Observation hole stratified isolation observation device and method for stratified pumping test

Abstract

The present invention provides a device and method for observing the layered isolation of observation holes in a layered pumping test, which belongs to the technical field of hydrogeological exploration. In the device for observing the layered isolation of observation holes in the layered pumping test, a mechanical seal is used for unsealing, which is more stable and firm than the unsealing method of inflation and water filling, and avoids the phenomenon of loose sealing due to leakage, etc. A geophysical well logging device is used to automatically identify the position of the waterproof layer, and then the power device and track drill rod of the surface controller are used to automatically adjust the position of the seal downhole (i.e., in the observation hole) based on the position of the waterproof layer. The device has good flexibility and intelligence, and can realize more accurate automatic positioning of the seal, thereby ensuring accurate isolation observation of the observation hole in the layered pumping test, and realizing more accurate and easy-to-operate layered isolation observation of the same-diameter observation hole.

Description

Technical Field

[0001] The invention relates to the technical field of hydrogeological exploration, and in particular to a layered isolation observation device and method for observation holes in a layered pumping test. Background Art

[0002] In hydrogeological surveys, hydrogeological tests are an indispensable technical means. Pumping test data are used to evaluate the water-richness of aquifers and determine the hydrogeological parameters of aquifers, providing a reliable basis for evaluating groundwater resources and rationally developing groundwater. At present, with the development of stratified exploration technology, more refined hydrogeological parameters can be obtained. Stratified pumping test is the most direct and effective method to obtain stratified hydrogeological parameters and finely characterize thick aquifers. Usually, due to the limitations of exploration funds and sites, only one pumping hole is drilled to carry out stratified pumping tests, such as Figure 1 The pumping hole 2, pumping pipe 1, packer 3 and submersible pump 6 shown in the middle left figure, when conducting the stratified pumping test, the pumping flow data of the pumping hole during the stratified pumping test is observed by the flow meter, and the dynamic change data of the water level of the pumping hole is observed by the water level and water temperature sensor 15, so as to obtain the drawdown data of the pumping hole. Finally, the flow data and drawdown data of the pumping hole are substituted into the Qiu Buyi formula to calculate the stratified hydrogeological parameters. In the above process, the drawdown data of the pumping hole includes well loss. When using the drawdown data of the pumping hole to calculate the stratified hydrogeological parameters, the well loss must be deducted. Because there is no direct measurement method for well loss, an indirect method is usually used to infer the well loss, which will affect the accuracy of the calculation results to a certain extent.

[0003] With the improvement of the accuracy of hydrogeological exploration, in order to avoid the problem of deducting well losses, the stratified water level drawdown data (converted from the water level dynamic change data observed by the water level and water temperature sensor) and the pumping flow data of the pumping hole can be obtained by using the stratified pumping test (generally within a few meters to tens of meters from the pumping hole, that is, when the stratified pumping test is carried out in the pumping hole, the relevant data of the observation hole are obtained) and the pumping flow data of the pumping hole are substituted into the Qiu Buyi formula to calculate the stratified hydrogeological parameters. The drawdown data of the observation hole does not contain well losses and can be directly substituted into the formula for calculation. Therefore, obtaining the drawdown data of the multi-layer water level of the observation hole is the key to improving the accuracy of the stratified hydrogeological parameters.

[0004] There are generally two traditional methods for obtaining multi-layer water level drawdown data (essentially water level dynamic change data, which can be converted into drawdown data) from observation holes: one is to drill multiple separate observation holes at different depths corresponding to different layers at different locations (such as Figure 1The observation hole shown in the right figure in the figure) is used to place water level observation equipment separately, which requires more manpower, material resources and financial resources; the other is a single-hole multi-layer observation hole. In this type of single-hole multi-layer observation hole, the aperture size is different for different layers of aquifers 4, that is, it is a single-hole multi-diameter observation hole with a more complicated structure and process. Especially when there are more than 2 layers, the aperture of the observation hole needs to be expanded as the number of layers increases, and the number of layered observation pipes needs to be increased, which increases the cost. In addition, once the well is completed, the traditional observation method has a fixed structure, and it is impossible to carry out combined observation of the observation holes of the corresponding layer section according to the pumping test of the free combination of multiple pumping holes.

[0005] At present, the layered packer devices suitable for pumping holes are mostly unsealed by inflation or water filling, which requires nitrogen bottles on the surface, etc. The operation is complicated, and the size is designed according to the pumping holes of different apertures, which is costly and not suitable for observation holes with small apertures. In addition, the unsealing by inflation or water filling may cause loose sealing due to leakage.

[0006] In the layered packer device suitable for the traditional pumping hole, the packer is fixed in the drill pipe and cannot be adjusted after being lowered into the pumping hole, which has poor flexibility;

[0007] The sealing position of traditional packers is estimated on the surface based on formation information before being lowered into the pumping hole. It has poor intelligence and low accuracy.

[0008] In summary, when the traditional observation hole stratified observation method or the use of the pumping hole stratified isolation observation device for observation hole stratified observation, there are technical problems such as loose isolation, poor flexibility, poor intelligence and low precision. How to design the observation hole stratified isolation observation device to improve its isolation reliability, flexibility, intelligence and precision has become a technical problem that needs to be solved urgently. Summary of the invention

[0009] In view of this, the purpose of the present invention is to provide a stratified isolation observation device and method for observation holes in a stratified pumping test, so as to alleviate the technical problems of loose isolation, poor flexibility, poor intelligence and low precision when the traditional observation hole stratified observation method or the existing pumping hole stratified isolation observation device is used for stratified observation of observation holes.

[0010] In a first aspect, an embodiment of the present invention provides a layered isolation observation device for an observation hole of a layered pumping test, comprising: a drill pipe, a track drill pipe, a mechanical packer, a geophysical well logging device, a water level and water temperature sensor, a surface controller, and a data collector;

[0011] The drill pipe and the track drill pipe are detachably connected, the mechanical packer is sleeved on the track drill pipe, the geophysical well logging device is arranged at the bottom of the track drill pipe at the lowest end, the water level and water temperature sensor is fixedly arranged on the drill pipe / the track drill pipe corresponding to the position of the aquifer, the data acquisition device is electrically connected to the water level and water temperature sensor, the geophysical well logging device, and the surface controller respectively, and the surface controller is also electrically connected to the mechanical packer, wherein the number of the mechanical packer and the water level and water temperature sensor is determined according to the layered structure of the formation aquifer corresponding to the layered pumping test, and the length of each detachably connected drill pipe and the track drill pipe is determined according to the layered structure of the formation aquifer;

