Shale gas well sublayer division method, device, equipment and storage medium

Abstract

The present disclosure relates to a method, device, equipment and storage medium for dividing shale gas well sublayers, and belongs to the field of shale exploration and development. The method includes: obtaining shale gas well data; determining the geological characteristics of the shale gas well in the vertical direction based on vertical well logging data and core data; determining the sublayer division scheme of the shale gas well in the vertical direction based on the geological characteristics of the shale gas well in the vertical direction, three-dimensional depth domain data body, vertical well logging data and vertical well coordinates; determining the geological characteristics of the sublayer based on the sublayer division scheme of the shale gas well in the vertical direction; dividing the sublayers of the shale gas well in the horizontal direction based on the geological characteristics of the sublayer, horizontal well logging data, horizontal well trajectory data, horizontal well coordinates, core filling elevation data and three-dimensional depth domain data body.

Description

Technical Field

[0001] The present invention relates to the field of shale gas exploration and development, and in particular to a method, device, equipment and storage medium for dividing a horizontal section of a shale gas well into small layers. Background Art

[0002] Shale gas is a natural gas found in shale and is an important energy resource. The gas production of a shale gas well is related to the development of the drilled layer (or target layer, oil and gas layer). The better the development of the drilled layer, the greater the amount of shale gas stored in the drilled layer and the greater the gas production.

[0003] When extracting shale gas, a vertical well is first drilled to reach the drilling layer. To increase the production of shale gas, a horizontal well is drilled along the direction of the drilling layer. The contact area between the horizontal well and the drilling layer is larger, which increases the production of shale gas. The angle between the horizontal well and the vertical direction is smaller.

[0004] The development degree of the same drilled layer at different positions is different, that is, the drilled layer is divided into different sub-layers. In the related art, the division of sub-layers is mainly based on the division method of vertical wells, that is, only the development degree of the drilled layer in the vertical direction is considered, but the development degree and distribution characteristics of the drilled layer in the horizontal direction (that is, the trend of the drilled layer) are not considered. There is a large error in the division result of the sub-layer, and the accuracy of the sub-layer division is low. Summary of the invention

[0005] The embodiments of the present disclosure provide a shale gas well sub-layer division method, device, equipment and storage medium to improve the accuracy of sub-layer division. The technical solution is as follows:

[0006] In one aspect, the present disclosure provides a method for dividing shale gas well into sub-layers, the method comprising:

[0007] Acquire shale gas well data, the shale gas well data including core data for reflecting the development degree of the drilled layer, vertical well logging data for reflecting the geological characteristics of the formation at different depths, vertical well coordinates, horizontal well logging data for reflecting the geological characteristics of the formation in the horizontal direction, horizontal well trajectory data, horizontal well coordinates, shale gas well core filling elevation data, and three-dimensional depth domain data volume for representing the three-dimensional structure of the formation;

[0008] Determining the geological characteristics of the shale gas well in the vertical direction based on the vertical well logging data and the core data;

[0009] Based on the geological characteristics of the shale gas well in the vertical direction, the three-dimensional depth domain data volume, the vertical well logging data and the vertical well coordinates, a sub-layer division scheme of the shale gas well in the vertical direction is determined, wherein the sub-layer division scheme of the shale gas well in the vertical direction represents the geological characteristics of the shale gas well in the vertical direction;

[0010] Based on the vertical sub-layer division scheme of the shale gas well, determine the geological characteristics of the sub-layers in the drilled layer;

[0011] Based on the geological characteristics of the small layers in the drilled layer, the horizontal well logging data, the horizontal well trajectory data, the horizontal well coordinates, the core filling elevation data and the three-dimensional depth domain data volume, the drilled layer of the shale gas well is divided into small layers in the horizontal direction.

[0012] In an implementation of the embodiment of the present disclosure, determining the geological characteristics of the shale gas well in the vertical direction based on the vertical well logging data and the core data includes:

[0013] Determine the core position based on the vertical well logging data and the core data, wherein the core position indicates the depth of the core in the formation;

[0014] Based on the vertical well logging data, the core data and the core position, the geological characteristics of the shale gas well in the vertical direction are determined.

[0015] In an implementation of the embodiment of the present disclosure, after determining the geological characteristics of the shale gas well in the vertical direction based on the vertical well logging data, the core data and the core position, the method further includes:

[0016] Comparing the geological characteristics in the vertical direction with the geological characteristics of adjacent wells to determine the correctness of the geological characteristics of the shale gas well in the vertical direction;

[0017] If the geological characteristics of the shale gas well in the vertical direction are correct, the geological characteristics of the shale gas well in the vertical direction are determined as the geological characteristics of the shale gas well in the vertical direction;

[0018] If the geological characteristics of the shale gas well in the vertical direction are incorrect, the geological characteristics of the shale gas well in the vertical direction are re-determined.

[0019] In an implementation of the embodiment of the present disclosure, the method of determining a sub-layer division scheme of the shale gas well in the vertical direction based on the geological characteristics of the shale gas well in the vertical direction, the three-dimensional depth domain data volume, the vertical well logging data and the vertical well coordinates includes:

[0020] Based on the geological characteristics of the shale gas well in the vertical direction, a division standard is determined, wherein the division standard is used to divide the drilled layer of the shale gas well into small layers in the vertical direction;

[0021] Based on the division standard, the three-dimensional depth domain data volume, the vertical well logging data and the vertical well coordinates, a sub-layer division scheme for the shale gas well in the vertical direction is determined, and the sub-layer division scheme for the shale gas well in the vertical direction includes sub-layer position and thickness.

[0022] In an implementation of the embodiment of the present disclosure, determining the geological characteristics of the small layers in the drilled layer based on the three-dimensional depth domain data volume and the small layer division scheme of the shale gas well in the vertical direction includes:

[0023] Based on the three-dimensional depth domain data volume and the vertical sub-layer division scheme of the shale gas well, determine the position and thickness of each sub-layer in the drilled layer;

[0024] Based on the position of the sublayer, a sublayer phase feature is determined in the three-dimensional depth domain data volume, and the sublayer phase feature represents the geological characteristics of the sublayer.

