Segmented water pressing test method for water-containing stratum exploration hole

Abstract

The invention discloses a water-bearing stratum exploration hole segmented water pressure test method which comprises the following steps: S1, drilling to a final hole in a test field, and designing the position of each test section; s2, assembling a test system, sleeving an upper water stop device and a lower water stop device, and putting the upper water stop device and the lower water stop device into a hole; s3, an upper packer of the upper water stop device and a lower packer of the lower water stop device are pressurized and expanded; s4, carrying out water pressure test work on the first test section; s5, pressure relief is conducted on the upper packer and the lower packer; s6, the steps S3 to S5 are repeated, and the water pressure test work is completed; s7, carrying out a merging water pressing test, and calculating a deviation coefficient; and S8, grading the water pressure test work quality based on the numerical value interval of the deviation coefficient. The upper water stopping device and the lower water stopping device can be lifted relatively to adjust the distance between the upper packer and the lower packer, so that the length and the position of a test section can be adapted, and the working efficiency of a water pressing test is improved; and through the deviation coefficient alpha, the water pressure test work quality of each test section is evaluated, and the precision of exploration work is improved.

Description

Technical Field

[0001] The invention relates to the technical field of hydrogeological exploration, and in particular to a segmented water pressure test method for a water-bearing stratum exploration hole. Background Art

[0002] In order to accurately obtain the permeability parameters of strata at different depths during geological surveys, it is necessary to conduct water pressure tests on each aquifer in sections and layers. This parameter is particularly important for hydrogeological work involving construction projects (such as groundwater curtain projects), and is directly related to the scientific and economic nature of the construction design and the effectiveness of subsequent projects.

[0003] Currently, pressure testing is primarily conducted in parallel with drilling. Test sections are typically approximately 5 meters long, using fixed-length waterstop plugs to create closed test sections. Adjacent test sections can overlap, but no sections should be missed. This approach presents several challenges: By performing drilling and pressure testing in parallel, pressure testing is completed after each section is constructed, resulting in extremely low efficiency.

[0004] Some methods use a post-hole pressure test. However, due to the fixed length of the test section, there are cases where both upper and lower plugs are located in the karst cave or fractured section. This necessitates adjusting the length of the filter pipe in the middle of the waterstop plug after it is lifted to the surface, making the pressure test extremely inefficient. Furthermore, the pressure test is conducted only once within the test section, making it difficult to assess the quality of the test. Summary of the Invention

[0005] The purpose of the present invention is to provide a segmented water pressure test method for an exploration hole in a water-bearing stratum, which can adjust the length of the test section and improve the working efficiency of the water pressure test.

[0006] To achieve the above-mentioned purpose, a method for segmented water pressure testing of an exploration hole in a water-bearing formation is provided, which comprises: S1. Drill to the final hole at the test site, design the locations of each test section according to the geological record, and record them from top to bottom as the first to the Nth test section; S2. Assemble the test system, assemble the upper and lower water stop devices of the test system, and lower them into the hole; S3. The upper packer of the upper water-stop device and the lower packer of the lower water-stop device are lowered to the upper and lower ends of the first test section respectively. The upper packer and the lower packer are pressurized and expanded to cut off the hydraulic connection between the first test section and the upper and lower aquifers. S4. Conduct a water pressure test on the closed first test section and calculate the water permeability data of the first test section; S5. Depressurizing the upper packer and the lower packer; S6. Repeat steps S3 to S5 until the water pressure test of the Nth test section is completed; S7. Conduct a combined water pressure test on the first to Nth test sections and calculate the water permeability data and deviation coefficient; S8. The quality of the water pressure test work of each test section shall be rated based on the numerical range of the deviation coefficient. The water pressure test work shall be carried out again for the test sections that fail the rating.

