Method and device for determining the thickness of plumb bob encountered in drilling reservoir

Abstract

The present invention provides a method and device for determining the plumb thickness of a reservoir encountered during drilling. The method comprises: determining a seismic dip attribute body according to seismic data; determining the accurate spatial distribution position of the reservoir encountered during drilling according to the acoustic wave curve of the logging data; determining a pseudo-well dip curve according to the accurate spatial distribution position of the reservoir encountered during drilling and the seismic dip attribute body; and determining the plumb thickness of the reservoir encountered during drilling according to the drilling information and the pseudo-well dip curve. The present invention utilizes the existing seismic data, the acoustic wave curve of the logging data and the drilling information to obtain the plumb thickness of the reservoir encountered during drilling through rigorous logical calculations. Moreover, the implementation of the present invention does not have multiple solutions and has low artificial uncontrollable factors, so the plumb thickness of the reservoir encountered during drilling can be accurately calculated.

Description

Technical Field

[0001] The invention relates to the technical field of seismic and well logging, and in particular to a method and device for determining the plumb bob thickness of a reservoir encountered during drilling. Background Art

[0002] At present, with the continuous development of oil and gas exploration and development, it is very important to obtain the vertical thickness of the reservoir encountered by drilling in actual production. As an important geological parameter, the vertical thickness of the reservoir is the basis for correctly interpreting and evaluating the reservoir characteristics and sedimentary characteristics of underground formations, and it is also a key indicator for reserve declaration, well site deployment, and exploration evaluation.

[0003] If the well is known to be a vertical well or a low-angle well, the vertical thickness of the reservoir can be obtained by directly subtracting the depth of the top and bottom interfaces of the well reservoir. If the well is known to be a high-angle well or even a horizontal well, the change in the vertical thickness of the reservoir will be more complicated due to the continuous change of the well inclination and the formation inclination.

[0004] In actual production, it is very difficult to accurately determine the vertical thickness of the reservoir. The main reason is that the dip angle of the formation is generally difficult to determine. At present, the main technical means are roughly divided into the following three categories:

[0005] The first category: obtaining formation dip angle while drilling before drilling. During the drilling process, through real-time geological guidance, the formation dip angle can be predicted through the leading geological model, and during the drilling process, it can be automatically picked up through density imaging while drilling, and some commercial software can be used to automatically pick it up. At present, this technology is relatively mature, and the effect of commercial software application is also good. However, the cost of obtaining formation dip angle is high.

[0006] The second category: calculating the formation dip. At present, the means of obtaining the formation dip are simple estimates, mainly in the following two ways: 1. On the seismic profile of the through-well depth, the formation dip is calculated according to the occurrence of the formation; 2. On the plane map, the projection coordinates are obtained according to the depth value of the top and bottom interfaces, and the formation dip is calculated inversely.

[0007] These two calculation methods are relatively common methods in production because there is currently no more accurate means of obtaining the dip of the formation: depth seismic profiles or plan views are based on time-to-depth conversion, that is, the quality of the time-to-depth conversion directly affects the accuracy of the vertical thickness calculation; on the through-well depth profile, the number of CDPs in the horizontal direction needs to be read manually, and when converted into length, the reading error is uncontrollable; the depth of the top and bottom interfaces is obtained by manual reading to obtain the projection coordinates, and the reading error is also an uncontrollable factor.

[0008] The third category: other alternative methods. There are mainly two methods: 1. Estimate the inclination value by interpolation from known adjacent wells; 2. Substitute the empirical value of a small area in the study area.

[0009] Some literatures mention the calculation method of true formation thickness, but the vertical thickness and even the formation dip angle are taken as known conditions, which simplifies the real model. From the existing research results, there is no technical solution for calculating the vertical thickness of reservoirs. Summary of the invention

[0010] The embodiment of the present invention provides a method for determining the plumb bob thickness of a reservoir encountered during drilling, which can accurately obtain the plumb bob thickness of a reservoir encountered during drilling. The method includes:

[0011] Determine the seismic dip attribute volume based on seismic data;

[0012] Determine the exact spatial distribution of the reservoir encountered by drilling based on the acoustic wave curve of the logging data;

[0013] Determine the pseudo-well dip curve based on the accurate spatial distribution position of the reservoir encountered and the seismic dip attribute body;

[0014] According to the drilling information and pseudo-well inclination curve, the plumb thickness of the reservoir encountered by the drilling is determined.

