Continuous mud logging method and device

Abstract

The specification provides a continuous mud logging method and device. The method comprises: obtaining a while-drilling rock sample and a full-diameter core sample, and screening a target rock sample from the while-drilling rock sample; performing a micro-indentation experiment on the target rock sample to obtain static parameters of the target rock sample; performing a triaxial compression experiment on the full-diameter core sample to obtain dynamic parameters and static parameters of the full-diameter core sample; constructing a first corresponding relationship between the static parameters of the target rock sample and the dynamic parameters of the full-diameter core sample; constructing a second corresponding relationship between logging data and the static parameters of the target rock sample according to the first corresponding relationship between the static parameters of the target rock sample and the dynamic parameters of the full-diameter core sample; and drawing a formation mechanical property profile according to the second corresponding relationship. The above method can solve the problem that a complete full-well-section mechanical property profile cannot be continuously drawn in the prior art.

Description

Technical Field

[0001] This manual pertains to the field of logging technology for soil or rock formations, and particularly relates to a continuous logging method and apparatus. Background Technology

[0002] Well logging technology can acquire diverse, timely, and rapid well logging data during oil and gas drilling processes, and is widely used in oil and gas exploration and development operations.

[0003] In well logging technology, cuttings logging based on drilling cuttings is insufficient for obtaining the rock mechanical properties of the target formation. Current techniques typically employ core drilling to obtain full-diameter cores, which are then used for laboratory experiments to determine the rock mechanical properties of the target formation. However, core drilling suffers from poor core column formation, significant core loss, low core recovery rate, and low core alignment rate, making continuous core drilling difficult and consequently preventing the continuous mapping of complete mechanical property profiles for the entire well section.

[0004] There is currently no effective solution to the aforementioned technical problems. Summary of the Invention

[0005] This specification provides a continuous logging method and apparatus that can solve the problem in existing methods that cannot continuously draw complete mechanical property profiles of the entire well section, and realize continuous profile analysis of the entire well section.

[0006] The purpose of the embodiments in this specification is to provide a continuous logging method, including:

[0007] Obtain drilling cuttings samples and full-diameter core samples, and screen out target cuttings from the drilling cuttings samples;

[0008] A micro-indentation experiment was performed on the target rock cuttings to obtain their static parameters; a triaxial compression experiment was performed on the full-diameter core sample to obtain its dynamic and static parameters; a first correspondence was established between the static parameters of the target rock cuttings and the dynamic parameters of the full-diameter core sample.

[0009] Based on the first correspondence between the static parameters of the target rock cuttings and the dynamic parameters of the full-diameter core sample, a second correspondence between the logging data and the static parameters of the target rock cuttings is constructed.

[0010] Based on the second correspondence between well logging data and the static parameters of the target rock cuttings, a formation mechanical property profile is drawn.

[0011] Furthermore, in another embodiment of the method, obtaining drilling cuttings samples includes:

[0012] Drilling cuttings samples are obtained by sampling at equal intervals; and / or by continuous sampling.

[0013] Furthermore, in another embodiment of the method, before screening the target cuttings from the drilling cuttings sample, the method further includes:

[0014] Whole-rock analysis was performed on the drilling cuttings samples to obtain their mineral composition.

[0015] The drilling cuttings sample was subjected to casting thin sections to obtain the microstructural characteristics of the drilling cuttings sample;

[0016] Whole-rock analysis was performed on the full-diameter core sample to obtain the mineral composition of the full-diameter core sample;

[0017] The full-diameter core sample was subjected to casting thin sections to obtain the microstructural characteristics of the full-diameter core sample.

[0018] Furthermore, in another embodiment of the method, the step of screening the target cuttings from the drilling cuttings sample includes:

[0019] The mineral composition of the drilling cuttings sample and the mineral composition of the full-diameter core sample, as well as the microstructural characteristics of the drilling cuttings sample and the microstructural characteristics of the full-diameter core sample, are compared to obtain the comparison results.

[0020] Based on the comparison results, drilling cuttings samples with a mineral composition difference value less than a first preset difference value and a microstructure feature difference value less than a second preset difference value compared to full-diameter core samples are selected as target cuttings.

