A thin-layered volcanic rock horizontal well while-drilling trajectory control method, system and device

Abstract

This invention relates to the field of petroleum exploration technology, and particularly to a method, system, and apparatus for controlling the drilling trajectory of horizontal wells in thin-layer volcanic rock formations. The method includes: establishing a geological model of the thin-layer volcanic rock reservoir in the target block using drilling, logging, and 3D seismic data. The geological model includes parameters such as burial depth, lithology, stratigraphic occurrence, fault development, and reservoir thickness. Based on the geological model of the thin-layer volcanic rock reservoir in the target block, the location and depth of each target point in the horizontal section of the thin-layer volcanic rock reservoir are determined, and an initial drilling trajectory for the horizontal well is designed based on each target point. During drilling, the drilling encounter is assessed based on changes in logging-while-drilling data and elemental logging data, combined with the reservoir thickness and stratigraphic occurrence of the thin-layer volcanic rock reservoir in the target block, thereby adjusting the drilling trajectory. Potassium, sodium, and silicon elements in the elemental logging data are assigned weighted values. This method can improve the productivity of volcanic rock reservoirs.

Description

Technical Field

[0001] This invention relates to the field of petroleum exploration technology, and in particular to a method, system and device for controlling the drilling trajectory of horizontal wells in thin-layer volcanic rock. Background Technology

[0002] Volcanic rock oil and gas accumulation conditions are complex, making exploration and development difficult. When the thickness of volcanic rock is relatively thin (32-102m), drilling horizontal wells and ensuring their smooth passage through high-quality reservoir sections is particularly challenging, especially when the volcanic rock reservoir has two cycles. For example, when eruptive volcanic clastic lava is mainly developed in the first cycle, forming a porous reservoir, and fractured basalt reservoir is mainly developed in the second cycle, the volcanic clastic lava and basalt in the drilling cuttings are not significantly different. It is difficult to accurately target the porous reservoir of eruptive volcanic clastic lava using only field logging data or elemental logging data analysis, making it difficult for the drill bit to pass smoothly through high-quality reservoir sections, thus resulting in low productivity development efficiency of volcanic rock horizontal wells. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of existing technologies, such as when volcanic rock reservoirs have two cycles of eruptive volcanic clastic lava and fractured basalt, the volcanic clastic lava and basalt in the drilling cuttings are relatively similar, and it is difficult to accurately target the eruptive volcanic clastic lava porous reservoir by using only field logging data or elemental logging data analysis. This makes it difficult for the drill bit to travel smoothly in high-quality reservoir sections, resulting in low productivity development efficiency of volcanic horizontal wells. The invention provides a method, system and device for controlling the drilling trajectory of thin-layer volcanic horizontal wells.

[0004] In a first aspect, the present invention provides a method for controlling the drilling trajectory of a horizontal well in thin-layer volcanic rock, comprising the following steps: S1: using drilling, logging, and 3D seismic data of the target block, a geological model of the thin-layer volcanic rock reservoir in the target block is established, wherein the geological model includes parameters such as burial depth, lithology, stratigraphic occurrence, fault development, and reservoir thickness; S2: based on the geological model of the thin-layer volcanic rock reservoir in the target block, the location and depth of each target point in the horizontal section of the thin-layer volcanic rock reservoir are determined, and the initial drilling trajectory of the horizontal well is designed based on each target point; S3: during drilling, the drilling encounter is judged based on the changes in drilling logging data and drilling elemental logging data, combined with the reservoir thickness and stratigraphic occurrence of the thin-layer volcanic rock reservoir in the target block, and the drilling trajectory is adjusted accordingly, wherein potassium, sodium, and silicon elements in the drilling elemental logging data are assigned weight values ​​respectively.

