Stratum occurrence determination method based on while-drilling parameters and computer readable storage medium

Abstract

The invention discloses a stratum attitude determination method based on parameters while drilling and a computer readable storage medium, belongs to the technical field of geological exploration, and is particularly suitable for rapid attitude determination of a specified layer in site selection investigation of an underground powerhouse of a pumped storage power station. The method comprises the following steps of: constructing a hole site boundary by taking a dot site as a circle center and a length R as a radius, selecting n second point sites on the circumference of the hole site boundary, and converting dip angle measurement of a local regional deep stratum into a geometric calculation problem on a plane by utilizing a principle that three points form a plane, accurate measurement of the inclination angle can be completed by using drilling parameter depth and ground radius data, the cost is low, the efficiency is high, and the method is not limited by geological conditions and drilling quality.

Description

Technical Field

[0001] The present invention belongs to the field of geological exploration technology, and specifically relates to a method for determining the occurrence of a stratum based on drilling parameters and a computer-readable storage medium, which is particularly suitable for quickly and accurately determining the occurrence of a specified layer in the survey of an underground powerhouse of a pumped storage power station. Background Art

[0002] In recent years, with the increasing demand for renewable energy, pumped-storage power stations have flourished in my country. The construction of a pumped-storage power station is a massively expensive undertaking, often costing billions of yuan. Once a site is selected, it cannot be adjusted. Therefore, the site selection of underground structures, including underground powerhouses, is a key survey during the early stages of pumped-storage power station construction and a crucial component of the subsequent underground powerhouse stability assessment.

[0003] The site selection of underground structures involves many geological factors such as stratum position, stratum lithology, stratum stability, and stratum occurrence. Among them, the accurate determination of stratum inclination is the top priority of geological survey.

[0004] In the field of geological structure, the commonly used methods for determining stratum dip are surface outcrop observation and borehole coring. The surface outcrop observation method relies on the exposed conditions of the stratum, and the surface weathering causes the measurement results to be unable to reflect the true occurrence of deep strata, and the regional representativeness is poor (the error is generally >15%). The borehole coring method has a damage rate of up to 30%-50% of the core structure surface (weak rock formations), which leads to distortion of the occurrence data. Regional measurements require dense drilling (spacing ≤50m), and the cost of a single hole is as high as several thousand yuan, which increases the cost of a single project by more than 2 million yuan. It is impossible to obtain stratum interface data in real time, and later core compilation is required, which prolongs the construction period by 40%-60%. Borehole wall imaging: The measurement results of single holes are inaccurate, and the cost of linked hole measurements is too high.

[0005] Although measurement while drilling technology is mature and can carry out low-cost drilling measurement operations and obtain high-quality parameter data, this field lacks a technical solution that combines the measurement while drilling parameters with local regional geological occurrence calculations, resulting in low efficiency in underground structure site selection and investigation. Summary of the Invention

[0006] In order to solve the above technical problems, the present invention proposes a method for determining the occurrence of formations based on drilling parameters and a computer-readable storage medium. The principle of three points forming a surface is used to convert the inclination measurement of local regional deep formations into a geometric calculation problem on a plane. The accurate measurement of the inclination can be completed using the drilling parameter depth and ground radius data. It has low cost and high efficiency and is not limited by geological conditions and drilling quality.

[0007] The present invention is implemented as follows: a method for determining formation occurrence based on while-drilling parameters, comprising the following steps:

[0008] Step 1: Set a dot position at the highest point of the target area to be measured, build a support platform at the same height as the dot position, and set the hole position boundary on the support platform with the dot position Zk0 as the center and the length r as the radius;

[0009] Step 2: n drilling points are set sequentially and equidistantly on the circumference of the hole boundary, where n ≥ 3;

[0010] Step 3: Use a drilling rig equipped with a drilling process monitoring system to vertically drill toward the target formation along a self-supporting platform at n drilling points, obtain while-drilling parameter values, and sequence the target formation. Based on the sequence division results of the target formation, determine the designated layer whose occurrence is to be measured;

[0011] Step 4: extract the drilling depths of the designated layers corresponding to the n drilling points according to the drilling parameters. The drilling depth of the designated layer is equal to the absolute value of the height difference between the support platform and the upper interface of the designated layer.

[0012] Step 5: Calculate the inclination angle θ of the designated layer in the target stratum using a mathematical calculation formula between the inclination angle θ and the drilling depth and length r of the designated layer corresponding to the n drilling points.

