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

Abstract

Embodiments of the present application disclose a core homing method and device based on rock hardness, an electronic device and a storage medium. The method comprises determining a top and bottom boundary of a core to be homed and a preset core hardness measurement interval, and determining a core hardness measurement point based on the top and bottom boundary of the core to be homed and the preset core hardness measurement interval; performing hardness measurement at the core hardness measurement point using a hardness measurement device, and establishing a core hardness curve based on a core hardness average value; determining a depth error of a target feature point based on the core hardness curve and a previously obtained logging curve, and homing the core to be homed based on the depth error of the target feature point. The technical solution of the embodiments of the present application realizes fast and accurate homing of the core by using the core homing method based on rock hardness, improves work efficiency, saves research cost, and lays a foundation for fast and accurate completion of drilling geological evaluation.

Description

TECHNICAL FIELD

[0001] The embodiment of the present application relates to the drilling geological evaluation technical field in the field of petroleum geology, and particularly relates to a core homing method and device based on rock hardness, an electronic equipment and a medium. BACKGROUND

[0002] Core data is the most reliable data for obtaining underground geological information in oil and gas field exploration and development, and whether the core depth is correct directly relates to the accuracy of drilling geological evaluation. Due to the difference between the tension of the drill rod and the cable in the logging system in the process of drilling coring, there is a certain difference between the core drilling depth and the logging depth, so before the core is analyzed, the core homing must be carried out, that is, according to the lithology, electrical property and physical property of the rock, the core drilling depth is unified to the logging depth.

[0003] At present, there are two main core homing methods, one is a contrast homing method based on naked eye lithology identification, but the method is greatly influenced by human factors and has low homing accuracy; the other is a contrast homing method based on core natural gamma, but the method needs a core ground testing device, has high cost, low efficiency and is not conducive to real-time analysis on site, in addition, the method is suitable for the coring section with relatively complex lithology and rhythm characteristics (such as sand and mud interbedded section), and is not suitable for the single lithology coring section (such as pure carbonate rock or sandstone section). SUMMARY

[0004] The embodiment of the present application provides a core homing method and device based on rock hardness, an electronic equipment and a storage medium, so as to realize fast and accurate core homing, improve work efficiency, save research cost and lay a foundation for accurately completing drilling geological evaluation.

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

[0006] determining the top and bottom boundaries of the core to be homed and a preset core hardness measurement interval, and determining a core hardness measurement point according to the top and bottom boundaries of the core to be homed and the preset core hardness measurement interval; wherein the core top and bottom depth represents the core drilling depth;

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

[0008] 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 homed according to the depth error of the target feature point.

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

[0010] a core hardness measurement point determination module configured to determine a top and bottom boundary of a core to be homed and a preset core hardness measurement interval, and determine a core hardness measurement point according to the top and bottom boundary of the core to be homed and the preset core hardness measurement interval; wherein the top and bottom depths of the core represent a drilling depth of the core;

[0011] a core hardness curve establishment module configured to perform hardness measurement at the core hardness measurement point by using a hardness measurement device, and establish a core hardness curve according to a core hardness average value;

[0012] a core homing module configured to determine a depth error of a target feature point according to the core hardness curve and a logging curve obtained in advance, and home the core to be homed according to the depth error of the target feature point.

[0013] In a third aspect, an electronic device is provided, and the electronic device includes:

[0014] one or more processors;

[0015] a memory configured to store 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 homing method based on rock hardness according to any of the embodiments of the present application.

[0017] In a fourth aspect, a computer readable storage medium is provided, and the computer readable storage medium stores a computer program, and the program is executed by a processor to implement the core homing method based on rock hardness according to any of the embodiments of the present application.