[0005] This invention first establishes a geological model of the thin-layer volcanic rock reservoir in the target block based on drilling, logging, and 3D seismic data. Then, based on this model, the location and depth of each target point within the horizontal section of the thin-layer volcanic rock reservoir are determined. An initial drilling trajectory is designed according to the reservoir development in the horizontal section. Since there are significant differences in the content of potassium, sodium, and silicon between volcanic clastic lava and basalt, the drilling trajectory is adjusted and optimized in real time during drilling, taking into account logging, elemental logging, formation occurrence, and the top and bottom positions and depths of the reservoir in the geological model. This allows the drill bit to quickly and accurately traverse the target windows within the thin-layer volcanic rock reservoir. This method improves the encounter rate of high-quality volcanic rock reservoirs, is beneficial for increasing the productivity of single-well volcanic rock, and provides a guarantee for large-scale reserve growth in volcanic rock.

[0006] Step S1 includes: S11: Obtaining the vertical development characteristics of thin-layer volcanic rock reservoirs in the target block using single-well drilling, logging, and 3D seismic data; S12: Obtaining the vertical and horizontal development characteristics of thin-layer volcanic rock reservoirs in the target block through the vertical development characteristics of thin-layer volcanic rock reservoirs in each single well; S13: Establishing a geological model of thin-layer volcanic rock reservoirs in the target block based on the vertical and horizontal development characteristics of thin-layer volcanic rock reservoirs in the target block.

[0007] In step S12, the vertical and horizontal development characteristics of the thin-layer volcanic rock reservoir in the target block are obtained by volcanic rock impedance inversion or porosity property prediction.

[0008] In step S13, the geological model of the thin-layer volcanic rock reservoir of the target block is obtained by time-depth conversion of the volcanic rock impedance inversion or porosity property prediction results.

[0009] In step S2, each target point includes target point A, target point B, and target point K. Target point A is the starting position of the drill bit entering the thin volcanic rock horizontal reservoir section, target point B is the ending position of the drill bit in the thin volcanic rock horizontal reservoir section, and target point K is the control point between target point A and target point B. The selection of target point K is based on at least one of the following factors: lithological changes, fault development degree, and stratigraphic occurrence changes.

[0010] Preferably, lithological change refers to abrupt changes in lithology, such as the boundary between volcanic rock and metamorphic rock, which can be used as the selection location for K-target points; fault development degree refers to the location where faults are relatively well developed in the rock strata, and when the fault displacement is greater than or equal to 20m, it can be used as the selection location for K-target points; stratigraphic attitude change refers to the location where the strata change from updip to downdip or from downdip to updip, and when the strata change from updip to downdip or from downdip to updip, it can be used as the selection location for K-target points. By selecting K-target points, the drilling trajectory of the drill bit is connected through each target point, which increases the probability of the drill bit staying in the reservoir.

[0011] Furthermore, the number of K-targets is several, and the number of K-targets can be determined according to the actual situation of the strata.

[0012] In step S3, the logging-while-drilling data includes natural gamma curves and resistivity curves, and the elements in the elemental logging-while-drilling data include potassium, sodium, and silicon.

[0013] In the elemental logging data while drilling, potassium, sodium and silicon are assigned weight values ​​respectively, wherein the weight value of potassium is preset to 0.45-0.55, the weight value of sodium is preset to 0.25-0.35 and the weight value of silicon is preset to 0.15-0.25, and the sum of the weight values ​​of each parameter is 1.

[0014] Preferably, the weight value of potassium is preset to 0.5, the weight value of sodium is preset to 0.3, and the weight value of silicon is preset to 0.2.

[0015] Because the composition of potassium, sodium, and silicon in volcanic rocks differs significantly from their composition in other rock types, pre-setting weight values ​​allows for the differentiation of volcanic rock lithology from core samples of other rock types based on elemental logging data. This improves the accuracy of determining drill bit encounters. When the drill bit encounters a volcanic rock reservoir, the natural gamma curve value increases, the resistivity curve value decreases significantly, the potassium content decreases significantly, the sodium content increases, and the silicon content decreases.

