1. A reservoir classification method for a compact reservoir micro-pore structure is characterized by comprising the following specific operation steps:

step 1: moving the sampling device to a specified position, and sampling the reservoir type of each depth section through the sampling device;

step 2: analyzing the sample, and obtaining an actually measured pore value and a permeability value of the sample through a pressure-covering pore permeability instrument and a pulse permeability instrument;

and step 3: observing the storage space characteristics of a reservoir, observing a fluorescent cast body slice by using a fluorescent microscope, observing a fresh section sample and an argon ion polished sample by using a field emission scanning electron microscope, analyzing the types, sizes and communication conditions of pores with different scales, and counting the surface porosity of the pores with different types;

and 4, step 4: obtaining pore structure parameters of a sample of the sample by mercury intrusion including a distribution of pore sizes of different sizes;

and 5: analyzing reservoir physical property control factors, analyzing the relationship between one or more of the parameters of pore types, sizes and communication conditions of different scales, pore size distribution of the reservoir and the like determined in the steps and the porosity and permeability of the reservoir determined in the steps, and selecting reservoir space characteristics and pore structure parameters which have great influence on the reservoir physical property;

step 6: and (4) reservoir classification, namely comprehensively evaluating the pore value and permeability value of the measured sample and other sample pore structure parameters, and finally classifying the reservoir.

2. The method for reservoir classification of tight reservoir micro-pore structure according to claim 1, wherein the sampling device in step 1 is capable of effectively preventing reservoir samples from being polluted in different reservoirs.

3. The reservoir classification method for the tight reservoir micro-pore structure according to claim 1, characterized by developing researches on characteristics or parameters such as sedimentary facies, sand body distribution and the like so as to realize reservoir macroscopic evaluation; quantitative analysis on pore structures, pore types and the like is increased, and microscopic evaluation on the reservoir is carried out; the purpose of comprehensive evaluation is achieved by analyzing the combination of the macroscopic characteristic depth and the microscopic characteristic depth of the reservoir; and (4) increasing the quantitative evaluation of the reservoir, preferably selecting the main control factor parameters of the reservoir classification, and evaluating the reservoir.

4. The reservoir classification method for the tight reservoir micro-pore structure according to claim 1, characterized in that in step 4, a high-pressure mercury porosimetry is adopted to measure pore throat parameters of a rock sample, determine pore size distribution of the reservoir and realize measurement of reservoir pore structure parameters.

5. The method for reservoir classification of tight reservoir micro-pore structure according to claim 1, characterized in that in step 6, reservoir physical property parameters are classified, and one or more combinations of reservoir pore value, permeability value and other sample pore structure parameters corresponding to different types of reservoirs are determined.

6. The reservoir classification method for the tight reservoir micro-pore structure according to claim 1, wherein the step 4 of measuring the pore throat parameters of the rock sample by a high-pressure mercury vapor method specifically comprises the following steps:

s1: preparing a rock sample into a rock core column, drying, vacuumizing to remove existing fluid and other gases in the sample, injecting mercury into a sample dilatometer, and starting to measure;

s2: before the sample dilatometer is taken out of the porosimeter, the pressure in the instrument is ensured to be reduced to atmospheric pressure, and the mercury is confirmed to have penetrated into most of the sample by observation;

s3: after the measurement is finished, obtaining a capillary pressure curve through the relation between the volume of the mercury entering and the pressure;

s4: and calculating the pore size distribution of the sample according to the capillary pressure curve.

