Rock core homing method and device based on rock hardness, electronic equipment and medium

Abstract

The embodiment of the invention discloses a rock core homing method and device based on rock hardness, electronic equipment and a storage medium. The method comprises the following steps: determining the top and bottom boundaries of a to-be-homed rock core and a preset rock core hardness measurement distance, and determining a rock core hardness measurement point according to the top and bottom boundaries of the to-be-homed rock core and the preset rock core hardness measurement distance; performing hardness measurement at the rock core hardness measurement point by using hardness measurement equipment, and establishing a rock core hardness curve according to the rock core hardness average value; and determining a depth error of a target feature point according to the rock core hardness curve and a pre-acquired well logging curve, and homing the to-be-homed rock core according to the depth error of the target feature point. By adopting the technical scheme of the embodiment of the invention, through the rock core comparison homing method based on the rock hardness, rapid and accurate homing of the rock core is realized, the working efficiency is improved, the research cost is saved, and a foundation is laid for rapid and accurate completion of drilling geological evaluation.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of drilling geological evaluation in the field of petroleum geology, and in particular to a core retrieval method, device, electronic equipment and medium based on rock hardness. Background Art

[0002] Core data is the most reliable data for obtaining underground geological information in oil and gas field exploration and development. The correctness of core depth is directly related to the accuracy of drilling geological evaluation. Due to the tension difference between the drill pipe and the cable in the logging system during the coring process, there is a certain difference between the core drilling depth and the logging depth. Therefore, before conducting research and analysis on the core, it is necessary to return the core to its original position, that is, according to the relationship between the lithology, electrical properties and physical properties of the rock, the core drilling depth is unified to the logging depth.

[0003] There are two main core tracing methods at present. One is the comparative tracing method based on lithology identification with the naked eye, but this method is greatly affected by human factors and has low tracing accuracy. The other is the comparative tracing method based on the natural gamma of the core, but this method requires ground core testing equipment, which is costly, inefficient and not conducive to real-time analysis on site. In addition, this method is suitable for coring sections with relatively complex lithology and rhythmic characteristics (such as sandstone and mudstone interbedded sections), but not for coring sections with a single lithology (such as pure carbonate rock or sandstone sections). Summary of the invention

[0004] The embodiments of the present invention provide a core retrieval method, device, electronic device and storage medium based on rock hardness, so as to realize fast and accurate core retrieval, improve work efficiency, save research costs, and lay a foundation for accurately completing drilling geological evaluation.

[0005] In a first aspect, an embodiment of the present invention provides a core homing method based on rock hardness, comprising:

[0006] Determine the top and bottom boundaries of the core to be returned and the preset core hardness measurement interval, and determine the core hardness measurement point according to the top and bottom boundaries of the core to be returned and the preset core hardness measurement interval; wherein the top and bottom depths of the core represent the core drilling depth;

[0007] Using a hardness measuring device to measure the hardness at the core hardness measuring point, and establishing a core hardness curve according to the average value of the core hardness;

[0008] The depth error of the target feature point is determined according to the core hardness curve and the pre-acquired logging curve, and the core to be relocated is relocated according to the depth error of the target feature point.

[0009] In a second aspect, an embodiment of the present invention further provides a core homing device based on rock hardness, comprising:

[0010] A core hardness measurement point determination module is used to determine the top and bottom boundaries of the core to be returned and the preset core hardness measurement interval, and determine the core hardness measurement point according to the top and bottom boundaries of the core to be returned and the preset core hardness measurement interval; wherein the top and bottom depths of the core represent the core drilling depth;

[0011] A core hardness curve establishment module, used to measure the hardness at the core hardness measurement point using a hardness measuring device, and establish a core hardness curve according to the core hardness average value;

[0012] The core homing module is used to determine the depth error of the target feature point according to the core hardness curve and the pre-acquired logging curve, and to home the core to be homed according to the depth error of the target feature point.

[0013] In a third aspect, an embodiment of the present invention further provides an electronic device, the electronic device comprising:

[0014] one or more processors;

[0015] A storage device for storing one or more programs;

[0016] When the one or more programs are executed by the one or more processors, the one or more processors implement the core retrieval method based on rock hardness described in any embodiment of the present invention.