[0015] The embodiment of the present invention further provides a device for determining the plumb thickness of a reservoir encountered during drilling, comprising:

[0016] A seismic dip attribute body determination module is used to determine the seismic dip attribute body according to seismic data;

[0017] A module for determining the accurate spatial distribution position of the reservoir encountered during drilling is used to determine the accurate spatial distribution position of the reservoir encountered during drilling according to the acoustic wave curve of the well logging data;

[0018] A pseudo-well dip curve determination module is used to determine the pseudo-well dip curve according to the accurate spatial distribution position of the reservoir encountered and the seismic dip attribute body;

[0019] The plumb bob thickness determination module for the reservoir encountered during drilling is used to determine the plumb bob thickness of the reservoir encountered during drilling according to the drilling information and the pseudo-well inclination curve.

[0020] An embodiment of the present invention also provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the aforementioned method for determining the plumb bob thickness of a reservoir encountered during drilling when executing the computer program.

[0021] An embodiment of the present invention further provides a computer-readable storage medium storing a computer program for executing the aforementioned method for determining the plumb bob thickness of a reservoir encountered during drilling.

[0022] The embodiment of the present invention provides a method and device for determining the plumb bob thickness of a reservoir encountered during drilling. The method and device obtain seismic dip attribute bodies based on seismic data, obtain the accurate spatial distribution position of the reservoir encountered during drilling according to the acoustic wave curve of the logging data, and then extract the pseudo-well dip curve in combination with the seismic dip attribute bodies obtained above. Finally, the plumb bob thickness of the reservoir encountered during drilling is determined according to the drilling information and the pseudo-well dip curve. The method and device for determining the plumb bob thickness of a reservoir encountered during drilling according to the embodiment of the present invention utilize the existing seismic data, acoustic wave curve of the logging data and the drilling information to obtain the plumb bob thickness of the reservoir encountered during drilling through rigorous logical calculation. Moreover, the embodiment of the present invention does not have multiple solutions and has low artificial uncontrollable factors, so the plumb bob thickness of the reservoir encountered during drilling can be accurately calculated. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0024] Figure 1 The present invention is a schematic diagram of a method for determining the plumb bob thickness of a reservoir encountered during drilling according to an embodiment of the present invention.

[0025] Figure 2 The present invention is a schematic diagram of X-hole seismic calibration in an example of a method for determining the plumb bob thickness of a reservoir encountered during drilling in an embodiment of the present invention.

[0026] Figure 3 The data format of the formation dip angle of the well X is extracted in an example of a method for determining the plumb bob thickness of a reservoir encountered by a well in an embodiment of the present invention.

[0027] Figure 4 A schematic diagram of drilling direction of a method for determining plumb bob thickness of a reservoir encountered during drilling according to an embodiment of the present invention.

[0028] Figure 5 This is a calculation table for the plumb bob thickness of a reservoir encountered during drilling in part of an example of a method for determining the plumb bob thickness of a reservoir encountered during drilling in an embodiment of the present invention.

[0029] Figure 6 A schematic diagram of a computer device for running a method for determining the plumb thickness of a reservoir encountered during drilling implemented by the present invention.

[0030] Figure 7 The present invention is a schematic diagram of a device for determining the plumb bob thickness of a reservoir encountered during drilling according to an embodiment of the present invention. DETAILED DESCRIPTION

[0031] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0032] like Figure 1 As shown in a schematic diagram of a method for determining the plumb bob thickness of a reservoir encountered during drilling according to an embodiment of the present invention, an embodiment of the present invention provides a method for determining the plumb bob thickness of a reservoir encountered during drilling, which can accurately obtain the plumb bob thickness of a reservoir encountered during drilling. The method includes:

[0033] Step 101: Determine the earthquake dip attribute volume according to the earthquake data;

[0034] Step 102: Determine the exact spatial distribution position of the reservoir encountered by drilling according to the acoustic wave curve of the logging data;

[0035] Step 103: determining a pseudo-well dip curve according to the accurate spatial distribution position of the reservoir encountered and the seismic dip attribute body;

[0036] Step 104: Determine the plumb bob thickness of the reservoir encountered by the drilling according to the drilling information and the pseudo-well inclination curve.

