Method, system, storage medium and electronic device for reconstructing geosteering model while drilling

Abstract

The present invention relates to the technical field of underground resource drilling and production engineering, and in particular to a method, system, storage medium and electronic device for reconstructing a geosteering model while drilling, the method comprising: obtaining the azimuth logging data of each sector on each cross section of a wellbore; expanding the wellbore along the high side or north side of the wellbore to form a rectangle, mapping the azimuth logging data of each sector on each cross section of the wellbore into the rectangle, obtaining an imaging information image, and then calculating the formation dip of the formation where the wellbore is located; establishing a guidance profile of the formation within a preset range of the wellbore, the guidance profile including the current formation dip of the formation where the wellbore is located; adjusting the current formation dip of the formation where the wellbore is located in the guidance profile to the calculated formation dip of the formation where the wellbore is located. The accuracy of the guidance model reconstruction can be greatly improved, and it plays a good supporting role in the geosteering analysis and decision-making of complex oil and gas reservoirs.

Description

Background Art

[0002] In the process of horizontal well development in complex oil and gas reservoirs, the rate of drilling into the sweet spot in the reservoir is the basis for the success of horizontal well development. Due to the rapid structural changes in complex oil and gas reservoirs and the unclear implementation of reservoir structure, horizontal wells often drill out of the layer, resulting in a low rate of drilling into the sweet spot in the reservoir of horizontal wells, which seriously restricts the effect of horizontal well development in complex oil and gas reservoirs.

[0003] Geosteering technology is to use measurement while drilling instruments to obtain stratigraphic information around the measurement location during the drilling process, combine regional geological knowledge, compare geological information of adjacent wells, analyze and judge the relationship between the drill bit, well trajectory and formation, and provide a basis for adjusting the well trajectory to avoid or reduce the probability of breaking out of the layer, or to be able to immediately find and adjust back to the target formation when breaking out of the layer, reduce the length of breaking out of the layer, and achieve the purpose of increasing the reservoir encounter rate of horizontal wells.

[0004] Geological steering analysis and decision-making generally include comprehensive geological analysis before drilling, steering modeling, model reconstruction, trajectory analysis prediction and adjustment. Steering model reconstruction is a key link. It is the basis for adjusting the well trajectory to deepen and refine the understanding of geological conditions based on measured data during the drilling process. The more accurate the geological reconstruction model is, the more accurate the adjustment of the drilling trajectory will be, so as to maximize the reservoir encounter rate and achieve the goal of geological steering.

[0005] Generally, the reconstruction of the steering model is carried out by comparing and analyzing the logging curves without directional information, such as gamma while drilling and resistivity while drilling. The multi-solution is strong, and the uncertainty of the reconstruction of the steering model is large. It is difficult to determine from which direction the well trajectory approaches or passes through the formation interface. Figure 1 As shown, it brings serious challenges to geosteering in complex formations, and it is difficult to achieve a satisfactory drilling rate in the reservoir sweet spot. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a method, system, storage medium and electronic device for reconstructing a geosteering model while drilling in view of the deficiencies in the prior art.

[0007] The technical solution of a method for reconstructing a geosteering model while drilling of the present invention is as follows:

[0008] Divide any cross section of the wellbore into multiple sectors evenly;

[0009] Calculating the azimuth logging while drilling data of each sector on the cross section according to the azimuth logging while drilling data of at least two azimuths on the cross section until the azimuth logging while drilling data of each sector on each cross section of the wellbore is obtained;

[0010] Expand the wellbore along the high side or the north side of the wellbore to form a rectangle, use the measured depth of the wellbore trajectory as the ordinate, and map the azimuth logging data of each sector on each cross section of the wellbore into the rectangle according to a preset color template to obtain an imaging information image;

[0011] Calculating the formation dip angle of the formation where the wellbore is located according to the imaging information image;

[0012] Establishing a steering profile of a formation within a preset range of the wellbore, wherein the steering profile includes a current formation dip angle of the formation where the wellbore is located;

[0013] The current formation dip of the formation where the wellbore is located in the steering section is adjusted to the calculated formation dip of the formation where the wellbore is located.