[0012] The mechanical packer is used to seal and contact with the corresponding track drill pipe before the observation hole layered isolation observation device of the layered pumping test enters the observation hole;

[0013] The geophysical wellbore device is used to receive detection signals emitted by strata at different depths during the process of the observation hole stratified isolation observation device of the stratified pumping test entering the observation hole, and send the detection signals to the data collector, so that the data collector determines the position of each impermeable layer according to the detection signal, and sends the position of each impermeable layer to the surface controller;

[0014] The surface controller is used to send a position adjustment signal to the mechanical packer according to the position of each of the water-repellent layers;

[0015] The mechanical packer is also used for starting the sliding connection with the corresponding track drill rod according to the position adjustment signal after the observation hole layered isolation observation device of the layered pumping test enters the observation hole, and adjusting its position on the corresponding track drill rod under the control of the power device of the surface controller, and after being adjusted into place, starting the sealing contact with the corresponding track drill rod and the sealing contact with the hole wall corresponding to the water-proof layer of the observation hole according to the unsealing signal sent by the surface controller;

[0016] The water level and water temperature sensor is used to observe the water level data and water temperature data of the corresponding aquifer after the stratified isolation observation device of the observation hole of the stratified pumping test enters the observation hole, and send the water level data and the water temperature data to the data collector.

[0017] Further, the mechanical packer comprises: a plurality of first retractable brackets, a first elastic rubber ring, an expansion valve and a sealing inner ring;

[0018] The top end of the first retractable bracket supports the first elastic rubber ring, the bottom end of the first retractable bracket is in contact with and connected to the sealing inner ring, and the trigger point at the bottom end of the first retractable bracket is connected to the expansion valve through a ring line;

[0019] The expansion valve is used to control the first retractable bracket in the vertical direction of the first retractable bracket to be in a contracted state according to the unsealing signal sent by the surface controller, and control the first retractable bracket in the horizontal direction of the first retractable bracket to extend the first elastic rubber ring to the hole wall corresponding to the waterproof layer, so that the first elastic rubber ring is close to and presses the hole wall corresponding to the waterproof layer;

[0020] The sealing inner ring is used to start the sliding connection with the corresponding track drill rod according to the position adjustment signal sent by the surface controller, and to start the sealing contact with the corresponding track drill rod according to the unsealing signal sent by the surface controller.

[0021] Furthermore, the sealing inner ring includes: a plurality of second retractable brackets, a second elastic rubber ring and a spring-touch switch;

[0022] The top end of the second retractable bracket supports one side of the second elastic rubber ring, the bottom end of the second retractable bracket supports the other side of the second elastic rubber ring, and the trigger point at the bottom end of the second retractable bracket is connected to the spring switch through a ring circuit;

[0023] The spring-touch switch is used to control the second retractable bracket to be in a retracted state according to the position adjustment signal sent by the surface controller, so that the second elastic rubber ring is away from the track drill rod, thereby starting the sliding connection with the corresponding track drill rod, and to control the second retractable bracket to extend the second elastic rubber ring to the track drill rod according to the unsealing signal sent by the surface controller, so that the second elastic rubber ring is close to and presses the track drill rod, thereby starting the sealing contact with the corresponding track drill rod.

[0024] Further, the geophysical logging device includes: a natural gamma logging device;

[0025] The natural gamma logging device comprises: a detector, an amplifier and a power supply;

[0026] The detector is used to receive gamma rays emitted by strata at different depths and convert the gamma rays into electrical pulse signals;

[0027] The amplifier is used to receive the electric pulse signal sent by the detector, and amplify the electric pulse signal to obtain an amplified electric pulse signal, and then send the amplified electric pulse signal to the data collector.

[0028] Further, it also includes: a protective cover of a porous open environment structure;

[0029] The protective cover is used to cover the water level and water temperature sensor to protect the water level and water temperature sensor.

[0030] Furthermore, the electrical connection is achieved by means of a transmission cable, which includes: a steel wire and a data cable. The transmission cable is located outside the drill pipe and the track drill pipe, and is passed through the interior of the mechanical sealer. A pressure-resistant and waterproof joint is provided at the position where the transmission cable contacts the mechanical sealer.

[0031] Furthermore, after the mechanical packer is unsealed, the center position of the mechanical packer and the vertical center position of the corresponding waterproof layer are located on the same horizontal line.

[0032] Furthermore, after the mechanical seal is unsealed, the seal-in-place time of each aquifer is determined based on the dynamic change data of the water level observed by the water level and water temperature sensors, and after the seal is in place, a stratified pumping test is carried out in the pumping hole corresponding to the observation hole to obtain the dynamic change data of the water level in the observation hole based on the water level and water temperature sensors.

[0033] Furthermore, the number of mechanical packers that can be unsealed can be freely combined according to the design of the stratified pumping test.

[0034] In a second aspect, an embodiment of the present invention further provides a layered isolation observation method for an observation hole in a layered pumping test, which is applied to a layered isolation observation device for an observation hole in a layered pumping test according to any one of the first aspects, and the method comprises:

[0035] Determine the length of each detachably connected drill pipe and track drill pipe, the number of mechanical packers and water level and water temperature sensors according to the stratified aquifer layer structure corresponding to the stratified pumping test, and detachably connect the drill pipe and the track drill pipe, the mechanical packer is sleeved on the track drill pipe, the geophysical well logging device is arranged at the bottom of the track drill pipe at the bottom, the water level and water temperature sensor is fixedly arranged on the drill pipe / the track drill pipe corresponding to the position of the aquifer, the data acquisition device is electrically connected to the water level and water temperature sensor, the geophysical well logging device, and the surface controller respectively, and the surface controller is also electrically connected to the mechanical packer;

[0036] The mechanical packer is in sealing contact with the corresponding track drill pipe before the observation hole layered isolation observation device of the layered pumping test enters the observation hole;

[0037] The geophysical wellbore device receives detection signals emitted by strata at different depths during the process of the stratified isolation observation device of the observation hole of the stratified pumping test entering the observation hole, and sends the detection signals to the data collector, so that the data collector determines the position of each aquiclude according to the detection signals, and sends the position of each aquiclude to the surface controller;

[0038] The surface controller sends a position adjustment signal to the mechanical packer according to the position of each of the water-repellent layers;

[0039] After the stratified isolation observation device of the observation hole of the stratified pumping test enters the observation hole, the mechanical packer starts the sliding connection with the corresponding track drill rod according to the position adjustment signal, and adjusts its position on the corresponding track drill rod under the control of the power device of the surface controller, and after being adjusted into place, starts the sealing contact with the corresponding track drill rod and the sealing contact with the hole wall corresponding to the water-proof layer of the observation hole according to the unsealing signal sent by the surface controller;

[0040] After the stratified isolation observation device of the observation hole of the stratified pumping test enters the observation hole, the water level and water temperature sensor observes the water level data and water temperature data of the corresponding aquifer, and sends the water level data and the water temperature data to the data collector.