[0017] In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the core retrieval method based on rock hardness described in any embodiment of the present invention.

[0018] The embodiment of the present invention provides a core homing method, device, electronic device and storage medium based on rock hardness, by determining the top and bottom boundaries of the core to be relocated and the preset core hardness measurement interval, and determining the core hardness measurement point according to the top and bottom boundaries of the core to be relocated and the preset core hardness measurement interval; wherein the top and bottom depths of the core represent the core drilling depth; hardness measurement is performed at the core hardness measurement point using a hardness measurement device, and a core hardness curve is established based on the average value of the core hardness; the depth error of the target feature point is determined based on the core hardness curve and the pre-acquired logging curve, and the core to be relocated is relocated based on the depth error of the target feature point. The technical solution of the embodiment of the present invention solves the problem of few core homing methods and low precision in drilling geological evaluation; through the core comparison homing method based on rock hardness, the core is quickly and accurately relocated, which improves work efficiency, saves research costs, and lays the foundation for accurately completing drilling geological evaluation. The present invention is suitable for core retrieval of both single lithology and complex lithology, has simple operation, no damage to the core, low cost, meets the purpose of reducing costs and increasing efficiency, and the core retrieval is effective quickly. It is easy to promote in oil fields and related scientific research institutes, has a large market demand and broad prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings. The drawings are only for the purpose of illustrating preferred embodiments and are not to be considered as limiting the present invention. Also, the same reference symbols are used throughout the drawings to represent the same parts. In the drawings:

[0020] Figure 1 is a flow chart of a core retrieval method based on rock hardness provided in an embodiment of the present invention;

[0021] Figure 2 It is a schematic diagram of a structure for marking rock hardness measurement points of a core to be returned provided in an embodiment of the present invention;

[0022] Figure 3 It is a well logging curve, a core hardness curve and a core homing schematic diagram provided in an embodiment of the present invention;

[0023] Figure 4 is a structural schematic diagram of a core homing device based on rock hardness provided in an embodiment of the present invention;

[0024] Figure 5 It is a structural schematic diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0026] Before discussing the exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flow charts. Although the flow charts describe the operations (or steps) as sequential processes, many of the operations (or steps) therein can be implemented in parallel, concurrently or simultaneously. In addition, the order of the operations can be rearranged. The process can be terminated when its operation is completed, but can also have additional steps not included in the accompanying drawings. The process can correspond to a method, function, procedure, subroutine, subprogram, etc.

[0027] Among them, the acquisition, storage, use and processing of data in the technical solution of this application are in compliance with the relevant provisions of national laws and regulations.

[0028] Figure 1 This is a flow chart of a core homing method based on rock hardness provided in an embodiment of the present invention. This embodiment is applicable to the case where the core is relocated based on rock hardness. The method of this embodiment can be executed by a core homing device based on rock hardness, and the device can be implemented in hardware and / or software. The device can be configured in a server for core homing based on rock hardness. The method specifically includes the following steps:

[0029] S110, determining the top and bottom boundaries of the core to be returned and a preset core hardness measurement interval, and determining the core hardness measurement point according to the top and bottom boundaries of the core to be returned and the preset core hardness measurement interval.

[0030] Among them, due to the tension difference between the drill pipe and the cable in the logging system during the drilling and coring process, there is a certain difference between the core drilling depth and the logging depth. Therefore, the core needs to be returned to its original position before studying the core.

[0031] Optionally, obtain the cores to be returned that have been drilled and placed in the core box in order according to the core barrel records; determine the length of each row of cores to be returned in the core box; wherein the top and bottom depths of the cores represent the core drilling depth. Determine the core hardness measurement point based on the top and bottom boundaries of the cores to be returned and the preset core hardness measurement interval, and measure the hardness of the cores to be returned at the core hardness measurement point.