[0018] The embodiment of the present application provides a core homing method and device based on rock hardness, an electronic device and a storage medium, which determines the top and bottom boundaries of a core to be homed and a preset core hardness measurement interval, and determines a core hardness measurement point according to the top and bottom boundaries of the core to be homed and the preset core hardness measurement interval; wherein the top and bottom depths of the core represent the drilling depth of the core; 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 core hardness; the depth error of a target feature point is determined according to the core hardness curve and a previously obtained logging curve, and the core to be homed is homed according to the depth error of the target feature point. The technical scheme of the embodiment of the present application solves the problems of few core homing methods and low accuracy in drilling geological evaluation; through the core comparison and homing method based on rock hardness, the core is quickly and accurately homed, the work efficiency is improved, the research cost is saved, and the foundation for accurately completing drilling geological evaluation is laid. The present application is suitable for core homing of single lithology and core homing of complex lithology, is simple to operate, does not damage the core, is low in cost, meets the purpose of cost reduction and efficiency improvement, has a quick effect on core homing, is easy to popularize in oil fields and related scientific research institutes, has large market demand and wide prospects. BRIEF DESCRIPTION OF DRAWINGS

[0019] Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments when read in conjunction with the accompanying drawings. The drawings merely illustrate preferred embodiments of the present application and therefore are not to be considered limiting any matter described herein. Like reference numerals are used to describe like parts and components throughout the accompanying drawings. In the drawings:

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

[0021] Figure 2 is a structural schematic view of a rock hardness measurement point marking on a core to be homed provided in the embodiment of the present application;

[0022] Figure 3 is a logging curve, core hardness curve and core homing schematic view provided in the embodiment of the present application;

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

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

[0025] The application will be described in further detail below with reference to the drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. In addition, it should be noted that, for the purpose of description, only the parts related to the present application are shown in the drawings rather than all the structures.

[0026] Before the example embodiments are discussed in more detail, it should be mentioned that some of the example embodiments are described as processes or methods depicted as flow charts. While the processes are described as sequential processes, many of the operations (or steps) can be performed in parallel, concurrently or at the same time. In addition, the order of the operations can be re-arranged. The processes can be terminated when their operations are completed, but can also have additional steps not included in the figure. The processes can correspond to methods, functions, routines, subroutines, etc.

[0027] In the present application, the acquisition, storage, use and processing of data comply with the relevant provisions of national laws and regulations.

[0028] Figure 1 is a flow chart of a core homing method based on rock hardness provided in an embodiment of the present application. The present embodiment can be applied to the homing of cores based on rock hardness. The method of the present embodiment can be performed by a core homing device based on rock hardness, which 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 comprises the following steps:

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

[0030] In the process of drilling and coring, there is a difference in tension between the drill pipe and the cable in the logging system, which results in a certain difference between the drilling depth of the core and the logging depth. Therefore, the core needs to be homed before it is studied.

[0031] Optionally, the core to be homed is obtained from a drilled well, and the core to be homed is placed in a core box in order according to the core barrel record; the length of each row of the core to be homed in the core box is determined; wherein the core top and bottom depth represents the drilling depth of the core. The core hardness measurement point is determined based on the top and bottom boundaries of the core to be homed and the preset core hardness measurement interval, and the hardness of the core to be homed is measured at the core hardness measurement point.

[0032] As an optional but non-limiting implementation, 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 based on the top and bottom boundaries of the core to be relocated 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 discharge record 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 based on the top and bottom boundaries of the cores to be returned and the preset core hardness measurement spacing.

[0036] First, determine the top and bottom boundaries of the cores to be returned within the core box. Then, based on the records of the cores leaving the core box, confirm whether the order of each core in the core box is correct (if incorrect, adjust it). Then, arrange the cores to be returned tightly so that the gaps between each core are 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 in the core box and record it (usually the core box is 1 meter long, but in reality, the length of a row of cores is often less than 1 meter).

[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 (represented by dashed rectangles) are arranged in the core box in the order they were ejected from the core barrel. Marks are made every 0.125m from the bottom boundary of the cores to be returned. The depth of each core hardness measurement point is determined based on the depth of the bottom boundary of the cores to be returned as recorded in the core ejection record. Marking includes, but is not limited to, attaching small labels or using an erasable marker.