[0041] In an embodiment of the present invention, a layered isolation observation device for an observation hole of a layered pumping test is provided, comprising: a drill pipe, a track drill pipe, a mechanical packer, a geophysical wellbore device, a water level and temperature sensor, a surface controller and a data collector; the drill pipe and the track drill pipe are detachably connected, the mechanical packer is sleeved on the track drill pipe, the geophysical wellbore device is arranged at the bottom of the track drill pipe at the bottom end, the water level and temperature sensor is fixedly arranged on the drill pipe / track drill pipe corresponding to the position of the aquifer, the data collector is electrically connected to the water level and temperature sensor, the geophysical wellbore device and the surface controller respectively, and the surface controller is also electrically connected to the mechanical packer, wherein the number of mechanical packers and water level and temperature sensors is determined according to the layered structure of the formation aquifer corresponding to the layered pumping test, and the length of each detachably connected drill pipe and track drill pipe is determined according to the layered structure of the formation aquifer; the mechanical packer is used to seal and contact with the corresponding track drill pipe before the layered isolation observation device of the observation hole of the layered pumping test enters the observation hole; the geophysical wellbore device is used to seal and contact with the corresponding track drill pipe during the layered pumping test. During the process of the observation hole stratified isolation observation device entering the observation hole, the detection signal emitted by the strata at different depths is received, and the detection signal is sent to the data collector, so that the data collector determines the position of each impermeable layer according to the detection signal, and sends the position of each impermeable layer to the surface controller; the surface controller is used to send a position adjustment signal to the mechanical seal according to the position of each impermeable layer; the mechanical seal is also used to start the sliding connection with the corresponding track drill rod according to the position adjustment signal after the observation hole stratified isolation observation device of the stratified pumping test enters the observation hole, and adjust its position on the corresponding track drill rod under the control of the power device of the surface controller, and after the adjustment is in place, start the sealing contact with the corresponding track drill rod and the sealing contact with the hole wall corresponding to the impermeable layer of the observation hole according to the unsealing signal sent by the surface controller; the water level and water temperature sensor is used to observe the water level data and water temperature data of the corresponding aquifer after the observation hole stratified isolation observation device of the stratified pumping test enters the observation hole, and send the water level data and water temperature data to the data collector. From the above description, it can be known that in the layered isolation observation device for the observation hole of the layered pumping test of the present invention, a mechanical seal is used for unsealing, which is more stable and firm than the air-filling and water-filling unsealing methods, and avoids the phenomenon of loose sealing due to leakage, etc., and adopts a geophysical well detection device to automatically identify the position of the waterproof layer, and then the power device of the surface controller and the track drill rod are used to automatically adjust the position of the sealer downhole (i.e., in the observation hole) based on the position of the waterproof layer. It has good flexibility and intelligence, and can realize more accurate automatic positioning of the sealer, ensuring the accurate isolation observation of the observation hole of the layered pumping test, and realizing more accurate and easy-to-operate layered isolation observation of the same diameter observation hole, alleviating the technical problems of loose isolation, poor flexibility, poor intelligence and low precision when the traditional observation hole layered observation method or the existing pumping hole layered isolation observation device is used for the observation hole layered observation. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0043] Figure 1 Schematic diagram of the layered isolation observation device for the pumping hole and observation hole provided by the traditional technology;

[0044] Figure 2 A schematic diagram of the structure of a layered isolation observation device for an observation hole in a layered pumping test provided by an embodiment of the present invention;

[0045] Figure 3 A schematic cross-sectional view of a mechanical packer provided by an embodiment of the present invention;

[0046] Figure 4 A longitudinal side view of another mechanical packer provided by an embodiment of the present invention;

[0047] Figure 5 A schematic diagram of the dynamic changes of groundwater levels in various layers of an observation hole after the mechanical packer provided in an embodiment of the present invention is unsealed.

[0048] Icons: 1- pumping pipe; 2- pumping hole; 3- packer; 4- aquifer; 5- aquiclude; 6- submersible pump; 7- observation hole; 11- drill pipe; 12- track drill pipe; 13- mechanical packer; 14- geophysical well logging device; 15- water level and temperature sensor; 16- surface controller; 17- data collector; 18- transmission cable; 131- first retractable bracket; 132- first elastic rubber ring; 133- expansion valve; 134- inner sealing ring. DETAILED DESCRIPTION

[0049] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] When the traditional observation hole stratified observation method or the existing pumping hole stratified isolation observation device is used for observation hole stratified observation, there are technical problems such as loose isolation, poor flexibility, poor intelligence and low accuracy.

[0051] Based on this, in the stratified isolation observation device of the observation hole of the stratified pumping test of the present invention, a mechanical seal 13 is used for unsealing, which is more stable and firm than the air-filling and water-filling unsealing methods, and avoids the phenomenon of loose sealing due to leakage, etc., and a geophysical well logging device 14 is used to automatically identify the position of the waterproof layer 5, and then the power device of the surface controller 16 and the track drill rod 12 are used to automatically adjust the position of the seal downhole (i.e., in the observation hole) based on the position of the waterproof layer 5. It has good flexibility and intelligence, and can realize more accurate automatic positioning of the seal, thereby ensuring the accurate isolation observation of the stratified pumping test and realizing more accurate and easy-to-operate stratified isolation observation of the same diameter observation hole.

[0052] To facilitate understanding of this embodiment, a layered isolation observation device for an observation hole of a layered pumping test disclosed in an embodiment of the present invention is first introduced in detail.