[0032] As an optional but non-limiting implementation, the determining of the top and bottom boundaries of the core to be returned and the preset core hardness measurement interval, and determining the core hardness measurement point according to the top and bottom boundaries of the core to be returned and the preset core hardness measurement interval, includes but is not limited to steps A1-A3:

[0033] Step A1: Determine the positions of the top and bottom boundaries of the cores to be returned in the core box, and determine whether the order of each core to be returned is correct based on the exit records of the cores to be returned.

[0034] Step A2: Determine the length of each row of cores to be returned in the core box.

[0035] Step A3: Determine the hardness measurement points of each row of cores to be returned according to the top and bottom boundaries of the cores to be returned and the preset core hardness measurement spacing.

[0036] Among them, first determine the position of the top and bottom boundaries of the cores to be returned in the core box; then determine whether the order of each core to be returned in the core box is correct according to the record of the cores to be returned (if there is an error, adjust it correctly); then arrange the cores to be returned compactly to make the gaps between each core to be returned as small as possible. Use a length measuring device (such as a steel tape measure) to measure the total length of each row of cores to be returned in the core box one by one and record it (usually the length of the core box is 1m, but in actual situations the length of a row of cores is often less than 1m).

[0037] When determining the core hardness measurement points, since the logging sampling interval is usually 0.125m, the core hardness measurement interval is also 0.125m to ensure better consistency when comparing the two. Figure 2 , the core box is 1m long, at least two cores to be returned (indicated by dotted rectangles) are arranged in the core box in the order of exiting the core tube, and a mark is made every 0.125m from the bottom boundary of the core to be returned, and the depth value of each core hardness measurement point is determined according to the depth of the bottom boundary of the core to be returned in the core exiting the core tube record. The marking includes but is not limited to affixing a small label or marking with an erasable marker.

[0038] In an optional solution of the embodiment of the present invention, if the lithology of the core to be returned is particularly complex, and the appearance lithology of the core to be returned can be seen to the naked eye to have different changes within the range of 0.125m, then the preset core hardness measurement interval can be reduced when determining the core hardness measurement point. For example, starting from the bottom boundary of the core to be returned, a core hardness measurement point can be determined every 0.1m; by encrypting the determination of the core hardness measurement points, the problem of inaccurate core hardness measurement caused by the complex lithology of the core can be prevented, and the accuracy of the core hardness measurement can be improved.

[0039] S120, using a hardness measuring device to measure the hardness at the core hardness measuring point, and establishing a core hardness curve according to the average value of the core hardness.

[0040] Among them, the hardness measuring device in the embodiment of the present invention takes a handheld Leeb hardness tester as an example, and uses a handheld Leeb hardness tester to measure the hardness of the core to be returned. During measurement, the handheld Leeb hardness tester must be vertically close to the surface of the core to be returned. After pressing the release impact ball button, the handheld Leeb hardness tester will display the rock hardness value measured this time and record the hardness value of the core hardness measurement point. The depth of the core hardness measurement point is matched one by one with the measured average value of the core hardness, and a core hardness curve is established.

[0041] As an optional but non-limiting implementation, the hardness measurement device is used to perform hardness measurement at the core hardness measurement point, and a core hardness curve is established according to the core hardness average value, including but not limited to steps B1-B2:

[0042] Step B1: using a hardness measuring device to determine the rock hardness value of the core to be returned at the core hardness measuring point.

[0043] Step B2: Establish a core hardness curve based on the average value of the core hardness determined at each core hardness measurement point.

[0044] Among them, the impact-rebound method is a rock hardness method that does not damage the sample. The impact-rebound method uses a non-destructive tool such as a micro-rebound hammer (MRH) to mechanically characterize the rock. The measured unconfined compressive strength (UCS) is the response of the rock hardness. According to this principle, the use of a handheld Leeb hardness tester can meet the rock hardness measurement requirements. This type of instrument uses the ratio of the impact body rebound velocity (VB) to the impact velocity (VA) to express the Leeb hardness value (HL), and its calculation formula is HL = 1000 × (VB / VA); the use of a handheld Leeb hardness tester to measure the hardness of the core to be returned has the characteristics of simple operation and fast measurement speed.