[0025] In an implementation of the embodiment of the present disclosure, the sub-layers of the drilling layer of the shale gas well in the horizontal direction are divided based on the geological characteristics of the sub-layers, the horizontal well logging data, the horizontal well trajectory data, the horizontal well coordinates and the patching elevation data, including:

[0026] Determining the basis for dividing the sublayer in the horizontal direction based on the geological characteristics of the sublayer;

[0027] Based on the division basis of the small layer in the horizontal direction, a small layer three-dimensional model is constructed in the three-dimensional depth domain data volume, and the small layer three-dimensional model represents the relationship between the small layer characteristics and the horizontal well logging data, the horizontal well trajectory data and the horizontal well coordinates;

[0028] Based on the small layer three-dimensional model and the core filling elevation data, the drilled layer of the shale gas well is divided into small layers in the horizontal direction.

[0029] In one implementation of the embodiment of the present disclosure, the method further includes:

[0030] Compare the small layers in the horizontal direction of the shale gas well with the small layers in the vertical direction of the shale gas well to determine the division result of the small layers in the horizontal direction of the shale gas well;

[0031] Based on the division result, the sub-layers in the horizontal direction of the drilled layer of the shale gas well are determined.

[0032] On the other hand, the embodiment of the present disclosure provides a shale gas well sub-layer division device, the shale gas well sub-layer division device comprising:

[0033] an acquisition module configured to acquire shale gas well data, the shale gas well data including core data for reflecting the development degree of the drilled layer, vertical well logging data for reflecting the geological characteristics of the formation at different depths, vertical well coordinates, horizontal well logging data for reflecting the geological characteristics of the formation in the horizontal direction, horizontal well trajectory data, horizontal well coordinates, core filling elevation data of the shale gas well, and a three-dimensional depth domain data volume for representing the three-dimensional structure of the formation;

[0034] A first determination module is configured to determine the geological characteristics of the shale gas well in the vertical direction based on the vertical well logging data and the core data;

[0035] The second determination module is configured to determine a sub-layer division scheme of the shale gas well in the vertical direction based on the geological characteristics of the shale gas well in the vertical direction, the three-dimensional depth domain data volume, the vertical well logging data and the vertical well coordinates, wherein the sub-layer division scheme of the shale gas well in the vertical direction represents the geological characteristics of the shale gas well in the vertical direction;

[0036] A third determination module is configured to determine the geological characteristics of the small layers in the drilled layer based on the small layer division scheme of the shale gas well in the vertical direction;

[0037] The division module is configured to divide the small layers in the horizontal direction of the drilled layer of the shale gas well based on the geological characteristics of the small layers in the drilled layer, the horizontal well logging data, the horizontal well trajectory data, the horizontal well coordinates, the core elevation data and the three-dimensional depth domain data volume.

[0038] On the other hand, an embodiment of the present disclosure provides a computer device, the computer device comprising:

[0039] processor;

[0040] a memory for storing processor-executable instructions;

[0041] Wherein, the processor is configured to execute the shale gas well sub-layer division method as described in any one of the above claims.

[0042] On the other hand, an embodiment of the present disclosure provides a storage medium, in which a computer program is stored. The computer program is executed by a processor to implement any of the above-mentioned methods for dividing shale gas wells into small layers.

[0043] The technical solution provided by the embodiments of the present disclosure has the following beneficial effects:

[0044] In the disclosed embodiment, a sub-layer division scheme of a shale gas well in the vertical direction is determined based on the data of the shale gas well, and the sub-layers of the drilled layer of the shale gas well in the horizontal direction are divided in combination with the three-dimensional depth domain data volume and the geological characteristics of the drilled layer in the horizontal direction. That is, the division method considers both the development degree of the drilled layer in the vertical direction and the development degree of the drilled layer in the horizontal direction, thereby improving the accuracy of the sub-layer division result. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0046] Figure 1 It is a flow chart of a method for dividing shale gas well sublayers provided by an embodiment of the present disclosure;

[0047] Figure 2 It is a flow chart of a method for dividing shale gas well sublayers provided by an embodiment of the present disclosure;

[0048] Figure 3 This is a diagram of a vertical well sub-layer division scheme for a shale gas well in Sichuan provided by an embodiment of the present disclosure;

[0049] Figure 4 This is a schematic diagram of tracking the small layers in a shale gas well in Sichuan provided by an embodiment of the present disclosure;

[0050] Figure 5 This is a schematic diagram of the traversal of various sub-layers in a three-dimensional geological model of a horizontal well of a shale gas well in Sichuan provided by an embodiment of the present disclosure;

[0051] Figure 6 It is a block diagram of a shale gas well sub-layer division device provided by an embodiment of the present disclosure;

[0052] Figure 7 It is a block diagram of a computer device provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0053] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0054] Figure 1 Flow chart of a method for dividing shale gas well layers provided by an embodiment of the present disclosure. Figure 1 , the method comprising:

[0055] Step S101: Acquire shale gas well data.

[0056] Among them, shale gas well data include core data used to reflect the development degree of the drilled layer, vertical well logging data used to reflect the geological characteristics of the formation at different depths, vertical well coordinates, horizontal well logging data used to reflect the geological characteristics of the formation in the horizontal direction, horizontal well trajectory data, horizontal well coordinates, shale gas well core elevation data, and three-dimensional depth domain data volume used to represent the three-dimensional structure of the formation.

[0057] The core-filling altitude data is the core-filling altitude. The distance from the drilling platform to the ground is the core-filling altitude. The core-filling altitude is equal to the ground altitude plus the core-filling height.

[0058] In the disclosed embodiments, during the exploration and development of shale gas, drilling work needs to be carried out according to the geologically designed stratigraphic level and depth, and a coring tool needs to be lowered into the well to drill out a rock sample, which is called a core. The core is analyzed by microscopic or spectroscopic techniques to obtain core data. The core data includes the porosity and organic content of the core, and the core data can reflect the degree of development of the drilled layer, that is, the gas content of the drilled layer. Analyzing the core is a necessary means to understand the geological characteristics of the drilled layer.