[0037] A method for determining the plumb bob thickness of a reservoir encountered during drilling provided by an embodiment of the present invention is based on seismic data to obtain a seismic dip attribute body, and according to the acoustic wave curve of the logging data, the accurate spatial distribution position of the reservoir encountered during drilling is obtained, and then the pseudo-well dip curve is extracted in combination with the seismic dip attribute body obtained above, and finally the plumb bob thickness of the reservoir encountered during drilling is determined according to the drilling information and the pseudo-well dip curve. The method for determining the plumb bob thickness of a reservoir encountered during drilling provided by an embodiment of the present invention utilizes the existing seismic data, acoustic wave curve of the logging data and the drilling information, and can obtain the plumb bob thickness of the reservoir encountered during drilling through rigorous logical calculations, and the embodiment of the present invention does not have multiple solutions and has low artificial uncontrollable factors, so the plumb bob thickness of the reservoir encountered during drilling can be accurately calculated.

[0038] In a specific implementation of an embodiment of the present invention, a method for determining the plumb bob thickness of a reservoir encountered during drilling may include:

[0039] Determine the seismic dip attribute based on seismic data; determine the accurate spatial distribution of the reservoir encountered based on the acoustic wave curve of the logging data; determine the pseudo-well dip curve based on the accurate spatial distribution of the reservoir encountered and the seismic dip attribute; determine the plumb bob thickness of the reservoir encountered by drilling based on the drilling information and the pseudo-well dip curve.

[0040] When implementing a method for determining the plumb bob thickness of a reservoir encountered by a well drilling according to an embodiment of the present invention, in one embodiment, determining a seismic dip attribute body according to seismic data includes:

[0041] Based on seismic data, the changing characteristics of seismic dip are extracted to obtain the seismic dip attribute body.

[0042] In the embodiment, based on the seismic data, the variation characteristics of the seismic dip angle of the strata in the region are extracted to obtain the dip angle body of the seismic data. The seismic dip angle body can be obtained using seismic commercial software. Since the dip angle body needs to be as accurate as possible in actual production, the time window can be set smaller, and the number of search points in the vertical and horizontal directions can be set smaller, for example, 3 sampling points can be set in the vertical and horizontal directions.

[0043] When implementing a method for determining the plumb bob thickness of a reservoir encountered during drilling according to an embodiment of the present invention, in one embodiment, determining the accurate spatial distribution position of the reservoir encountered during drilling according to the acoustic wave curve of the well logging data includes:

[0044] Make synthetic seismic records based on the acoustic wave curves of well logging data;

[0045] By utilizing the wave group characteristics of the synthetic seismic records and referring to the calibration of vertical wells in the adjacent areas, fine calibration of seismic logging is performed to determine the exact spatial distribution position of the reservoir encountered.

[0046] When implementing a method for determining the plumb bob thickness of a reservoir encountered during drilling according to an embodiment of the present invention, in one embodiment, the calibration of the vertical wells in the adjacent area includes:

[0047] The top of the vertical well reservoir in the adjacent area is located at the zero point of the strong isotropic axis of the seismic profile, and the bottom of the vertical well reservoir in the adjacent area is located at the trough beneath the strong isotropic axis of the seismic profile.