[0014] The beneficial effects of the method for reconstructing a geosteering model while drilling of the present invention are as follows:

[0015] It can greatly improve the accuracy of the reconstruction of the steering model and play a good supporting role in the geological steering analysis and decision-making of complex oil and gas reservoirs.

[0016] The technical solution of a while-drilling geosteering model reconstruction system of the present invention is as follows:

[0017] It includes a division module, a first calculation module, a mapping module, a second calculation module, a building module and an adjustment module;

[0018] The division module is used to: divide any cross section of the wellbore into multiple sectors evenly;

[0019] The first calculation module is used to calculate the azimuth logging while drilling data of each sector on the cross section according to the azimuth logging while drilling data of at least two azimuths on the cross section, until the azimuth logging while drilling data of each sector on each cross section of the wellbore is obtained;

[0020] The mapping module is used to: expand the wellbore along the high side or the north side of the wellbore to form a rectangle, use the measured depth of the wellbore trajectory as the ordinate, and map the azimuth logging while drilling data of each sector on each cross section of the wellbore into the rectangle according to a preset color template to obtain an imaging information image;

[0021] The second calculation module is used to calculate the formation dip angle of the formation where the wellbore is located according to the imaging information image;

[0022] The establishment module is used to: establish a steering profile of a formation within a preset range of the wellbore, wherein the steering profile includes a current formation dip angle of the formation where the wellbore is located;

[0023] The adjustment module is used to adjust the current formation dip of the formation where the wellbore is located in the steering section to the calculated formation dip of the formation where the wellbore is located.

[0024] The beneficial effects of the geosteering model reconstruction system while drilling of the present invention are as follows:

[0025] It can greatly improve the accuracy of the reconstruction of the steering model and play a good supporting role in the geological steering analysis and decision-making of complex oil and gas reservoirs.

[0026] A storage medium of the present invention stores instructions, and when a computer reads the instructions, the computer executes any one of the above-mentioned methods for reconstructing a geosteering model while drilling.

[0027] An electronic device of the present invention comprises a processor and the above-mentioned storage medium, wherein the processor executes instructions in the storage medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The following is a schematic diagram showing that three situations may cause the same logging curve changes;

[0029] Figure 2 A schematic flow chart of a method for reconstructing a geosteering model while drilling according to an embodiment of the present invention;

[0030] Figure 3 It is the distance relationship diagram between each sector and the wellbore center;

[0031] Figure 4 is a schematic diagram of the interface;

[0032] Figure 5 It is a schematic diagram of each sector along the high side or north side of the wellbore;

[0033] Figure 6 It is a display diagram of synthetic imaging information;

[0034] Figure 7 This is a schematic diagram for calculating the formation dip;

[0035] Figure 8 This is a schematic diagram of the formation dip extraction module;

[0036] Fig. 9 This is a schematic diagram of the module for displaying the results of formation dip extraction;

[0037] Fig.10 It is a schematic diagram of the reconstruction module of the formation dip-assisted steering model;

[0038] Fig.11 Schematic diagram of gamma imaging while drilling for azimuthal gamma simulation while drilling for Well CX-1H;

[0039] Fig.12 Schematic diagram of extracting formation dip from gamma imaging while drilling for Well CX-1H;

[0040] Fig.13 The present invention is a structural schematic diagram of a system for reconstructing a geosteering model while drilling according to an embodiment of the present invention. DETAILED DESCRIPTION

[0041] like Figure 2 As shown, a method for reconstructing a geosteering model while drilling according to an embodiment of the present invention comprises the following steps:

[0042] S1. Divide any cross section of the wellbore into multiple sectors evenly;

[0043] S2, calculating the azimuth logging while drilling data of each sector on the cross section according to the azimuth logging while drilling data of at least two azimuths on the cross section, until the azimuth logging while drilling data of each sector on each cross section of the wellbore is obtained;

[0044] Wherein, azimuth logging data while drilling in at least two directions are obtained, the number of directions is an integer index of 2, such as 2, 4, 8, 16, etc., and each direction is evenly arranged around the wellbore in sequence.