[0059] In the disclosed embodiment, vertical well logging data and vertical well coordinates can be obtained during the process of digging the vertical well. The vertical well logging data includes electrochemical characteristics, conductive characteristics, acoustic characteristics, and radioactive characteristics of the formation through which the vertical well passes. The vertical well logging data can be used to represent the geological characteristics of the formation. Exemplarily, the vertical well logging data can be obtained by measuring geophysical parameters.

[0060] The vertical well coordinates represent the coordinates of each point in the vertical well in the geodetic coordinate system, that is, the longitude and latitude of each point in the vertical well, and then combined with the depth of each point in the vertical well to determine the position of each point in the vertical well.

[0061] In the disclosed embodiment, horizontal well logging data, horizontal well trajectory data and horizontal well coordinates can be obtained during the excavation of the horizontal well. Among them, the horizontal well logging data includes the acoustic wave data, density data, resistivity data, organic matter content, etc. of the drilled layer, and the horizontal well logging data can reflect the geological characteristics of the drilled layer in the horizontal direction. The horizontal well trajectory data includes the well inclination and azimuth data of the horizontal well, and the horizontal well trajectory data is used to represent the trajectory of the horizontal well underground.

[0062] The horizontal well coordinates are also the coordinates of each point in the horizontal well in the geodetic coordinate system, combined with the depth to determine the position of each point in the horizontal well.

[0063] Step S102: Determine the vertical geological characteristics of the shale gas well based on vertical well logging data and core data.

[0064] In the disclosed embodiment, the vertical well logging data is measured by instruments during the logging process, and the core data is obtained by drilling cores and performing experimental analysis on the cores. That is, the core data may not be the same as the data obtained from the vertical well logging data. By comparing the vertical well logging data and the core data, it is determined whether there is a significant difference between the core data and the vertical well logging data. If there is a significant difference between the core data and the vertical well logging data, it is necessary to resample and analyze the core data, or re-measure the vertical well logging data. If the core data is not much different from the vertical well logging data, the core data and the vertical well logging data are combined to determine the geological characteristics of the shale gas well in the vertical direction.

[0065] Step S103: Based on the vertical geological characteristics of the shale gas well, the three-dimensional depth domain data volume, the vertical well logging data and the vertical well coordinates, determine the sub-layer division scheme of the shale gas well in the vertical direction, and the sub-layer division scheme of the shale gas well in the vertical direction represents the vertical geological characteristics of the shale gas well.

[0066] In the disclosed embodiment, the vertical well logging data obtained during the logging process can only reflect the geological characteristics of the shale gas well in the vertical direction, but cannot reflect the geological characteristics of the shale gas well in the horizontal direction. The three-dimensional depth domain data body is the stratigraphic structure of the underground strata in the three-dimensional coordinate system measured by seismic waves in the early stage of shale gas well construction, which can be used to represent the shape and trend of the strata in the three-dimensional coordinate system. The three-dimensional coordinate system refers to a coordinate system formed by combining the geodetic coordinate system with the depth, that is, the XY coordinates are the horizontal and vertical coordinates of the geodetic coordinates, and the Z coordinate is based on the depth as the coordinate axis. Combined with the three-dimensional depth domain data body, and through the geological characteristics of the shale gas well in the vertical direction, the vertical well logging data and the vertical well coordinates, the sub-layer division scheme of the shale gas well in the vertical direction is determined, which is convenient for the subsequent combination of the three-dimensional depth domain data body and the geological characteristics of the shale gas well in the horizontal direction to determine the sub-layer of the shale gas well in the horizontal direction.

[0067] Step S104: Based on the vertical sub-layer division scheme of the shale gas well, determine the geological characteristics of the sub-layers in the drilled layer.

[0068] In the disclosed embodiment, the geological characteristics of the sublayer in the drilled layer include the development degree and thickness of the sublayer.

[0069] Step S105: Divide the horizontal layers of the drilled layer of the shale gas well based on the geological characteristics of the drilled layers, horizontal well logging data, horizontal well trajectory data, horizontal well coordinates, core filling elevation data and three-dimensional depth domain data volume.

[0070] In the disclosed embodiments, in the three-dimensional depth domain data volume, the geological characteristics of the small layers in the drilled layer in the horizontal direction can be determined based on the geological characteristics of the small layers in the drilled layer, horizontal well logging data, horizontal well trajectory data, horizontal well coordinates, and core filling elevation data, and based on the geological characteristics, the small layers in the drilled layer of the shale gas well can be divided in the horizontal direction.

[0071] In the disclosed embodiment, a sub-layer division scheme of a shale gas well in the vertical direction is determined based on the data of the shale gas well, and the sub-layers of the drilled layer of the shale gas well in the horizontal direction are divided in combination with the three-dimensional depth domain data volume and the geological characteristics of the drilled layer in the horizontal direction. That is, the division method considers both the development degree of the drilled layer in the vertical direction and the development degree of the drilled layer in the horizontal direction, thereby improving the accuracy of the sub-layer division result.

[0072] Figure 2 Flow chart of a method for dividing shale gas well layers provided by an embodiment of the present disclosure. Figure 2 , the method comprising:

[0073] Step S201: Acquire shale gas well data.

[0074] Among them, shale gas well data include core data used to reflect the development degree of the drilled layer, vertical well logging data used to reflect the geological characteristics of the formation at different depths, vertical well coordinates, horizontal well logging data used to reflect the geological characteristics of the formation in the horizontal direction, horizontal well trajectory data, horizontal well coordinates, shale gas well core elevation data, and three-dimensional depth domain data volume used to represent the three-dimensional structure of the formation.

[0075] In the disclosed embodiment, vertical well logging data may include natural gamma (GR) curves, acoustic characteristic (AC) curves, electron concentration curves, density (DEN) curves, resistivity curves, organic matter content (TOC) curves, porosity curves, etc. along the vertical direction. These vertical well logging data can reflect the geological characteristics of the formation at different depths.

[0076] Step S202: Determine the core position based on the vertical well logging data and the core data. The core position indicates the depth of the core in the formation.

[0077] In the disclosed embodiment, during the core drilling process, the drill rod and the drill bit exert pressure on the formation, which may cause a certain degree of compression of the drill rod, resulting in a certain deviation between the actual core drilled depth and the designed core drilled depth.