[0013] Furthermore, n=3, specifically including:

[0014] Step 2: Set three drilling points, namely, the first point Zk1, the second point Zk2, and the third point Zk3, at intervals of 120° on the circumference of the hole boundary.

[0015] Step 3: Use a drilling rig equipped with a drilling process monitoring system to vertically drill toward the target formation along the self-supporting platform at three drilling points, obtain the drilling parameters, and sequence the target formation. Based on the sequence division results of the target formation, determine the designated layer to be measured;

[0016] Step 4: According to the drilling parameters, the drilling depth H1 of the first point Zk1 corresponding to the specified layer, the drilling depth H2 of the second point Zk2 corresponding to the specified layer, and the drilling depth H3 of the third point Zk3 corresponding to the specified layer are extracted. The drilling depth of the specified layer is equal to the absolute value of the height difference between the support platform and the upper interface of the specified layer. Step 5: Using the formula Calculate the dip angle θ of a specified layer in the target formation.

[0017] Furthermore, n=4, specifically including:

[0018] Step 2: Set four drilling points, namely, the first point Zk1, the second point Zk2, the third point Zk3, and the fourth point Zk4, at intervals of 90° on the circumference of the hole boundary.

[0019] Step 3: Use a drilling rig equipped with a drilling process monitoring system to vertically drill toward the target formation along the self-supporting platform at four drilling points, obtain the drilling parameters, and sequence the target formation. Based on the sequence division results of the target formation, determine the designated layer to be measured;

[0020] Step 4: Extract the drilling depth H1 of the first point Zk1 corresponding to the specified layer, the drilling depth H2 of the second point Zk2 corresponding to the specified layer, the drilling depth H3 of the third point Zk3 corresponding to the specified layer, and the drilling depth H4 of the fourth point Zk4 corresponding to the specified layer according to the drilling parameter value. The drilling depth of the specified layer is equal to the absolute value of the height difference between the support platform and the upper interface of the specified layer.

[0021] Step 5: Use the formula Calculate the dip angle θ of a specified layer in the target formation.

[0022] Furthermore, in step one, a support platform of the same height as the dot position is constructed. The specific steps are: using the dot position as a reference, building the support platform, detecting the horizontal state of the support platform through a horizontal detection device, and keeping the support platform level during drilling.

[0023] Furthermore, in step 1, the range of the target area to be measured refers to the projection range of the underground structure on the plane, the stratum sequence penetrated by the underground structure constitutes the target stratum, and the designated horizon is a set of strata in the target stratum.

[0024] Furthermore, the underground structure includes an underground powerhouse of a pumped-storage power station.

[0025] Furthermore, the width of the underground powerhouse is equal to 2*r.

[0026] Furthermore, the drilling parameters include torque M, drilling speed v, and rotation speed N; the target formation is divided into sequences, specifically including: using the rock breaking comprehensive index Rbi, correcting the drilling parameter value to obtain a curve of the rock breaking comprehensive index changing with drilling depth, and on this basis, dividing the target formation into sequences according to the fluctuation of the curve, wherein Rbi=Mv 2 / N.

[0027] Furthermore, the drilling parameters include thrust FP, torque M, drilling speed v, and rotation speed N; the target formation is divided into sequences, specifically including correcting the drilling parameters with the formation drillability index Id to obtain a curve of the formation drillability index changing with drilling depth, and dividing the target formation into sequences based on the fluctuation of the curve, wherein:

[0028] A computer-readable storage medium, characterized in that the computer-readable storage medium includes a stored computer program, wherein when the computer program is run, the device where the computer-readable storage medium is located is controlled to execute the above method.

[0029] The advantages and technical effects of the present invention are as follows:

[0030] 1. The inversion of stratum inclination angles is performed through the geometric distribution and height difference of drilling points, which is suitable for stratum occurrence analysis of underground projects such as pumped storage power stations.

[0031] 2. The present invention utilizes and The dip measurement of local deep strata is converted into a geometric calculation problem on a plane. The accurate dip measurement can be completed using the drilling parameters depth and radius. It is low-cost and high-efficiency and is not limited by geological conditions and drilling quality.

[0032] 3. The present invention constructs the hole boundary with the circular point as the center and the length r as the radius, and sets 3 or 4 points at 90° intervals on the circumference of the hole boundary to ensure that the plane where the stratum to be measured is located is constructed using the principle of three points forming a plane.