[0045] For the specific process of calculating the azimuth logging while drilling data of each sector on the cross section based on the azimuth logging while drilling data of at least two azimuths on the cross section, refer to the explanation of S12 below.

[0046] Among them, the interpretation of the while-drilling geological steering model specifically refers to the public documents of the invention patent with application number "202210638287.5" and subject name "Geological steering method, device and storage medium", which will not be repeated here.

[0047] When there are only two positions of LWD data, these two positions must be located in the upper and lower positions; when there are only four positions of information, they should be the upper, lower, left and right positions; when there are multiple positions, they should include the upper, lower, left and right positions. In general, due to the limitation of downhole information transmission speed, LWD data of no more than 4 positions are generally uploaded in real time.

[0048] S3, expanding the wellbore along the high side or north side of the wellbore to form a rectangle, using the measured depth of the wellbore trajectory as the ordinate, and mapping the while-drilling azimuth logging data of each sector on each cross section of the wellbore into the rectangle according to a preset color template to obtain an imaging information image;

[0049] S4. Calculate the formation dip angle of the formation where the wellbore is located according to the imaging information image. For the specific process, refer to the explanation of S14.

[0050] S5. Establish a guidance profile of the formation within the preset range of the wellbore, and the guidance profile includes the current formation inclination of the formation where the wellbore is located. For specific reference, please refer to the public documents of the invention patent with application number "202210638287.5" and subject name "Geological guidance method, device and storage medium", which will not be repeated here.

[0051] S6. Adjust the current formation dip of the formation where the wellbore is located in the steering section to the calculated formation dip of the formation where the wellbore is located.

[0052] Optionally, in the above technical solution, in S4, calculating the formation dip of the formation where the wellbore is located according to the imaging information image includes:

[0053] The formation dip angle of the formation where the wellbore is located is calculated based on the shape of the imaging information image and the wellbore trajectory inclination angle.

[0054] Optionally, in the above technical solution, the azimuthal logging data while drilling includes: azimuthal density logging data, azimuthal resistivity logging data, azimuthal neutron logging data, azimuthal gamma logging data and azimuthal sonic logging data.

[0055] The present invention can greatly improve the accuracy of the reconstruction of the steering model and play a good supporting role in the geological steering analysis and decision-making of complex oil and gas reservoirs.

[0056] The following is a complete example of a method for reconstructing a geosteering model while drilling according to the present invention.

[0057] S10, obtaining azimuth logging data while drilling in multiple directions:

[0058] The number of azimuth information is at least two, and they are integer exponents of 2, such as 2, 4, 8, 16, etc., and each azimuth is evenly arranged around the wellbore. When there are only two azimuth information, these two azimuths must be located in the upper and lower azimuths; when there are only four azimuth information, they should be the upper, lower, left, and right azimuths; when there are multiple azimuths, they should include the upper, lower, left, and right azimuths. In general, due to the limitation of downhole information transmission speed, only LWD curves of no more than 4 azimuths are uploaded in real time. The following calculation method is only for 2 or 4 azimuths.

[0059] S11. Sector division:

[0060] In the well section where the well inclination is not 0, the high side or north side is the upper direction and the low side is the lower direction. The circumference of the wellbore cross section is divided into n sectors. The angle of each sector is θ, then θ = 360 / n. The upper (or north) direction is numbered 1, and the sectors are arranged in sequence in a clockwise direction. Each sector is numbered i, and the value range of i is 1 to n. Figure 3As shown, since the data of point A is unknown, the data of point B is used to replace the data of point A, then: OB(i)=COS(θ×(i-1)); OB(i) is the length of the projection of the i-th sector onto the line connecting the upper and lower sides (or north and south sides).

