A method, system and storage medium for measuring stratum boundaries

Abstract

The present invention relates to the technical field of intelligent energy mining, and in particular to a method, system and storage medium for measuring formation boundaries. The method is applied to a formation measurement system, and the method comprises: determining a working state according to a received instruction; when the working state is to measure formation data, obtaining position information for describing the formation position; and determining the direction of advance of the drill bit of the formation measurement system according to the position information. The method can measure the resistivity while measuring the azimuth gamma at a position near the drill bit, thereby solving the problem that the logging while drilling system and the near-drill bit system in the prior art cannot timely and accurately measure the changes in the formation boundary, resulting in the deviation of the drill bit position.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent energy mining, and in particular to a method, system and storage medium for measuring stratum boundaries. Background Art

[0002] In the process of exploiting thin-layer oil and gas resources, it is necessary to accurately measure the formation data and determine the exploitation location and corresponding exploitation operations based on the measurement results.

[0003] Usually, a logging while drilling system is used to measure formation data. Conventional logging while drilling systems have a measurement point that is far from the bottom of the well, usually 10 to 15 meters away, and are internally connected by physical cables to complete the signal transmission process. During this process, when drilling encounters a formation boundary, the change in the formation boundary cannot be measured in a timely manner. When the instrument measurement value changes, the drill bit is often far away from the oil and gas reservoir. The adjustment of the wellbore direction will result in the loss of a long reservoir, and also greatly increases the complexity of the geological guidance. In order to solve this problem, some near-drill bit systems have also appeared in the prior art, that is, azimuth gamma can be measured at a distance close to the drill bit, but this method can only measure azimuth gamma, which cannot provide accurate information for the acquisition of complex underground environment information.

[0004] It can be seen that the logging while drilling system and the near-bit system in the prior art are unable to timely and accurately measure the changes in the formation boundary, resulting in the deviation of the drill bit position. Summary of the invention

[0005] The embodiment of the present invention provides a method, system and storage medium for measuring formation boundaries, which are used to solve the problem that the logging while drilling system and the near-drill bit system in the prior art cannot timely and accurately measure the changes in the formation boundaries, resulting in the deviation of the drill bit position. The specific method is as follows:

[0006] In a first aspect, an embodiment of the present invention provides a method for measuring a stratum boundary, the method being applied to a stratum measurement system, the method comprising:

[0007] Determine the working status according to the received instructions;

[0008] When the working state is measuring formation data, obtaining position information for describing the position of the formation;

[0009] The advancing direction of the drill bit of the formation measurement system is determined according to the position information.

[0010] Wherein, determining the working status according to the received instruction includes:

[0011] When the instruction is to enter the sleep state, the working state of the near-bit short section module of the formation measurement system is in the transportation and short-term storage state.

[0012] Wherein, determining the working status according to the received instruction includes:

[0013] When the instruction is to enter the standby state, the working state of the near-bit short section module of the formation measurement system is to enter the ready state.

[0014] The near-bit short section module includes a near-bit transmitting short section module and a near-bit receiving short section module, and the working state is determined according to the received instruction, including:

[0015] Detecting a first relative position between the near-bit launching sub module and the casing of the formation measuring system;

[0016] Detecting a second relative position between the near-bit receiving sub module and the casing;

[0017] When the first relative position and the second relative position are both greater than a preset position, the instruction is to enter a working state, and the working states of the near-bit transmitting pup joint module and the near-bit receiving pup joint module are determined to measure formation data.

[0018] The step of obtaining the position information for describing the position of the stratum includes:

[0019] The near-drill-bit short-section module of the formation measurement system is provided with a sensor for measuring well inclination and roll angle;

[0020] The position information of the drill bit end of the formation measurement system is determined according to the measured well inclination and the roll angle.

[0021] Wherein, determining the advancing direction of the drill bit of the formation measurement system according to the position information comprises:

[0022] When the position information of the drill bit end is different from the preset position information, the drill bit end continues to move forward in the direction determined by the well inclination and the roll angle;

[0023] When the position information of the drill bit end is the same as the preset position information, the sensor obtains the resistivity and the return value of the gamma ray, and determines the advancing direction of the drill bit according to the resistivity and the return value.