[0048] In the embodiment, Figure 2 FIG. 1 is a schematic diagram of X-hole seismic calibration of a well in an example of a method for determining the plumb thickness of a reservoir encountered during drilling according to an embodiment of the present invention, as shown in FIG. Figure 2 As shown in the figure, the seismic logging is finely calibrated according to the logging acoustic wave curve to obtain the accurate spatial distribution position of the reservoir encountered on the seismic section. Figure 2 It can be seen that there are certain differences in the calibration of the wave group characteristics of the synthetic record and the well bypass in the reservoir section. This is because the horizontal well is extended laterally during the drilling process, and the synthetic record (wavelet) will be compressed vertically, resulting in inconsistency between the synthetic record and the seismic profile wave group characteristics. Therefore, when calibrating horizontal wells, we cannot only rely on the wave group relationship, but also need to refer to the calibration of vertical wells in the adjacent area. The top of the reservoir is located at the zero point of the strong isotropic axis of the seismic profile, and the bottom of the reservoir is located at the trough beneath the strong isotropic axis of the seismic profile. In specific implementation, there will be certain differences in the top and bottom of the reservoir in different blocks. The above Figure 2 This is just an example description.

[0049] The difference in the relationship between seismic wave groups will affect the seismic inversion, but will not affect the spatial distribution position. In step 102, the purpose is to use the wave group characteristics and refer to the calibration of adjacent wells to obtain the accurate spatial distribution position of the drilling.

[0050] When implementing a method for determining the plumb bob thickness of a reservoir encountered during drilling according to an embodiment of the present invention, in one embodiment, a pseudo-well dip curve is determined according to the accurate spatial distribution position of the reservoir encountered during drilling and a seismic dip attribute body, including:

[0051] According to the accurate spatial distribution position of the reservoir encountered during drilling, the formation dip information is extracted from the seismic dip attribute body according to the well trajectory to determine the pseudo-well dip curve.

[0052] When implementing a method for determining the plumb thickness of a reservoir encountered during drilling according to an embodiment of the present invention, in one embodiment, the well trajectory includes: the drilling depth and set sampling points;

[0053] Extract formation dip information from seismic dip attributes according to well trajectory, including:

[0054] According to the drilling depth and the set sampling points, the formation dip information is extracted from the seismic dip attribute body.

[0055] In the embodiment, according to the accurate spatial distribution position of the reservoir encountered by the well trajectory of the highly deviated well or the horizontal well, the change of the formation dip angle beside the well is extracted strictly according to the well trajectory, that is, the extraction of the pseudo well dip angle curve. Since the pseudo well dip angle curve is not a real well logging curve, it is a curve with formation dip angle information extracted according to the drilling depth and a given sampling rate. Figure 3 The present invention provides a method for determining the plumb bob thickness of a reservoir encountered during drilling in an embodiment of the present invention, in which a formation dip angle data format of X drilling is extracted.

[0056] When implementing a method for determining the plumb bob thickness of a reservoir encountered during drilling according to an embodiment of the present invention, in one embodiment, the drilling information includes: well inclination, reservoir oblique thickness, and drilling direction;

[0057] According to the drilling information and pseudo-well inclination curve, the plumb thickness of the reservoir encountered by the drilling is determined, including:

[0058] The formation dip is extracted from the pseudo-well dip curve, and the plumb thickness of the reservoir encountered during drilling is determined according to the drilling direction, the formation dip, the well dip and the oblique thickness of the reservoir.

[0059] Figure 4 Schematic diagram of drilling direction of a method for determining the plumb bob thickness of a reservoir encountered during drilling according to an embodiment of the present invention. Figure 4As shown in (a), when a method for determining the plumb bob thickness of a reservoir encountered during drilling is specifically implemented according to an embodiment of the present invention, in one embodiment, when the drilling direction is the up-dip direction of the formation, the plumb bob thickness of the reservoir encountered during drilling is determined in the following manner:

[0060] AB=AD·COS(α-θ) / COSθ

[0061] Among them, AB is the plumb bob thickness of the reservoir encountered during drilling; AD is the oblique thickness of the reservoir; α is the well inclination; θ is the formation inclination.

[0062] The above-mentioned expression for determining the plumb bob thickness of the reservoir encountered during drilling is for illustration only. Those skilled in the art will appreciate that, during implementation, the above formula may be deformed in a certain form and other parameters or data may be added as needed, or other specific formulas may be provided. All of these variations should fall within the scope of protection of the present invention.