[0021] Furthermore, in another embodiment of the method, before establishing the first correspondence between the static parameters of the target rock cuttings and the dynamic parameters of the full-diameter core sample, the method further includes:

[0022] The results of the triaxial compression experiment were used to calibrate the results of the micro-indentation experiment in order to determine whether the results of the micro-indentation experiment were reliable.

[0023] Furthermore, in another embodiment of the method, calibrating the micro-indentation experiment results using the results of the triaxial compression experiment to determine whether the micro-indentation experiment results are reliable includes:

[0024] The static parameters of the calibrated target rock cuttings were obtained by processing the results of the micro-indentation experiment using the deconvolution method.

[0025] By comparing the static parameters of the calibrated target rock cuttings with the dynamic parameters of the full-diameter core sample, the results of the micro-indentation experiment are determined to be reliable if the difference between the static parameters of the calibrated target rock cuttings and the dynamic parameters of the full-diameter core sample is less than the third preset difference value.

[0026] Furthermore, in another embodiment of the method, the first correspondence between the static parameters of the target rock cuttings and the dynamic parameters of the full-diameter core sample includes:

[0027] Construct a third correspondence between the static parameters of the target rock cuttings and the static parameters of the full-diameter core sample;

[0028] Construct a fourth correspondence between the static parameters and dynamic parameters of full-diameter core samples;

[0029] Based on the third correspondence between the static parameters of the target rock cuttings and the static parameters of the full-diameter core sample, and the fourth correspondence between the static parameters of the full-diameter core sample and the dynamic parameters of the full-diameter core sample, a first correspondence between the static parameters of the target rock cuttings and the dynamic parameters of the full-diameter core sample is constructed.

[0030] Furthermore, in another embodiment of the method, constructing a second correspondence between well logging data and the static parameters of the target rock cuttings based on a first correspondence between the static parameters of the target rock cuttings and the dynamic parameters of the full-diameter core sample includes:

[0031] Construct the fifth correspondence between dynamic parameters of well logging data and full-diameter core samples;

[0032] Based on the fifth correspondence between well logging data and the dynamic parameters of full-diameter core samples, and the first correspondence between the static parameters of the target rock cuttings and the dynamic parameters of the full-diameter core samples, a second correspondence between well logging data and the static parameters of the target rock cuttings is constructed.

[0033] On the other hand, this application provides a continuous logging apparatus, comprising:

[0034] The screening module is used to acquire drilling cuttings samples and full-diameter core samples, and to screen out target cuttings from the drilling cuttings samples.

[0035] The experimental module is used to perform micro-indentation experiments on the target rock cuttings to obtain the static parameters of the target rock cuttings; to perform triaxial compression experiments on the full-diameter core sample to obtain the dynamic and static parameters of the full-diameter core sample; and to establish a first correspondence between the static parameters of the target rock cuttings and the dynamic parameters of the full-diameter core sample.

[0036] The module is used to construct a second correspondence between well logging data and the static parameters of the target rock cuttings based on a first correspondence between the static parameters of the target rock cuttings and the dynamic parameters of the full-diameter core sample.

[0037] The drawing module is used to draw a profile of formation mechanical properties based on the second correspondence between well logging data and the static parameters of the target rock cuttings.

[0038] In another aspect, this application also provides a computer-readable storage medium storing computer instructions thereon, wherein the computer-readable storage medium implements the above-described continuous logging method when the instructions are executed.

[0039] This specification provides a continuous logging method and apparatus, which involves acquiring drilling cuttings samples and full-diameter core samples, and selecting target cuttings from the drilling cuttings samples; performing micro-indentation experiments on the target cuttings to obtain their static parameters; performing triaxial compression experiments on the full-diameter core samples to obtain their dynamic and static parameters; establishing a first correspondence between the static parameters of the target cuttings and the dynamic parameters of the full-diameter core samples; establishing a second correspondence between logging data and the static parameters of the target cuttings based on the first correspondence; and plotting formation mechanical property profiles based on the second correspondence between the logging data and the static parameters of the target cuttings.

