connected with the fixing rod, and the spiral electrode modules are arranged along the axial direction of the probe rods;
the pitch of the spiral electrode (1302) is equal to the height of the module body (1301), the top end of the spiral electrode (1302) is fixedly connected with the module body (1301), the annular side wall of the module body (1301) is provided with a sliding groove (1303) which is arranged along the axial direction, the electrode transmission fixing piece (1304) is arranged in the sliding groove (1303) in a sliding manner, the electrode transmission fixing piece (1304) in each sliding groove (1303) is fixedly connected with a transmission cable (1305), the electrode transmission fixing piece (1304) slides up and down in the sliding groove (1303) under the driving of the transmission cable (1305), the electrode transmission fixing piece (1303) is arranged at one half pitch of the spiral electrode and at the bottom end point of the spiral electrode, the electrode transmission fixing piece (1303) is fixedly connected with the spiral electrode (1302), and the deformation of the spiral electrode (1302) is controlled through the sliding of the two electrode transmission fixing pieces (1303) at the middle part and the bottom part of the spiral electrode, forming a closed ring electrode (1306).
7. The active excitation type precise evaluation device for the vertical content distribution of the submarine hydrate reservoir according to claim 1, wherein: the device also comprises a control unit which is electrically connected with the rotating shaft (8), the optical ranging unit (10), the resistivity unit (11), the temperature sensor (4) and the directional guide channel (2) respectively.
8. The active excitation type precise evaluation device for the vertical content distribution of the submarine hydrate storage according to claim 1, wherein: the thermal exciter is columnar, external threads are arranged on the outer surface of the circumference of the exciter, and the thermal exciter can be screwed in or out through the external threads.
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