[0024] Wherein, determining the advancing direction of the drill bit according to the resistivity and the return value comprises:

[0025] When the resistivity and the return value determine that the position between the drill bit and the upper formation is less than a first preset position, the drill bit moves down the preset position to obtain a first target position, and the forward direction is determined according to the first target position;

[0026] When the resistivity and the return value determine that the position of the drill bit and the upper formation is greater than the first preset position, the drill head moves up the preset position to obtain a second target position, and the forward direction is determined according to the second target position.

[0027] Wherein, determining the advancing direction of the drill bit according to the resistivity and the return value comprises:

[0028] According to the resistivity and the return value, respectively determine an upper distance value between the drill bit and an upper formation, and a lower distance value between the drill bit and a lower formation;

[0029] When the difference between the upper distance value and the lower distance value is less than the second preset position value, the drill bit moves down the preset position to obtain a first target position, and the forward direction is determined according to the first target position;

[0030] When the difference between the upper distance value and the lower distance value is greater than a second preset position value, the drill head moves up the preset position to obtain a second target position, and the forward direction is determined according to the second target position.

[0031] Wherein, the method further comprises:

[0032] The well inclination, gamma ray return value, resistivity, the distance value between the drill bit of the formation measuring system and the upper formation, and the distance value between the drill bit and the lower formation measured by the formation measuring system are displayed on the screen in a visual manner.

[0033] Wherein, the method further comprises:

[0034] The well deviation, gamma ray return value and resistivity measured by the formation measurement system are enhanced, filtered and denoised.

[0035] In a second aspect, an embodiment of the present invention provides a system for measuring formations, the system comprising:

[0036] A determination module, used to determine the working state according to the received instruction;

[0037] An acquisition module, used for acquiring position information for describing the position of the formation when the working state is to measure formation data;

[0038] An operation module is used to determine the advancing direction of the drill bit of the formation measurement system according to the position information.

[0039] In a third aspect, an embodiment of the present invention provides a computer-readable storage medium having a computer program stored thereon, which implements the above method when executed by a processor.

[0040] The method for measuring formation boundaries provided by the embodiment of the present invention determines the working state according to the received instruction; when the working state is measuring formation data, obtains the position information used to describe the formation position; and determines the direction of the drill bit of the formation measurement system according to the position information. The method can measure the azimuth gamma at the position near the drill bit while measuring the resistivity, thereby solving the problem that the logging while drilling system and the near-drill bit system in the prior art cannot timely and accurately measure the changes in the formation boundary, resulting in the deviation of the drill bit position. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a structural reference diagram of a formation measurement system provided by an embodiment of the present invention;

[0042] Figure 2 is a flow chart of a method for measuring stratum boundaries provided by an embodiment of the present invention;

[0043] Figure 3 It is a schematic diagram of the structure of a formation measurement system provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0044] In order to make the technical problems, technical solutions and advantages to be solved by the present invention more clear, a detailed description will be given below with reference to the accompanying drawings and specific embodiments.

[0045] like Figure 1 As shown, the structure reference diagram of the measurement formation system provided by this application is as follows Figure 1 As shown, it includes a near-bit transmitting short section module, a near-bit receiving short section module, a bit end, a screw, a drill pipe assembly and an MWD system (or a LWD system). In actual application, the formation measurement system structure can exchange information with the remote system and the ground system. The technical solutions applied to the system are as follows:

[0046] like Figure 2 As shown, a method for measuring stratum boundaries is used to solve the technical problems existing in the prior art. The specific method is as follows:

[0047] Step 21, determining the working status according to the received instruction;

[0048] Step 22, when the working state is to measure formation data, obtain position information for describing the formation position;

[0049] Step 23, determining the advancing direction of the drill bit of the formation measurement system according to the position information.

[0050] Depending on the user's operation, the formation measurement system will be in different working states, and different working states will lead to different subsequent work contents. The formation measurement system's near-bit short section module has a built-in large-capacity battery, and combined with an intelligent power management system, the continuous measurement working time can reach more than 200 hours. The formation measurement system has three states: sleep, standby, and measurement, and can flexibly adjust the power supply strategy under various working conditions. Specific step 21 includes the following situations:

[0051] First, when the instruction is to enter the sleep state, the working state of the near-bit short section module of the formation measurement system is in the state of transportation and short-term storage. That is, when the formation measurement system has just been produced, or there is still a long time before the specific application, the formation measurement system can be put into the sleep state. For example, after being installed and connected to the battery in the workshop, the near-bit short section module can be put into the sleep state through the configuration tool, and then transported and stored for a short time. The sleep state can be on standby for more than half a year, and the energy consumption is only 1% of the battery capacity.