[0078] Exemplarily, step S202 may include: finding geological features near the corresponding design depth (i.e., the depth of mining) in the vertical well logging data by comparing the vertical well logging data and the core data; comparing the geological features with the geological features represented by the core data; if the difference between the two is within a threshold range, it indicates that the core is in the formation at the depth; determining the actual formation where the core is located, i.e., the position of the core, based on the formation position; if the difference between the two is not within the threshold range, it indicates that the core is not in the formation, and it is necessary to re-acquire the core data, or re-sample the core, or re-acquire the vertical well logging data.

[0079] For example, for the TOC curve, when the TOC value difference between the vertical well logging data and the core data is less than 10%, it means that the TOC values ​​between 1 and 2 can be divided into one level, the TOC values ​​between 2 and 3 can be divided into one level, and the TOC values ​​greater than 3 can be divided into one level. When the TOC values ​​of the vertical well and the adjacent well at the same position are in the same level, and the change trend of the TOC curve in the vertical direction is consistent, it is considered that the geological characteristics of the adjacent well and the vertical well are within the threshold range.

[0080] Step S203: Determine the vertical geological characteristics of the shale gas well based on the vertical well logging data, core data and core position.

[0081] Exemplarily, step S203 may include: finding the core position in the vertical well logging data; determining the geological characteristics at the position in the vertical well logging data; determining the geological characteristics at different depths to determine the geological characteristics of the shale gas well in the vertical direction.

[0082] In the disclosed embodiment, multiple cores are drilled along the depth direction of the vertical well, and each core is analyzed to obtain the geological characteristics of the formation at different depths. Multiple cores are drilled at different positions at the same depth to avoid accidental effects on the accuracy of the core data measured in the experiment.

[0083] Exemplarily, step 203 may also include: comparing the geological characteristics of the vertical well and the adjacent wells; when the difference between the geological characteristics of the vertical well and the adjacent wells is within a threshold range, determining the geological characteristics of the shale gas well in the vertical direction; if the difference between the two is large, it is necessary to re-acquire the shale gas well data and re-determine the geological characteristics of the shale gas well in the vertical direction based on the shale gas well data.

[0084] For example, for the TOC curve, TOC values ​​between 1 and 2 can be divided into one level, TOC values ​​between 2 and 3 can be divided into one level, and TOC values ​​greater than 3 can be divided into one level. When the TOC values ​​of the vertical well and the adjacent well at the same location are in the same level and the change trend of the TOC curve in the vertical direction is consistent, it is considered that the difference in geological characteristics between the adjacent well and the vertical well is within the threshold range.

[0085] Step S204: Based on the geological characteristics of the shale gas well in the vertical direction, a division standard is determined, where the division standard is used to divide the drilled layer of the shale gas well into small layers in the vertical direction.

[0086] For example, step S204 may include: according to the geological characteristics of the shale gas well in the vertical direction, the geological characteristics whose geological characteristics change within the same range are divided into the same layer. That is, the geological characteristics are classified, and the geological characteristics in each category are within the same range, and the range is the standard for dividing the small layers.

[0087] In the disclosed embodiment, the geological characteristics of the drilled layer vary in the vertical direction, that is, the parameters reflecting the geological characteristics also vary, and the strata with relatively stable parameter variations can be divided into the same sub-layer.

[0088] Exemplarily, strata whose TOC values ​​in an organic matter content (TOC) curve vary within the same range are divided into the same sublayer.

[0089] Step S205: Determine a vertical sub-layer division scheme for the shale gas well based on the division standard, the three-dimensional depth domain data volume, the vertical well logging data and the vertical well coordinates.

[0090] Exemplarily, step S205 may include: determining the range of geological characteristics in each sublayer according to the division criteria; and determining the specific location of the sublayer according to the three-dimensional depth domain data volume, well logging data and vertical well coordinates; and determining the sublayer division scheme of the shale gas well in the vertical direction according to the specific location of the sublayer.

[0091] Exemplarily, according to the above-mentioned sub-layer division standard, strata with geological characteristics within the same range are divided into the same sub-layer.

[0092] Step S206: Determine the sub-layers in the drilled layer based on the three-dimensional depth domain data volume and the sub-layer division scheme of the shale gas well in the vertical direction.

[0093] Exemplarily, step S206 may include: dividing the strata with the same geological characteristics into the same sub-layer according to different geological characteristics; and then calibrating the thickness of the sub-layer according to the specific position of the sub-layer.

[0094] Figure 3 This is a vertical well sub-layer division scheme diagram of a shale gas well in Sichuan provided by the embodiment of the present disclosure. Figure 3In this shale gas well, the top boundary of the Wufeng Formation is the shell limestone of the Guanyinqiao Member, with a thickness of less than 1 meter. The carbonaceous siliceous shale of the Wufeng Formation below is the lower half of the finger-like peak of the natural gamma curve. The high GR is classified into the Longmaxi Formation with a thickness of 0.5 to 15 meters. The lithology of the 1st layer is black carbonaceous and siliceous shale. The GR at the bottom is the highest value in the Longmaxi Formation, between GR170 and 500 (API). The lower half of the highest GR value is the bottom boundary of the 1st layer. The three porosity curves (sonic, neutron, and density logging curves) are lens-shaped, with high siliceous mineral content and low clay content. The U / Th (uranium / thorium) value is greater than or equal to 1.25, and the thickness is 1 to 4 meters. The 2nd layer is thicker, with a lithology of black carbonaceous shale. The GR is lower than that of the 1st and 3rd layers, and is flat (quasi) box-shaped, similar to the 4th layer, with a GR of 140 to 180 (API). I), the three porosity curves are approximately overlapped, the siliceous mineral content is medium and the clay content is high, the U / Th (uranium / thorium) value is about 0.5, and the thickness is between 4 and 11m; the lithology of the 3rd layer is black carbonaceous and siliceous shale, the GR gyro-shaped protrudes from the 2nd and 4th layers, the GR is between 160 and 270 (API), with high acoustic characteristics and low density, the three porosity curves diverge slightly upward, the density increases slowly, the siliceous mineral content is low and the clay content is high, intercalated with calcareous siltstone, the U / Th (uranium / thorium) value is between 0.5 and 1.0, and the thickness is 3 to 9m; the thickness of the 4th layer is large, 6 to 25m, the GR is a box-shaped type relatively low and flat to the 3rd layer, 140 to 180 (API), the three porosity curves diverge upward, the density increases significantly, the siliceous mineral content is low and the clay content is high, and the U / Th (uranium / thorium) value is less than 0.5; Long Yi 2 The lithology of the sub-member is Longyi 2 The dark gray shale at the bottom and the underlying dragon 1 Gray-black shale boundary, GR and AC are generally lower than Longyi 1 , DEN is higher than Longyi overall 1 , thickness 100~150m.