7. A reservoir classification device of a micro-pore structure of a tight reservoir, which is applied to the reservoir classification method of the micro-pore structure of the tight reservoir in claim 1, it is characterized by comprising a sampling device, wherein the sampling device comprises a shell (1), the outer side wall of the shell (1) is fixedly provided with a control panel (5), a display screen (6) and a control button are arranged on the control panel (5), a lifting device is arranged in the shell (1), the lifting device comprises a lifting plate (9), the lifting plate (9) is arranged inside the shell (1), one side of the lifting plate (9) is in threaded connection with a first threaded rod (8), the other side of the lifting plate (9) is connected with a limiting rod (11) in a sliding mode, the top end of the first threaded rod (8) is fixedly connected with a first forward and reverse rotating motor (7), and the lower end of the lifting device is provided with a drilling device; swing joint has dodge gate (2) on the leading flank of casing (1), fixedly connected with handle (4) on the leading flank of dodge gate (2), opening (12) have been seted up at the bottom middle part of casing (1), universal wheel (3) are installed to the bottom four corners department of casing (1).

8. The reservoir classification device of the tight reservoir micro-pore structure according to claim 7, wherein the top end of the first forward and reverse rotation motor (7) is fixedly connected with the inner wall of the top end of the shell (1), the lower end of the first threaded rod (8) is rotatably connected with the bottom of the shell (1) through a bearing, the upper end and the lower end of the limiting rod (11) are fixedly connected with the inner side wall of the shell (1), and the input end of the first forward and reverse rotation motor (7) is electrically connected with the output end of the control panel (5); the lower extreme of lifter plate (9) is provided with telescopic cylinder (10), telescopic cylinder (10) and the bottom surface middle part fixed connection of lifter plate (9), the input of telescopic cylinder (10) and the output electric connection of control panel (5), the first protective housing (15) of telescopic rod bottom fixedly connected with of telescopic cylinder (10), fixed mounting has first rotating electrical machines (16) in first protective housing (15), the input of first rotating electrical machines (16) and the output electric connection of control panel (5).

9. The reservoir classification device of tight reservoir micro-pore structure, according to claim 7, characterized in that the drilling device comprises a connecting rod (13), the connecting rod (13) is fixedly connected with an output shaft at the lower end of a first rotating motor (16), a conical head (14) is fixedly connected to the bottom of the connecting rod (13), a cavity (18) is arranged at a position of the connecting rod (13) close to the lower end, a movable cover (25) is movably connected to the cavity (18), a depth sensor (22) is fixedly mounted at the lower end of the cavity (18) on the outer side wall of the connecting rod (13), and the input end of the depth sensor (22) is electrically connected with the output end of the control panel (5); the utility model discloses a portable electric cooker, including cavity (18), movable cover (25) slide to set up on the outer wall of cavity (18), the inboard fixedly connected with rack (28) of movable cover (25), the meshing has gear (29) on rack (28), the lower extreme middle part fixedly connected with driving motor (30) of gear (29), the input of driving motor (30) and the output electric connection of control panel (5).

10. The reservoir classification device of the tight reservoir microscopic pore structure according to claim 9, wherein a second forward and reverse rotation motor (17) is fixedly installed in the cavity (18), an input end of the second forward and reverse rotation motor (17) is electrically connected with an output end of the control panel (5), a second threaded rod (19) is fixedly connected to an output shaft of the second forward and reverse rotation motor (17), a movable rod (27) is connected to an outer side of the second threaded rod (19) through a thread, a limit block (21) is fixedly connected to a lower end of the movable rod (27), a limit groove (20) is formed in the surface of the cavity (18), the limit block (21) is slidably arranged in the limit groove (20), a second protective shell (23) is fixedly connected to one end of the movable rod (27) far away from the second threaded rod (19), a second rotation motor (24) is fixedly installed in the second protective shell (23), the input end of the second rotating motor (24) is electrically connected with the output end of the control panel (5), and the output shaft of the second rotating motor (24) is fixedly connected with a feeding screw rod (26).

Background

A reservoir refers to a rock formation having interconnected pores that allow hydrocarbons to be stored and percolated therein. The oil and gas reserves found in the world are mostly from sedimentary rock formations, of which sandstone and carbonate reservoirs are the most important, fractured mudstone and coal beds can also be used as reservoirs, and igneous rock and metamorphic rock reservoirs also have industrial oil and gas found therein, and the reservoir capacity of the reservoir is determined by the petrophysical properties of the reservoir, and generally comprises the porosity and the permeability of the reservoir; porosity determines the size of the reservoir storage capacity and permeability determines the permeability of the reservoir.