[0040] Furthermore, before selecting target cuttings from the drilling cuttings samples, whole-rock analysis and cast thin sections were performed on both the drilling cuttings samples and the full-diameter core samples to obtain the mineral composition and microstructure characteristics of the drilling cuttings samples and the full-diameter core samples. Then, the mineral composition of the drilling cuttings samples was compared with that of the full-diameter core samples, and the microstructure characteristics of the drilling cuttings samples were compared with those of the full-diameter core samples. Finally, the drilling cuttings samples with properties similar to those of the full-diameter core samples were selected as representative cuttings.

[0041] Furthermore, after conducting micro-indentation experiments on the target rock fragments to obtain their static parameters, and performing triaxial compression experiments on the full-diameter core samples to obtain their dynamic parameters, the results of the micro-indentation experiments are calibrated based on the triaxial compression experiment results. The results of the micro-indentation experiments are then processed using the deconvolution method to obtain the calibrated static parameters of the target rock fragments. The calibrated static parameters of the target rock fragments are compared with the dynamic parameters of the full-diameter core samples. If the difference between the calibrated static parameters of the target rock fragments and the dynamic parameters of the full-diameter core samples is less than a third preset difference value, then the results of the micro-indentation experiments can be considered reliable. Attached Figure Description

[0042] To more clearly illustrate the embodiments of this specification, the accompanying drawings used in the embodiments will be briefly introduced below. The drawings described below are only some embodiments recorded in this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 This is a flowchart illustrating an embodiment of a continuous logging method provided in this specification;

[0044] Figure 2 This is a schematic diagram of a stratigraphic mechanical property profile provided in this specification;

[0045] Figure 3 This is a schematic diagram of the module structure of one embodiment of a continuous logging device provided in this specification. Detailed Implementation

[0046] To enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this specification, and not all embodiments. Based on the embodiments in this specification, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this specification.

[0047] Given the extremely small volume of drilling cuttings, it is difficult to use existing logging techniques to screen out target cuttings that can represent the geological characteristics of the target formation.

[0048] Furthermore, considering that existing cuttings logging technology cannot obtain the rock mechanical properties of the target formation, current techniques typically employ core drilling to obtain full-diameter cores, and then conduct laboratory experiments on these full-diameter cores to obtain the rock mechanical properties of the target formation section. However, during core drilling, there are problems such as poor core column formation, severe core loss, low core recovery rate, and low core alignment rate, making continuous core drilling difficult and consequently preventing the continuous mapping of complete mechanical property profiles for the entire well section.

[0049] In view of the above-mentioned problems of existing methods and the specific reasons for these problems, this application considers introducing a continuous logging method based on the mechanical properties of drilling cuttings to achieve the technical effect of drawing a mechanical property profile of the entire well section.

[0050] Based on the above approach, this specification proposes a continuous logging method. First, drilling cuttings samples and full-diameter core samples are acquired, and target cuttings are selected from the drilling cuttings samples. Then, a micro-indentation experiment is performed on the target cuttings to obtain their static parameters. A triaxial compression experiment is performed on the full-diameter core samples to obtain their dynamic and static parameters. A first correspondence is established between the static parameters of the target cuttings and the dynamic parameters of the full-diameter core samples. Based on this first correspondence, a second correspondence is established between the logging data and the static parameters of the target cuttings. Finally, based on the second correspondence between the logging data and the static parameters of the target cuttings, a formation mechanical property profile is plotted.

[0051] While this specification provides method operation steps or apparatus structures as illustrated in the following embodiments or figures, the methods or apparatus may include more or fewer operation steps or module units, either combined or without inventive effort, based on conventional methods or without inventive effort. In steps or structures where there is no logically necessary causal relationship, the execution order of these steps or the module structure of the apparatus is not limited to the execution order or module structure shown in the embodiments or figures of this specification. When the methods or module structures described in practice are applied to devices, servers, or terminal products, they can be executed sequentially or in parallel according to the methods or module structures shown in the embodiments or figures (e.g., in parallel processor or multi-threaded processing environments, or even distributed processing or server cluster implementation environments).

[0052] See Figure 1 As shown in the embodiments of this specification, a continuous logging method is provided. In specific implementation, this method may include the following:

[0053] S101: Obtain drilling cuttings samples and full-diameter core samples, and screen out target cuttings from the drilling cuttings samples.