[0052] The second method is to detect the first relative position of the near-bit transmitting submodule and the casing of the formation measurement system; and detect the second relative position of the near-bit receiving submodule and the casing; when the first relative position and the second relative position are both greater than the preset position, the instruction is to enter the working state, and the working state of the near-bit transmitting submodule and the near-bit receiving submodule is to measure formation data. For example, when the near-bit transmitting submodule and the near-bit receiving submodule leave the casing, the first relative position and the second relative position will naturally be generated between the casing, that is, the first relative position is the distance between the near-bit transmitting submodule and the casing after leaving the casing, and the second relative position is the distance between the near-bit transmitting submodule and the casing after leaving the casing. When the first relative position and the second relative position are both greater than the preset position, it can be determined that the near-bit transmitting submodule and the near-bit receiving submodule have left the casing respectively, and at this time, it is explained that the working state of the formation measurement system and the near-bit transmitting submodule and the near-bit receiving submodule is to measure formation data.

[0053] Thirdly, when the instruction is to enter the standby state, the working state of the near-bit short section module of the formation measurement system is to enter the ready state.

[0054] In the actual construction process, after the drill bit is installed, the wake-up operation is performed first. After the wake-up, the near-bit short section module enters the ready state. The formation measurement system is used to drill down. During the drilling process, the measurement and transmission related operations will not be started. When the formation measurement system reaches the specified position, the near-bit short section module will be started. When the near-bit receiving short section module and the near-bit transmitting short section module are out of the casing, drilling can be carried out at any time. The drill bit transmitting short section module will adaptively measure and transmit the measured resistivity and azimuth gamma. When drilling stops, the near-bit short section module will automatically return to the ready state to save power. When drilling is completed, the near-bit short section module is pulled out and the configuration box is used on the derrick for sleep processing. The near-bit transmitting short section module enters the low-power mode.

[0055] The step 22 of obtaining the position information for describing the position of the stratum includes the following steps:

[0056] The near-drill-bit short-section module of the formation measurement system is provided with a sensor for measuring well inclination and roll angle;

[0057] According to the measured well inclination and the roll angle, the position information of the drill bit end of the formation measurement system is determined. After the position information is determined, the determination of the advancing direction of the drill bit of the formation measurement system according to the position information in step 23 includes the following steps:

[0058] When the position information of the drill bit end is different from the preset position information, the drill bit end continues to move forward in the direction determined by the well inclination and the roll angle;

[0059] When the position information of the drill bit end is the same as the preset position information, the sensor obtains the resistivity and the return value of the gamma ray, and determines the advancing direction of the drill bit according to the resistivity and the return value.

[0060] In the above process, when the measured position information of the near-bit end is the same as the preset position information, it indicates that the formation measurement system has reached the designated position, otherwise it has not reached the designated position.

[0061] When the near-bit launch sub module integrates the azimuth gamma module, the rotation inclinometer module, the resistivity measurement module, and the battery module, it can automatically perform gamma ray statistics in all directions when the drill bit is rotated. When the formation measurement system reaches the specified position, it needs to adjust the forward direction to measure the target formation. The specific adjustment methods include the following:

[0062] The first one,

[0063] When the resistivity and the return value determine that the position of the drill bit and the upper formation is less than the first preset position, the drill bit moves down the preset position to obtain the first target position, and the forward direction is determined according to the first target position; for example, the position of the drill bit and the upper formation is judged according to the resistivity and the return value. When the position of the drill bit and the upper formation is less than the first preset position, it means that the drill bit is too close to the upper formation. At this time, continuing to move forward may reach other formations, resulting in inaccurate measurement data. Therefore, it is necessary to move down the preset position so that the drill bit remains at the first target position, that is, there is a reasonable distance between the drill bit and the upper and lower formations.

[0064] When the resistivity and the return value determine that the position of the drill bit and the upper stratum is greater than the first preset position, the drill bit moves up the preset position to obtain the second target position, and the forward direction is determined according to the second target position. That is, the drill bit is too close to the lower stratum, and should move upward to the second target position so that the drill bit and the upper and lower strata are in a reasonable position.