[0095] Depend on Figure 3 It can be seen that in the same stratum, the geological characteristics of different sub-layers are also different. In the subsequent steps, the sub-layers are further divided according to their geological characteristics, so as to determine the drilling plan of the shale gas well according to the results of the sub-layer division.

[0096] Step S207: Based on the three-dimensional depth domain data volume and the small layer, determine the small layer phase characteristics, where the small layer phase characteristics represent the geological characteristics of the small layer.

[0097] Exemplarily, step S207 may include: finding the specific position of the sublayer in the three-dimensional depth domain data volume according to the geological characteristics of the sublayer; and then calibrating the phase characteristics of the sublayer according to the position of the sublayer in the three-dimensional depth domain data volume.

[0098] The three-dimensional depth domain data volume can characterize the three-dimensional structure of the stratum, and the extension direction of each small layer can be determined in the three-dimensional depth domain data volume. Among them, the seismic wave waveform and the amplitude of the seismic wave at the location of the stratum represent the phase characteristics. For example, on a three-dimensional seismic profile, the seismic waveforms are identical and continuous, and are considered to have the same phase characteristics.

[0099] Figure 4 This is a schematic diagram of tracking the small layers in a shale gas well in Sichuan provided by an embodiment of the present disclosure. Figure 4 , the Wufeng group is in the waveform with strong amplitude positive phase, the 2nd sublayer is in the waveform with zero phase, the 3rd sublayer is in the negative phase, and the 4th sublayer is in the negative phase. That is, the phase characteristics of each sublayer are different, and the geological characteristics of the sublayer can be determined based on the phase characteristics.

[0100] in Figure 4 The left side shows the seismic waveform of a small layer. Figure 4 The right side shows the small layers into which the shale gas wells are divided in the vertical direction.

[0101] Step S208: Determine the basis for sub-layer division based on the geological characteristics of the sub-layer.

[0102] In the embodiment of the present disclosure, the geological characteristics of the sub-layer in the horizontal direction are determined according to the geological characteristics of the sub-layer, and the standard for dividing the sub-layer is determined.

[0103] The basis for this division is the same as that for the vertical division. The geological characteristics are classified. The geological characteristics in each category are within the same range, which is the standard for sub-layer division.

[0104] Exemplarily, step S208 may include: according to the geological characteristics of the shale gas well in the horizontal direction, dividing the geological characteristics whose changes are within the same range into the same layer; determining the range of the geological characteristics in each sublayer according to the division criteria; and determining the basis for sublayer division according to the range of the geological characteristics.

[0105] Exemplarily, strata whose TOC values ​​in an organic matter content (TOC) curve vary within the same range are divided into the same sublayer.

[0106] Step S209: constructing a small layer three-dimensional model based on the small layer division basis, wherein the small layer three-dimensional model represents the relationship between the small layer characteristics and the horizontal well logging data, the horizontal well trajectory data and the horizontal well coordinates.

[0107] Exemplarily, step S209 may include: constructing a three-dimensional model of the sublayer and the geological characteristics of each sublayer based on the sublayer division standards and the three-dimensional depth domain data volume; and then determining the position of each sublayer based on the horizontal well logging data, horizontal well trajectory data and horizontal well coordinates.

[0108] In the embodiments of the present disclosure, a three-dimensional depth domain data volume can be stored in computer software. By inputting the basis for dividing small layers into the software through the three-dimensional depth domain data volume stored in the software, the position of each small layer can be intuitively obtained from the software.

[0109] Exemplarily, the computer software may be geological earthquake simulation software, such as Petrol software.

[0110] Step S210: Divide the drilled layer of the shale gas well into horizontal sub-layers based on the sub-layer three-dimensional model and the core filling elevation data.

[0111] Exemplarily, step S210 may include: determining the position of the sub-layer according to the sub-layer three-dimensional model; inputting the core elevation and the wellbore trajectory data (well depth, well inclination, azimuth) of the horizontal well into the sub-layer three-dimensional model to determine the elevation and thickness of the sub-layer; thereby determining the sub-layer in the horizontal direction of the drilling layer of the shale gas well.

[0112] For example, the core patch elevation data may represent the core patch elevation of each point in the shale gas well.

[0113] Figure 5 This is a schematic diagram of the traversal of various sub-layers in a three-dimensional geological model of a horizontal well of a shale gas well in Sichuan provided by an embodiment of the present disclosure. Figure 5 During the drilling process of the horizontal well, the trajectory of the horizontal well (the line with arrows in the figure) will fluctuate, that is, the trajectory of the horizontal well will pass back and forth in each small layer.

[0114] Figure 5 The horizontal axis represents the length of the well, that is, the length of the shale gas well in the trajectory direction, in meters; Figure 5 The ordinate represents the well depth, that is, the vertical length of the shale gas well, in meters. The first number of the ordinate represents the vertical distance from the wellhead, and the second number represents the altitude of the location.

[0115] Table 1 is a trajectory extension table of a horizontal well of a shale gas well in Sichuan provided by an embodiment of the present disclosure.

[0116] Table 1 Trajectory extension of a horizontal well in a shale gas well in Sichuan

[0117] Starting well depth (m) End well depth (m) Horizon Length(m) 3150 3165 1 15 3165 3195 Wufeng 30 3195 3290 1 95 3290 3450 2 160 3450 3900 1 450 3900 4010 2 110 4010 4250 1 240 4250 4650 2 400

[0118] In Table 1, the well depth indicates the distance that the shale gas well extends along the trajectory direction of the shale gas well.