[0061] S12, calculate and obtain the azimuth logging data V(i) of each sector while drilling:

[0062] When there are only two azimuth logging data while drilling, the azimuth logging data while drilling for each sector is:

[0063] V(i)=(Vdown×(1-OB(i))+Vup×(1+OB(i))) / 2, where V(i) is the LWD data of the i-th sector, Vdown is the LWD data of the corresponding sector at the bottom (or south), and Vup is the LWD data of the corresponding sector at the top (or north);

[0064] When there are only four logging curves in the four directions of up, down, left and right, the logging values ​​of each sector can be calculated in 8 cases:

[0065] ①When θ×(i-1)=0, V(i)=Vup;

[0066] ②When 0<θ×(i-1)<90°, let V1=Vup, V2=Vright, V(i)=(V1×ABS(OB(i))+V2×(1-ABS(OB(i))), where Vright is the right (or east) azimuth logging data while drilling, and ABS(OB(i)) represents the absolute value of OB(i);

[0067] ③When θ×(i-1)=90°, V(i)=Vright;

[0068] ④When 90°<θ×(i-1)<180°, let V1=Vdown, V2=Vright, V(i)=(V1×ABS(OB(i))+V2×(1-ABS(OB(i))));

[0069] ⑤When θ×(i-1)=180°, V(i)=Vdown;

[0070] ⑥ When 180°<θ×(i-1)<270°, let V1=Vdown, V2=Vleft, V(i)=(V1×ABS(OB(i))+V2×(1-ABS(OB(i))), where Vleft is the azimuth logging data while drilling on the left (or west);

[0071] ⑦θ×(i-1)=270°, V(i)=Vleft;

[0072] ⑧When 270°<θ×(i-1)<360°, let V1=Vup, V2=Vleft, V(i)=(V1×ABS(OB(i))+V2×(1-ABS(OB(i)));

[0073] S13, obtaining imaging information image:

[0074] Select the azimuth logging data that needs synthetic imaging information, open the "Synthetic Imaging Data" module window, and select or fill in the corresponding values ​​according to the interface prompts, including the synthetic data name, synthetic data attribute template and color template, synthetic range, number of channels and channel matching method. After setting the parameters, click the "OK" button, such as Figure 4 shown.

[0075] According to the color template, the logging values ​​calculated in each sector are calculated, the corresponding color values ​​are matched, and the wellbore is expanded along the high side (or north side) to form a rectangle as shown in the figure, such as Figure 5 As shown in the figure, the depth of the well trajectory is taken as the ordinate and the rectangle formed by the development is taken as the abscissa, so as to obtain the imaging information image, as shown in the figure. Figure 6 shown.

[0076] S14. Calculate the formation dip angle of the formation where the wellbore is located:

[0077] The cut-in angle between the borehole trajectory and the formation can be expressed by a trigonometric relationship. By measuring the wavelength of the imaging while drilling sine wave and the sensor detection radius, a trigonometric function calculation relationship is established to calculate the relative angle between the trajectory and the formation. The apparent inclination angle is extracted using the relationship between the relative angle, the trajectory well inclination angle and the horizontal plane. The calculation method is as follows:

[0078] ① Obtain the depths MD_A and MD_B (point B is below point A) of the highest and lowest points of the sine curve, the borehole diameter D, the instrument detection depth DOI, the well inclination angle DEVI and the well inclination azimuth AZIM of the wellbore, as follows: Figure 7 The following parameters are defined at the same time: depth difference DMD from point A to point B, horizontal displacement DX from point A to point B, vertical displacement DY from point A to point B, formation apparent dip angle ADIP, image apparent dip angle ADIP1, image apparent azimuth (relative to the instrument high side or north side) ADIR, formation dip angle DIP, formation true azimuth DIR.