[0065] The second type,

[0066] According to the resistivity and the return value, respectively determine an upper distance value between the drill bit and an upper formation, and a lower distance value between the drill bit and a lower formation;

[0067] When the difference between the upper distance value and the lower distance value is less than the second preset position value, the drill bit moves down to the preset position to obtain the first target position, and the forward direction is determined according to the first target position; that is, at this time the distance to the upper formation is too close and it needs to move downward to the first target position.

[0068] When the difference between the upper distance value and the lower distance value is greater than the second preset position value, the drill head moves up to the preset position to obtain the second target position, and the forward direction is determined according to the second target position. That is, the drill head is too close to the lower stratum at this time and needs to move upward to the second target position.

[0069] You can choose one of the above two methods according to your actual needs.

[0070] In one embodiment, the well inclination, gamma ray return value, resistivity, the distance value between the drill bit of the formation measurement system and the upper formation, and the distance value between the drill bit and the lower formation measured by the formation measurement system are displayed on the screen in a visual manner.

[0071] In one embodiment, the well inclination, gamma ray return value and resistivity measured by the formation measurement system are enhanced, filtered and denoised. When the well inclination, gamma ray return value and resistivity measured by the formation measurement system are greater than the preset position value, and the position information of the receiving short section module is received, the casing is

[0072] The exploitation of thin-layer oil and gas resources requires accurate measurement of formation data. Conventional logging while drilling systems cannot measure changes in formation boundaries in a timely manner when drilling into formation boundaries, because the measurement points for measuring formation data are 10 to 15 meters away from the bottom of the well. When the instrument measurement value changes, the drill bit is often far away from the oil and gas reservoir. The adjustment of the wellbore direction will result in the loss of a longer reservoir, and it also greatly increases the complexity of geological guidance.

[0073] The near-bit measurement while drilling system can realize real-time measurement of parameters such as formation resistivity and gamma ray intensity at the drill bit, and is not affected by mud invasion. It can timely determine the formation where the drill bit is located, and can use the azimuth gamma imaging function to determine in which direction the drill bit is approaching a certain formation, so as to adjust the wellbore direction in time, thereby realizing precise coordinate control of the drill bit and improving the drilling rate of the oil layer.

[0074] The system is based on advanced space-time coding communication technology, high-speed and stable well inclination measurement technology, and efficient direct carrier burst modulation technology. It ensures accurate measurement and reliable communication under harsh formation conditions and has strong adaptability to complex formations.

[0075] The following is described with specific examples:

[0076] like Figure 1 As shown, the formation measurement system consists of a near-bit transmitting short section module, a near-bit short section receiving module, a drill head, a screw, a drill pipe assembly and an MWD system (which can also be a LWD system).

[0077] The near-bit launch submodule integrates the azimuth gamma module, the rotation inclinometer module, the resistivity measurement module, and the battery module, and can automatically perform gamma ray statistics in all directions when the drill bit is rotated. The system has a built-in large-capacity battery, and the continuous measurement working time can reach more than 200 hours. It has three states: sleep, standby, and measurement, and can flexibly adjust the power supply strategy under various working conditions. After the battery is installed and connected in the workshop, the near-bit submodule can be put into sleep mode through the configuration tool, and then transported and stored for a short time. The sleep state can be on standby for more than half a year, and the energy consumption is only 1% of the battery capacity.

[0078] During construction, after the drill bit is installed, the wake-up operation is performed. After the wake-up, the near-drill-bit receiving and / or transmitting short-section module enters the ready state. Drilling can be carried out, and measurement and transmission will not be started during the drilling process. When the near-drill-bit transmitting and receiving short-section modules are out of the casing, drilling can be carried out at any time. The near-drill-bit transmitting short-section module will perform adaptive measurement and transmission of resistivity and azimuth gamma. When drilling stops, the near-drill-bit transmitting short-section module will automatically return to the ready state to save power.

[0079] After drilling is completed, the near-drill-bit transmitting and receiving short section modules are pulled out and put into sleep mode using a configuration box on the derrick. The near-drill-bit transmitting short section module enters a low-power consumption mode.