[0016] In step S3, the drilling situation of the drill bit is the well inclination angle of the drill bit's location, which is expressed by the formula:

[0017] Seek;

[0018] Where θ is the well inclination angle at the drill bit's location, α is the apparent dip angle of the formation, and H... 底 H represents the depth of the reservoir bottom boundary. 顶 L represents the depth of the top boundary of the reservoir, and L is the distance between the current position of the drill bit and the target drilling position.

[0019] When the strata are horizontal, the apparent dip angle α is 0, using the formula:

[0020] Determine the inclination angle of the well at the current position of the drill bit;

[0021] When the strata are tilted and downward, use the formula:

[0022] Determine the inclination angle of the well at the current position of the drill bit;

[0023] When the strata are inclined and upward, use the formula:

[0024] Find the inclination angle of the well at the current position of the drill bit.

[0025] This method enables timely adjustment of the drill bit's trajectory in horizontal sections of thin volcanic rock reservoirs, increasing the probability of the drill bit traversing the target window within the thin volcanic rock reservoir section.

[0026] In a second aspect, the present invention provides a drilling trajectory control system for horizontal wells in thin-layer volcanic rock, using the aforementioned method for drilling trajectory control of horizontal wells in thin-layer volcanic rock, including a geological model construction module, a drilling trajectory design module, and a drilling trajectory adjustment module;

[0027] The geological model building module is used to build a geological model of the thin-layer volcanic rock reservoir in the target block;

[0028] The drilling trajectory design module is used to design the initial drilling trajectory of horizontal wells;

[0029] The drilling trajectory adjustment module is used to adjust the direction and angle of the drill bit during the drilling process.

[0030] This setting improves the efficiency of the drilling trajectory control method for horizontal wells in thin-layer volcanic rock.

[0031] In a third aspect, the present invention provides a drilling trajectory control device for a horizontal well in thin volcanic rock, comprising at least one processor and a memory communicatively connected to the at least one processor; the memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor to enable the at least one processor to execute the aforementioned drilling trajectory control method for a horizontal well in thin volcanic rock.

[0032] This setting improves the ease of use of the drilling trajectory control method for horizontal wells in thin volcanic rock layers.

[0033] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0034] 1. This invention provides a method for controlling the drilling trajectory of horizontal wells in thin-layer volcanic rock. Based on drilling, logging, and 3D seismic data, a geological model of the thin-layer volcanic rock reservoir in the target block is established. The location and depth of each target point in the horizontal section of the thin-layer volcanic rock reservoir are determined based on this geological model. An initial drilling trajectory is designed according to the reservoir development in the horizontal section of the thin-layer volcanic rock. During drilling, the drilling trajectory is adjusted and optimized in a timely manner based on logging, elemental logging, formation occurrence, and the top and bottom positions and depths of the reservoir in the geological model of the thin-layer volcanic rock reservoir development. This allows the drill bit to quickly and accurately traverse the target windows of the thin-layer volcanic rock reservoir. This method improves the encounter rate of high-quality volcanic rock reservoirs, is beneficial for increasing the productivity of single-well volcanic rock, and provides a guarantee for large-scale reserve growth in volcanic rock.

[0035] 2. This invention provides a drilling trajectory control system for horizontal wells in thin-layer volcanic rock formations, using the aforementioned method for drilling trajectory control in horizontal wells in thin-layer volcanic rock formations. The system includes a geological model construction module, a drilling trajectory design module, and a drilling trajectory adjustment module. The geological model construction module is used to construct a geological model of the thin-layer volcanic rock reservoir in the target block. The drilling trajectory design module is used to design the initial drilling trajectory of the horizontal well. The drilling trajectory adjustment module is used to adjust the direction and angle of the drill bit during drilling. This design improves the efficiency of the drilling trajectory control method for horizontal wells in thin-layer volcanic rock formations.

[0036] 3. This invention provides a drilling trajectory control device for horizontal wells in thin-layer volcanic rock, comprising a processor, a memory, and a bus. The memory stores instructions and data read by the processor, and the processor is used to call the instructions and data in the memory to execute the aforementioned drilling trajectory control method for horizontal wells in thin-layer volcanic rock. The bus connects the various functional components for information transmission. This configuration improves the ease of use of the drilling trajectory control method for horizontal wells in thin-layer volcanic rock. Attached Figure Description

[0037] Figure 1 This is a single-well composite columnar section of the target block provided in Embodiment 1 of the present invention.