[0033] 4. Based on the collation of a large number of drilling parameters, the comprehensive engineering rock breaking index Rbi=Mv was formed 2 / N. It has been verified in practice that the variation curve of the comprehensive engineering rock breaking index Rbi is more reliable than the variation curve of single drilling parameters including drilling speed, torque, propulsion pressure, etc. The depth recognition error is ≤0.06m, which has been confirmed in the geological survey practice of many pumped storage power station projects.

[0034] 5. The formation drillability index Id is of great value and significance for formation identification. The present invention uses the curve of the change of the formation drillability index with drilling depth as the basis for dividing the formation sequence, significantly improving the accuracy of identifying the structural plane of the formation sequence.

[0035] 6. This invention shortens the time required for regional integrated formation dip measurement from 5-15 days using traditional methods to 1-3 days. Accurately measuring the dip of deep formations in a local area requires only three or four boreholes, saving 1.2-1.5 million yuan per project. The invention has a wide range of applications and is suitable for measuring the dip of formations buried at depths of 50-500m. It is particularly useful for accurately measuring the dip of formations with gentle or moderately gentle dips (<15°) and for assessing the stability of underground powerhouses. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 Position relationship diagram of the underground powerhouse of the pumped storage power station and the target stratum and designated layer;

[0037] Figure 2 Relationship diagram between the support platform and the hole boundary position;

[0038] Figure 3 Schematic diagram of the inclination calculation principle of a specified layer (a. represents the schematic diagram of the layout of three drilling points, b. represents the schematic diagram of the layout of four drilling points). DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0040] The method for determining formation occurrence based on while-drilling parameters of the present invention comprises the following steps:

[0041] Step 1: Set a dot position at the highest point of the target area to be measured, build a support platform at the same height as the dot position, and set the hole position boundary on the support platform with the dot position Zk0 as the center and the length r as the radius;

[0042] Step 2: n drilling points are set sequentially and equidistantly on the circumference of the hole boundary, where n ≥ 3;

[0043] Step 3: Use a drilling rig equipped with a drilling process monitoring system to vertically drill toward the target formation along a self-supporting platform at n drilling points, obtain while-drilling parameter values, and sequence the target formation. Based on the sequence division results of the target formation, determine the designated layer whose occurrence is to be measured;

[0044] Step 4: extract the drilling depths of the designated layers corresponding to the n drilling points according to the drilling parameters. The drilling depth of the designated layer is equal to the absolute value of the height difference between the support platform and the upper interface of the designated layer.

[0045] Step 5: Calculate the inclination angle θ of the designated layer in the target stratum using a mathematical calculation formula between the inclination angle θ and the drilling depth and length r of the designated layer corresponding to the n drilling points.

[0046] Furthermore, n=3, specifically including:

[0047] Step 2: Set three drilling points, namely, the first point Zk1, the second point Zk2, and the third point Zk3, at intervals of 120° on the circumference of the hole boundary.

[0048] Step 3: Use a drilling rig equipped with a drilling process monitoring system to vertically drill toward the target formation along the self-supporting platform at three drilling points, obtain the drilling parameters, and sequence the target formation. Based on the sequence division results of the target formation, determine the designated layer to be measured;

[0049] Step 4: According to the drilling parameters, the drilling depth H1 of the first point Zk1 corresponding to the specified layer, the drilling depth H2 of the second point Zk2 corresponding to the specified layer, and the drilling depth H3 of the third point Zk3 corresponding to the specified layer are extracted. The drilling depth of the specified layer is equal to the absolute value of the height difference between the support platform and the upper interface of the specified layer. Step 5: Using the formula Calculate the dip angle θ of a specified layer in the target formation.

[0050] Furthermore, n=4, specifically including:

[0051] Step 2: Set four drilling points, namely, the first point Zk1, the second point Zk2, the third point Zk3, and the fourth point Zk4, at intervals of 90° on the circumference of the hole boundary.

[0052] Step 3: Use a drilling rig equipped with a drilling process monitoring system to vertically drill toward the target formation along the self-supporting platform at four drilling points, obtain the drilling parameters, and sequence the target formation. Based on the sequence division results of the target formation, determine the designated layer to be measured;

[0053] Step 4: Extract the drilling depth H1 of the first point Zk1 corresponding to the specified layer, the drilling depth H2 of the second point Zk2 corresponding to the specified layer, the drilling depth H3 of the third point Zk3 corresponding to the specified layer, and the drilling depth H4 of the fourth point Zk4 corresponding to the specified layer according to the drilling parameter value. The drilling depth of the specified layer is equal to the absolute value of the height difference between the support platform and the upper interface of the specified layer.