[0054] In some embodiments, a full-diameter core refers to a core extracted from an oil and gas reservoir using core sampling techniques, without cutting or splitting, and used as a whole columnar core for laboratory analysis and measurement of relevant parameters.

[0055] In some embodiments, the cuttings samples and full-diameter core samples are obtained from drilling in similar formations. It is necessary to determine the mineral composition and microstructure characteristics of the cuttings samples and full-diameter core samples based on experiments, and select the cuttings samples whose properties are closest to those of the full-diameter core samples as target cuttings.

[0056] In some embodiments, the above-mentioned acquisition of drilling cuttings samples specifically includes: acquiring drilling cuttings samples by sampling at equal intervals; and / or acquiring drilling cuttings samples by continuous sampling.

[0057] In some embodiments, prior to screening the target cuttings from the drilling cuttings sample as described above, the method further includes:

[0058] S1: Perform whole-rock analysis on the drilling cuttings sample to obtain the mineral composition of the drilling cuttings sample;

[0059] S2: Cast thin sections of the drilling cuttings sample to obtain the microstructural features of the drilling cuttings sample;

[0060] S3: Perform whole-rock analysis on the full-diameter core sample to obtain the mineral composition of the full-diameter core sample;

[0061] S4: Cast thin sections of the full-diameter core sample to obtain the microstructural characteristics of the full-diameter core sample.

[0062] In some embodiments, the above-mentioned whole-rock analysis refers to the operation of obtaining the mineral composition of the experimental object using spectroscopic measurement methods.

[0063] In some embodiments, the aforementioned cast thin sheet refers to the operation of injecting colored liquid adhesive into the pore space of the experimental object under vacuum pressure, and after the liquid adhesive has solidified, grinding it to obtain a rock thin sheet, and then observing the rock thin sheet under a microscope to obtain the microstructural characteristics of the experimental object.

[0064] In some embodiments, the above-mentioned screening of target cuttings from the drilling cuttings sample includes, in specific implementation, the following:

[0065] S1: Compare the mineral composition of the drilling cuttings sample with the mineral composition of the full-diameter core sample, as well as the microstructural characteristics of the drilling cuttings sample with the microstructural characteristics of the full-diameter core sample, to obtain the comparison results;

[0066] S2: Based on the comparison results, select drilling cuttings samples from the drilling cuttings samples whose mineral composition difference value is less than the first preset difference value and whose microstructure feature difference value is less than the second preset difference value compared with the full-diameter core sample as target cuttings.

[0067] In some embodiments, both the first preset difference value and the second preset difference value are set based on geological background data and experience.

[0068] S102: Perform a micro-indentation experiment on the target rock cuttings to obtain the static parameters of the target rock cuttings; perform a triaxial compression experiment on the full-diameter core sample to obtain the dynamic and static parameters of the full-diameter core sample; and establish a first correspondence between the static parameters of the target rock cuttings and the dynamic parameters of the full-diameter core sample.

[0069] In some embodiments, the micro-indentation experiment described above refers to the operation of obtaining the static mechanical properties of the test object by measuring the load acting on the indenter and the depth of indentation into the surface of the test object.

[0070] In some embodiments, the above-mentioned triaxial compression test refers to applying pressure to the test object in three spatial coordinate directions, maintaining the pressure throughout the entire experimental process, and then applying vertical axial pressure to the test object through a piston until the sample breaks, so as to obtain the mechanical properties of the test object.

[0071] In some embodiments, the aforementioned static parameters may specifically include: static elastic modulus, static fracture toughness, static Poisson's ratio, and hardness.

[0072] In some embodiments, the aforementioned dynamic parameters may specifically include: dynamic elastic modulus, dynamic fracture toughness, and dynamic Poisson's ratio.

[0073] In some embodiments, the relationship between the static parameters of the target rock cuttings and the dynamic parameters of the full-diameter core sample is constructed as described above. Specifically, the method further includes:

[0074] S1: Construct a third correspondence between the static parameters of the target rock cuttings and the static parameters of the full-diameter core sample;

[0075] S2: Construct the fourth correspondence between the static parameters and dynamic parameters of full-diameter core samples;

[0076] S3: Based on the third correspondence between the static parameters of the target rock cuttings and the static parameters of the full-diameter core sample, and the fourth correspondence between the static parameters of the full-diameter core sample and the dynamic parameters of the full-diameter core sample, construct the first correspondence between the static parameters of the target rock cuttings and the dynamic parameters of the full-diameter core sample.