[0063] Figure 5 This is a calculation table of the plumb bob thickness of a reservoir encountered during drilling in an example of a method for determining the plumb bob thickness of a reservoir encountered during drilling in an embodiment of the present invention. Figure 5 As shown in the figure, after calculating the plumb bob thickness of the reservoir encountered by each drilling depth, the plumb bob thickness of the reservoir encountered by all drilling depths is accumulated (i.e. Figure 5 The last column in the table above) is used to obtain the plumb bob thickness of the reservoir encountered in the drilling depth interval.

[0064] Figure 4 Schematic diagram of drilling direction of a method for determining the plumb bob thickness of a reservoir encountered during drilling according to an embodiment of the present invention. Figure 4 As shown in (b), when a method for determining the plumb bob thickness of a reservoir encountered during drilling is specifically implemented according to an embodiment of the present invention, in one embodiment, when the drilling direction is the down-dip direction of the formation, the plumb bob thickness of the reservoir encountered during drilling is determined in the following manner:

[0065] AB=AD·COS(α+θ) / COSθ

[0066] Among them, AB is the plumb bob thickness of the reservoir encountered during drilling; AD is the oblique thickness of the reservoir; α is the well inclination; θ is the formation inclination.

[0067] The above-mentioned expression for determining the plumb bob thickness of the reservoir encountered during drilling is for illustration only. Those skilled in the art will appreciate that, during implementation, the above formula may be deformed in a certain form and other parameters or data may be added as needed, or other specific formulas may be provided. All of these variations should fall within the scope of protection of the present invention.

[0068] When implementing a method for determining the plumb bob thickness of a reservoir encountered during drilling according to an embodiment of the present invention, in one embodiment, extracting the formation dip from a pseudo-well dip curve includes:

[0069] The formation dip is extracted from the pseudo-well dip curve, the sampling interval between the well dip and the formation dip is adjusted, the well dip is matched with the formation dip, the sampling interval between the well dip and the formation dip is made the same, and unified sampling is achieved.

[0070] Figure 6 A schematic diagram of a computer device for running a method for determining the plumb thickness of a reservoir encountered during drilling in accordance with the present invention is shown in FIG. Figure 6 As shown, an embodiment of the present invention also provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the above-mentioned method for determining the plumb bob thickness of a reservoir encountered during drilling when executing the computer program.

[0071] An embodiment of the present invention further provides a computer-readable storage medium storing a computer program for executing the above-mentioned method for determining the plumb bob thickness of a reservoir encountered during drilling.

[0072] The present invention also provides a device for determining the plumb thickness of a reservoir encountered by drilling, as described in the following embodiments. Since the principle of the device to solve the problem is similar to that of a method for determining the plumb thickness of a reservoir encountered by drilling, the implementation of the device can refer to the implementation of a method for determining the plumb thickness of a reservoir encountered by drilling, and the repeated parts will not be repeated.

[0073] like Figure 7 As shown, an embodiment of the present invention further provides a device for determining the plumb bob thickness of a reservoir encountered during drilling, comprising:

[0074] The seismic dip attribute body determination module 701 is used to determine the seismic dip attribute body according to the seismic data;

[0075] The module 702 for determining the exact spatial distribution position of the reservoir encountered during drilling is used to determine the exact spatial distribution position of the reservoir encountered during drilling according to the acoustic wave curve of the well logging data;

[0076] The pseudo-well dip curve determination module 703 is used to determine the pseudo-well dip curve according to the accurate spatial distribution position of the reservoir encountered by drilling and the seismic dip attribute body;

[0077] The plumb bob thickness determination module 704 for the reservoir encountered during drilling is used to determine the plumb bob thickness for the reservoir encountered during drilling according to the drilling information and the pseudo-well inclination curve.

[0078] When implementing a device for determining the plumb thickness of a reservoir encountered during drilling according to an embodiment of the present invention, in one embodiment, a module for determining a seismic dip attribute body is specifically used to:

[0079] Based on seismic data, the changing characteristics of seismic dip are extracted to obtain the seismic dip attribute body.