[0045] Optionally, the depth of the hardness measurement point of the core to be returned and the average value of the core hardness are loaded into professional single well mapping software (such as logging interpretation software or Excel) to generate a core hardness curve corresponding to the core hardness and depth.

[0046] As an optional but non-limiting implementation, the hardness measurement is performed at the core hardness measurement point using a hardness measurement device, and a core hardness curve is established according to the core hardness average value, which also includes but is not limited to steps C1-C3:

[0047] Step C1: Perform multiple core hardness measurements on the core to be returned at each core hardness measurement point to determine at least five core hardness values.

[0048] Step C2: Use the truncated mean method to determine the average hardness value of each measuring point of the core to be returned.

[0049] Step C3: establishing a core hardness curve according to the average hardness value of each measuring point.

[0050] Among them, due to human operation factors, the handheld Leeb hardness tester may not be in completely vertical contact with the surface of the core to be returned, resulting in differences in the results of each measurement. In order to minimize the error, multiple measurements are required. According to practical experience, it is best to measure each core hardness measurement point 7 times, and record the core hardness value each time.

[0051] In an optional scheme of the embodiment of the present invention, the average hardness value of each measurement point of the core to be returned is calculated by the truncated mean method, that is, the maximum and minimum values ​​in the 7 measurement results are removed, and the average value of the other 5 measurement values ​​is taken as the final core hardness value of the core hardness measurement point, and a data table of the core hardness measurement point depth and the core hardness average value is established. In the embodiment of the present invention, there is no specific restriction on the number of core hardness measurements; at the same time, there is no specific restriction on the calculation method of the final hardness average value of the core to be returned, and the calculation method of the final hardness average value of the core to be returned also includes but is not limited to taking the median, mode and variance of multiple hardness measurement values.

[0052] S130, determining the depth error of the target feature point according to the core hardness curve and the pre-acquired logging curve, and homing the core to be relocated according to the depth error of the target feature point.

[0053] Among them, the pre-acquired logging curves are determined, and the pre-acquired logging curves include but are not limited to sonic logging curves, neutron logging curves and density logging curves. When conducting logging research, the logging depth and density (DEN), sonic (DT) and neutron (CN) data are loaded in professional single well mapping software (such as logging interpretation software or Excel) to generate corresponding logging curves. It should be emphasized that the pre-acquired logging curves in the embodiment of the present invention do not need to load logging data of all depths, but only need to load data within a depth range of about 10m more than the upper and lower depths of the core to be returned (the difference between the core drilling depth and the logging depth generally does not exceed ±10m).

[0054] Optionally, by comparing the core hardness curve and the pre-acquired logging curve, the target feature point is obtained, and the depth error of the two depth curves at the target feature point is determined; the core to be returned is returned according to the depth error.

[0055] As an optional but non-limiting implementation, the depth error of the target feature point is determined based on the core hardness curve and the pre-acquired logging curve, and the core to be relocated is relocated based on the depth error of the target feature point, including but not limited to steps D1-D3:

[0056] Step D1: Determine the target characteristic point of the depth curve based on the core hardness curve and the pre-acquired logging curve.

[0057] Among them, see Figure 3 The pre-acquired logging curve takes the acoustic logging curve as an example, compares the acoustic logging curve with the core hardness curve, finds the most significant target feature point between the two curves (preferably similar peaks), and marks 3-5 feature points. Figure 3 There are 5 very similar marked target feature points between the medium acoustic logging curve and the core hardness curve.

[0058] Step D2: respectively obtaining the depth value of the target feature point on the core hardness curve and the pre-acquired well logging curve, and determining the depth error of the target feature point according to the depth value of the target feature point.

[0059] The difference between the acoustic logging depth of each target feature point and the core drilling depth is the depth error of the target feature point. The core to be relocated is processed based on the depth error at the target feature point. The depth error value can be positive or negative. Figure 3 The depth difference of the five target feature points is 2.60m, so the error between the core drilling depth and the logging depth is 2.60m.

[0060] Step D3: performing a homing process on the core to be relocated according to the depth error at the target feature point.