[0038] In an optional solution of the present invention, if the lithology of the core to be relocated is particularly complex, and the apparent lithology of the core to be relocated varies within a range of 0.125m, the preset core hardness measurement interval can be reduced when determining the core hardness measurement points. For example, starting from the bottom boundary of the core to be relocated, a core hardness measurement point can be determined every 0.1m. By increasing the number of core hardness measurement points, inaccurate core hardness measurements caused by complex core lithology can be prevented, thereby improving the accuracy of core hardness measurements.

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

[0040] In the embodiment of the present application, the hardness measuring device is a handheld Leeb hardness tester. When measuring the hardness of the core to be homed, the handheld Leeb hardness tester must be perpendicular to and close to the surface of the core to be homed. After pressing the release impact ball button, the handheld Leeb hardness tester displays the rock hardness value measured this time, and the hardness value of the core hardness measurement point is recorded. The core hardness measurement point depth and the measured core hardness average value are one-to-one corresponding, and the core hardness curve is established.

[0041] As an optional but non-limiting implementation, the hardness measuring device is used to measure the hardness at the core hardness measurement point, and the core hardness curve is established according to the core hardness average value, which includes but is 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 homed at the core hardness measurement point.

[0043] Step B2: establishing a core hardness curve according to the core hardness average value determined at each core hardness measurement point.

[0044] The impact rebound method is a non-destructive rock hardness method. The impact rebound method uses a non-destructive tool, micro-rebound hammer (MRH), to characterize the mechanics of rock. The measured unconfined compressive strength (UCS) is the response of rock hardness. According to this principle, a handheld Leeb hardness tester can meet the requirements of rock hardness measurement. This type of instrument expresses the Leeb hardness value (HL) as the ratio of impact body rebound velocity (VB) to impact velocity (VA), and the calculation formula is HL = 1000 × (VB / VA). The handheld Leeb hardness tester is used to measure the hardness of the core to be homed, which has the characteristics of simple operation and fast measurement speed.

[0045] Optionally, the hardness measurement point depth of the core to be homed and the core hardness average value are loaded in 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 measuring device is used to measure the hardness at the core hardness measurement point, and the core hardness curve is established according to the core hardness average value, which includes but is not limited to steps C1-C3:

[0047] Step C1: measuring the core hardness of the core to be homed at each core hardness measurement point multiple times to determine at least five core hardness values.

[0048] Step C2: The average hardness value of each measuring point of the core to be homed is determined by using the truncated mean method.

[0049] Step C3: The core hardness curve is established according to the average hardness value of each measuring point.

[0050] However, due to human operation factors, the handheld Leeb hardness tester may not be in full contact with the surface of the core to be homed, resulting in differences in the measurement results each time. In order to minimize the error, multiple measurements are required. According to practical experience, the core hardness of each measuring point is measured 7 times, and the core hardness value of each time is recorded.

[0051] In an optional scheme of the embodiment of the present application, the average hardness value of each measuring point of the core to be homed is calculated by using the truncated mean method, that is, the maximum value and the minimum value of 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 measuring point, and a core hardness measuring point depth and core hardness average value data table is established. The number of core hardness measurements in the embodiment of the present application is not specifically limited; and the calculation method of the final average hardness value of the core to be homed is not specifically limited, and the calculation method of the final average hardness value of the core to be homed further includes but is not limited to taking the median, mode and variance of multiple hardness measurement values.

[0052] S130, 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 homed is homed according to the depth error of the target feature point.

[0053] The pre-acquired logging curve includes but is not limited to acoustic logging curve, neutron logging curve and density logging curve. When logging research is performed, the logging depth and density (DEN), acoustic wave (DT) and neutron (CN) data are loaded in professional single well mapping software (such as logging interpretation software or Excel) to generate the corresponding logging curve. It needs to be emphasized that the pre-acquired logging curve in the embodiment of the present application does not need to load all depth logging data, but only needs to load the data in the depth range of about 10 m above and below the depth of the core to be homed (the difference between the core drilling depth and the logging depth generally does not exceed ±10 m).