[0119] In the disclosed embodiment, after the shale gas well is divided into small layers, the gas content of the small layers can be determined according to the degree of development of the small layers during the drilling process, and the drilling direction of the horizontal well can be controlled so that the horizontal well is always located in the small layer with a larger gas content, thereby increasing the gas production.

[0120] In the disclosed embodiment, the method further includes:

[0121] Compare the small layers in the horizontal direction of the shale gas well with the small layers in the vertical direction of the shale gas well to determine the division result of the small layers in the horizontal direction of the shale gas well;

[0122] Based on the division results, the sub-layers in the horizontal direction of the drilled layer of the shale gas well are determined.

[0123] In the disclosed embodiment, the logging response characteristics of the small layers in the horizontal direction of the shale gas well are compared and analyzed with the logging response characteristics of the small layers in the vertical direction of the shale gas well to determine whether the two are consistent. If the difference between the two is not large, it means that the division of the small layers in the horizontal direction of the drilled layer of the shale gas well is correct. If the difference between the two is large, it means that there may be errors in the division of the small layers in the horizontal direction of the drilled layer of the shale gas well, and it is necessary to re-determine the geological characteristics of the drilled layer in the horizontal direction, and combine the natural gamma curve characteristics of the drilling technology to determine whether the geological characteristics of the small layer are correct, and re-form a multi-small layer three-dimensional model to further correct the small layer division plan.

[0124] The method provided in the present disclosure can be used to determine the sub-layer division of a marine shale horizontal well.

[0125] The beneficial effects of the present disclosure are as follows: according to the division scheme of the present disclosure, the sub-layer division of the shale gas well in the horizontal direction can be carried out quickly and accurately, and the situation of the formation drilled by the present disclosure can be quickly judged according to the sub-layer division result. According to the formation drilling situation of multiple wells combined with the reservoir development situation, the horizontal well box of the block can be optimized to increase the single well production. This method not only reduces the cost of exploration and development but also reduces the risk of exploration and development.

[0126] The horizontal well sub-layer division method disclosed in the present invention can effectively reduce the difficulty of division and improve the accuracy of division. The logging response characteristics of the horizontal well after division are compared with the sub-layer logging response characteristics of the vertical well, and the degree of consistency is high. In the subsequent development process, the single well production of the horizontal well divided by the existing technology is improved, and the production cost is comprehensively reduced.

[0127] The vertical well division method in the related art has the following defects: Since the horizontal well trajectory fluctuates with the structure and the target body, and has an altitude difference, the horizontal section (horizontal direction) cannot be directly compared with the vertical well section (vertical direction) for small layer comparison. If comparison is required, the depth of the horizontal section needs to be corrected according to the vertical depth, but because the small layer is thin, the curve is in the shape of small segments after the depth correction is vertical depth. It is difficult to find similar feature points that can be compared when performing comparative stratification. The small layer stratification is very difficult and the accuracy is very low. The division method disclosed in the present invention is used to divide the small layers of the horizontal section of shale gas, and a scientific and accurate vertical well small layer division scheme is constructed. Relying on the vertical well small layer division scheme, a fine three-dimensional small layer structural model is constructed. The shale gas horizontal well trajectory is placed in the three-dimensional fine small layer structural model for small layer division. The characteristics of the horizontal well structure and the measure data during the drilling process are fully combined, and the accuracy of the small layer division is greatly improved, which has important guiding significance for the analysis of the control factors of high-yield wells and the exploration and development of shale gas.

[0128] Figure 6 is a block diagram of a shale gas well sub-layer division device provided by an embodiment of the present disclosure. Figure 6 , the device comprises:

[0129] The acquisition module 301 is configured to acquire shale gas well data, which includes core data for reflecting the development degree of the drilled layer, vertical well logging data for reflecting the geological characteristics of the formation at different depths, vertical well coordinates, horizontal well logging data for reflecting the geological characteristics of the formation in the horizontal direction, horizontal well trajectory data, horizontal well coordinates, shale gas well core filling elevation data, and a three-dimensional depth domain data volume for representing the three-dimensional structure of the formation;

[0130] The first determination module 302 is configured to determine the geological characteristics of the shale gas well in the vertical direction based on the vertical well logging data and the core data;

[0131] The second determination module 303 is configured to determine a sub-layer division scheme of the shale gas well in the vertical direction based on the geological characteristics of the shale gas well in the vertical direction, the three-dimensional depth domain data volume, the vertical well logging data and the vertical well coordinates, wherein the sub-layer division scheme of the shale gas well in the vertical direction represents the geological characteristics of the shale gas well in the vertical direction;

[0132] The third determination module 304 is configured to determine the geological characteristics of the small layers in the drilled layer based on the small layer division scheme of the shale gas well in the vertical direction;

[0133] The division module 305 is configured to divide the sub-layers in the horizontal direction of the drilled layer of the shale gas well based on the geological characteristics of the sub-layers in the drilled layer, horizontal well logging data, horizontal well trajectory data, horizontal well coordinates, core filling elevation data and three-dimensional depth domain data volume.

[0134] Optionally, the first determination module 302 is configured to determine the core position based on vertical well logging data and core data, where the core position indicates the depth of the core in the formation; and determine the vertical geological characteristics of the shale gas well based on the vertical well logging data, core data and core position.

[0135] Optionally, the first determination module 302 is also configured to compare the geological characteristics in the vertical direction with the geological characteristics of adjacent wells to determine the correctness of the geological characteristics of the shale gas well in the vertical direction; if the geological characteristics of the shale gas well in the vertical direction are correct, the geological characteristics of the shale gas well in the vertical direction are determined as the geological characteristics of the shale gas well in the vertical direction; if the geological characteristics of the shale gas well in the vertical direction are incorrect, the geological characteristics of the shale gas well in the vertical direction are re-determined.

[0136] Optionally, the second determination module 303 is configured to determine a division standard based on the geological characteristics of the shale gas well in the vertical direction, and the division standard is used to divide the drilled layer of the shale gas well into small layers in the vertical direction; based on the division standard, the three-dimensional depth domain data body, the vertical well logging data and the vertical well coordinates, determine the small layer division scheme of the shale gas well in the vertical direction, and the small layer division scheme of the shale gas well in the vertical direction includes the small layer position and thickness.