[0053] Embodiment 1:

[0054] Figure 2 FIG. 1 is a schematic structural diagram of a layered isolation observation device for an observation hole in a layered pumping test according to an embodiment of the present invention. Figure 2 As shown, the observation hole stratified isolation observation device of the stratified pumping test includes: a drill pipe 11, a track drill pipe 12, a mechanical packer 13, a geophysical well logging device 14, a water level and water temperature sensor 15, a surface controller 16 and a data collector 17;

[0055] The drill pipe 11 and the track drill pipe 12 are detachably connected, the mechanical packer 13 is sleeved on the track drill pipe 12, the geophysical well logging device 14 is arranged at the bottom of the track drill pipe 12 at the bottom, the water level and water temperature sensor 15 is fixedly arranged on the drill pipe 11 / track drill pipe 12 corresponding to the position of the aquifer 4, the data acquisition device 17 is electrically connected to the water level and water temperature sensor 15, the geophysical well logging device 14, and the surface controller 16 respectively, and the surface controller 16 is also electrically connected to the mechanical packer 13, wherein the number of the mechanical packer 13 and the water level and water temperature sensor 15 is determined according to the layered structure of the formation aquifer 4 corresponding to the layered pumping test, and the length of each detachably connected drill pipe 11 and track drill pipe 12 is determined according to the layered structure of the formation aquifer 4;

[0056] The mechanical packer 13 is used to seal and contact with the corresponding track drill pipe 12 before the observation hole layer packing observation device of the layer pumping test enters the observation hole;

[0057] The geophysical well logging device 14 is used to receive detection signals emitted by strata at different depths during the process of the stratified isolation observation device of the observation hole of the stratified pumping test entering the observation hole, and send the detection signals to the data collector 17, so that the data collector 17 determines the position of each aquiclude 5 according to the detection signal, and sends the position of each aquiclude 5 to the surface controller 16;

[0058] A surface controller 16, used for sending a position adjustment signal to the mechanical packer 13 according to the position of each water-repellent layer 5;

[0059] The mechanical packer 13 is also used to start the sliding connection with the corresponding track drill rod 12 according to the position adjustment signal after the layered isolation observation device of the observation hole of the layered pumping test enters the observation hole, and adjust its position on the corresponding track drill rod 12 under the control of the power device of the surface controller 16, and after being adjusted in place, start the sealing contact with the corresponding track drill rod 12 and the sealing contact with the hole wall corresponding to the water-proof layer 5 of the observation hole according to the unsealing signal sent by the surface controller 16;

[0060] The water level and water temperature sensor 15 is used to observe the water level data and water temperature data of the corresponding aquifer 4 after the stratified isolation observation device of the observation hole of the stratified pumping test enters the observation hole, and send the water level data and water temperature data to the data collector 17.

[0061] In the embodiment of the present invention, when conducting a stratified pumping test of a thick aquifer 4 (i.e., drilling a pumping hole to conduct a stratified pumping test), according to the thickness and water-rich characteristics of the aquifer 4, the observation hole is generally selected within a range of several meters to tens of meters from the pumping hole, and the aperture of the observation hole is generally about 60 to 100 mm. According to the layered structure of the formation aquifer 4 corresponding to the layered pumping test, a layered isolation observation device for the observation hole of the layered pumping test is set, which specifically includes: the length of each detachably connected drill rod 11 and track drill rod 12 (so that after the layered isolation observation device for the observation hole of the layered pumping test enters the observation hole, the track drill rod 12 corresponds to the position of the aquifer 5, and the drill rod 11 corresponds to the position of the aquifer 4), the number of mechanical packers 13 and water level and temperature sensors 15, and the preset position range of the mechanical packers 13 on the track drill rod 12; in addition, the geophysical well logging device 14 is set at the bottom of the track drill rod 12 at the bottom, and the water level and temperature sensor 15 is fixedly set on the drill rod 11 / track drill rod 12 corresponding to the position of the aquifer 4, such as Figure 2 As shown, water level and water temperature sensors 15 are installed at the upper and lower parts of the top mechanical packer 13 (used to respectively observe the water level and water temperature data of the first aquifer (from the surface downward, the first layer, the second layer, the third layer, and so on) and the second aquifer, respectively), and other mechanical packers 13 at the bottom are only installed with water level and water temperature sensors 15 at the bottom (used to observe the water level and water temperature data of the third aquifer and the fourth aquifer in sequence). The data collector 17 is electrically connected to the water level and water temperature sensors 15, the geophysical well logging device 14, and the surface controller 16, respectively, and the surface controller 16 is also electrically connected to the mechanical packer 13.

[0062] Before the whole set of observation hole stratified isolation observation device is lowered into the observation hole, the mechanical packer 13 is in sealing contact with the corresponding track drill pipe 12 (to avoid the mechanical packer 13 sliding on the track drill pipe 12 during the process of the observation hole stratified isolation observation device entering the observation hole in the stratified pumping test), that is, the mechanical packer 13 is installed on the corresponding track drill pipe 12, and the sealing inner ring 134 of the mechanical packer 13 is in sealing contact with the corresponding track drill pipe 12.

[0063] During the process of the stratified isolation observation device of the observation hole in the stratified pumping test entering the observation hole, until entering the observation hole (i.e., the estimated position of the observation hole), the geophysical well logging device 14 receives the detection signal emitted by the strata at different positions around the observation hole (i.e., the detection signal enters the detector of the geophysical well logging device 14 from the strata (including the aquifer 4 and the aquiclude 5)), and sends the detection signal to the data collector 17, so that the data collector 17 determines the position of each aquiclude 5 according to the detection signal, and sends the position of each aquiclude 5 to the surface controller 16.

[0064] The surface controller 16 sends a position adjustment signal to the mechanical packer 13 according to the position of each waterproof layer 5. Then, the mechanical packer 13 starts the sliding connection with the corresponding track drill pipe 12 according to the position adjustment signal, and adjusts its position on the corresponding track drill pipe 12 under the control of the power device of the surface controller 16 (specifically, the power device can be a motor, the motor drives the hub to rotate, there is a rope on the hub, the other end of the rope is fixedly connected to the mechanical packer 13, under the pulling of the rope (the rope needs to be passed through the mechanical packer 13 together with the transmission cable 18, and a pressure-resistant and waterproof joint is provided at the position where the rope contacts the mechanical packer 13), the mechanical packer 13 can slide on the corresponding track drill pipe 12), and after being adjusted into place, it starts the sealing contact with the corresponding track drill pipe 12 and the sealing contact with the hole wall corresponding to the waterproof layer 5 of the observation hole according to the unsealing signal sent by the surface controller 16, thus completing the entire layered sealing process.

[0065] After the stratified isolation observation device of the observation hole of the stratified pumping test enters the observation hole, the water level and water temperature sensor 15 observes the water level data and water temperature data of the corresponding aquifer 4 and sends the water level data and water temperature data to the data collector 17.