[0080] When implementing a device for determining the plumb bob thickness of a reservoir encountered during drilling according to an embodiment of the present invention, in one embodiment, a module for determining the accurate spatial distribution position of the reservoir encountered during drilling is specifically used to:

[0081] Make synthetic seismic records based on the acoustic wave curves of well logging data;

[0082] By utilizing the wave group characteristics of the synthetic seismic records and referring to the calibration of vertical wells in the adjacent areas, fine calibration of seismic logging is performed to determine the exact spatial distribution position of the reservoir encountered.

[0083] When implementing a device for determining the plumb bob thickness of a reservoir encountered during drilling according to an embodiment of the present invention, in one embodiment, the calibration of the vertical wells in the adjacent area includes:

[0084] The top of the vertical well reservoir in the adjacent area is located at the zero point of the strong isotropic axis of the seismic profile, and the bottom of the vertical well reservoir in the adjacent area is located at the trough beneath the strong isotropic axis of the seismic profile.

[0085] When implementing a device for determining the plumb thickness of a reservoir encountered during drilling according to an embodiment of the present invention, in one embodiment, a pseudo-well inclination curve determination module is specifically used to:

[0086] According to the accurate spatial distribution position of the reservoir encountered during drilling, the formation dip information is extracted from the seismic dip attribute body according to the well trajectory to determine the pseudo-well dip curve.

[0087] When implementing a device for determining the plumb thickness of a reservoir encountered during drilling according to an embodiment of the present invention, in one embodiment, the well trajectory includes: the drilling depth and the set sampling points;

[0088] Extract formation dip information from seismic dip attributes according to well trajectory, including:

[0089] According to the drilling depth and the set sampling points, the formation dip information is extracted from the seismic dip attribute body.

[0090] When implementing a device for determining the plumb thickness of a reservoir encountered during drilling according to an embodiment of the present invention, in one embodiment, the drilling information includes: well inclination, reservoir oblique thickness, and drilling direction;

[0091] The pseudo well inclination curve determination module is also used for:

[0092] The formation dip is extracted from the pseudo-well dip curve, and the plumb thickness of the reservoir encountered during drilling is determined according to the drilling direction, the formation dip, the well dip and the oblique thickness of the reservoir.

[0093] When implementing a device for determining the plumb bob thickness of a reservoir encountered by drilling according to an embodiment of the present invention, in one embodiment, the pseudo-well inclination curve determination module is further used to determine the plumb bob thickness of the reservoir encountered by drilling according to the following method when the drilling direction is the up-dip direction of the formation:

[0094] AB=AD·COS(α-θ) / COSθ

[0095] Among them, AB is the plumb bob thickness of the reservoir encountered during drilling; AD is the oblique thickness of the reservoir; α is the well inclination; θ is the formation inclination.

[0096] The above-mentioned expression for determining the plumb bob thickness of the reservoir encountered during drilling is for illustration only. Those skilled in the art will appreciate that, during implementation, the above formula may be deformed in a certain form and other parameters or data may be added as needed, or other specific formulas may be provided. All of these variations should fall within the scope of protection of the present invention.

[0097] When implementing a device for determining the plumb thickness of a reservoir encountered by drilling according to an embodiment of the present invention, in one embodiment, the pseudo-well inclination curve determination module is further used to determine the plumb thickness of the reservoir encountered by drilling according to the following method when the drilling direction is the downdip direction of the formation:

[0098] AB=AD·COS(α+θ) / COSθ

[0099] Among them, AB is the plumb bob thickness of the reservoir encountered during drilling; AD is the oblique thickness of the reservoir; α is the well inclination; θ is the formation inclination.

[0100] The above-mentioned expression for determining the plumb bob thickness of the reservoir encountered during drilling is for illustration only. Those skilled in the art will appreciate that, during implementation, the above formula may be deformed in a certain form and other parameters or data may be added as needed, or other specific formulas may be provided. All of these variations should fall within the scope of protection of the present invention.