[0038] Figure 2 This is a cross-sectional view of the time-domain porosity inversion results of the thin-layer volcanic rock reservoir in the study area provided in Example 1 of the present invention.

[0039] Figure 3 This is a composite profile of the initial trajectory of a horizontal well, obtained by overlaying the porosity inversion results of the thin-layer volcanic rock reservoir depth domain in Example 1 of this invention.

[0040] Figure 4 This is a cross-sectional view of the initial trajectory of a horizontal well superimposed on a geological model of a thin-layer volcanic rock reservoir in the study area provided in Example 1 of this invention.

[0041] Figure 5 This is a cross-sectional view of the horizontal well drilling trajectory overlaid with the porosity inversion results of the thin-layer volcanic rock reservoir depth domain in the study area provided in Example 1 of this invention.

[0042] Figure 6 This is a composite columnar section of a horizontal well in the study area of ​​the thin-layer volcanic rock reservoir provided in Example 1 of this invention. Detailed Implementation

[0043] The present invention will now be described in further detail with reference to specific embodiments. However, this should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0044] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of the present invention is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the present invention or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a particular device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on the present invention.

[0045] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but that it can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0046] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0047] Furthermore, in the description of the embodiments of the present invention, "several", "more than", and "a number of" represent at least two. The number can be any number, such as 2, 3, 4, 5, 6, 7, 8, or 9, and can even exceed nine.

[0048] Furthermore, in the description of the technical solution of this invention, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "provided with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0049] Example 1

[0050] As attached Figure 1-6 As shown, this embodiment provides a method for controlling the drilling trajectory of a horizontal well in thin-layer volcanic rock, including the following steps: S1: Using drilling, logging, and 3D seismic data of the target block, a geological model of the thin-layer volcanic rock reservoir in the target block is established. The geological model includes parameters such as burial depth, lithology, stratigraphic occurrence, fault development, and reservoir thickness; S2: Based on the geological model of the thin-layer volcanic rock reservoir in the target block, the location and depth of each target point in the horizontal section of the thin-layer volcanic rock reservoir are determined, and the initial drilling trajectory of the horizontal well is designed based on each target point; S3: During drilling, the drilling encounter is judged based on the changes in drilling logging data and drilling elemental logging data, combined with the reservoir thickness and stratigraphic occurrence of the thin-layer volcanic rock reservoir in the target block, and the drilling trajectory is adjusted accordingly. Potassium, sodium, and silicon elements in the drilling elemental logging data are assigned weight values ​​respectively.

[0051] like Figure 1 As shown, the volcanic reservoir is divided into upper and lower sections. The upper section is a fractured basalt reservoir, and the lower section is a porous volcanic clastic reservoir. The lower section is the main target section for horizontal wells. The logging curves of this reservoir section are characterized by low gamma ray, low resistivity, high acoustic intensity, high neutron density, low density, and high porosity. Figure 2 As shown, the volcanic rock strata generally exhibit a reflection pattern of two peaks sandwiching a trough. The lower reservoirs are relatively stable in lateral distribution, but there are local variations in thickness. Furthermore, when faults are developed, the characteristics of in-phase axis faulting are obvious.

[0052] First, a geological model of the thin-layer volcanic rock reservoir in the target block is established based on drilling, logging, and 3D seismic data. Then, the location and depth of each target point in the horizontal section of the thin-layer volcanic rock reservoir are determined based on the geological model. The initial drilling trajectory is designed according to the development of the reservoir in the horizontal section of the thin-layer volcanic rock. During drilling, the drilling trajectory of the horizontal well in the thin-layer volcanic rock is adjusted and optimized in a timely manner based on the logging-while-drilling, elemental logging, formation occurrence, and the location and burial depth of the top and bottom of the reservoir in the geological model of the thin-layer volcanic rock reservoir development. This allows the drill bit to quickly and accurately pass through the target window of the thin-layer volcanic rock reservoir. This method improves the drilling rate of high-quality volcanic rock reservoirs, which is conducive to improving the productivity of single wells in volcanic rock and provides a guarantee for large-scale reserve increase of volcanic rock.