[0137] Optionally, the third determination module 304 is configured to determine the position and thickness of each sublayer in the drilled layer based on the three-dimensional depth domain data volume and the sublayer division scheme of the shale gas well in the vertical direction; based on the position of the sublayer, determine the sublayer phase characteristics in the three-dimensional depth domain data volume, and the sublayer phase characteristics represent the geological characteristics of the sublayer.

[0138] Optionally, the division module 305 is configured to determine the basis for the horizontal division of the sublayer based on the geological characteristics of the sublayer; construct a three-dimensional model of the sublayer in the three-dimensional depth domain data body based on the basis for the horizontal division of the sublayer, the three-dimensional model of the sublayer represents the relationship between the sublayer characteristics and the horizontal well logging data, the horizontal well trajectory data and the horizontal well coordinates; and divide the sublayers encountered by the shale gas well in the horizontal direction based on the three-dimensional model of the sublayer and the core filling elevation data.

[0139] In the embodiment of the present disclosure, the device further includes:

[0140] A comparison module 306 is configured to compare the sub-layers in the horizontal direction of the shale gas well with the sub-layers in the vertical direction of the shale gas well to determine the division result of the sub-layers in the horizontal direction of the shale gas well;

[0141] The fourth determination module 307 is configured to determine the sub-layers of the drilled layer of the shale gas well in the horizontal direction based on the division result.

[0142] It should be noted that: the shale gas well sub-layer division device provided in the above embodiment only uses the division of the above functional modules as an example when dividing the sub-layers. In actual applications, the above functional distribution can be completed by different functional modules as needed, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. In addition, the shale gas well sub-layer division device provided in the above embodiment and the shale gas well sub-layer division method embodiment belong to the same concept. The specific implementation process is detailed in the method embodiment and will not be repeated here.

[0143] Figure 7 400 is a block diagram of a computer device provided in an embodiment of the present disclosure. The computer device 400 may be a desktop computer, a server or other types of devices. Figure 7 , the computer device 400 may include one or more of the following components: a processing component 402 , a memory 404 , a power component 406 , a multimedia component 408 , an audio component 410 , an input / output (I / O) interface 412 , a sensor component 414 , and a communication component 416 .

[0144] The processing component 402 generally controls the overall operation of the computer device 400, such as operations associated with display, phone calls, data communications, camera operations, and recording operations. The processing component 402 may include one or more processors 420 to execute instructions to complete all or part of the steps of the above-mentioned method. In addition, the processing component 402 may include one or more modules to facilitate the interaction between the processing component 402 and other components. For example, the processing component 402 may include a multimedia module to facilitate the interaction between the multimedia component 408 and the processing component 402.

[0145] The memory 404 is configured to store various types of data to support operations on the computer device 400. Examples of such data include instructions for any software program or method operating on the computer device 400, contact data, phone book data, messages, pictures, videos, etc. The memory 404 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.

[0146] Power component 406 provides power to various components of computer device 400. Power component 406 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to computer device 400.

[0147] The multimedia component 408 includes a screen that provides an output interface between the computer device 400 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundaries of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation.

[0148] In some embodiments, the multimedia component 408 includes a front camera and / or a rear camera. When the computer device 400 is in an operating mode, such as a shooting mode or a video mode, the front camera and / or the rear camera can receive external multimedia data. Each front camera and the rear camera can be a fixed optical lens system or have a focal length and optical zoom capability.

[0149] The audio component 410 is configured to output and / or input audio signals. For example, the audio component 410 includes a microphone (MIC), and when the computer device 400 is in an operation mode, such as a call mode, a recording mode, and a speech recognition mode, the microphone is configured to receive an external audio signal. The received audio signal can be further stored in the memory 404 or sent via the communication component 416. In some embodiments, the audio component 410 also includes a speaker for outputting audio signals.

[0150] I / O interface 412 provides an interface between processing component 402 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include but are not limited to: a home button, a volume button, a start button, and a lock button.

[0151] The sensor assembly 414 includes one or more sensors for providing various aspects of status assessment for the computer device 400. For example, the sensor assembly 414 can detect the open / closed state of the computer device 400, the relative positioning of components, such as the display and keypad of the computer device 400, and the sensor assembly 414 can also detect the position change of the computer device 400 or a component of the computer device 400, the presence or absence of user contact with the computer device 400, the orientation or acceleration / deceleration of the computer device 400, and the temperature change of the computer device 400. The sensor assembly 414 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 414 may also include an optical sensor, such as a CMOS or CCD image sensor, for use in imaging software. In some embodiments, the sensor assembly 414 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0152] The communication component 416 is configured to facilitate wireless communication between the computer device 400 and other devices. In the disclosed embodiment, the communication component 416 can access a wireless network based on a communication standard, such as 2G, 3G, 4G or 5G, or a combination thereof, to achieve physical downlink control signaling detection. In an exemplary embodiment, the communication component 416 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. Optionally, the communication component 416 also includes an NFC module.

[0153] In an exemplary embodiment, the computer device 400 can be implemented by one or more software application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors or other electronic components to execute the above-mentioned shale gas well sublayer division method.

[0154] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 404 including instructions, and the instructions can be executed by a processor 420 of a computer device 400 to perform the above-mentioned shale gas well sub-layer division method. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0155] The above description is only an optional embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A method for dividing shale gas well into small layers, characterized in that: The method comprises: Acquire shale gas well data, the shale gas well data including core data for reflecting the development degree of the drilled layer, vertical well logging data for reflecting the geological characteristics of the formation at different depths, vertical well coordinates, horizontal well logging data for reflecting the geological characteristics of the formation in the horizontal direction, horizontal well trajectory data, horizontal well coordinates, shale gas well core filling elevation data, and three-dimensional depth domain data volume for representing the three-dimensional structure of the formation; Determining the geological characteristics of the shale gas well in the vertical direction based on the vertical well logging data and the core data; Based on the geological characteristics of the shale gas well in the vertical direction, the three-dimensional depth domain data volume, the vertical well logging data and the vertical well coordinates, determine a sub-layer division scheme of the shale gas well in the vertical direction, wherein the sub-layer division scheme of the shale gas well in the vertical direction represents the geological characteristics of the shale gas well in the vertical direction; Based on the vertical sub-layer division scheme of the shale gas well, determine the geological characteristics of the sub-layers in the drilled layer; Based on the geological characteristics of the small layers in the drilled layer, the horizontal well logging data, the horizontal well trajectory data, the horizontal well coordinates, the core filling elevation data and the three-dimensional depth domain data volume, the drilled layer of the shale gas well is divided into small layers in the horizontal direction.