[0007] According to the aforementioned method for segmented water pressure testing of an exploration hole in a water-bearing formation, in S7, a combined water pressure test is conducted on the first to Nth test sections, and the water permeability and the deviation coefficient are calculated, including: S71. Sequentially divide and merge the first to Nth test segments into multiple merged test segments; each merged test segment has m consecutive test segments, and 2≤m≤5; when m=2, the end test segments in adjacent merged test segments are arranged in sequence; when m=3, 4, or 5, the end test segments in adjacent merged test segments overlap; S72. Conduct a water pressure test on the combined test sections using the test system, and calculate water permeability data for each combined test section; S73. Calculate the coefficient of deviation between each combined test segment and the test segment to which it belongs; The coefficient of deviation is calculated as follows: Where, is the coefficient of deviation; For the The water permeability measured and calculated during the separate water pressure test of the test section; For the Length of the test section; The water permeability measured and calculated during the water pressure test of the combined test section; there are m test sections in the combined test section; ≥1; For the The flow rate at the third pressure stage during the water pressure test in the test section; For the The pressure of the third pressure stage during the water pressure test in the test section.

[0008] According to the method for segmented water pressure testing of an exploration hole in a water-bearing formation, in S8, in the step of rating the quality of the water pressure testing work of each test section based on the numerical range of the deviation coefficient: When m=2, the water pressure test work quality rating of each test section in the combined test section is the same; When m=3 or 4 or 5, if the deviation coefficients calculated for the water pressure tests of adjacent combined test sections belong to different numerical ranges, the quality of the water pressure tests of the overlapping test sections in the adjacent combined test sections shall be rated with the higher rating.

[0009] According to the method for segmented water pressure testing of exploration holes in water-bearing formations, in S8, the quality of the water pressure testing work of each test section is rated as excellent, good, and poor, and a poor rating is considered unqualified; in, When <5%, the work quality rating is excellent; 5%≤ When it is less than 10%, the work quality rating is good; When it is ≥10%, the work quality is rated as poor.

[0010] According to the described method for segmented water pressure testing of an exploration hole in a water-bearing formation, the upper water-stopping device includes: a water-stopping casing; an upper packer, including a first packer and a second packer, the first packer having a first outer shell and a first capsule arranged on the outside of the first outer shell, the second packer having a second outer shell and a second capsule arranged on the inside of the second outer shell, the upper end of the first outer shell is connected to the water-stopping casing, and the lower end of the first outer shell is connected to the second outer shell, the first outer shell and the second outer shell both have a pipe-through passage running through from top to bottom, and the inner cavity of the first capsule is connected to the inner cavity of the second capsule; a first pressure pump is connected to the input end of the first pipeline, and the output end of the first pipeline is connected to the inner cavity of the first capsule.

[0011] According to the described method for segmented water pressure testing of an exploration hole in a water-bearing formation, the lower water-stopping device includes: a water pipe, located on the inner side of a water-stopping casing and passed through the pipe-passing channel, the bottom side wall of the water pipe having a water outlet; a lower packer, located below the upper packer, and including a third outer shell and a third capsule arranged on the outer side of the third outer shell, the upper end of the third outer shell being connected to the water pipe; a second pressure pump, connected to the input end of the second pipe, the second pipe being located between the water pipe and the water-stopping casing and fixedly passed through the second outer shell, the output end of the second pipe being connected to the inner cavity of the third capsule; a spring tube, sleeved on the bottom of the water pipe, the lower section of the second pipe being arranged on the inner side of the spring tube.

[0012] According to the described method for segmented water pressure testing of an exploration hole in an aquifer, in S3, in the step of pressurizing and expanding the upper and lower packers to block the hydraulic connection between the first test section and the upper and lower aquifers, the first and second capsules are pressurized to no less than 3 MPa by supplying air through the first pressure pump, and the third capsule is pressurized to no less than 3 MPa by supplying air through the second pressure pump.

[0013] According to the method for performing a segmented water pressure test on an exploration hole of a water-bearing formation, in S4, in the step of performing a water pressure test on the closed first test section, water is supplied to the water pipe by a piston pump, and the water supply volume and water pressure are recorded.

[0014] According to the method for segmented water pressure testing of an exploration hole in a water-bearing formation, in S1, in the step of drilling to the final hole at the test site, a diamond drill bit core drilling process is used to drill to the final hole.

[0015] Beneficial effects: The upper and lower water-stop devices are assembled together and can be raised and lowered relative to each other to adjust the distance between the upper and lower packers, thereby flexibly adapting the length and position of the test section. After conducting a water pressure test on a test section, the water pressure test on the next test section can be carried out without lifting the test system out of the borehole for adjustment, which can improve the work efficiency of the water pressure test. The purpose of water pressure test can be carried out quickly in any continuous test section by using the deviation coefficient , it can evaluate the quality of the water pressure test work of each test section, and identify and lock the test sections that need to be re-tested, thereby improving the accuracy of the survey work.