[0080] The near-bit receiving short section module performs conditioning and demodulation of the near-bit wireless signal. It is installed at the lower end of the remote probe tube and is powered by the probe tube. It can work in an extremely wide voltage range of 25V to 70V. The near-bit receiving short section module adopts advanced space-time coding technology and time window technology. Through active noise reduction, it effectively combats the sky noise and non-Gaussian noise in the low-frequency radio band. The weak signal conditioning technology further enhances the signal gain. Combined with the maximum likelihood estimation optimal receiver technology, it performs encoding and circuit optimization for the Shannon theorem channel capacity limit, and has an automatic gain control function to achieve formation matching. When the formation resistivity is lower than 0.3 ohm·meter, reliable communication can still be maintained. And because the process of the technical solution provided by the present invention can make the near-bit transmitting and receiving short section module very small, it can be applied to wells with a diameter of about 178mm, and the length can be controlled within 50cm. The solution provided by the present invention can be battery-powered, so it can continuously measure for more than 200 hours.

[0081] The embodiment of the present invention provides a system for measuring formations, the specific structure of which is as follows: Figure 3 As shown:

[0082] A determination module 31, used to determine the working state according to the received instruction;

[0083] An acquisition module 32, used for acquiring position information 33 for describing the position of the formation when the working state is to measure formation data;

[0084] The operating module 34 is used to determine the advancing direction of the drill bit of the formation measurement system according to the position information.

[0085] The determination module is specifically used for, when the instruction is to enter the sleep state, the working state of the near-bit short section module of the formation measurement system is in the transportation and short-term storage state.

[0086] The determination module is specifically used for, when the instruction is to enter the standby state, the working state of the near-bit short section module of the formation measurement system is to enter the ready state.

[0087] The near-bit pup joint module includes a near-bit transmitting pup joint module and a near-bit receiving pup joint module, and the determination module is specifically used to detect a first relative position of the near-bit transmitting pup joint module and the casing of the formation measuring system; detect a second relative position of the near-bit receiving pup joint module and the casing; when the first relative position and the second relative position are both greater than a preset position, the instruction is to enter a working state, and determine that the working states of the near-bit transmitting pup joint module and the near-bit receiving pup joint module are to measure formation data.

[0088] The operation module is specifically used for: a sensor for measuring well inclination and roll angle is provided in a near-drill bit short section module of the formation measurement system; and the position information of the drill bit end of the formation measurement system is determined according to the measured well inclination and roll angle.

[0089] Wherein, determining the advancing direction of the drill bit of the formation measurement system according to the position information comprises:

[0090] When the position information of the drill bit end is different from the preset position information, the drill bit end continues to move forward in the direction determined by the well inclination and the roll angle;

[0091] When the position information of the drill bit end is the same as the preset position information, the sensor obtains the resistivity and the return value of the gamma ray, and determines the advancing direction of the drill bit according to the resistivity and the return value.

[0092] Wherein, determining the advancing direction of the drill bit according to the resistivity and the return value comprises:

[0093] When the resistivity and the return value determine that the position between the drill bit and the upper formation is less than a first preset position, the drill bit moves down the preset position to obtain a first target position, and the forward direction is determined according to the first target position;

[0094] When the resistivity and the return value determine that the position of the drill bit and the upper formation is greater than the first preset position, the drill head moves up the preset position to obtain a second target position, and the forward direction is determined according to the second target position.

[0095] Wherein, determining the advancing direction of the drill bit according to the resistivity and the return value comprises:

[0096] According to the resistivity and the return value, respectively determine an upper distance value between the drill bit and an upper formation, and a lower distance value between the drill bit and a lower formation;

[0097] When the difference between the upper distance value and the lower distance value is less than the second preset position value, the drill bit moves down the preset position to obtain a first target position, and the forward direction is determined according to the first target position;

[0098] When the difference between the upper distance value and the lower distance value is greater than a second preset position value, the drill head moves up the preset position to obtain a second target position, and the forward direction is determined according to the second target position.

[0099] The well inclination, gamma ray return value, resistivity, the distance value between the drill bit of the formation measuring system and the upper formation, and the distance value between the drill bit and the lower formation measured by the formation measuring system are displayed on the screen in a visual manner.

[0100] A person skilled in the art will understand that all or part of the steps to implement the above embodiments may be accomplished by hardware or by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a disk or an optical disk, etc.