In order to evaluate a reservoir stratum, a scientific classification method needs to be used, a reservoir stratum sampling device used in the existing reservoir stratum classification method has more defects, the depth is inconvenient to observe when reservoir stratum with different depths are analyzed, and the sampled sample is easily polluted by reservoir stratum in different strata in the process of sampling the reservoir stratum sample, so that the reservoir stratum sample is easy to generate errors in measurement, and therefore the reservoir stratum classification method and the device with the compact reservoir stratum micro-pore structure are provided.

Disclosure of Invention

The invention aims to provide a reservoir classification method and a reservoir classification device for a micro-pore structure of a compact reservoir, which can solve the problems that the sampling of a sampling device used in the existing reservoir classification method in the background art is not fast enough, and the sample is easy to be polluted when sampling is carried out on different reservoirs.

In order to achieve the purpose, the invention provides the following technical scheme: a reservoir classification method for a compact reservoir micro-pore structure comprises the following specific operation steps:

step 1: moving the sampling device to a specified position, and sampling the reservoir type of each depth section through the sampling device;

step 2: analyzing the sample, and obtaining an actually measured pore value and a permeability value of the sample through a pressure-covering pore permeability instrument and a pulse permeability instrument;

and step 3: observing the storage space characteristics of a reservoir, observing a fluorescent cast body slice by using a fluorescent microscope, observing a fresh section sample and an argon ion polished sample by using a field emission scanning electron microscope, analyzing the types, sizes and communication conditions of pores with different scales, and counting the surface porosity of the pores with different types;

and 4, step 4: obtaining pore structure parameters of a sample of the sample by mercury intrusion including a distribution of pore sizes of different sizes;

and 5: analyzing reservoir physical property control factors, analyzing the relationship between one or more of the parameters of pore types, sizes and communication conditions of different scales, pore size distribution of the reservoir and the like determined in the steps and the porosity and permeability of the reservoir determined in the steps, and selecting reservoir space characteristics and pore structure parameters which have great influence on the reservoir physical property;

step 6: and (4) reservoir classification, namely comprehensively evaluating the pore value and permeability value of the measured sample and other sample pore structure parameters, and finally classifying the reservoir.

Furthermore, the sampling device in the step 1 can effectively prevent reservoir samples from being polluted in different reservoirs.

Furthermore, the research on characteristics or parameters such as sedimentary facies, sand body distribution and the like is carried out, so that the macroscopic evaluation of the reservoir is realized; quantitative analysis on pore structures, pore types and the like is increased, and microscopic evaluation on the reservoir is carried out; the purpose of comprehensive evaluation is achieved by analyzing the combination of the macroscopic characteristic depth and the microscopic characteristic depth of the reservoir; and (4) increasing the quantitative evaluation of the reservoir, preferably selecting the main control factor parameters of the reservoir classification, and evaluating the reservoir.

Further, in the step 4, the pore throat parameters of the rock sample are measured by adopting a high-pressure mercury porosimetry method, the pore size distribution of the reservoir is determined, and the measurement of the pore structure parameters of the reservoir is realized.

Further, in step 6, the reservoir physical property parameters are classified, and one or a combination of several of reservoir pore values, permeability values and other sample pore structure parameters corresponding to different types of reservoirs is determined.

Further, the step 4 of measuring the pore throat parameter of the rock sample by a high-pressure mercury vapor method specifically comprises the following steps:

s1: preparing a rock sample into a rock core column, drying, vacuumizing to remove existing fluid and other gases in the sample, injecting mercury into a sample dilatometer, and starting to measure;

s2: before the sample dilatometer is taken out of the porosimeter, the pressure in the instrument is ensured to be reduced to atmospheric pressure, and the mercury is confirmed to have penetrated into most of the sample by observation;

s3: after the measurement is finished, obtaining a capillary pressure curve through the relation between the volume of the mercury entering and the pressure;

s4: and calculating the pore size distribution of the sample according to the capillary pressure curve.