[0066] In an embodiment of the present invention, a layered isolation observation device for an observation hole of a layered pumping test is provided, comprising: a drill pipe 11, a track drill pipe 12, a mechanical packer 13, a geophysical well logging device 14, a water level and water temperature sensor 15, a surface controller 16 and a data collector 17; the drill pipe 11 and the track drill pipe 12 are detachably connected, the mechanical packer 13 is sleeved on the track drill pipe 12, the geophysical well logging device 14 is arranged at the bottom of the track drill pipe 12 at the bottom, the water level and water temperature sensor 15 is fixedly arranged on the drill pipe 11 / track drill pipe 12 corresponding to the position of the aquifer 4, and the data collector 17 is provided. 17 is electrically connected to the water level and water temperature sensor 15, the geophysical well logging device 14, and the surface controller 16 respectively. The surface controller 16 is also electrically connected to the mechanical packer 13, wherein the number of the mechanical packers 13 and the water level and water temperature sensors 15 is determined according to the layered structure of the formation aquifer 4 corresponding to the layered pumping test, and the length of each detachably connected drill pipe 11 and track drill pipe 12 is determined according to the layered structure of the formation aquifer 4; the mechanical packer 13 is used for sealing contact with the corresponding track drill pipe 12 before the layered isolation observation device of the observation hole of the layered pumping test enters the observation hole; The well device 14 is used to receive detection signals emitted by strata at different depths during the process of the stratified isolation observation device of the observation hole of the stratified pumping test entering the observation hole, and send the detection signals to the data acquisition device 17, so that the data acquisition device 17 determines the position of each impermeable layer 5 according to the detection signals, and sends the position of each impermeable layer 5 to the surface controller 16; the surface controller 16 is used to send a position adjustment signal to the mechanical packer 13 according to the position of each impermeable layer 5; the mechanical packer 13 is also used to send a position adjustment signal to the mechanical packer 13 according to the position of each impermeable layer 5 after the stratified isolation observation device of the observation hole of the stratified pumping test enters the observation hole. The whole signal starts the sliding connection with the corresponding track drill rod 12, and adjusts its position on the corresponding track drill rod 12 under the control of the power device of the surface controller 16, and after being adjusted into place, starts the sealing contact with the corresponding track drill rod 12 and the sealing contact with the hole wall corresponding to the waterproof layer 5 of the observation hole according to the unsealing signal sent by the surface controller 16; the water level and water temperature sensor 15 is used to observe the water level data and water temperature data of the corresponding aquifer 4 after the stratified isolation observation device of the observation hole of the stratified pumping test enters the observation hole, and sends the water level data and water temperature data to the data collector 17.From the above description, it can be seen that in the layered isolation observation device of the observation hole of the layered pumping test of the present invention, the mechanical seal 13 is used for unsealing, which is more stable and firm than the inflation and water filling unsealing methods, and avoids the phenomenon of loose sealing due to leakage, etc., and adopts the geophysical well detection device 14 to automatically identify the position of the waterproof layer 5, and then based on the position of the waterproof layer 5, the power device of the surface controller 16 and the track drill rod 12 are used to automatically adjust the position of the seal downhole (i.e. in the observation hole). It has good flexibility and intelligence, and can realize more accurate automatic positioning of the seal position, ensuring the accurate isolation observation of the layered pumping test, and realizing more accurate and easy-to-operate layered isolation observation of the same diameter observation hole, which alleviates the technical problems of loose isolation, poor flexibility, poor intelligence and low precision when the traditional observation hole layered observation method or the existing pumping hole layered isolation observation device is used for the observation hole layered observation.

[0067] The above content briefly introduces the observation hole layered isolation observation device for the layered pumping test of the present invention, and the specific contents involved are described in detail below.

[0068] In an optional embodiment of the present invention, Figure 3 and Figure 4 As shown, the mechanical packer 13 includes: a plurality of first retractable brackets 131, a first elastic rubber ring 132, an expansion valve 133 and a sealing inner ring 134;

[0069] The top end of the first retractable bracket 131 supports the first elastic rubber ring 132, the bottom end of the first retractable bracket 131 is in contact with and connected to the sealing inner ring 134, and the trigger point at the bottom end of the first retractable bracket 131 is connected to the expansion valve 133 through a ring line;

[0070] The expansion valve 133 is used to control the vertical first retractable bracket 131 in the first retractable bracket 131 to be in a contracted state according to the unsealing signal sent by the surface controller 16, and control the horizontal first retractable bracket 131 in the first retractable bracket 131 to extend the first elastic rubber ring 132 to the hole wall corresponding to the waterproof layer 5, so that the first elastic rubber ring 132 is close to and presses the hole wall corresponding to the waterproof layer 5;

[0071] The sealing inner ring 134 is used to start the sliding connection with the corresponding track drill rod 12 according to the position adjustment signal sent by the surface controller 16, and to start the sealing contact with the corresponding track drill rod 12 according to the unsealing signal sent by the surface controller 16.

[0072] Specifically, the bottom end of the first retractable bracket 131 is in contact with the second elastic rubber ring of the sealing inner ring 134 . In addition, the expansion valve 133 is provided with an expansion switch and a battery. The expansion switch is electrically connected to the surface controller 16 for controlling the extension and retraction state of the first retractable bracket 131 .

[0073] After accurate positioning (i.e., after adjustment in place), an unsealing signal is sent through the surface controller 16, and the unsealing signal is transmitted to the expansion valve 133 through the transmission cable 18. Specifically, the expansion switch of the expansion valve 133 is arranged at the bottom end of the first retractable bracket 131, and the expansion switch is connected to the surface controller 16 through the transmission cable 18. The surface controller 16 sends an unsealing signal to trigger the expansion switch through the transmission cable 18, so that the vertical first retractable bracket 131 is in a contracted state, and the horizontal first retractable bracket 131 is in a state of extending to the first elastic rubber ring 132 around and pressing the hole wall of the observation hole.

[0074] In an optional embodiment of the present invention, the sealing inner ring 134 includes: a plurality of second retractable brackets, a second elastic rubber ring and a spring-touch switch (the specific structure of the sealing inner ring 134 is not shown in the figure);

[0075] The top end of the second retractable bracket supports one side of the second elastic rubber ring, the bottom end of the second retractable bracket supports the other side of the second elastic rubber ring, and the trigger point at the bottom end of the second retractable bracket is connected to the spring switch through a ring circuit;

[0076] The spring-touch switch is used to control the second retractable bracket to be in a retracted state according to a position adjustment signal sent by the surface controller 16, so that the second elastic rubber ring is away from the track drill rod 12, thereby starting the sliding connection with the corresponding track drill rod 12, and, according to the unsealing signal sent by the surface controller 16, control the second retractable bracket to extend the second elastic rubber ring to the track drill rod 12, so that the second elastic rubber ring is close to and presses the track drill rod 12, thereby starting the sealing contact with the corresponding track drill rod 12.

[0077] Specifically, in order to ensure tightness of the seal, a sealing suction cup is provided on one side of the second elastic rubber ring in sealing contact with the track drill rod 12 to achieve sealing contact with the track drill rod 12 .