[0061] The core drilling depth plus the depth error value of the target feature point can be used to obtain the core homing depth. For example, the depth value of the target feature point marked as 1 in the sonic logging curve is 5141.5m, and the depth value of the target feature point marked as 1 in the core hardness curve determined by the core hardness is 5138.9m, and the depth error of the target feature point is 2.6m. The core drilling depth plus the depth error is used to obtain the core homing depth, and the core homing process is completed; that is, the depth value of the target feature point marked as 1 in the core hardness curve is 5138.9m, and the depth error of 2.6m is added to obtain the core homing depth of 5141.5m.

[0062] Optional, such as Figure 3 As shown in the figure, the core section drilling depth is 5132.60m~5155.70m, and the actual depth of the core section through the return is 5135.20m~5158.30m. Figure 3From the third depth curve, it can be seen that the variation patterns of the core hardness curve and the sonic logging curve are very consistent.

[0063] As an optional but non-limiting implementation, the steps of respectively obtaining the depth value of the target feature point on the core hardness curve and the pre-acquired well logging curve, and determining the depth error of the target feature point according to the depth value of the target feature point, include but are not limited to steps E1-E3:

[0064] Step E1: Determine a first depth value of a target feature point according to the core hardness curve.

[0065] Step E2: Determine the second depth value of the target feature point based on the pre-acquired logging curve.

[0066] Step E3: Determine the depth error of the target feature point according to the first depth value and the second depth value.

[0067] Among them, the first depth value of the target feature point is obtained through the core hardness curve; the second depth value of the target feature point is obtained through the pre-acquired logging curve; the first depth value is subtracted from the second depth value to obtain the depth error of the target feature point. For example, the second depth value of the target feature point marked as 1 in the sonic logging curve is 5141.5m, and the first depth value of the target feature point marked as 1 in the core hardness curve is 5138.9m. The second depth value is subtracted from the first depth value to obtain the depth error of the target feature point of 2.6m.

[0068] In an optional solution of the embodiment of the present invention, if the depth errors of multiple feature points are inconsistent, the average value can be taken as the error depth; for example, the depth error of the first feature point is 2.6m, the depth error of the second feature point is 2.5m, and the depth error of other feature points is 2.55m, then the average value of multiple feature points is obtained as the depth error of the final target feature point. There may be errors when judging the depth of the target feature point by naked eyes, but generally it will not exceed the distance between the two depth measurement points, that is, 0.25m; usually the peak of the depth curve is taken as the target feature point to reduce the possibility of errors.

[0069] The embodiment of the present invention provides a core homing method based on rock hardness, by determining the top and bottom boundaries of the core to be relocated and the preset core hardness measurement interval, and determining the core hardness measurement point according to the top and bottom boundaries of the core to be relocated and the preset core hardness measurement interval; wherein the top and bottom depths of the core represent the core drilling depth; a hardness measurement device is used to measure the hardness at the core hardness measurement point, and a core hardness curve is established according to the average value of the core hardness; the depth error of the target feature point is determined according to the core hardness curve and the pre-acquired logging curve, and the core to be relocated is relocated according to the depth error of the target feature point. The technical solution of the embodiment of the present invention is adopted to solve the problem of few core homing methods and low precision in drilling geological evaluation; through the core comparison homing method based on rock hardness, the core is quickly and accurately relocated, the work efficiency is improved, the research cost is saved, and the foundation is laid for quickly and accurately completing the drilling geological evaluation. The present invention is suitable for core retrieval of both single lithology and complex lithology, has simple operation, no damage to the core, low cost, meets the purpose of reducing costs and increasing efficiency, and the core retrieval is effective quickly, is easy to promote in oil fields and related scientific research institutes, has a large market demand and broad prospects.