[0079] ② Calculate the depth difference DMD between points A and B:

[0080] DMD = MD_B - MD_A, MD_B represents the depth of B, MD_A represents the depth of A;

[0081] ③Calculate the horizontal displacement DX from point A to point B and the vertical displacement DY from point A to point B:

[0082] i. When the high point of the sine wave curve is in the middle of the image, it is under the stratum, then:

[0083] DX=DMD×SIN(DEVI)+(D×0.0254+0.05)×COS(DEVI);

[0084] DY=DMD×COS(DEVI)-(D×0.0254+0.05)×SIN(DEVI);

[0085] ii. When the high points of the sine wave curve are on both sides of the image, it is penetrating the stratum, then:

[0086] DX=DMD×SIN(DEVI)-(D×0.0254+0.05)×COS(DEVI);

[0087] DY=DMD×COS(DEVI)+(D×0.0254+0.05)×SIN(DEVI);

[0088] ④ Calculate the apparent inclination angle of the formation in the drilling direction:

[0089] The apparent dip angle ADIP is:

[0090] ADIP = arctan (DY / DX) × 180 / 3.1415926, the value range of ADIP is -90° to 90°;

[0091] The image apparent inclination angle ADIP1 (the angle between the track and the formation) is:

[0092] ADIP1=arctan(DMD / (D×0.0254+0.05))×180 / 3.1415926;

[0093] The image visual orientation ADIR is: ADIR=LAB / L×2×180, where LAB is the lateral distance between points A and B in the expanded rectangle, and L is the lateral length of the expanded rectangle. The image visual orientation ADIR is: the relative position of the low point of the sine wave curve on the image relative to the high side orientation of the instrument.

[0094] ⑤ Calculate the formation dip angle DIP as:

[0095] DIP=arctan(-(NN×NN+NE×NE)(1 / 2) / NZ)×180 / 3.1415926

[0096] The true orientation DIR of the formation after well deviation correction is:

[0097] When NE, NN>0, DIR=arctan(NE / NN)×180 / 3.1415926;

[0098] When NE<0, NN>0, DIR=arctan(NE / NN)×180 / 3.1415926+2×180;

[0099] When NN<0, DIR=arctan(NE / NN)×180 / 3.1415926+180;

[0100] Among them, NN, NE, and NZ are calculated intermediate variables, and their calculation formula is:

[0101] NN=sin(ADIP1)×cos(ADIR)×cos(DEVI)×cos(AZIM)-sin(ADIP1)×sin(ADIR)×sin(AZIM)-cos(ADIP1)×sin(DEVI)×cos(AZIM);

[0102] NE=sin(ADIP1)×cos(ADIR)×cos(DEVI)×sin(AZIM)+sin(ADIP1)×sin(ADIR)×cos(AZIM)-cos(ADIP1)×sin(devi)×sin(AZIM);

[0103] NZ=-sin(ADIP1)×cos(ADIR)×sin(DEVI)×cos(ADIP1)×cos(DEVI);

[0104] In the imaging information map, due to the change of the well trajectory and the position of the formation interface, sinusoidal curves with different amplitudes are presented. Through these orthodox curves, the formation dip angles at different positions can be calculated. Figure 8 As shown, the steps are as follows:

[0105] ① Obtain imaging logging information and draw logging information of different orientations on the interface according to the color template;

[0106] ② Select the new dip extraction command and add a line segment at the point on the graph where the dip of the formation needs to be extracted;

[0107] ③ After selecting the line segment, drag the middle and two end points of the line segment to change the amplitude of the displayed sine curve. Drag any point except the two end points and the middle point to translate the curve up and down to make the curve consistent with the imaging pattern.

[0108] ④ Display the extracted formation dip angle in a table to check whether it meets the requirements, such as Fig. 9 shown.