Furthermore, the sampling device comprises a shell, a control panel is fixedly mounted on the outer side wall of the shell, a display screen and a control button are arranged on the control panel, a lifting device is arranged in the shell and comprises a lifting plate, the lifting plate is arranged in the shell, a first threaded rod is in threaded connection with one side of the lifting plate, a limiting rod is in sliding connection with the other side of the lifting plate, a first forward and reverse rotation motor is fixedly connected to the top end of the first threaded rod, and a drilling device is arranged at the lower end of the lifting device; the portable multifunctional electric scooter is characterized in that a movable door is movably connected to the front side face of the shell, a handle is fixedly connected to the front side face of the movable door, an opening is formed in the middle of the bottom end of the shell, and universal wheels are installed at four corners of the bottom of the shell.

Furthermore, the top end of the first forward and reverse rotation motor is fixedly connected with the inner wall of the top end of the shell, the lower end of the first threaded rod is rotatably connected with the bottom of the shell through a bearing, the upper end and the lower end of the limiting rod are fixedly connected with the inner side wall of the shell, and the input end of the first forward and reverse rotation motor is electrically connected with the output end of the control panel; the lower extreme of lifter plate is provided with telescopic cylinder, telescopic cylinder and the bottom surface middle part fixed connection of lifter plate, telescopic cylinder's input and control panel's output electric connection, the first protective housing of telescopic cylinder's telescopic link bottom fixedly connected with, fixed mounting has a rotating electrical machines in the first protective housing, the input of a rotating electrical machines and control panel's output electric connection.

Further, the drilling device comprises a connecting rod, the connecting rod is fixedly connected with an output shaft at the lower end of the first rotating motor, a conical head is fixedly connected to the bottom of the connecting rod, a cavity is formed in the position, close to the lower end, of the connecting rod, a movable cover is movably connected to the cavity, a depth sensor is fixedly mounted on the outer side wall of the connecting rod at the lower end of the cavity, and the input end of the depth sensor is electrically connected with the output end of the control panel; the movable cover is arranged on the outer wall of the cavity in a sliding mode, a rack is fixedly connected to the inner side of the movable cover, a gear is meshed with the rack, a driving motor is fixedly connected to the middle of the lower end of the gear, and the input end of the driving motor is electrically connected with the output end of the control panel.

Further, fixed mounting has the second motor that is just reversing in the cavity, the input of the second motor that is just reversing and control panel's output electric connection, fixedly connected with second threaded rod on the output shaft of the second motor that is just reversing, the outside threaded connection of second threaded rod has the movable rod, the lower extreme fixedly connected with stopper of movable rod, the spacing groove has been seted up on the surface of cavity, the stopper slides and sets up at the spacing inslot, the one end fixedly connected with second protective housing of second threaded rod is kept away from to the movable rod, fixed mounting has the second rotating electrical machines in the second protective housing, the input of second rotating electrical machines and control panel's output electric connection, fixedly connected with feeding screw on the output shaft of second rotating electrical machines.

Compared with the prior art, the invention has the beneficial effects that:

1. the first positive and negative rotation motor drives the first threaded rod to rotate, the first threaded rod is in threaded connection with the lifting plate, the other side of the lifting plate is limited through the limiting rod, the lifting plate can be controlled to lift in the rotating process of the first threaded rod, the telescopic cylinder can be controlled through the control panel, the lower drilling device can be lowered to a deeper position through the telescopic cylinder, the lowering depth of the depth sensor can be displayed through the display screen on the control panel, and operation is facilitated;

2. the movable cover can drive the gear and the rack to drive through the driving motor, when the specified depth of the reservoir is reached, the movable cover is always in a closed state and is opened when sampling is needed, and the movable cover is closed again in the process of ascending the conical head, so that the reservoir samples can be effectively prevented from being polluted in different reservoirs;

3. the positive and negative motor work of control second drives the second threaded rod rotatory, and second threaded rod pivoted in-process can drive the movable rod and move, and the movable rod drives the feeding screw and wears out the cavity, drives the feeding screw through second rotating electrical machines and rotates to carry the soil sample of the different degree of depth in the cavity, thereby realize quick sample.