[0070] Figure 4 This is a schematic diagram of the structure of a core homing device based on rock hardness provided in an embodiment of the present invention. The technical solution of this embodiment can be applied to the situation of homing the core based on rock hardness. The device can be implemented by software and / or hardware and is generally integrated on any electronic device with network communication function, including but not limited to: servers, computers, personal digital assistants and other devices. Figure 4 As shown, the core homing device based on rock hardness provided in this embodiment may include: a core hardness measurement point determination module 410, a core hardness curve establishment module 420 and a core homing module 430; wherein,

[0071] The core hardness measurement point determination module 410 is used to determine the top and bottom boundaries of the core to be returned and the preset core hardness measurement interval, and determine the core hardness measurement point according to the top and bottom boundaries of the core to be returned and the preset core hardness measurement interval; wherein the top and bottom depths of the core represent the core drilling depth;

[0072] A core hardness curve establishing module 420 is used to measure the hardness at the core hardness measuring point using a hardness measuring device, and establish a core hardness curve according to the core hardness average value;

[0073] The core homing module 430 is used to determine the depth error of the target feature point according to the core hardness curve and the pre-acquired logging curve, and to home the core to be homed according to the depth error of the target feature point.

[0074] Based on the above embodiment, optionally, the core hardness measurement point determination module includes:

[0075] Determine the positions of the top and bottom boundaries of the cores to be returned in the core box, and determine whether the order of each core to be returned is correct according to the exit record of the cores to be returned;

[0076] Determine the length of each row of cores to be returned in the core box;

[0077] The hardness measurement points of each row of the cores to be returned are determined according to the top and bottom boundaries of the cores to be returned and the preset core hardness measurement spacing.

[0078] Based on the above embodiment, optionally, the core hardness curve establishment module includes:

[0079] Using a hardness measuring device to determine the Leeb hardness value of the core to be returned at the core hardness measuring point;

[0080] A core hardness curve is established based on the average value of the core hardness determined at each core hardness measurement point.

[0081] Based on the above embodiment, optionally, the core hardness curve establishment module further includes:

[0082] Conduct core hardness measurements on the cores to be returned multiple times at the core hardness measurement points to determine at least five core hardness values;

[0083] The average hardness value of each measuring point of the core to be returned is determined by using the truncated mean method;

[0084] A core hardness curve is established according to the average hardness value of each measuring point.

[0085] Based on the above embodiment, optionally, the core homing module includes:

[0086] Determine the target characteristic points of the depth curve based on the core hardness curve and the pre-acquired logging curve;

[0087] Respectively obtain the depth value of the target feature point on the core hardness curve and the pre-acquired well logging curve, and determine the depth error of the target feature point according to the depth value of the target feature point;

[0088] The core to be returned is returned according to the depth error at the target feature point.

[0089] Based on the above embodiment, optionally, the core homing module further includes:

[0090] Determining a first depth value of a target feature point according to the core hardness curve;

[0091] Determining a second depth value of the target feature point according to the pre-acquired well logging curve;

[0092] A depth error of the target feature point is determined according to the first depth value and the second depth value.

[0093] The core locating device based on rock hardness provided in the embodiment of the present invention can execute the core locating method based on rock hardness provided in any embodiment of the present invention mentioned above, and has the corresponding functions and beneficial effects of executing the core locating method based on rock hardness. For the detailed process, please refer to the relevant operations of the core locating method based on rock hardness in the aforementioned embodiment.

[0094] Figure 5 1 is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention. The electronic device 10 is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device may also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0095] like Figure 5 As shown, the electronic device 10 includes at least one processor 11, and a memory connected to the at least one processor 11, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 to the random access memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other through a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0096] A number of components in the electronic device 10 are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0097] The processor 11 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as a core retrieval method based on rock hardness.

[0098] In some embodiments, the core homing method based on rock hardness may be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or installed on the electronic device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the core homing method based on rock hardness described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to perform the core homing method based on rock hardness in any other appropriate manner (e.g., by means of firmware).

[0099] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0100] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0101] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in combination with an instruction execution system, device or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0102] To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0103] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0104] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0105] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0106] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A core retrieval method based on rock hardness, characterized in that: The method comprises: Determine the top and bottom boundaries of the core to be returned and the preset core hardness measurement interval, and determine the core hardness measurement point according to the top and bottom boundaries of the core to be returned and the preset core hardness measurement interval; wherein the top and bottom depths of the core represent the core drilling depth; Using a hardness measuring device to measure the hardness at the core hardness measuring point, and establishing a core hardness curve according to the average value of the core hardness; The depth error of the target feature point is determined according to the core hardness curve and the pre-acquired logging curve, and the core to be relocated is relocated according to the depth error of the target feature point.