[0109] S15. Reconstruction:

[0110] In the steering model section, the imaging data (obtained by azimuth data simulation imaging or by imaging measurement instruments) is displayed in the upper logging track according to a given color template, and the formation dip extraction scheme established in the formation dip extraction module is superimposed on the imaging data track. In the two-dimensional steering model structure diagram at the bottom of the steering section, a short stick is displayed along the actual drilling trajectory. The dip of the short stick is the apparent dip of the formation at that point. The user can use this dip stick to adjust the formation dip of each section of the formation to achieve the reconstruction of the steering model, such as Fig.10 shown.

[0111] The technical effect of the present invention is described by another embodiment:

[0112] Well CX-1H is a horizontal well drilled in a thin layer. Since the target layer is very thin, it is easy to drill out of the formation. In order to reduce the impact of drilling out of the target layer on the well trajectory, a gamma logging instrument with up and down directions while drilling is used to measure the gamma information around the well trajectory in real time. This method and system are used to process the azimuth gamma information, extract the formation dip, and assist in the reconstruction of the steering model. The steering process is successfully completed and a good drilling rate is obtained. The process is as follows:

[0113] ① The imaging algorithm and the module synthesize the corresponding imaging information through the azimuth logging information simulation, and display it on the imaging track, such as Fig.11 shown.

[0114] ② On the imaging track, a formation dip extraction scheme is established according to the morphology of the imaging information, and the amplitude and position of the sine curve toward each point are adjusted to calculate the formation dip of each point, such as Fig.12 shown.

[0115] ③ The imaging logging information and the sine line extracted from the formation dip are displayed on the logging curve part of the steering profile. The dip stick is used to display the dip angle of each point on the two-dimensional steering profile structure map of the steering profile. The user adjusts the dip angle of each section of the formation structure in combination with other drilling information and geological knowledge to achieve the reconstruction of the steering model, such as Fig.10 shown.

[0116] It can be seen from the result of the guidance model reconstruction that after the orientation gamma information is processed using the method and system of the present invention, the guidance model can be easily reconstructed and has higher accuracy.

[0117] The present invention provides a method and system for processing logging while drilling information with directional information such as azimuth logging while drilling or imaging logging while drilling to guide the reconstruction of a steering model in the geological steering process, thereby solving the problem that conventional fitting methods are difficult to determine from which direction the well trajectory approaches or passes through the formation interface, reducing the multi-solution of the steering model reconstruction, and improving the accuracy of the steering model reconstruction, thereby improving the drilling rate of the reservoir.

[0118] The present invention uses LWD information with directional information, such as azimuthal gamma, azimuthal resistivity and other LWD information, or directly uses LWD imaging information, and extracts the azimuthal information from the LWD information through a certain method, so that it can clearly express the position of the well trajectory in the formation and from which azimuth the well trajectory approaches the boundary of the formation, thereby effectively guiding the adjustment of the well trajectory, which is a problem that needs to be solved urgently.

[0119] The present invention relates to a method and system for guiding the reconstruction of a guidance model using logging while drilling or imaging while drilling information. A method for processing logging while drilling information with directional information such as azimuth logging while drilling or imaging while drilling is provided, and a corresponding analysis system is developed to intuitively display logging while drilling information in different azimuths. The operator draws a logging equivalent change curve based on the displayed logging data in different azimuths, calculates the apparent inclination information of the formation in combination with the well trajectory information such as the well inclination and azimuth of the well trajectory, and indicates from which direction the current well trajectory approaches or passes through the formation, thereby guiding the reconstruction direction of the guidance model.

[0120] The present invention collects azimuth logging while drilling information or imaging logging while drilling information, obtains simulated imaging data through azimuth imaging synthesis simulation algorithm and module calculation, and adopts formation dip extraction method and module to extract formation dip of points with obvious sinusoidal characteristics, and uses dip stick to display them comprehensively in the section of steering model, so as to assist users to adjust the construction line of steering model according to the dip stick, realize the reconstruction of steering model, make good use of the advantage of azimuth information while drilling from which direction the well trajectory approaches or passes through the formation interface, reduce the multi-solution of steering model reconstruction, greatly improve the accuracy of steering model reconstruction, and play a good supporting role in geological steering analysis and decision-making of complex oil and gas reservoirs.