Drawings

Fig. 1 is a schematic overall structure diagram of a reservoir classification device for a tight reservoir micro-pore structure according to the present invention.

FIG. 2 is a cross-sectional view of a housing of the sampling device of the present invention.

Fig. 3 is an enlarged view of the invention at a in fig. 2.

Fig. 4 is an enlarged view of the invention at B in fig. 2.

Fig. 5 is a cross-sectional view of the rack and pinion of the present invention.

Fig. 6 is a schematic structural view of the lifting plate, the first threaded rod and the limiting rod of the present invention.

In the figure: 1. a housing; 2. a movable door; 3. a universal wheel; 4. a handle; 5. a control panel; 6. a display screen; 7. a first positive and negative rotation motor; 8. a first threaded rod; 9. a lifting plate; 10. a telescopic cylinder; 11. a limiting rod; 12. an opening; 13. a connecting rod; 14. a conical head; 15. a first protective case; 16. a first rotating electrical machine; 17. a second positive and negative rotation motor; 18. a cavity; 19. a second threaded rod; 20. a limiting groove; 21. a limiting block; 22. a depth sensor; 23. a second protective shell; 24. a second rotating electrical machine; 25. a movable cover; 26. a feed screw; 27. a movable rod; 28. a rack; 29. a gear; 30. the motor is driven.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

A reservoir classification method for a compact reservoir micro-pore structure comprises the following specific operation steps:

step 1: moving the sampling device to a specified position, and sampling the reservoir type of each depth section through the sampling device;

step 2: analyzing the sample, and obtaining an actually measured pore value and a permeability value of the sample through a pressure-covering pore permeability instrument and a pulse permeability instrument;

and step 3: observing the storage space characteristics of a reservoir, observing a fluorescent cast body slice by using a fluorescent microscope, observing a fresh section sample and an argon ion polished sample by using a field emission scanning electron microscope, analyzing the types, sizes and communication conditions of pores with different scales, and counting the surface porosity of the pores with different types;

and 4, step 4: obtaining pore structure parameters of a sample of the sample by mercury intrusion including a distribution of pore sizes of different sizes;

and 5: analyzing reservoir physical property control factors, analyzing the relationship between one or more of the parameters of pore types, sizes and communication conditions of different scales, pore size distribution of the reservoir and the like determined in the steps and the porosity and permeability of the reservoir determined in the steps, and selecting reservoir space characteristics and pore structure parameters which have great influence on the reservoir physical property;

step 6: and (4) reservoir classification, namely comprehensively evaluating the pore value and permeability value of the measured sample and other sample pore structure parameters, and finally classifying the reservoir.

Furthermore, the sampling device in the step 1 can effectively prevent reservoir samples from being polluted in different reservoirs.

Furthermore, the research on characteristics or parameters such as sedimentary facies, sand body distribution and the like is carried out, so that the macroscopic evaluation of the reservoir is realized; quantitative analysis on pore structures, pore types and the like is increased, and microscopic evaluation on the reservoir is carried out; the purpose of comprehensive evaluation is achieved by analyzing the combination of the macroscopic characteristic depth and the microscopic characteristic depth of the reservoir; and (4) increasing the quantitative evaluation of the reservoir, preferably selecting the main control factor parameters of the reservoir classification, and evaluating the reservoir.

Further, in the step 2, the overburden porosity and the pulse permeability of the core sample are respectively measured by the overburden porosity and the pulse permeability, the porosity and the permeability of the reservoir are determined, and the physical property characteristic analysis of the reservoir is realized.