2. The method for dividing shale gas well into sublayers according to claim 1, characterized in that: Determining the geological characteristics of the shale gas well in the vertical direction based on the vertical well logging data and the core data includes: Determine the core position based on the vertical well logging data and the core data, wherein the core position indicates the depth of the core in the formation; Based on the vertical well logging data, the core data and the core position, the geological characteristics of the shale gas well in the vertical direction are determined.

3. The method for dividing shale gas well into sublayers according to claim 2, characterized in that: After determining the geological characteristics of the shale gas well in the vertical direction based on the vertical well logging data, the core data and the core position, the method further includes: Comparing the geological characteristics in the vertical direction with the geological characteristics of adjacent wells to determine the correctness of the geological characteristics of the shale gas well in the vertical direction; If the geological characteristics of the shale gas well in the vertical direction are correct, determining the geological characteristics of the shale gas well in the vertical direction as the geological characteristics of the shale gas well in the vertical direction; If the geological characteristics of the shale gas well in the vertical direction are incorrect, the geological characteristics of the shale gas well in the vertical direction are re-determined.

4. The method for dividing shale gas well into sublayers according to any one of claims 1 to 3, characterized in that: The method of determining a sub-layer division scheme of the shale gas well in the vertical direction based on the geological characteristics of the shale gas well in the vertical direction, the three-dimensional depth domain data volume, the vertical well logging data and the vertical well coordinates includes: Based on the geological characteristics of the shale gas well in the vertical direction, a division standard is determined, wherein the division standard is used to divide the drilled layer of the shale gas well into small layers in the vertical direction; Based on the division standard, the three-dimensional depth domain data volume, the vertical well logging data and the vertical well coordinates, a sub-layer division scheme for the shale gas well in the vertical direction is determined, and the sub-layer division scheme for the shale gas well in the vertical direction includes sub-layer position and thickness.

5. The method for dividing shale gas well into sublayers according to any one of claims 1 to 3, characterized in that: The method of determining the geological characteristics of the small layers in the drilled layer based on the three-dimensional depth domain data volume and the small layer division scheme of the shale gas well in the vertical direction includes: Based on the three-dimensional depth domain data volume and the vertical sub-layer division scheme of the shale gas well, determine the position and thickness of each sub-layer in the drilled layer; Based on the position of the sublayer, a sublayer phase feature is determined in the three-dimensional depth domain data volume, and the sublayer phase feature represents the geological characteristics of the sublayer.

6. The method for dividing shale gas well into sublayers according to any one of claims 1 to 3, characterized in that: The method of dividing the drilled layer of the shale gas well into horizontal sublayers based on the geological characteristics of the sublayers, the horizontal well logging data, the horizontal well trajectory data, the horizontal well coordinates and the patching elevation data comprises: Determining the basis for dividing the sublayer in the horizontal direction based on the geological characteristics of the sublayer; Based on the division basis of the small layer in the horizontal direction, a small layer three-dimensional model is constructed in the three-dimensional depth domain data volume, and the small layer three-dimensional model represents the relationship between the small layer characteristics and the horizontal well logging data, the horizontal well trajectory data and the horizontal well coordinates; Based on the small layer three-dimensional model and the core filling elevation data, the drilled layer of the shale gas well is divided into small layers in the horizontal direction.

7. The method for dividing shale gas well into sublayers according to any one of claims 1 to 3, characterized in that: The method further comprises: Compare the small layers in the horizontal direction of the shale gas well with the small layers in the vertical direction of the shale gas well to determine the division result of the small layers in the horizontal direction of the shale gas well; Based on the division result, the sub-layers in the horizontal direction of the drilled layer of the shale gas well are determined.

8. A shale gas well sub-layer division device, characterized in that: The shale gas well sub-layer division device comprises: an acquisition module configured to acquire shale gas well data, the shale gas well data including core data for reflecting the development degree of the drilled layer, vertical well logging data for reflecting the geological characteristics of the formation at different depths, vertical well coordinates, horizontal well logging data for reflecting the geological characteristics of the formation in the horizontal direction, horizontal well trajectory data, horizontal well coordinates, core filling elevation data of the shale gas well, and a three-dimensional depth domain data volume for representing the three-dimensional structure of the formation; A first determination module is configured to determine the geological characteristics of the shale gas well in the vertical direction based on the vertical well logging data and the core data; The second determination module is configured to determine a sub-layer division scheme of the shale gas well in the vertical direction based on the geological characteristics of the shale gas well in the vertical direction, the three-dimensional depth domain data volume, the vertical well logging data and the vertical well coordinates, wherein the sub-layer division scheme of the shale gas well in the vertical direction represents the geological characteristics of the shale gas well in the vertical direction; A third determination module is configured to determine the geological characteristics of the small layers in the drilled layer based on the small layer division scheme of the shale gas well in the vertical direction; The division module is configured to divide the small layers in the horizontal direction of the drilled layer of the shale gas well based on the geological characteristics of the small layers in the drilled layer, the horizontal well logging data, the horizontal well trajectory data, the horizontal well coordinates, the core elevation data and the three-dimensional depth domain data volume.

9. A computer device, characterized in that: The computer device comprises: processor; a memory for storing processor-executable instructions; Wherein, the processor is configured to execute the shale gas well sublayer division method as described in any one of claims 1 to 7.

10. A storage medium, characterized in that: The storage medium stores a computer program, and the computer program is executed by a processor to implement the shale gas well sub-layer division method as described in any one of claims 1 to 7.

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