[0054] Step 5: Use the formula Calculate the dip angle θ of a specified layer in the target formation.

[0055] Furthermore, in step one, a support platform of the same height as the dot position is constructed. The specific steps are: using the dot position as a reference, building the support platform, detecting the horizontal state of the support platform through a horizontal detection device, and keeping the support platform level during drilling.

[0056] Furthermore, in step 1, the range of the target area to be measured refers to the projection range of the underground structure on the plane, the stratum sequence penetrated by the underground structure constitutes the target stratum, and the designated horizon is a set of strata in the target stratum.

[0057] Furthermore, the underground structure includes an underground powerhouse of a pumped-storage power station.

[0058] Furthermore, the width of the underground powerhouse is equal to 2*r.

[0059] Furthermore, the drilling parameters include torque M, drilling speed v, and rotation speed N; the target formation is divided into sequences, specifically including: using the rock breaking comprehensive index Rbi, correcting the drilling parameter value to obtain a curve of the rock breaking comprehensive index changing with drilling depth, and on this basis, dividing the target formation into sequences according to the fluctuation of the curve, wherein Rbi=Mv 2 / N.

[0060] Furthermore, the drilling parameters include thrust FP, torque M, drilling speed v, and rotation speed N; the target formation is divided into sequences, specifically including correcting the drilling parameters with the formation drillability index Id to obtain a curve of the formation drillability index changing with drilling depth, and dividing the target formation into sequences based on the fluctuation of the curve, wherein:

[0061] A computer-readable storage medium, characterized in that the computer-readable storage medium includes a stored computer program, wherein when the computer program is run, the device where the computer-readable storage medium is located is controlled to execute the above method.

[0062] Example

[0063] Project background: The target area is the stratum occurrence determination area of ​​a pumped storage power station project. According to the project scale and equipment specifications, this pumped storage power station project plans to build a medium-sized underground powerhouse, such as Figure 1 As shown, the designed width length is 2R=20m (r=10m), and the target layer is the quartz sandstone layer.

[0064] Hole layout: Figure 2 As shown in the figure, the circle point ZK0 (coordinates X = 325467.12, Y = 4875321.34) is selected at the highest point in the target area (the area to be measured), and a support platform at the same height as the circle point is constructed. The hole boundary is drawn on the support platform, and three drilling points are selected. The drilling points ZK1-ZK3 are arranged at an azimuth interval of 120°, and the spacing between them and ZK0 is r = 10m (error ≤ 0.1m). The verticality of the drilling trajectory is controlled: the deviation angle is <1° (in accordance with SY / T 5088-2016 standard). Figure 3 a is a schematic diagram showing the layout of three drilling points. Figure 3 b is a schematic diagram of a four-drilling point layout. This embodiment adopts a three-drilling point layout.

[0065] Drilling: A drilling rig equipped with a DPM system is used to drill at the desired point, acquiring a complete set of formation parameters within the drilling depth range. These parameters are then processed to form a curve of their variation with increasing drilling depth. The drilling rig can be a ZML-20 percussive rotary drill (drill bit diameter φ = 11 cm), equipped with a borehole imaging probe (resolution 0.1 mm / pixel, sampling interval 2 cm), and a DPM monitoring system (sampling frequency 50 Hz, parameter acquisition accuracy ±0.5%).

[0066] The depth range of the proposed underground powerhouse site is 78-92m. Figure 1 As shown, the target stratigraphic structure includes four strata: the Maoping Formation (sandstone interbedded with shale), the Xinhe Formation (quartz sandstone), and the Pingyang Formation (limestone). The designated horizon is the Xinhe Formation quartz sandstone layer (compressive strength >80 MPa, drillability grade VII). This example uses the Xinhe Formation as the designated horizon. In actual exploration, it is typically necessary to measure the entire occurrence of the target strata within the target area as a basis for a comprehensive assessment of the stability of the underground powerhouse.