Further, in the step 4, the pore throat parameters of the rock sample are measured by adopting a high-pressure mercury porosimetry method, the pore size distribution of the reservoir is determined, and the measurement of the pore structure parameters of the reservoir is realized.

Further, in step 6, the reservoir physical property parameters are classified, and one or a combination of several of reservoir pore values, permeability values and other sample pore structure parameters corresponding to different types of reservoirs is determined.

Further, the step 4 of measuring the pore throat parameter of the rock sample by a high-pressure mercury vapor method specifically comprises the following steps:

s1: preparing a rock sample into a rock core column, drying, vacuumizing to remove existing fluid and other gases in the sample, injecting mercury into a sample dilatometer, and starting to measure;

s2: before the sample dilatometer is taken out of the porosimeter, the pressure in the instrument is ensured to be reduced to atmospheric pressure, and the mercury is confirmed to have penetrated into most of the sample by observation;

s3: after the measurement is finished, obtaining a capillary pressure curve through the relation between the volume of the mercury entering and the pressure;

s4: and calculating the pore size distribution of the sample according to the capillary pressure curve.

Further, referring to fig. 1-6, the invention further includes a sampling device used in the reservoir classification method of the compact reservoir microscopic pore structure, which includes a housing 1, a control panel 5 is fixedly installed on the outer side wall of the housing 1, a display screen 6 and a control button are arranged on the control panel 5, a lifting device is arranged in the housing 1, the lifting device includes a lifting plate 9, the lifting plate 9 is arranged in the housing 1, a first threaded rod 8 is connected to one side of the lifting plate 9 through a thread, a limiting rod 11 is connected to the other side of the lifting plate 9 in a sliding manner, a first forward and reverse rotation motor 7 is fixedly connected to the top end of the first threaded rod 8, and a drilling device is arranged at the lower end of the lifting device;

further, a movable door 2 is movably connected to the front side surface of the shell 1, a handle 4 is fixedly connected to the front side surface of the movable door 2, an opening 12 is formed in the middle of the bottom end of the shell 1, and universal wheels 3 are mounted at four corners of the bottom of the shell 1;

furthermore, the top end of the first forward and reverse rotation motor 7 is fixedly connected with the inner wall of the top end of the shell 1, the lower end of the first threaded rod 8 is rotatably connected with the bottom of the shell 1 through a bearing, the upper end and the lower end of the limiting rod 11 are fixedly connected with the inner side wall of the shell 1, the input end of the first forward and reverse rotation motor 7 is electrically connected with the output end of the control panel 5, the first forward and reverse rotation motor 7 is controlled to work through the control panel 5, the first forward and reverse rotation motor 7 drives the first threaded rod 8 to rotate, the first threaded rod 8 is in threaded connection with the lifting plate 9, the other side of the lifting plate 9 is limited through the limiting rod 11, and the lifting plate 9 can be controlled to lift in the rotating process of the first threaded rod;

further, a telescopic cylinder 10 is arranged at the lower end of the lifting plate 9, the telescopic cylinder 10 is fixedly connected with the middle of the bottom surface of the lifting plate 9, the input end of the telescopic cylinder 10 is electrically connected with the output end of the control panel 5, a first protective shell 15 is fixedly connected with the bottom of a telescopic rod of the telescopic cylinder 10, a first rotating motor 16 is fixedly installed in the first protective shell 15, the input end of the first rotating motor 16 is electrically connected with the output end of the control panel 5, the telescopic cylinder 10 and the first rotating motor 16 can be controlled to work through the control panel 5, the telescopic cylinder 10 can enable the drilling device at the lower end to descend to a deeper place, and the first rotating motor 16 can drive the drilling device at the lower end to rotate;