[0121] In the above embodiments, although the steps are numbered S1, S2, etc., these are only specific embodiments given in the present application. Those skilled in the art may adjust the execution order of S1, S2, etc. according to actual conditions, which is also within the scope of protection of the present invention. It can be understood that in some embodiments, some or all of the above embodiments may be included.

[0122] like Fig.13As shown, a system 200 for reconstructing a geosteering model while drilling according to an embodiment of the present invention includes a division module 210, a first calculation module 220, a mapping module 230, a second calculation module 240, a building module 250 and an adjustment module 260;

[0123] The division module 210 is used to: divide any cross section of the wellbore into multiple sectors evenly;

[0124] The first calculation module 220 is used to calculate the azimuth logging while drilling data of each sector on the cross section according to the azimuth logging while drilling data of at least two azimuths on the cross section, until the azimuth logging while drilling data of each sector on each cross section of the wellbore is obtained;

[0125] The mapping module 230 is used to: expand the wellbore along the high side or north side of the wellbore to form a rectangle, use the sounding of the wellbore trajectory as the ordinate, and map the azimuth logging data of each sector on each cross section of the wellbore into the rectangle according to a preset color template to obtain an imaging information image;

[0126] The second calculation module 240 is used to calculate the formation dip angle of the formation where the wellbore is located according to the imaging information image;

[0127] The establishing module 250 is used to: establish a steering profile of a formation within a preset range of the wellbore, wherein the steering profile includes a current formation dip angle of the formation where the wellbore is located;

[0128] The adjustment module 260 is used to adjust the current formation inclination of the formation where the wellbore is located in the steering section to the formation inclination of the formation where the wellbore is located.

[0129] It can greatly improve the accuracy of the reconstruction of the steering model and play a good supporting role in the geological steering analysis and decision-making of complex oil and gas reservoirs.

[0130] Optionally, in the above technical solution, the second calculation module 240 is specifically used for:

[0131] The formation dip angle of the formation where the wellbore is located is calculated based on the shape of the imaging information image and the wellbore trajectory inclination angle.

[0132] Optionally, in the above technical solution, the azimuthal logging data while drilling includes: azimuthal density logging data, azimuthal resistivity logging data, azimuthal neutron logging data, azimuthal gamma logging data and azimuthal sonic logging data.

[0133] The above-mentioned parameters and steps of each unit module implementing corresponding functions in the system 200 for reconstructing a geosteering model while drilling of the present invention can refer to the parameters and steps in the embodiment of the method for reconstructing a geosteering model while drilling, and will not be repeated here.

[0134] A storage medium according to an embodiment of the present invention stores instructions, and when a computer reads the instructions, the computer performs any one of the above-mentioned methods for reconstructing a geosteering model while drilling.

[0135] An electronic device according to an embodiment of the present invention includes a processor and the above-mentioned storage medium, wherein the processor executes instructions in the storage medium, wherein the electronic device can be a computer, a mobile phone, etc.

[0136] Those skilled in the art will appreciate that the present invention may be implemented as a system, method or computer program product.

[0137] Therefore, the present disclosure may be specifically implemented in the following forms, namely: it may be completely hardware, it may be completely software (including firmware, resident software, microcode, etc.), or it may be a combination of hardware and software, generally referred to herein as a "circuit", "module" or "system". In addition, in some embodiments, the present invention may also be implemented in the form of a computer program product in one or more computer-readable media, and the computer-readable medium contains computer-readable program code.