[0054] Optionally, the target feature point is acquired by comparing the core hardness curve and the pre-acquired logging curve, and the depth error of the target feature point is determined. The core to be homed is homed according to the depth error.

[0055] As an optional but non-limiting implementation, 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 positioned is positioned according to the depth error of the target feature point, including but not limited to steps D1-D3:

[0056] Step D1: determining the depth curve target feature point according to the core hardness curve and the pre-acquired logging curve.

[0057] Wherein, referring to 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 prominent target feature point (preferably similar peak) between the two curves, and marks 3-5 feature points. As shown in the accompanying Figure 3 There are 5 very similar marked target feature points between the acoustic logging curve and the core hardness curve.

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

[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, and the core to be positioned is positioned according to the depth error of the target feature point. Wherein, the depth error value can be positive or negative, as shown in the accompanying Figure 3 The depth difference of the 5 target feature points is 2.60m, so the core drilling depth and the logging depth error is 2.60m.

[0060] Step D3: positioning the core to be positioned according to the depth error of the target feature point.

[0061] Wherein, the core drilling depth plus the depth error value of the target feature point can obtain the core positioning depth. For example, the depth value of the target feature point marked as 1 in the acoustic 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, the depth error of the target feature point is 2.6m. The core drilling depth plus the depth error obtains the core positioning depth, and the core positioning processing is completed; that is, the depth value of the core positioning at the target feature point marked as 1 in the core hardness curve is 5138.9m plus the depth error 2.6m, and the depth value of the core positioning is 5141.5m.

[0062] Optionally, as shown in Figure 3 , the core section drilling depth is 5132.60m-5155.70m, and the actual depth of the core section after positioning is 5135.20m-5158.30m, from Figure 3As can be seen from the third depth curve, the core hardness curve is very consistent with the acoustic logging curve.

[0063] As an optional but non-limiting implementation, the respective acquisition of the core hardness curve and the depth value of the target feature point on the pre-acquired logging curve, and the determination of 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: determining the first depth value of the target feature point according to the core hardness curve.

[0065] Step E2: determining the second depth value of the target feature point according to the pre-acquired logging curve.

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

[0067] Wherein, the first depth value of the target feature point is acquired through the core hardness curve; the second depth value of the target feature point is acquired through the pre-acquired logging curve; the difference between the first depth value and the second depth value is the depth error of the target feature point. For example, the second depth value of the target feature point marked as 1 in the acoustic logging curve is 5141.5m, the first depth value of the target feature point marked as 1 in the core hardness curve is 5138.9m, and the difference between the second depth value and the first depth value is the depth error of the target feature point, which is 2.6m.

[0068] In an optional scheme of the embodiment of the present application, if the depth errors of the 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 errors of the other feature points are 2.55m, and the average value of the multiple feature points is taken as the depth error of the final target feature point. Wherein, there may be an error in the naked eye judgment of the depth of the target feature point, but generally it will not exceed the interval of two depth measurement points, i.e. 0.25m; generally, the peak of the depth curve is taken as the target feature point, so as to reduce the possibility of error.

[0069] The embodiment of the present application provides a core homing method based on rock hardness, which determines the top and bottom boundaries of a core to be homed and a preset core hardness measurement interval, and determines core hardness measurement points according to the top and bottom boundaries of the core to be homed and the preset core hardness measurement interval; wherein the top and bottom depths of the core represent the drilling depth of the core; a hardness measurement device is used to measure the hardness at the core hardness measurement points, and a core hardness curve is established according to the average core hardness; the depth error of a target feature point is determined according to the core hardness curve and a pre-acquired logging curve, and the core to be homed is homed according to the depth error of the target feature point. The technical scheme of the embodiment of the present application solves the problems 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 homed, the work efficiency is improved, the research cost is saved, and a foundation is laid for quickly and accurately completing drilling geological evaluation. The present application is suitable for core homing of single lithology and core homing of complex lithology, is simple to operate, does not damage the core, is low in cost, meets the purpose of cost reduction and efficiency increase, has a quick effect of core homing, is easy to popularize in oil fields and related scientific research institutes, has large market demand and wide prospects.