[0016] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments; Figure 1 Flowchart of the present invention; Figure 2 is a schematic diagram of the test system in the hole; Figure 3 Example of rating the quality of water pressure test work in a test section when m is 4. DETAILED DESCRIPTION

[0018] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it should not be understood as a limitation on the scope of protection of the present invention.

[0019] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0020] Reference Figure 1-3 A method for a segmented water pressure test of an exploration hole in a water-bearing formation comprises the following steps: S1. Drill to the final hole at the test site, design the locations of each test section according to the geological record, and record them from top to bottom as the first to the Nth test section; S2. Assemble the test system, assemble the upper and lower water stop devices of the test system, and lower them into the hole; S3. The upper packer of the upper water-stop device and the lower packer of the lower water-stop device are lowered to the upper and lower ends of the first test section respectively. The upper packer and the lower packer are pressurized and expanded to cut off the hydraulic connection between the first test section and the upper and lower aquifers. S4. Conduct a water pressure test on the closed first test section and calculate the water permeability data of the first test section; S5. Depressurizing the upper packer and the lower packer; S6. Repeat steps S3 to S5 until the water pressure test of the Nth test section is completed; S7. Conduct a combined water pressure test on the first to Nth test sections and calculate the water permeability data and deviation coefficient; S8. The quality of the water pressure test work of each test section shall be rated based on the numerical range of the deviation coefficient. The water pressure test work shall be carried out again for the test sections that fail the rating.

[0021] The test system is used to perform a plugging and water pressure test, and includes an upper water-stopping device 10 and a lower water-stopping device 20 , wherein the upper water-stopping device 10 is sleeved on the lower water-stopping device 20 . Specifically, the upper water-stop device 10 includes a water-stop sleeve 11, an upper seal, a first pressure pump 13 and a first pipeline 14. The upper seal includes a first seal 121 and a second seal 122. The first seal 121 has a first shell 1211 and a first capsule 1212 arranged on the outside of the first shell 1211. The second seal 122 has a second shell 1221 and a second capsule 1222 arranged on the inside of the second shell 1221. The upper end of the first shell 1211 is connected to the water-stop sleeve 11, and the lower end of the first shell 1211 is connected to the second shell 1221. The first shell 1211 and the second shell 1221 both have a pipe-through passage running through from top to bottom. The inner cavity of the first capsule 1212 is connected to the inner cavity of the second capsule 1222. The first pressure pump 13 is connected to the input end of the first pipeline 14, and the output end of the first pipeline 14 is connected to the inner cavity of the first capsule 1212.

[0022] The lower water stop device 20 includes a water pipe 21, a lower packer 22, a second pressure pump 23, a second pipeline 24 and a spring tube 25. The water pipe 21 is located inside the water stop sleeve 11, and the water pipe 21 is downwardly penetrated into the pipe passage. The second capsule 1222 is arranged in a ring shape around the water pipe 21. The bottom side wall of the water pipe 21 has a water outlet 211. The lower packer 22 is located below the upper packer. The lower packer 22 includes a third shell 221 and a third capsule 222 arranged outside the third shell 221. The third shell 222 is provided with a plurality of airtight seals. The upper end of 21 is connected to the water pipe 21, the second booster pump 23 is connected to the input end of the second pipe 24, the second pipe 24 is located between the water pipe 21 and the water stop sleeve 11, the second pipe 24 is downwardly penetrated into the second outer shell 1221, and the part of the second pipe 24 penetrated into the second outer shell 1221 is fixedly connected to the second outer shell 1221, the output end of the second pipe 24 is connected to the inner cavity of the third capsule 222, the spring tube 25 is sleeved on the bottom of the water pipe 21, and the lower section of the second pipe 24 is arranged on the inner side of the spring tube 25.