[0078] In an optional embodiment of the present invention, the geophysical logging device 14 includes: a natural gamma logging device;

[0079] The natural gamma logging device includes: a detector, an amplifier and a power supply;

[0080] A detector, used to receive gamma rays emitted by strata at different depths and convert the gamma rays into electrical pulse signals;

[0081] The amplifier is used to receive the electric pulse signal sent by the detector, and amplify the electric pulse signal to obtain an amplified electric pulse signal, and then send the amplified electric pulse signal to the data collector 17.

[0082] Specifically, the data collector 17 is provided with a data acquisition, logging data interpretation and analysis module, a battery and a storage module. The logging data interpretation and analysis module interprets and processes the received amplified electrical pulse signal to obtain the position of the aquiclude 5 .

[0083] In an optional embodiment of the present invention, it further comprises: a protective cover of a porous open environment structure;

[0084] The protective cover is used to cover the water level and water temperature sensor 15 to protect the water level and water temperature sensor 15 .

[0085] In an optional embodiment of the present invention, the electrical connection is achieved by means of a transmission cable 18, which includes: a steel wire and a data cable. The transmission cable 18 is located outside the drill pipe 11 and the track drill pipe 12, and is passed through the interior of the mechanical packer 13. A pressure-resistant and waterproof joint is provided at the position where the transmission cable 18 contacts the mechanical packer 13, which is used to seal the mechanical packer 13.

[0086] In an optional embodiment of the present invention, after the mechanical packer 13 is unsealed, the center position of the mechanical packer 13 and the vertical center position of the corresponding waterproof layer 5 are located on the same horizontal line to achieve the best sealing effect.

[0087] In an optional embodiment of the present invention, after the mechanical seal 13 is unsealed, the seal-in-place time of each aquifer 4 is determined based on the dynamic change data of the water level observed by the water level and water temperature sensor 15, and after the seal is in place, a stratified pumping test is carried out in the pumping hole corresponding to the observation hole to obtain the dynamic change data of the water level in the observation hole based on the water level and water temperature sensor 15.

[0088] Specifically, after the mechanical packer 13 is unsealed, the sealing time of each aquifer 4 is determined according to the dynamic change data of the water level observed by the water level and water temperature sensor 15 (e.g. Figure 5 As shown in the figure, after the mechanical packer 13 is unsealed, the groundwater level of each layer of the observation hole changes dynamically. After the packer is in place, the stratified pumping test can be started, and the groundwater level change process of multiple layers during the stratified pumping test can be accurately obtained (i.e., the dynamic change data of the water level of the observation hole during the stratified pumping test). Compared with the previous packing technology, the packing time needs to be estimated based on previous work experience, and the time when the packing is in place cannot be accurately grasped. Generally, it is necessary to extend the time to ensure that the packing is in place. The process of the present invention greatly improves the observation efficiency and saves the observation time.

[0089] In an optional embodiment of the present invention, the number of mechanical packers 13 to be unsealed can be freely combined according to the design of the stratified pumping test.

[0090] Specifically, if the design of the stratified pumping test is to pump water from the first aquifer and monitor the dynamic changes of the water level of the first aquifer in the observation hole, then the first mechanical packer 13 below the ground is unsealed, and the other mechanical packers 13 do not need to be unsealed; if the design of the stratified pumping test is to pump water from the second aquifer and monitor the dynamic changes of the water level of the second aquifer in the observation hole, then the first mechanical packer 13 and the second mechanical packer 13 below the ground are unsealed, and the other mechanical packers 13 do not need to be unsealed; if the design of the stratified pumping test is to pump water from the second aquifer and monitor the dynamic changes of the water level of the second aquifer in the observation hole, then the first mechanical packer 13 and the second mechanical packer 13 below the ground are unsealed, and the other mechanical packers 13 do not need to be unsealed; The design of the pumping test is to carry out mixed pumping of the first aquifer and the second aquifer and monitor the dynamic changes of the mixed water level of the first aquifer and the second aquifer in the observation hole. In this case, the second mechanical packer 13 below the ground is unsealed, and the other mechanical packers 13 do not need to be unsealed. If the stratified pumping test design is to carry out a pumping test on a certain aquifer and observe the other layers in layers, the mechanical packers 13 corresponding to each aquifer 5 need to be unsealed, that is, the number of mechanical packers 13 to be unsealed can be freely combined according to the design of the stratified pumping test.

[0091] The following is a description of the use of the observation hole layer isolation observation device for the layered pumping test:

[0092] First, use the information of the aquifer 4 to design an observation hole with the same layered structure as the pumping hole. Specifically, the pumping hole and the observation hole have the same wellbore depth, the same aquiclude position, and the observation hole diameter is smaller than the pumping hole diameter, such as the pumping hole diameter is 325 mm and the observation hole diameter is 100 mm. Before the stratified pumping test begins, place the stratified isolation observation device of the observation hole for the stratified pumping test into the observation hole. Pay special attention to the fact that the center position of the mechanical packer 13 and the vertical center position of the corresponding aquiclude 5 are on the same horizontal line. The water level and water temperature sensor 15 is used to observe and record the water level and water temperature changes of the observation hole in the stratified pumping test, and transmit them to the surface data collector 17 in real time by the transmission cable 18. The number of mechanical packers 13 and water level and water temperature sensors 15 is determined according to the design of the stratified pumping test. After the observation hole layered isolation observation device of the layered pumping test is adjusted in place according to the position of the water-blocking layer fed back by the detection signal, the expansion valve 133 is started, so that the vertical first retractable bracket 131 in the mechanical cavity of the mechanical packer 13 is contracted, the horizontal first retractable bracket 131 is extended to the first elastic rubber ring 132 to press the wall of the observation hole, and the sealing inner ring 134 starts the sealing contact with the track drill pipe 12. The water level and water temperature sensors 15 at different layers will obtain the dynamic change data of the water level and water temperature of the observation holes at different layers during the layered pumping experiment, and calculate the hydrogeological parameters in combination with the flow data of the layered pumping test of the pumping hole. According to the layered section combined pumping test of the pumping hole, a same-diameter observation hole can cooperate with the free combination test of multiple layers of the pumping hole to carry out data observation. After the test, the surface controller 16 is used to issue a command to close the expansion valve 133, so that the vertical first retractable bracket 131 in the mechanical cavity is extended and the horizontal first retractable bracket 131 is contracted. Then, the stratified isolation observation device of the observation hole for extracting the stratified pumping test is connected with the drill rig and the drill rod 11. The device and method can provide technical support for further obtaining hydrogeological parameter research that can more finely characterize the characteristics of thick aquifers.