[0053] Step S1 includes: S11: Obtaining the vertical development characteristics of thin-layer volcanic rock reservoirs in the target block using single-well drilling, logging, and 3D seismic data; S12: Obtaining the vertical and horizontal development characteristics of thin-layer volcanic rock reservoirs in the target block through the vertical development characteristics of thin-layer volcanic rock reservoirs in each single well; S13: Establishing a geological model of thin-layer volcanic rock reservoirs in the target block based on the vertical and horizontal development characteristics of thin-layer volcanic rock reservoirs in the target block.

[0054] In step S12, the vertical and horizontal development characteristics of the thin-layer volcanic rock reservoir in the target block are obtained by volcanic rock impedance inversion or porosity property prediction.

[0055] In step S13, the geological model of the thin-layer volcanic rock reservoir of the target block is obtained by time-depth conversion of the volcanic rock impedance inversion or porosity property prediction results.

[0056] In step S2, each target point includes target point A, target point B, and target point K. Target point A is the starting position of the drill bit entering the thin volcanic rock horizontal reservoir section, target point B is the ending position of the drill bit in the thin volcanic rock horizontal reservoir section, and target point K is the control point between target point A and target point B. The selection of target point K is based on at least one of the following factors: lithological changes, fault development degree, and stratigraphic occurrence changes.

[0057] Preferably, lithological change refers to abrupt changes in lithology, such as the boundary between volcanic rock and metamorphic rock, which can be used as the selection location for K-target points; fault development degree refers to the location where faults are relatively well developed in the rock strata, and when the fault displacement is greater than or equal to 20m, it can be used as the selection location for K-target points; stratigraphic attitude change refers to the location where the strata change from updip to downdip or from downdip to updip, and when the strata change from updip to downdip or from downdip to updip, it can be used as the selection location for K-target points. By selecting K-target points, the drilling trajectory of the drill bit is connected through each target point, which increases the probability of the drill bit staying in the reservoir.

[0058] like Figure 3-4 As shown, from right to left are the wellhead, target points A, K, and B. A fault is developed in the middle of the profile, and the faulting characteristics of the upper and lower plate reservoirs are clear. Target point K is designed near the right side of the fault. The coordinates and vertical depth values ​​of the reservoir center points in the horizontal section of target points A, K, and B are read in sequence to design the initial drilling trajectory of the volcanic rock horizontal well. Then, the initial drilling trajectory of the volcanic rock horizontal well is loaded into the depth domain porosity inversion profile and the geological model of volcanic rock reservoir development.

[0059] In step S3, the logging-while-drilling data includes natural gamma curves and resistivity curves, and the elements in the elemental logging-while-drilling data include potassium, sodium, and silicon.

[0060] In the elemental logging data while drilling, potassium, sodium and silicon are assigned weight values ​​respectively, wherein the weight value of potassium is preset to 0.5, the weight value of sodium is preset to 0.3 and the weight value of silicon is preset to 0.2.

[0061] Because the composition of potassium, sodium, and silicon in volcanic rocks differs significantly from their composition in other rock types, pre-setting weight values ​​allows for the differentiation of volcanic rock lithology from core samples of other rock types based on elemental logging data. This improves the accuracy of determining drill bit encounters. When the drill bit encounters lithology that changes from basalt to volcanic clastic breccia and then to tuff, the natural gamma curve value first rises to 60 API and then falls to 50 API. The resistivity curve value decreases significantly, from 150 Ω to 50 Ω. The potassium content decreases significantly, from 1.5% to 0.5%, the sodium content increases, from 1% to 4%, and the silicon content decreases, from 40% to 35%.