[0101] 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, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for measuring stratum boundaries, the method being applied to measuring a stratum system, characterized in that: The method comprises: Determine the job status in one of three ways: First, when the received instruction is to enter the sleep state, the working state of the near-bit short section module of the formation measurement system is in the transport and short-term storage state; Second, when the instruction is to enter the standby state, the working state of the near-bit short section module is to enter the ready state; The third method is to detect the first relative position of the near-bit transmitting peg module in the near-bit peg module and the casing of the formation measuring system; detect the second relative position of the near-bit receiving peg module in the near-bit peg module and the casing; when the first relative position and the second relative position are both greater than the preset position, the instruction is to enter the working state, and determine that the working state of the near-bit transmitting peg module and the near-bit receiving peg module is to measure formation data; when the working state is to measure formation data, a sensor for measuring well inclination and roll angle is provided in the near-bit peg module; according to the measured well inclination and roll angle, the position information of the drill bit end of the formation measuring system is determined; When the position information of the drill bit end is different from the preset position information, the drill bit end continues to move forward in the direction determined by the well inclination and the roll angle; When the position information of the drill bit end is the same as the preset position information, the sensor obtains the resistivity and the return value of the gamma ray, and determines the advancing direction of the drill bit according to the resistivity and the return value.

2. The method according to claim 1, characterized in that: Determining the advancing direction of the drill bit according to the resistivity and the return value includes: When the resistivity and the return value determine that the position between the drill bit and the upper formation is less than a first preset position, the drill bit moves down the preset position to obtain a first target position, and the forward direction is determined according to the first target position; When the resistivity and the return value determine that the position of the drill bit and the upper formation is greater than the first preset position, the drill head moves up the preset position to obtain a second target position, and the forward direction is determined according to the second target position.

3. The method according to claim 2, characterized in that: Determining the advancing direction of the drill bit according to the resistivity and the return value includes: According to the resistivity and the return value, respectively determine an upper distance value between the drill bit and an upper formation, and a lower distance value between the drill bit and a lower formation; When the difference between the upper distance value and the lower distance value is less than the second preset position value, the drill bit moves down the preset position to obtain a first target position, and the forward direction is determined according to the first target position; When the difference between the upper distance value and the lower distance value is greater than a second preset position value, the drill head moves up the preset position to obtain a second target position, and the forward direction is determined according to the second target position.

4. The method according to claim 1, characterized in that The method further comprises: The well inclination, gamma ray return value, resistivity, the distance value between the drill bit of the formation measuring system and the upper formation, and the distance value between the drill bit and the lower formation measured by the formation measuring system are displayed on the screen in a visual manner.

5. The method according to any one of claims 1 to 4, characterized in that: The method further comprises: The well deviation, gamma ray return value and resistivity measured by the formation measurement system are enhanced, filtered and denoised.

6. A system for measuring formations, characterized in that: The system is applied to a method for measuring stratum boundaries, comprising: The determination module is used to determine the working status in one of the following three ways: First, when the received instruction is to enter the sleep state, the working state of the near-bit short section module of the formation measurement system is in the transport and short-term storage state; Second, when the instruction is to enter the standby state, the working state of the near-bit short section module is to enter the ready state; The third method is to detect a first relative position of a near-bit transmitting short section module in the near-bit short section module and a casing of the formation measuring system; and detect a second relative position of a near-bit receiving short section module in the near-bit short section module and the casing; when both the first relative position and the second relative position are greater than a preset position, the instruction is to enter a working state, and determine that the working states of the near-bit transmitting short section module and the near-bit receiving short section module are to measure formation data; An acquisition module, for determining the position information of the drill bit end of the formation measurement system according to the measured well inclination and the roll angle, when the working state is to measure formation data, wherein the near-drill-bit short section module is provided with a sensor for measuring well inclination and roll angle; An operating module is used for, when the position information of the drill bit end is different from the preset position information, the drill bit end continues to move forward in the direction determined by the well inclination and the roll angle; when the position information of the drill bit end is the same as the preset position information, the sensor obtains the return values ​​of the resistivity and the gamma ray, and determines the forward direction of the drill bit according to the resistivity and the return values.

7. A computer-readable storage medium, characterized in that: A computer program is stored thereon, and when the program is executed by a processor, the method according to any one of claims 1 to 4 is implemented.

Images