2. The method according to claim 1, characterized in that The determining of the top and bottom boundaries of the core to be returned and the preset core hardness measurement interval, and determining the core hardness measurement point according to the top and bottom boundaries of the core to be returned and the preset core hardness measurement interval, includes: Determine the positions of the top and bottom boundaries of the cores to be returned in the core box, and determine whether the order of each core to be returned is correct according to the exit record of the cores to be returned; Determine the length of each row of cores to be returned in the core box; The hardness measurement points of each row of the cores to be returned are determined according to the top and bottom boundaries of the cores to be returned and the preset core hardness measurement spacing.

3. The method according to claim 1, characterized in that The hardness measurement device is used to measure the hardness at the core hardness measurement point, and a core hardness curve is established according to the average value of the core hardness, including: Using a hardness measuring device to determine the rock hardness value of the core to be returned at the core hardness measuring point; A core hardness curve is established based on the average value of the core hardness determined at each core hardness measurement point.

4. The method according to claim 3, characterized in that The hardness measurement device is used to perform hardness measurement at the core hardness measurement point, and a core hardness curve is established according to the core hardness average value, and further includes: Conduct multiple core hardness measurements on the core to be returned at each core hardness measurement point to determine at least five core hardness values; The average hardness value of each measuring point of the core to be returned is determined by using the truncated mean method; A core hardness curve is established according to the average hardness value of each measuring point.

5. The method according to claim 1, characterized in that The step of determining the depth error of the target feature point according to the core hardness curve and the pre-acquired logging curve, and homing the core to be relocated according to the depth error of the target feature point, comprises: Determine the target characteristic points of the depth curve based on the core hardness curve and the pre-acquired logging curve; Respectively obtain the depth value of the target feature point on the core hardness curve and the pre-acquired well logging curve, and determine the depth error of the target feature point according to the depth value of the target feature point; The core to be returned is returned according to the depth error at the target feature point.

6. The method according to claim 5, characterized in that The step of respectively obtaining the depth values ​​of the target feature points on the core hardness curve and the pre-acquired well logging curve, and determining the depth error of the target feature points according to the depth values ​​of the target feature points, includes: Determining a first depth value of a target feature point according to the core hardness curve; Determining a second depth value of the target feature point according to the pre-acquired well logging curve; A depth error of the target feature point is determined according to the first depth value and the second depth value.

7. A core homing device based on rock hardness, characterized in that: The device comprises: A core hardness measurement point determination module is used to determine the top and bottom boundaries of the core to be returned and the preset core hardness measurement interval, and determine the core hardness measurement point according to the top and bottom boundaries of the core to be returned and the preset core hardness measurement interval; wherein the top and bottom depths of the core represent the core drilling depth; A core hardness curve establishment module, used to measure the hardness at the core hardness measurement point using a hardness measuring device, and establish a core hardness curve according to the core hardness average value; The core homing module is used to determine the depth error of the target feature point according to the core hardness curve and the pre-acquired logging curve, and to home the core to be homed according to the depth error of the target feature point.

8. The device according to claim 7, characterized in that The core hardness measurement point determination module comprises: Determine the positions of the top and bottom boundaries of the cores to be returned in the core box, and determine whether the order of each core to be returned is correct according to the exit record of the cores to be returned; Determine the length of each row of cores to be returned in the core box; The hardness measurement points of each row of the cores to be returned are determined according to the top and bottom boundaries of the cores to be returned and the preset core hardness measurement spacing.

9. An electronic device, characterized in that: include: one or more processors; A storage device for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the rock hardness-based core retrieval method described in any one of claims 1-6.

10. A storage medium containing computer executable instructions, characterized in that: When the computer executable instructions are executed by a computer processor, they are used to perform the rock hardness-based core retrieval method as described in any one of claims 1 to 6.

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