[0070] Figure 4 Fig. 1 is a structural schematic diagram of a core homing device based on rock hardness provided in the embodiment of the present application. The technical scheme of the present embodiment is applicable to the case of homing the core based on rock hardness. The device can be realized 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 the like. As shown in Fig. 1, the core homing device based on rock hardness provided in the present embodiment can include: a core hardness measurement point determination module 410, a core hardness curve establishment module 420, and a core homing module 430; wherein, Figure 4

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

[0072] The core hardness curve establishment module 420 is configured to use a hardness measurement device to measure the hardness at the core hardness measurement points, and establish a core hardness curve according to the average core hardness.

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

[0074] ​On the basis of the above-mentioned embodiment, optionally, the core hardness measurement point determination module comprises:

[0075] The position of the top and bottom boundaries of the cores to be homed in the core magazine is determined, and whether the order of each core to be homed in is correct is determined according to the core barrel record of the core to be homed in.

[0076] The length of each row of cores to be homed in in the core magazine is determined.

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

[0078] On the basis of the above-mentioned embodiment, optionally, the core hardness curve establishment module comprises:

[0079] The Hertz hardness value of the core to be homed in at the core hardness measurement point is determined by using a hardness measurement device.

[0080] The core hardness curve is established according to the average value of the core hardness determined at each core hardness measurement point.

[0081] On the basis of the above-mentioned embodiment, optionally, the core hardness curve establishment module further comprises:

[0082] The core hardness of the core to be homed in is measured at the core hardness measurement point for multiple times to determine at least five core hardness values.

[0083] The average hardness value of each measurement point of the core to be homed in is determined by using the truncated mean method.

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

[0085] On the basis of the above-mentioned embodiment, optionally, the core homing module comprises:

[0086] The depth curve target feature point is determined according to the core hardness curve and the pre-acquired logging curve.

[0087] The depth value of the target feature point on the core hardness curve and the pre-acquired logging curve is acquired respectively, and the depth error of the target feature point is determined according to the depth value of the target feature point.

[0088] The core to be homed in is homed according to the depth error of the target feature point.

[0089] On the basis of the above-mentioned embodiment, optionally, the core homing module further comprises:

[0090] The first depth value of the target feature point is determined according to the core hardness curve.

[0091] According to the pre-acquired logging curve, a second depth value of the target feature point is determined;

[0092] According to the first depth value and the second depth value, a depth error of the target feature point is determined.

[0093] The core homing device based on rock hardness provided in the embodiments of the present application can execute the core homing method based on rock hardness provided in any of the embodiments of the present application, has the corresponding functions and advantages of executing the core homing method based on rock hardness, and the detailed processes refer to the related operations of the core homing method based on rock hardness in the foregoing embodiments.

[0094] Figure 5 is a structural schematic diagram of an electronic device provided in an embodiment of the present application. The electronic device 10 is intended to represent various forms of digital computers, such as laptops, desktops, tablets, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. The electronic device can also represent various forms of mobile devices, such as personal digital processors, cellular telephones, 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 meant to be examples only, and are not intended to limit the implementations of the present application described and / or claimed in this document.

[0095] As shown in Figure 5 The electronic device 10 includes at least one processor 11, and a memory, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., which is communicatively connected to the at least one processor 11, wherein the memory stores a computer program executable by the at least one processor. The processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or loaded from the storage unit 18 into 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] The plurality 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 magnetic 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 can be any general-purpose and / or specialized processing component 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 specialized artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as the rock hardness-based core retrieval method.

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

[0099] Various embodiments of the systems and techniques described 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), system-on-chip systems (SOCs), programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments can include being implemented in one or more computer programs that are executable and / or interpreted on a programmable system that includes 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, such that when the computer program is executed by the processor, the functions / operations specified in the flowcharts and / or block diagrams are implemented. The computer program may be executed entirely on the machine, partially on the machine, as a stand-alone software package, partially on the machine and partially on a remote machine, or entirely on a remote machine or server.