[0062] In step S3, the drilling situation of the drill bit is the well inclination angle of the drill bit's location, which is expressed by the formula:

[0063] Seek;

[0064] Where θ is the well inclination angle at the drill bit's location, α is the apparent dip angle of the formation, and H... 底 H represents the depth of the reservoir bottom boundary. 顶 L represents the depth of the top boundary of the reservoir, and L is the distance between the current position of the drill bit and the target drilling position.

[0065] When the strata are horizontal, the apparent dip angle α is 0, using the formula:

[0066] Determine the inclination angle of the well at the current position of the drill bit;

[0067] When the strata are tilted and downward, use the formula:

[0068] Determine the inclination angle of the well at the current position of the drill bit;

[0069] When the strata are inclined and upward, use the formula:

[0070] Find the inclination angle of the well at the current position of the drill bit.

[0071] As attached Figure 5 As shown, when the drill bit reaches target point A in the volcanic rock reservoir section, the thickness difference between the top and bottom of the reservoir at control point K1 is 34.8m. Therefore, the vertical thickness of the reservoir center at control point K1 from the top and bottom of the reservoir is 34.8 / 2 = 17.4m. The straight-line distance from target point A to control point K1 is 363m, and the formation at the location from target point A to control point K1 is in a downdip direction. Therefore, using the formula:

[0072] The angle between the current drill bit position and the formation can be calculated to be 2.74°. Therefore, when drilling from target point A to control point K1, the angle between the current drill bit position and the formation should not be greater than 2.74°. Otherwise, the drill bit will penetrate the bottom boundary of the volcanic rock reservoir section at control point K1. If the angle between the current drill bit position and the formation is greater than 2.74°, the well inclination angle needs to be adjusted in time. If the angle between the current drill bit position and the formation is less than 2.74°, drilling can proceed according to the current well inclination angle.

[0073] This method enables timely adjustment of the drill bit's trajectory in horizontal sections of thin volcanic rock reservoirs, increasing the probability of the drill bit traversing the target window within the thin volcanic rock reservoir section.

[0074] Example 2

[0075] This embodiment provides a drilling trajectory control system for horizontal wells in thin volcanic rock formations, using a drilling trajectory control method for horizontal wells in thin volcanic rock formations, including a geological model construction module, a drilling trajectory design module, and a drilling trajectory adjustment module;

[0076] The geological model building module is used to build a geological model of the thin-layer volcanic rock reservoir in the target block;

[0077] The drilling trajectory design module is used to design the initial drilling trajectory of horizontal wells;

[0078] The drilling trajectory adjustment module is used to adjust the direction and angle of the drill bit during the drilling process.

[0079] This setting improves the efficiency of the drilling trajectory control method for horizontal wells in thin-layer volcanic rock.

[0080] Example 3

[0081] This embodiment provides a drilling trajectory control device for a horizontal well in thin volcanic rock, including at least one processor and a memory communicatively connected to the at least one processor; the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the drilling trajectory control method for a horizontal well in thin volcanic rock.

[0082] This setting improves the ease of use of the drilling trajectory control method for horizontal wells in thin volcanic rock layers.

[0083] 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 within the protection scope of the present invention.

Claims

1. A method for controlling the drilling trajectory of a horizontal well in a thin-layer volcanic rock formation, characterized in that, Includes the following steps: S1: Using drilling, logging and 3D seismic data of the target block, establish a geological model of the thin-layer volcanic rock reservoir of the target block. The geological model includes parameters such as burial depth, lithology, stratigraphic occurrence, fault development and reservoir thickness. S2: Based on the geological model of the thin-layer volcanic rock reservoir in the target block, determine the location and depth of each target point in the horizontal section of the thin-layer volcanic rock reservoir, and design the initial drilling trajectory of the horizontal well based on each target point. S3: During drilling, the drill bit encounters are assessed based on changes in logging-while-drilling data and elemental logging data, combined with the reservoir thickness and formation occurrence of the thin volcanic reservoir in the target block, and the drilling trajectory is adjusted accordingly. The potassium, sodium, and silicon elements in the drilling elemental logging data are assigned weight values ​​respectively.