[0023] Through the above structure, the upper water-stop device 10 and the lower water-stop device 20 are fitted together, and the water pipe 21 can be raised and lowered relative to the water-stop sleeve 11 to adjust the distance between the upper packer and the lower packer 22, so that the length and position of the test section can be flexibly adapted. The second pipe 24 is fixedly connected to the second outer shell 1221 so that the two can be well sealed by gluing or other means to avoid water seepage and wear caused by the sliding of the second pipe 24 relative to the second outer shell 1221, thereby improving the sealing and the accuracy of the water pressure test. The lower section of the second pipe 24 is placed in the spring tube 25 so that the second pipe 24 is arranged in a spiral shape, and the second pipe 24 is tightened to avoid the second pipe 24 from scraping and contacting the hole wall. After carrying out the water pressure test of a certain test section, the water pressure test of the next test section can be carried out without taking the test system out of the borehole for adjustment, which can improve the work efficiency of the water pressure test.

[0024] In S1, in the step of drilling to the final hole at the test site, a diamond drill bit core drilling process is used to drill to the final hole at the selected test site to ensure that the hole wall is smooth and that the upper and lower packers 22 can fit tightly and seal with the hole wall after pressurization and expansion. The location of each test section is designed according to the geological catalog.

[0025] In S2, after the test system is assembled, the upper packer, the lower packer 22 and the like are lowered into the hole, and the first pressure pump 13 and the second pressure pump 23 are placed outside the hole.

[0026] In S3, the upper packer is lowered to the upper end of the test section, and the lower packer 22 is lowered to the lower end of the test section. The first pressure pump 13 delivers air to the insides of the first and second capsules 1212, 1222, and the second pressure pump 23 delivers air to the insides of the third capsule 222, respectively. The first and third capsules 1212, 222 expand outward, clinging to the borehole wall, while the second capsule 1222 expands inward, clinging to the outer wall of the water pipe 21. The upper and lower packers 22 are completely sealed, blocking the hydraulic connection between the test section and the upper and lower aquifers.

[0027] In S4, when the water pressure test is carried out on the closed first test section, water is supplied to the water pipe 21 through the piston pump 30, and the water supply volume and water pressure are recorded.

[0028] In S5 , when the upper packer and the lower packer are depressurized, the gas in the first capsule, the second capsule, and the third capsule is released, and the first capsule, the second capsule, and the third capsule are retracted.

[0029] In S6, repeat S3 to S5 to conduct water pressure tests on the second to Nth test sections, and measure the data for calculation. After the water pressure test is completed for each test section, the test system can be taken out of the hole for inspection. After confirming that the equipment is intact, the combined water pressure test can be carried out.

[0030] In S7, the steps of conducting a combined water pressure test on the first to Nth test sections and calculating the water permeability and the coefficient of deviation include: S71. Sequentially divide and merge the first to Nth test segments into multiple merged test segments; each merged test segment has m consecutive test segments, and 2≤m≤5; when m=2, the end test segments in adjacent merged test segments are arranged in sequence; when m=3, 4, or 5, the end test segments in adjacent merged test segments overlap; S72. Conduct a water pressure test on the combined test sections through the test system, and calculate water permeability data for each combined test section; S73. Calculate the coefficient of deviation between each combined test segment and the test segment to which it belongs.

[0031] The coefficient of deviation is calculated as follows: Where, is the coefficient of deviation; For the The water permeability measured and calculated during the separate water pressure test of the test section; For the Length of the test section; The water permeability measured and calculated during the water pressure test of the combined test section; there are m test sections in the combined test section; ≥1; For the The flow rate at the third pressure stage during the water pressure test in the test section; For the The pressure of the third pressure stage during the water pressure test in the test section.

[0032] Specifically, in S71, when m = 2, the end test segments of adjacent combined test segments are arranged sequentially, with each combined test segment having two test segments. For example, the first and second test segments are combined into one combined test segment, the third and fourth test segments are combined into one combined test segment, and so on for the remaining test segments. When N is an odd number, the Nth test segment can be tested independently, or the N-2th, N-1th, and Nth test segments can be combined into one combined test segment.

[0033] When m = 3, 4, or 5, the end test sections in adjacent combined test sections overlap. For example, if m = 3, the first, second, and third test sections are combined into one combined test section, the third, fourth, and fifth test sections are combined into one combined test section, the fifth, sixth, and seventh test sections are combined into one combined test section, and so on for other test sections. In this design method, the last test section at the bottom of the previous combined test section is included in the first test section at the top of the next combined test section. This test section, as the overlapping part, participates in the combined water pressure test of the two adjacent combined test sections. Among them, when N is not a multiple of 3, the last one or two test sections can be combined into one combined test section for testing.