[0101] In the context of the present application, a computer-readable storage medium can be a tangible medium that can contain or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. A computer-readable storage medium can include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium can be a machine-readable signal medium. More specific examples of a machine-readable storage medium will include one or more lines of a program of instructions in a transitory signal, a portable computer diskette, 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 disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0102] To provide for interaction with a user, the systems and techniques described here can 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 a trackball) by which the user can provide input to the electronic device. Other kinds of devices can be used to provide for interaction with a user as well; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form, including acoustic, speech, or tactile input.

[0103] The systems and techniques described here can be implemented in a computing system that includes a back end component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front end component (e.g., a user computer having a graphical user interface or a Web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such back end, middleware, or front end components. The components of the system can 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), blockchain network, and the Internet.

[0104] The computing system can include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can 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 large management difficulty and weak business scalability in traditional physical host and VPS service.

[0105] It should be understood that the various forms of flow shown above can be used to reorder, add or delete steps. For example, each step described in the present application can be executed in parallel, sequentially or in a different order, as long as the desired results of the technical solutions of the present application can be achieved, which is not limited herein.

[0106] The above detailed description does not constitute a limitation on the scope of protection of the present application. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

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 based on 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 based on the average value of the core hardness; Determine the depth error of the target feature point based on the core hardness curve and the pre-acquired well logging curve, and return the core to be returned based on the depth error of the target feature point; The determining of 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, includes: Determine the position 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 discharge record of the cores to be returned; determine the length of each row of cores to be returned in the core box; determine the hardness measurement points of each row of cores to be returned based on the top and bottom boundaries of the cores to be returned and the preset core hardness measurement spacing.

2. 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: Determine the rock hardness value of the core to be returned at the core hardness measurement point using a hardness measuring device; A core hardness curve is established based on the average value of the core hardness determined at each core hardness measurement point.

3. The method according to claim 2, characterized in that The hardness measurement is performed at the core hardness measurement point using a hardness measuring device, and a core hardness curve is established according to the average value of the core hardness, further comprising: 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 truncated mean method is used to determine the average hardness value of each measuring point of the core to be returned; A core hardness curve is established according to the average hardness value of each measuring point.

4. The method according to claim 1, wherein The determining of the depth error of the target feature point based on the core hardness curve and the pre-acquired logging curve, and homing the core to be relocated based on the depth error of the target feature point, includes: Determine the target characteristic points of the depth curve based on the core hardness curve and the pre-acquired well logging curve; respectively obtaining the depth values ​​of target feature points on the core hardness curve and the previously obtained well logging curve, and determining the depth error of the target feature points according to the depth values ​​of the target feature points; The core to be returned is returned according to the depth error at the target feature point.

5. The method according to claim 4, characterized in that The step of respectively obtaining the depth values ​​of 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 based on 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 based on the pre-acquired well logging curve; A depth error of the target feature point is determined based on the first depth value and the second depth value.

6. 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 a preset core hardness measurement interval, and determine the core hardness measurement point based on 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 establishing module, configured to measure the hardness at the core hardness measuring point using a hardness measuring device, and establish a core hardness curve based on an average value of the core hardness; A core homing module is used to determine the depth error of the target feature point based on the core hardness curve and the pre-acquired logging curve, and to home the core to be homed based on the depth error of the target feature point; The core hardness measurement point determination module is specifically used to: Determine the position 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 discharge record of the cores to be returned; determine the length of each row of cores to be returned in the core box; determine the hardness measurement points of each row of cores to be returned based on the top and bottom boundaries of the cores to be returned and the preset core hardness measurement spacing.

7. 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 positioning method according to any one of claims 1 to 5.

8. A storage medium containing computer-executable instructions, characterized in that: When the computer executable instructions are executed by a computer processor, the computer executable instructions are used to perform the rock hardness-based core locating method according to any one of claims 1 to 5.

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