2. The method for controlling the drilling trajectory of a horizontal well in a thin-layer volcanic rock as described in claim 1, characterized in that, Step S1 includes: S11: Utilize single-well drilling, logging, and 3D seismic data to obtain the vertical development characteristics of thin-layered volcanic reservoirs within the target block; S12: The vertical and horizontal development characteristics of thin-layer volcanic reservoirs in the target block are obtained by analyzing the vertical development characteristics of thin-layer volcanic reservoirs in each single well. S13: Establish a geological model of the thin-layer volcanic rock reservoir in the target block based on the vertical and horizontal development characteristics of the thin-layer volcanic rock reservoir in the target block.

3. The method for controlling the drilling trajectory of a horizontal well in a thin-layer volcanic rock as described in claim 2, characterized in that, In step S12, the vertical and horizontal development characteristics of the thin-layer volcanic rock reservoir in the target block are obtained by volcanic rock impedance inversion or porosity property prediction.

4. The method for controlling the drilling trajectory of a horizontal well in a thin-layer volcanic rock as described in claim 3, characterized in that, In step S13, the geological model of the thin-layer volcanic rock reservoir of the target block is obtained by time-depth conversion of the volcanic rock impedance inversion or porosity property prediction results.

5. The method for controlling the drilling trajectory of a horizontal well in a thin-layer volcanic rock as described in claim 1, characterized in that, In step S2, each target point includes target point A, target point B, and target point K. Target point A is the starting position of the drill bit entering the thin volcanic rock horizontal reservoir section, target point B is the ending position of the drill bit in the thin volcanic rock horizontal reservoir section, and target point K is the control point between target point A and target point B. The selection of target point K is based on at least one of the following factors: lithological changes, fault development degree, and stratigraphic occurrence changes.

6. The method for controlling the drilling trajectory of a horizontal well in a thin-layer volcanic rock as described in claim 1, characterized in that, In step S3, the logging-while-drilling data includes natural gamma curves and resistivity curves, and the elements in the elemental logging-while-drilling data include potassium, sodium, and silicon.

7. The method for controlling the drilling trajectory of a horizontal well in a thin-layer volcanic rock as described in claim 6, characterized in that, In the elemental logging data while drilling, potassium, sodium and silicon are assigned weight values ​​respectively, wherein the weight value of potassium is preset to 0.45-0.55, the weight value of sodium is preset to 0.25-0.35 and the weight value of silicon is preset to 0.15-0.25, and the sum of the weight values ​​of each parameter is 1.

8. The method for controlling the drilling trajectory of a horizontal well in a thin-layer volcanic rock as described in claim 1, characterized in that, In step S3, the drilling situation of the drill bit is the well inclination angle of the drill bit's location, which is expressed by the formula: Seek; Where θ is the well inclination angle at the drill bit's location, α is the apparent dip angle of the formation, and H... 底 H represents the depth of the reservoir bottom boundary. 顶 L represents the depth of the top boundary of the reservoir, and L is the distance between the current position of the drill bit and the target drilling position.

9. A drilling trajectory control system for horizontal wells in thin-layer volcanic rock, characterized in that, The drilling trajectory control method for a horizontal well in thin volcanic rock as described in claim 8 includes a geological model construction module, a drilling trajectory design module, and a drilling trajectory adjustment module. The geological model building module is used to build a geological model of the thin-layer volcanic rock reservoir in the target block; The drilling trajectory design module is used to design the initial drilling trajectory of horizontal wells; The drilling trajectory adjustment module is used to adjust the direction and angle of the drill bit during the drilling process.

10. A drilling trajectory control device for horizontal wells in thin-layer volcanic rock, characterized in that, It includes at least one processor and a memory communicatively connected to the at least one processor; the memory stores instructions executable by the at least one processor, which, when executed by the at least one processor, enable the at least one processor to perform the drilling trajectory control method for a horizontal well in thin-layer volcanic rock as described in any one of claims 1 to 8.

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