[0034] In S72, the water pressure test on the combined test section refers to the working steps of conducting water pressure test on each test section separately.

[0035] In S73, for the deviation coefficient The calculation is based on the water permeability data calculated by the water pressure test conducted on each test section separately to calculate the theoretical water permeability data obtained by the water pressure test of each combined test section; the actual water permeability data is calculated based on the actual water pressure test conducted on the combined test section; the deviation percentage between the theoretical water permeability and the actual water permeability is calculated as the deviation coefficient It can evaluate the quality of water pressure testing conducted on each test section separately and improve the accuracy of the survey work.

[0036] Here, an example is given to illustrate the above formula: if m=4, then the first combined test section from the orifice downward belongs to the first to fourth test sections: Where, The water permeability measured and calculated during the water pressure test of the first combined test section; the first combined test section has 4 test sections; The value is 1.

[0037] In S8, based on the numerical range of the deviation coefficient, the water pressure test quality of each test section is rated as excellent, good, and poor. If the rating is poor, it is unqualified and the water pressure test needs to be repeated on the corresponding test section. Among them, the deviation coefficient is divided into three numerical ranges: When <5%, the work quality rating is excellent; 5%≤ When it is less than 10%, the work quality rating is good; When it is ≥10%, the work quality is rated as poor.

[0038] In S8, in the step of rating the work quality of the water pressure test of each test section based on the numerical range of the deviation coefficient, for different values ​​of m, the work quality rating method is as follows: When m=2, the water pressure test work quality rating of each test section in the combined test section is the same; for example, according to the deviation coefficient of 5%≤ For the interval of <10%, the water pressure test work quality of each test section in the combined test section is rated as good; When m=3, 4 or 5, if the deviation coefficients calculated for the pressure test of adjacent combined test sections belong to different numerical ranges, the pressure test quality of the overlapping test sections in the adjacent combined test sections shall be rated with the higher value, and the pressure test quality of the remaining test sections shall be rated according to the numerical range of the deviation coefficients calculated for the corresponding combined test sections; for example, if m=4, the third and seventh test sections are overlapping test sections, and the deviation coefficient calculated for the first combined test section is within the range of 5%≤ The interval of <10% is good, and the deviation coefficient calculated for the second combined test segment is The interval of ≥10% corresponds to the difference, and the deviation coefficient calculated for the second combined test segment is 5%≤ The interval of <10% corresponds to good; based on the principle of the highest, the water pressure test work quality of the first to fourth test sections are rated as good, the water pressure test work quality of the seventh to tenth test sections are rated as good, and the water pressure test work quality of the fifth and sixth test sections are rated as poor, and the fifth and sixth test sections need to be re-tested.

[0039] Based on the above processing method, when the value of m is large, the number of merged test sections can be reduced, and the number of merged water pressure tests can be reduced to reduce the workload; at the same time, when the corresponding rating of the deviation coefficient is poor, a smaller number of test sections that need to be re-tested can be locked, reducing the number of test sections that need to be re-tested and reducing the workload.

[0040] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the scope of the present invention.

Claims

1. A method for segmented water pressure testing of an exploration hole in a water-bearing formation, characterized in that: include: S1. Drill to the final hole at the test site, design the locations of each test section according to the geological record, and record them from top to bottom as the first to the Nth test section; S2. Assemble the test system, assemble the upper and lower water stop devices of the test system, and lower them into the hole; S3. The upper packer of the upper water-stop device and the lower packer of the lower water-stop device are lowered to the upper and lower ends of the first test section respectively. The upper packer and the lower packer are pressurized and expanded to cut off the hydraulic connection between the first test section and the upper and lower aquifers. S4. Conduct a water pressure test on the closed first test section and calculate the water permeability data of the first test section; S5. Depressurizing the upper packer and the lower packer; S6. Repeat steps S3 to S5 until the water pressure test of the Nth test section is completed; S7. Conduct a combined water pressure test on the first to Nth test sections and calculate the water permeability data and deviation coefficient; S8. The quality of the water pressure test work of each test section shall be rated based on the numerical range of the deviation coefficient. The water pressure test work shall be carried out again for the test sections that fail the rating.