[0093] In order to cooperate with the stratified hydrogeological survey and improve the accuracy of hydrogeological parameters, the inventor designed a stratified isolation observation device for observation holes in stratified pumping tests, which is especially suitable for stratified exploration and pumping tests of thick aquifers. The observation holes are observed in multiple layers, and the monitoring data of stratified sections can be arbitrarily combined. With the improvement of the accuracy of hydrogeological surveys, the understanding of aquifers is gradually refined and deepened. It is very necessary to actually measure the depth of stratified water level drop in observation holes to improve the accuracy of hydrogeological parameters. Compared with traditional observation methods, it can not only greatly reduce construction and material costs, but also has good stability and is easy to operate. It can accurately judge the time when each layer of the observation hole is sealed in place, and can ensure the acquisition of more accurate stratified water level changes in the observation hole during the pumping test, which improves the intelligence of the whole set of equipment and provides technical support for further obtaining more accurate hydrogeological parameters.

[0094] The device of the present invention can obtain groundwater level data of different layers of the observation hole, and can monitor the dynamic changes of water level and water temperature in each layer of the observation hole in real time during the pumping process, monitor the water level drop value corresponding to different flow rates, and provide technical support for further calculation and acquisition of accurate stratified hydrogeological parameters. The device and method can improve the accuracy of hydrogeological exploration, and natural gamma logging can accurately identify the position of the aquiclude in the formation, which is particularly suitable for stratified monitoring of bedrock bare holes. The well drilling of thick loose aquifers requires a wall protection pipe, which will have a certain interference with the natural gamma signal of the formation. It can be combined with the comprehensive geophysical logging method to judge, providing technical support for the stratified exploration of hydrogeological parameters.

[0095] The stratified isolation observation device for observation holes of the stratified pumping test of the present invention is suitable for application in areas with multiple aquifers. It can accurately obtain the dynamic change data of water level and water temperature at each layer of the observation hole, and analyze it together with the flow data in the wellbore at the corresponding layer to carry out hydrogeological parameter research, thereby greatly improving the calculation accuracy of hydrogeological parameters in stratified exploration.

[0096] The present invention has the following significant advantages: 1. It can realize the observation of multiple water level and water temperature data in one observation hole with the same diameter, thus overcoming the high-cost construction defects of the existing construction of multiple observation holes and one hole with multiple diameters; 2. In the application field of hydrogeological exploration, it is the first time to use mechanical isolation of aquifers to observe data, thus avoiding the defects of complicated procedures of inflation and water-filled packers in the past, such as air leakage and poor sealing; 3. Through the geophysical well logging device 14 and the track drill pipe 12, the position of the aquiclude is accurately located underground, and the position of the packer is automatically adjusted underground, thus avoiding the problems of inaccurate positioning of the packer estimated on the surface; 4. In conjunction with the current stratified pumping test, the water level data of each layer of the observation hole without well damage is obtained, so that more accurate stratified hydrogeological parameters can be obtained, providing a scientific basis for groundwater resource evaluation and optimal allocation of water resources.

[0097] Embodiment 2:

[0098] The embodiment of the present invention further provides a layered isolation observation method for an observation hole in a layered pumping test, which is applied to the layered isolation observation device for the observation hole in the layered pumping test in the first embodiment above. The method comprises:

[0099] Step S1, according to the layered structure of the formation aquifer corresponding to the layered pumping test, the length of each detachably connected drill pipe and track drill pipe, the number of mechanical packers and water level and temperature sensors are determined, and the drill pipe and track drill pipe are detachably connected, the mechanical packer is sleeved on the track drill pipe, the geophysical well logging device is set at the bottom of the track drill pipe at the bottom, the water level and temperature sensor is fixedly set on the drill pipe / track drill pipe corresponding to the position of the aquifer, the data acquisition device is electrically connected to the water level and temperature sensor, the geophysical well logging device, and the surface controller respectively, and the surface controller is also electrically connected to the mechanical packer;

[0100] Step S2, before the stratified isolation observation device of the observation hole of the stratified pumping test enters the observation hole, the mechanical packer is in sealing contact with the corresponding track drill pipe;

[0101] Step S3, when the stratified isolation observation device of the observation hole of the stratified pumping test enters the observation hole, the geophysical well logging device receives the detection signals emitted by the strata at different depths, and sends the detection signals to the data collector, so that the data collector determines the position of each aquiclude according to the detection signals, and sends the position of each aquiclude to the surface controller;

[0102] Step S4, the surface controller sends a position adjustment signal to the mechanical packer according to the position of each water-repellent layer;

[0103] Step S5, after the mechanical packer enters the observation hole of the stratified pumping test, the stratified isolation observation device starts the sliding connection with the corresponding track drill rod according to the position adjustment signal, and adjusts its position on the corresponding track drill rod under the control of the power device of the surface controller, and after the adjustment is in place, starts the sealing contact with the corresponding track drill rod and the sealing contact with the hole wall corresponding to the water-proof layer of the observation hole according to the unsealing signal sent by the surface controller;

[0104] Step S5, after the stratified isolation observation device of the observation hole of the stratified pumping test enters the observation hole, the water level and water temperature sensor observes the water level data and water temperature data of the corresponding aquifer, and sends the water level data and water temperature data to the data collector.

[0105] In addition, in the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0106] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc., which can store program codes.

[0107] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0108] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A layered isolation observation device for observation holes in a layered pumping test, characterized in that: include: Drill pipe, track drill pipe, mechanical packer, geophysical well logging device, water level and temperature sensor, surface controller and data collector; The drill pipe and the track drill pipe are detachably connected, the mechanical packer is sleeved on the track drill pipe, the geophysical well logging device is arranged at the bottom of the track drill pipe at the lowest end, the water level and water temperature sensor is fixedly arranged on the drill pipe / the track drill pipe corresponding to the position of the aquifer, the data acquisition device is electrically connected to the water level and water temperature sensor, the geophysical well logging device, and the surface controller respectively, and the surface controller is also electrically connected to the mechanical packer, wherein the number of the mechanical packer and the water level and water temperature sensor is determined according to the layered structure of the formation aquifer corresponding to the layered pumping test, and the length of each detachably connected drill pipe and the track drill pipe is determined according to the layered structure of the formation aquifer; The mechanical packer is used to seal and contact with the corresponding track drill pipe before the observation hole layered isolation observation device of the layered pumping test enters the observation hole; The geophysical wellbore device is used to receive detection signals emitted by strata at different depths during the process of the observation hole stratified isolation observation device of the stratified pumping test entering the observation hole, and send the detection signals to the data collector, so that the data collector determines the position of each impermeable layer according to the detection signal, and sends the position of each impermeable layer to the surface controller; The surface controller is used to send a position adjustment signal to the mechanical packer according to the position of each of the water-repellent layers; The mechanical packer is also used for starting the sliding connection with the corresponding track drill rod according to the position adjustment signal after the observation hole layered isolation observation device of the layered pumping test enters the observation hole, and adjusting its position on the corresponding track drill rod under the control of the power device of the surface controller, and after being adjusted into place, starting the sealing contact with the corresponding track drill rod and the sealing contact with the hole wall corresponding to the water-proof layer of the observation hole according to the unsealing signal sent by the surface controller; The water level and water temperature sensor is used to observe the water level data and water temperature data of the corresponding aquifer after the stratified isolation observation device of the observation hole of the stratified pumping test enters the observation hole, and send the water level data and the water temperature data to the data collector.