[0101] When implementing a device for determining the plumb thickness of a reservoir encountered during drilling according to an embodiment of the present invention, in one embodiment, the pseudo-well inclination curve determination module is further used to:

[0102] The formation dip is extracted from the pseudo-well dip curve, and the sampling interval between the well dip and the formation dip is adjusted to make the sampling interval between the well dip and the formation dip the same.

[0103] In summary, the embodiment of the present invention provides a method and device for determining the plumb bob thickness of a reservoir encountered by drilling. Based on seismic data, a seismic dip attribute body is obtained. According to the acoustic wave curve of the logging data, the accurate spatial distribution position of the reservoir encountered by drilling is obtained. Then, in combination with the seismic dip attribute body obtained above, a pseudo-well dip curve is extracted. Finally, according to the drilling information and the pseudo-well dip curve, the plumb bob thickness of the reservoir encountered by drilling is determined. The method and device for determining the plumb bob thickness of a reservoir encountered by drilling in the embodiment of the present invention utilize the existing seismic data, acoustic wave curve of the logging data and the drilling information. Through rigorous logical calculation, the plumb bob thickness of the reservoir encountered by drilling can be obtained. Moreover, the embodiment of the present invention does not have multiple solutions and has low artificial uncontrollable factors. Therefore, the plumb bob thickness of the reservoir encountered by drilling can be accurately calculated.

[0104] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0105] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0106] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0107] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0108] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for determining the plumb bob thickness of a reservoir encountered during drilling, characterized in that: include: Determine the seismic dip attribute volume based on seismic data; According to the acoustic wave curve of the logging data, the accurate spatial distribution position of the drilled reservoir is determined, which includes: making a seismic synthetic record according to the acoustic wave curve of the logging data; using the wave group characteristics of the seismic synthetic record and referring to the calibration of the vertical wells in the adjacent area, performing fine calibration of the seismic logging to determine the accurate spatial distribution position of the drilled reservoir; the calibration of the vertical wells in the adjacent area includes: the top of the vertical well reservoir in the adjacent area is located at the zero point of the strong isotropic axis of the seismic profile, and the bottom of the vertical well reservoir in the adjacent area is located at the trough underlying the strong isotropic axis of the seismic profile; Determine the pseudo-well dip curve based on the accurate spatial distribution position of the reservoir encountered and the seismic dip attribute body; Determine the plumb thickness of the reservoir encountered by drilling according to drilling information and pseudo-well inclination curve; According to the accurate spatial distribution position of the reservoir encountered during drilling and the seismic dip attribute body, a pseudo well dip curve is determined, including: according to the accurate spatial distribution position of the reservoir encountered during drilling, formation dip information is extracted from the seismic dip attribute body according to the well trajectory to determine the pseudo well dip curve; the well trajectory includes: drilling depth and set sampling points; extracting formation dip information from the seismic dip attribute body according to the well trajectory includes: extracting formation dip information from the seismic dip attribute body according to the drilling depth and the set sampling points.

2. The method according to claim 1, characterized in that According to the seismic data, the seismic dip attribute body is determined, including: Based on seismic data, the changing characteristics of seismic dip are extracted to obtain the seismic dip attribute body.

3. The method according to claim 1, characterized in that The drilling information includes: well inclination, reservoir thickness, and drilling direction; According to the drilling information and pseudo-well inclination curve, the plumb thickness of the reservoir encountered by the drilling is determined, including: The formation dip is extracted from the pseudo-well dip curve, and the plumb thickness of the reservoir encountered during drilling is determined according to the drilling direction, the formation dip, the well dip and the oblique thickness of the reservoir.

4. The method according to claim 3, characterized in that When the drilling direction is the up-dip direction of the formation, the plumb thickness of the reservoir encountered by drilling is determined as follows: AB=AD·COS(α-θ) / COSθ Among them, AB is the plumb bob thickness of the reservoir encountered during drilling; AD is the oblique thickness of the reservoir; α is the well inclination; θ is the formation inclination.

5. The method according to claim 3, characterized in that When the drilling direction is the down-dip direction of the formation, the plumb thickness of the reservoir encountered by the drilling is determined as follows: AB=AD·COS(α+θ) / COSθ Among them, AB is the plumb bob thickness of the reservoir encountered during drilling; AD is the oblique thickness of the reservoir; α is the well inclination; θ is the formation inclination.