[0138] Any combination of one or more computer-readable media can be used. Computer-readable media can be computer-readable signal media or computer-readable storage media. Computer-readable storage media can be, for example, but not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or devices, or any combination of the above. More specific examples (non-exhaustive list) of computer-readable storage media include: electrical connections with one or more wires, portable computer disks, hard disks, random access memories (RAM), read-only memories (ROM), erasable programmable read-only memories (EPROM or flash memory), optical fibers, portable compact disk read-only memories (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the above. In this document, computer-readable storage media can be any tangible medium containing or storing a program, which can be used by an instruction execution system, device or device or used in combination with it.

[0139] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A method for reconstructing a geosteering model while drilling, characterized in that: include: Divide any cross section of the wellbore into multiple sectors evenly; Calculating the azimuth logging while drilling data of each sector on the cross section according to the azimuth logging while drilling data of at least two azimuths on the cross section until the azimuth logging while drilling data of each sector on each cross section of the wellbore is obtained; Expand the wellbore along the high side or the north side of the wellbore to form a rectangle, use the measured depth of the wellbore trajectory as the ordinate, and map the azimuth logging data of each sector on each cross section of the wellbore into the rectangle according to a preset color template to obtain an imaging information image; Calculating the formation dip angle of the formation where the wellbore is located according to the imaging information image; Establishing a steering profile of a formation within a preset range of the wellbore, wherein the steering profile includes a current formation dip angle of the formation where the wellbore is located; Adjusting the current formation dip of the formation where the wellbore is located in the steering section to the calculated formation dip of the formation where the wellbore is located; Calculating the formation dip of the formation where the wellbore is located according to the imaging information image includes: The formation dip angle of the formation where the wellbore is located is calculated according to the shape of the imaging information image and the wellbore trajectory.

2. The method for reconstructing a geosteering model while drilling according to claim 1, characterized in that: The azimuthal logging data while drilling includes: azimuthal density logging data, azimuthal resistivity logging data, azimuthal neutron logging data, azimuthal gamma logging data and azimuthal sonic logging data.

3. A system for reconstructing a geosteering model while drilling, characterized in that: It includes a division module, a first calculation module, a mapping module, a second calculation module, a building module and an adjustment module; The division module is used to: divide any cross section of the wellbore into multiple sectors evenly; The first calculation module is used to calculate the azimuth logging while drilling data of each sector on the cross section according to the azimuth logging while drilling data of at least two azimuths on the cross section, until the azimuth logging while drilling data of each sector on each cross section of the wellbore is obtained; The mapping module is used to: expand the wellbore along the high side or the north side of the wellbore to form a rectangle, use the measured depth of the wellbore trajectory as the ordinate, and map the azimuth logging while drilling data of each sector on each cross section of the wellbore into the rectangle according to a preset color template to obtain an imaging information image; The second calculation module is used to calculate the formation dip angle of the formation where the wellbore is located according to the imaging information image; The establishment module is used to: establish a steering profile of a formation within a preset range of the wellbore, wherein the steering profile includes a current formation dip angle of the formation where the wellbore is located; The adjustment module is used to: adjust the current formation dip of the formation where the wellbore is located in the steering section to the calculated formation dip of the formation where the wellbore is located; The second calculation module is specifically used for: The formation dip angle of the formation where the wellbore is located is calculated according to the shape of the imaging information image and the wellbore trajectory.

4. A system for reconstructing geosteering models while drilling according to claim 3, characterized in that: The azimuthal logging data while drilling includes: azimuthal density logging data, azimuthal resistivity logging data, azimuthal neutron logging data, azimuthal gamma logging data and azimuthal sonic logging data.

5. A storage medium, characterized in that: The storage medium stores instructions, and when a computer reads the instructions, the computer executes a method for reconstructing a while-drilling geosteering model as described in any one of claims 1 to 2.

6. An electronic device, characterized in that: The invention comprises a processor and the storage medium as claimed in claim 5, wherein the processor executes instructions in the storage medium.

Images