2. The observation hole layer isolation observation device according to claim 1, characterized in that: The mechanical packer comprises: a plurality of first retractable brackets, a first elastic rubber ring, an expansion valve and a sealing inner ring; The top end of the first retractable bracket supports the first elastic rubber ring, the bottom end of the first retractable bracket is in contact with and connected to the sealing inner ring, and the trigger point at the bottom end of the first retractable bracket is connected to the expansion valve through a ring line; The expansion valve is used to control the first retractable bracket in the vertical direction of the first retractable bracket to be in a contracted state according to the unsealing signal sent by the surface controller, and control the first retractable bracket in the horizontal direction of the first retractable bracket to extend the first elastic rubber ring to the hole wall corresponding to the waterproof layer, so that the first elastic rubber ring is close to and presses the hole wall corresponding to the waterproof layer; The sealing inner ring is used to start the sliding connection with the corresponding track drill rod according to the position adjustment signal sent by the surface controller, and to start the sealing contact with the corresponding track drill rod according to the unsealing signal sent by the surface controller.

3. The observation hole layer isolation observation device according to claim 2, characterized in that: The sealing inner ring comprises: a plurality of second retractable brackets, a second elastic rubber ring and a spring-touch switch; The top end of the second retractable bracket supports one side of the second elastic rubber ring, the bottom end of the second retractable bracket supports the other side of the second elastic rubber ring, and the trigger point at the bottom end of the second retractable bracket is connected to the spring switch through a ring circuit; The spring-touch switch is used to control the second retractable bracket to be in a retracted state according to the position adjustment signal sent by the surface controller, so that the second elastic rubber ring is away from the track drill rod, thereby starting the sliding connection with the corresponding track drill rod, and to control the second retractable bracket to extend the second elastic rubber ring to the track drill rod according to the unsealing signal sent by the surface controller, so that the second elastic rubber ring is close to and presses the track drill rod, thereby starting the sealing contact with the corresponding track drill rod.

4. The observation hole layer isolation observation device according to claim 1, characterized in that: The geophysical logging device comprises: a natural gamma logging device; The natural gamma logging device comprises: a detector, an amplifier and a power supply; The detector is used to receive gamma rays emitted by strata at different depths and convert the gamma rays into electrical pulse signals; The amplifier is used to receive the electric pulse signal sent by the detector, and amplify the electric pulse signal to obtain an amplified electric pulse signal, and then send the amplified electric pulse signal to the data collector.

5. The observation hole layer isolation observation device according to claim 1, characterized in that: Also includes: Protective cover of porous open environment structure; The protective cover is used to cover the water level and water temperature sensor to protect the water level and water temperature sensor.

6. The observation hole layer isolation observation device according to claim 1, characterized in that: The electrical connection is achieved by means of a transmission cable, which includes: a steel wire and a data cable. The transmission cable is located outside the drill pipe and the track drill pipe, and is passed through the interior of the mechanical packer. A pressure-resistant and waterproof joint is provided at the position where the transmission cable contacts the mechanical packer.

7. The observation hole layer isolation observation device according to claim 1, characterized in that: After the mechanical packer is unsealed, the center position of the mechanical packer and the vertical center position of the corresponding waterproof layer are located on the same horizontal line.

8. The observation hole layer isolation observation device according to claim 1, characterized in that: After the mechanical seal is unsealed, the seal-in-place time of each aquifer is determined based on the dynamic water level change data observed by the water level and water temperature sensors. After the seal is in place, a stratified pumping test is carried out in the pumping hole corresponding to the observation hole to obtain the dynamic water level change data of the observation hole based on the water level and water temperature sensors.

9. The observation hole layer isolation observation device according to claim 1, characterized in that: The number of mechanical packers that can be unsealed can be freely combined according to the design of the stratified pumping test.

10. A layered isolation observation method for observation holes in a layered pumping test, characterized in that: An observation hole stratified isolation observation device applied to a stratified pumping test according to any one of claims 1 to 9, the method comprising: Determine the length of each detachably connected drill pipe and track drill pipe, the number of mechanical packers and water level and water temperature sensors according to the stratified aquifer layer structure corresponding to the stratified pumping test, and detachably connect the drill pipe and the track drill pipe, the mechanical packer is sleeved on the track drill pipe, the geophysical well logging device is arranged at the bottom of the track drill pipe at the bottom, the water level and water temperature sensor is fixedly arranged on the drill pipe / the track drill pipe corresponding to the position of the aquifer, the data acquisition device is electrically connected to the water level and water temperature sensor, the geophysical well logging device, and the surface controller respectively, and the surface controller is also electrically connected to the mechanical packer; The mechanical packer is in sealing contact with the corresponding track drill pipe before the observation hole layered isolation observation device of the layered pumping test enters the observation hole; The geophysical wellbore device receives detection signals emitted by strata at different depths during the process of the stratified isolation observation device of the observation hole of the stratified pumping test entering the observation hole, and sends the detection signals to the data collector, so that the data collector determines the position of each aquiclude according to the detection signals, and sends the position of each aquiclude to the surface controller; The surface controller sends a position adjustment signal to the mechanical packer according to the position of each of the water-repellent layers; After the stratified isolation observation device of the observation hole of the stratified pumping test enters the observation hole, the mechanical packer starts the sliding connection with the corresponding track drill rod according to the position adjustment signal, and adjusts its position on the corresponding track drill rod under the control of the power device of the surface controller, and after being adjusted into place, starts the sealing contact with the corresponding track drill rod and the sealing contact with the hole wall corresponding to the water-proof layer of the observation hole according to the unsealing signal sent by the surface controller; After the stratified isolation observation device of the observation hole of the stratified pumping test enters the observation hole, the water level and water temperature sensor observes the water level data and water temperature data of the corresponding aquifer, and sends the water level data and the water temperature data to the data collector.

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