6. The method according to claim 3, characterized in that Extract formation dip from pseudo-well dip curve, including: The formation dip is extracted from the pseudo-well dip curve, and the sampling interval between the well dip and the formation dip is adjusted to make the sampling interval between the well dip and the formation dip the same.

7. A device for determining the plumb bob thickness of a reservoir encountered during drilling, characterized in that: include: A seismic dip attribute body determination module is used to determine the seismic dip attribute body according to seismic data; The module for determining the accurate spatial distribution position of the drilled reservoir is used to determine the accurate spatial distribution position of the drilled reservoir according to the acoustic wave curve of the logging data, which includes: making a seismic synthetic record according to the acoustic wave curve of the logging data; using the wave group characteristics of the seismic synthetic record and referring to the calibration of the vertical wells in the adjacent area, performing fine calibration of the seismic logging to determine the accurate spatial distribution position of the drilled reservoir; the calibration of the vertical wells in the adjacent area includes: the top of the vertical well reservoir in the adjacent area is located at the zero point of the strong isotropic axis of the seismic profile, and the bottom of the vertical well reservoir in the adjacent area is located at the trough underlying the strong isotropic axis of the seismic profile; A pseudo-well dip curve determination module is used to determine the pseudo-well dip curve according to the accurate spatial distribution position of the reservoir encountered and the seismic dip attribute body; A module for determining the plumb thickness of the reservoir encountered by drilling, which is used to determine the plumb thickness of the reservoir encountered by drilling according to the drilling information and the pseudo-well inclination curve; The pseudo-well dip curve determination module is specifically used to: extract formation dip information from the seismic dip attribute body according to the accurate spatial distribution position of the drilled reservoir according to the well trajectory, and determine the pseudo-well dip curve; the well trajectory includes: drilling depth and set sampling points; extracting formation dip information from the seismic dip attribute body according to the well trajectory includes: extracting formation dip information from the seismic dip attribute body according to the drilling depth and the set sampling points.

8. The device according to claim 7, characterized in that The earthquake dip attribute body determination module is specifically used for: Based on seismic data, the changing characteristics of seismic dip are extracted to obtain the seismic dip attribute body.

9. The device according to claim 7, characterized in that The drilling information includes: well inclination, reservoir thickness, and drilling direction; The pseudo well inclination curve determination module is also used for: The formation dip is extracted from the pseudo-well dip curve, and the plumb thickness of the reservoir encountered during drilling is determined according to the drilling direction, the formation dip, the well dip and the oblique thickness of the reservoir.

10. The device according to claim 9, characterized in that The pseudo well inclination curve determination module is also used to determine the plumb thickness of the reservoir encountered by drilling in the following manner when the drilling direction is the up-dip direction of the formation: AB=AD·COS(α-θ) / COSθ Among them, AB is the plumb bob thickness of the reservoir encountered during drilling; AD is the oblique thickness of the reservoir; α is the well inclination; θ is the formation inclination.

11. The device according to claim 9, characterized in that The pseudo well inclination curve determination module is also used to determine the plumb thickness of the reservoir encountered by drilling in the following manner when the drilling direction is the down-dip direction of the formation: AB=AD·COS(α+θ) / COSθ Among them, AB is the plumb bob thickness of the reservoir encountered during drilling; AD is the oblique thickness of the reservoir; α is the well inclination; θ is the formation inclination.

12. The device according to claim 9, characterized in that The pseudo well inclination curve determination module is also used for: The formation dip is extracted from the pseudo-well dip curve, and the sampling interval between the well dip and the formation dip is adjusted to make the sampling interval between the well dip and the formation dip the same.

13. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the method for determining the plumb bob thickness of a reservoir encountered during drilling as claimed in any one of claims 1 to 6 when executing the computer program.

14. A computer-readable storage medium storing a computer program for executing the method for determining the plumb bob thickness of a reservoir encountered during drilling according to any one of claims 1 to 6.

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