further, the drilling device comprises a connecting rod 13, the connecting rod 13 is fixedly connected with an output shaft at the lower end of a first rotating motor 16, a conical head 14 is fixedly connected to the bottom of the connecting rod 13, a cavity 18 is arranged at a position, close to the lower end, of the connecting rod 13, a movable cover 25 is movably connected to the cavity 18, a depth sensor 22 is fixedly mounted at the lower end of the cavity 18 on the outer side wall of the connecting rod 13, the input end of the depth sensor 22 is electrically connected with the output end of the control panel 5, and the descending depth of the depth sensor 22 can be displayed through a display screen 6 on the control;

further, a second forward and reverse rotation motor 17 is fixedly installed in the cavity 18, an input end of the second forward and reverse rotation motor 17 is electrically connected with an output end of the control panel 5, a second threaded rod 19 is fixedly connected to an output shaft of the second forward and reverse rotation motor 17, a movable rod 27 is in threaded connection with an outer side of the second threaded rod 19, a limiting block 21 is fixedly connected to a lower end of the movable rod 27, a limiting groove 20 is formed in the surface of the cavity 18, the limiting block 21 is slidably arranged in the limiting groove 20, a second protective shell 23 is fixedly connected to one end, away from the second threaded rod 19, of the movable rod 27, a second rotation motor 24 is fixedly installed in the second protective shell 23, an input end of the second rotation motor 24 is electrically connected with an output end of the control panel 5, a feeding screw 26 is fixedly connected to an output shaft of the second rotation motor 24, and after the movable cover 25 is opened, the second forward and reverse rotation motor 17 is controlled to work to drive the second threaded rod 19 to rotate, the outer side of the second threaded rod 19 is in threaded connection with the movable rod 27, the limiting block 21 at the lower end of the movable rod 27 is limited through the limiting groove 20, the movable rod 27 can be driven to move in the rotating process of the second threaded rod 19, the movable rod 27 drives the feeding screw 26 to penetrate out of the cavity 18, the feeding screw 26 is driven to rotate through the second rotating motor 24, so that soil samples with different depths are conveyed into the cavity 18, the sampled samples are lifted into the shell 1 through the lifting device after sampling is completed, and the movable cover 25 is opened again to analyze the reservoir samples;

further, the movable cover 25 is slidably disposed on the outer wall of the cavity 18, a rack 28 is fixedly connected to the inner side of the movable cover 25, a gear 29 is engaged with the rack 28, a driving motor 30 is fixedly connected to the middle of the lower end of the gear 29, and an input end of the driving motor 30 is electrically connected to an output end of the control panel 5.

The invention has the structural characteristics and the working principle that: the first forward and reverse rotation motor 7 is controlled to work through the control panel 5, the first forward and reverse rotation motor 7 drives the first threaded rod 8 to rotate, the first threaded rod 8 is in threaded connection with the lifting plate 9, the other side of the lifting plate 9 is limited through the limiting rod 11, the lifting plate 9 can be controlled to lift in the rotating process of the first threaded rod 8, the telescopic cylinder 10 can be controlled through the control panel 5, the lower drilling device can be lowered to a deeper position through the telescopic cylinder 10, in the process that the lifting device drives the conical head 14 to descend, the first rotation motor 16 can drive the lower drilling device to rotate, the depth of the descending of the depth sensor 22 can be displayed through the display screen 6 on the control panel 5, after the conical head 14 reaches a specified depth, the movable cover 25 is opened through the driving motor 30, and the second forward and reverse rotation motor 17 is controlled to work to drive the second threaded rod 19 to rotate, outside and the movable rod 27 threaded connection of second threaded rod 19, stopper 21 of the lower extreme of movable rod 27 carries on spacingly through spacing groove 20, 19 pivoted in-process can drive movable rod 27 and move when second threaded rod, movable rod 27 drives feeding screw 26 and wears out cavity 18, drive feeding screw 26 through second rotating electrical machines 24 and rotate, thereby carry the soil sample of the different degree of depth in cavity 18, rethread elevating gear will take a sample after the sample is accomplished and rise to casing 1 in, will open movable cover 25 again and carry out the analysis to the reservoir sample.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.