[0067] Data processing: The while-drilling parameter change curves of ZK1-ZK3 detected mutation points in the Xinhe Formation at depths h1=86.7m, h2=88.1m, and h3=85.3m, respectively. Using a single downhole parameter, drilling speed, to divide the stratigraphic sequence, the drilling speed suddenly increased from about 0.5 m / min of the upper Maoping Formation to about 0.8 m / min, an increase of 60.5%. Compared with the drilling speed curve of the lower Pingyang Formation, the amplitude increased by an average of 38%. Using multiple downhole parameters, Rbi, to divide the stratigraphic sequence, the amplitude increased by an average of 125% compared with the Rbi curve of the Maoping Formation, and the amplitude increased by an average of 94% compared with the Rbi curve of the Pingyang Formation. It can be seen that the parameter sensitivity is improved, and the stratigraphic discrimination degree = Rbi change amplitude / single parameter change amplitude > 2 times. Rbi, as a processed downhole parameter, integrates the characteristics of torque M and drilling speed v being positively correlated with rock drillability, and rotation speed N being negatively correlated with rock drillability. It has a significant effect on the optimization of downhole parameter change curves and stratigraphic sequence division, and has been verified in a large number of projects and received good feedback.

[0068] Inclination calculation: Substitute n = 3, h1 = 86.7m, h2 = 88.1m, h3 = 85.3m, and r = 10m into the formula:

[0069]

[0070] The result is θ = arctan(4.85 / 30) = arctan(0.1617) ≈ 9.23°. Compared with the 8.9° dip angle measured by the traditional coring method, the error rate is only about 3.7%, which meets the requirement of the Code for Geological Investigation of Hydropower Engineering (GB 50287-2016) that the allowable error of dip angle is ≤ 5%, greatly saving the engineering cost of accurately measuring the dip angle of the formation.

[0071] The geometric principle of formation dip determination can be abstracted and generalized into a theoretical model: given the radius of the top circle of a cylinder, r, n equally spaced points on the circumference of the top circle, and the lengths of the oblique cross-section ellipse in the cylinder from the n equally spaced points on the circumference, h1 / h2 / h3...hn, the angle between the oblique cross-section ellipse and the top circle can be calculated using n, h1 / h2 / h3...hn, and r. This angle formula can be calculated using geometric calculations or derived using AI software.

[0072] Derivation steps

[0073] 1. Set the coordinate system and parameterized points

[0074] The top circle plane is located at z=0, the center of the circle is the origin, and the axis is along the z-axis.

[0075] The polar coordinates of the kth point are:

[0076]

[0077] The height of the corresponding point on the oblique section is hk. Assume that the equation of the oblique section plane is: z = ax + by + c

[0078] 2. Substitute into the plane equation

[0079] Substituting the coordinates of the point into the plane equation, we obtain: hk=arcosθk+brsinθk+c(k=1,2,…,n).

[0080] 3. Separation parameters a, b, c

[0081] Using the orthogonality condition (orthogonality of equally spaced distributions):

[0082] The constant term c:

[0083]

[0084] Slope parameters a, b:

[0085]

[0086] 4. Calculate the tilt angle

[0087] The plane normal vector is n = (a, b, -1), and the angle θ with the z-axis satisfies:

[0088]

[0089] Substitute the expressions for a and b:

[0090]

[0091] Considering the cost, n=3 or 4 is selected for drilling angle measurement.

[0092] When n=3, the angles are 0°, 120°, and 240°, and the result is simplified as follows:

[0093]

[0094] When n=4, the angles are 0°, 90°, 180°, and 270°, and the result is simplified as follows:

[0095]

[0096] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented in whole or in part in the form of a computer program product, the computer program product includes one or more computer instructions. When the computer program instructions are loaded or executed on a computer, the process or function described in the embodiment of the present invention is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL) or wireless (e.g., infrared, wireless, microwave, etc.)) method. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated. The available medium can be a magnetic medium (e.g., a floppy disk, a hard disk, a tape) or an optical medium.

[0097] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for determining formation occurrence based on while-drilling parameters, characterized in that: The following steps are involved: Step 1: Set a dot position at the highest point of the target area to be measured, build a support platform at the same height as the dot position, and set the hole position boundary on the support platform with the dot position Zk0 as the center and the length r as the radius; Step 2: n drilling points are set sequentially and equidistantly on the circumference of the hole boundary, where n ≥ 3; Step 3: Use a drilling rig equipped with a drilling process monitoring system to vertically drill toward the target formation along a self-supporting platform at n drilling points, obtain while-drilling parameter values, and sequence the target formation. Based on the sequence division results of the target formation, determine the designated layer whose occurrence is to be measured; Step 4: extract the drilling depths of the designated layers corresponding to the n drilling points according to the drilling parameters. The drilling depth of the designated layer is equal to the absolute value of the height difference between the support platform and the upper interface of the designated layer. Step 5: Calculate the inclination angle θ of the designated layer in the target stratum using a mathematical calculation formula between the inclination angle θ and the drilling depth and length r of the designated layer corresponding to the n drilling points.