2. A method for segmented water pressure testing of an exploration hole in a water-bearing formation according to claim 1, characterized in that: In S7, a combined water pressure test is conducted on the first to Nth test sections, and the water permeability and deviation coefficient are calculated including: S71. Sequentially divide and merge the first to Nth test segments into multiple merged test segments; each merged test segment has m consecutive test segments, and 2≤m≤5; when m=2, the end test segments in adjacent merged test segments are arranged in sequence; when m=3, 4, or 5, the end test segments in adjacent merged test segments overlap; S72. Conduct a water pressure test on the combined test sections using the test system, and calculate water permeability data for each combined test section; S73. Calculate the coefficient of deviation between each combined test segment and the test segment to which it belongs; The coefficient of deviation is calculated as follows: Where, is the coefficient of deviation; For the The water permeability measured and calculated during the separate water pressure test of the test section; For the Length of the test section; The water permeability measured and calculated during the water pressure test of the combined test section; there are m test sections in the combined test section; ≥1; For the The flow rate at the third pressure stage during the water pressure test in the test section; For the The pressure of the third pressure stage during the water pressure test in the test section.

3. A method for segmented water pressure testing of an exploration hole in a water-bearing formation according to claim 2, characterized in that: In S8, in the step of rating the quality of the water pressure test work of each test section based on the numerical range of the coefficient of deviation: When m=2, the water pressure test work quality rating of each test section in the combined test section is the same; When m=3 or 4 or 5, if the deviation coefficients calculated for the water pressure tests of adjacent combined test sections belong to different numerical ranges, the quality of the water pressure tests of the overlapping test sections in the adjacent combined test sections shall be rated with the higher rating.

4. A method for segmented water pressure testing of an exploration hole in a water-bearing formation according to claim 3, characterized in that: In S8, the quality rating of the water pressure test work in each test section is excellent, good, and poor. A rating of poor is considered unqualified; in, When <5%, the work quality rating is excellent; 5%≤ When it is less than 10%, the work quality rating is good; When it is ≥10%, the work quality is rated as poor.

5. A method for segmented water pressure testing of an exploration hole in a water-bearing formation according to any one of claims 1 to 4, characterized in that: The upper water-stop device comprises: Waterstop casing; The upper packer includes a first packer and a second packer, wherein the first packer has a first shell and a first capsule disposed outside the first shell, and the second packer has a second shell and a second capsule disposed inside the second shell, wherein the upper end of the first shell is connected to a water-stop sleeve, and the lower end of the first shell is connected to the second shell, and the first shell and the second shell both have a pipe passage extending vertically therethrough, and the inner cavity of the first capsule is connected to the inner cavity of the second capsule; The first pressure pump is connected to the input end of the first pipeline, and the output end of the first pipeline is connected to the inner cavity of the first capsule.

6. A method for segmented water pressure testing of an exploration hole in a water-bearing formation according to claim 5, characterized in that: The lower water-stop device comprises: A water pipe is located inside the water-stop sleeve and is passed through the pipe passage. The bottom side wall of the water pipe has a water opening. The lower packer is located below the upper packer and includes a third shell and a third capsule arranged outside the third shell, wherein the upper end of the third shell is connected to the water pipe; a second pressure pump connected to an input end of a second pipe, the second pipe being located between the water delivery pipe and the water stop sleeve and fixedly passing through the second housing, the output end of the second pipe being connected to the inner cavity of the third capsule; The spring tube is sleeved on the bottom of the water pipe, and the lower section of the second pipe is arranged inside the spring tube.

7. A method for segmented water pressure testing of an exploration hole in a water-bearing formation according to claim 6, characterized in that: In S3, in the step of pressurizing and expanding the upper and lower packers to block the hydraulic connection between the first test section and the upper and lower aquifers, the first and second capsules are pressurized to no less than 3 MPa by supplying air through the first pressure pump, and the third capsule is pressurized to no less than 3 MPa by supplying air through the second pressure pump.

8. A method for segmented water pressure testing of an exploration hole in a water-bearing formation according to claim 6, characterized in that: In S4, in the step of carrying out a water pressure test on the closed first test section, water is supplied to the water pipe by a piston pump, and the water supply volume and water pressure are recorded.

9. The method for segmented water pressure testing of an exploration hole in a water-bearing formation according to claim 1, characterized in that: In S1, in the step of drilling to the final hole at the test site, a diamond drill bit core drilling process is used to drill to the final hole.

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