2. The method for determining formation occurrence based on drilling parameters according to claim 1, characterized in that: n=3, specifically including: Step 2: Set three drilling points, namely, the first point Zk1, the second point Zk2, and the third point Zk3, at intervals of 120° on the circumference of the hole boundary. Step 3: Use a drilling rig equipped with a drilling process monitoring system to vertically drill toward the target formation along the self-supporting platform at three drilling points, obtain the drilling parameters, and sequence the target formation. Based on the sequence division results of the target formation, determine the designated layer to be measured; Step 4: Extract the drilling depth H1 of the first point Zk1 corresponding to the specified layer, the drilling depth H2 of the second point Zk2 corresponding to the specified layer, and the drilling depth H3 of the third point Zk3 corresponding to the specified layer according to the drilling parameters. The drilling depth of the specified layer is equal to the absolute value of the height difference between the support platform and the upper interface of the specified layer. Step 5: Use the formula Calculate the dip angle θ of a specified layer in the target formation.

3. The method for determining formation occurrence based on while-drilling parameters according to claim 1, characterized in that: n=4, specifically including: Step 2: Set four drilling points, namely, the first point Zk1, the second point Zk2, the third point Zk3, and the fourth point Zk4, at intervals of 90° on the circumference of the hole boundary. Step 3: Use a drilling rig equipped with a drilling process monitoring system to vertically drill toward the target formation along the self-supporting platform at four drilling points, obtain the drilling parameters, and sequence the target formation. Based on the sequence division results of the target formation, determine the designated layer to be measured; Step 4: Extract the drilling depth H1 of the first point Zk1 corresponding to the specified layer, the drilling depth H2 of the second point Zk2 corresponding to the specified layer, the drilling depth H3 of the third point Zk3 corresponding to the specified layer, and the drilling depth H4 of the fourth point Zk4 corresponding to the specified layer according to the drilling parameter value. The drilling depth of the specified layer is equal to the absolute value of the height difference between the support platform and the upper interface of the specified layer. Step 5: Use the formula Calculate the dip angle θ of a specified layer in the target formation.

4. The method for determining formation occurrence based on while-drilling parameters according to claim 1, characterized in that: In step one, a support platform is constructed at the same height as the dot position. The specific steps are: using the dot position as a reference, building the support platform, detecting the horizontal state of the support platform through a horizontal detection device, and keeping the support platform level during drilling.

5. The method for determining formation occurrence based on while-drilling parameters according to claim 1, characterized in that: In step 1, the range of the target area to be measured refers to the projection range of the underground structure on the plane, the stratum sequence penetrated by the underground structure constitutes the target stratum, and the designated horizon is a set of strata in the target stratum.

6. The method for determining formation occurrence based on while-drilling parameters according to claim 5, characterized in that: The underground structure includes an underground powerhouse of a pumped storage power station.

7. The method for determining formation occurrence based on while-drilling parameters according to claim 6, characterized in that: The width of the underground powerhouse is equal to 2*r.

8. The method for determining formation occurrence based on while-drilling parameters according to claim 1, characterized in that: The drilling parameters include torque M, drilling speed v, and rotation speed N; Sequence the target formation, specifically including using the rock breaking comprehensive index Rbi to modify the drilling parameter value to obtain the rock breaking comprehensive index change curve with drilling depth, and then sequence the target formation according to the fluctuation of the curve, where Rbi = Mv 2 / N.

9. The method for determining formation occurrence based on while-drilling parameters according to claim 1, characterized in that: The drilling parameters include propulsion force FP, torque M, drilling speed v, and rotation speed N; Sequencing the target formation includes, specifically, modifying the drilling parameter value with the formation drillability index Id to obtain a curve of the formation drillability index changing with drilling depth, and then dividing the target formation into sequences based on the fluctuation of the curve, wherein:

10. A computer-readable storage medium, characterized in that The computer-readable storage medium includes a stored computer program, wherein when the computer program is executed, the device where the computer-readable storage medium is located is controlled to execute the method according to any one of claims 1 to 9.

Images