[0077] In some embodiments, the third correspondence between the static parameters of the target rock cuttings and the static parameters of the full-diameter core sample may specifically include:

[0078] The correspondence between the static elastic modulus of the target rock cuttings and the static elastic modulus of the full-diameter core sample;

[0079] The third static fracture toughness correspondence between the static fracture toughness of the target rock cuttings and the static fracture toughness of the full-diameter core sample;

[0080] The third static Poisson's ratio correspondence between the static Poisson's ratio of the target rock cuttings and the static Poisson's ratio of the full-diameter core sample;

[0081] The third hardness correspondence between the hardness of the target rock fragments and the hardness of the full-diameter core sample.

[0082] In some embodiments, the fourth correspondence between the static parameters of the full-diameter core sample and the dynamic parameters of the full-diameter core sample may specifically include:

[0083] The fourth elastic modulus correspondence between the static elastic modulus and the dynamic elastic modulus of full-diameter core samples;

[0084] The fourth fracture toughness correspondence between the static fracture toughness and the dynamic fracture toughness of full-diameter core samples;

[0085] The fourth Poisson's ratio correspondence between the static Poisson's ratio and the dynamic Poisson's ratio of the full-diameter core sample;

[0086] The fourth hardness-elastic modulus correspondence between the hardness of full-diameter core samples and the dynamic elastic modulus of full-diameter core samples.

[0087] In some embodiments, the first correspondence between the static parameters of the target rock cuttings and the dynamic parameters of the full-diameter core sample may specifically include:

[0088] The first elastic modulus correspondence between the static elastic modulus of the target rock cuttings and the dynamic elastic modulus of the full-diameter core sample;

[0089] The first fracture toughness correspondence between the static fracture toughness of the target rock cuttings and the dynamic fracture toughness of the full-diameter core sample;

[0090] The first Poisson's ratio correspondence between the static Poisson's ratio of the target rock cuttings and the dynamic Poisson's ratio of the full-diameter core sample;

[0091] The first hardness-elastic modulus correspondence between the hardness of the target rock cuttings and the dynamic elastic modulus of the full-diameter core sample.

[0092] In some embodiments, before constructing the relationship between the static parameters of the target rock cuttings and the dynamic parameters of the full-diameter core sample, the method further includes: calibrating the results of the micro-indentation experiment using the results of the triaxial compression experiment to determine whether the results of the micro-indentation experiment are reliable.

[0093] In some embodiments, due to the heterogeneity of the rock, there is a size effect. Therefore, the static mechanical properties of the target rock fragments obtained by the microindentation experiment are not consistent with the dynamic mechanical properties of the full-diameter core sample obtained by the triaxial compression experiment. Therefore, it is necessary to use the results of the triaxial compression experiment to calibrate the results of the microindentation experiment in order to determine whether the results of the microindentation experiment are reliable.

[0094] In some embodiments, the results of the triaxial compression experiment are used to calibrate the results of the micro-indentation experiment to determine whether the results of the micro-indentation experiment are reliable. Specifically, this includes:

[0095] S1: The results of the micro-indentation experiment were processed using the deconvolution method to obtain the calibrated static parameters of the target rock cuttings;

[0096] S2: Compare the static parameters of the calibrated target rock cuttings with the dynamic parameters of the full-diameter core sample. If the difference between the static parameters of the calibrated target rock cuttings and the dynamic parameters of the full-diameter core sample is less than the third preset difference value, the results of the micro-indentation experiment are deemed reliable.

[0097] In some embodiments, the aforementioned third preset difference value is set based on geological background data and experience.

[0098] In some embodiments, if the difference between the static elastic modulus of the calibrated target cuttings and the dynamic elastic modulus of the full-diameter core sample is greater than or equal to a third preset difference value, then the operation of S101 to screen out the target cuttings from the drilling cuttings sample is repeated, and the calibration operation is performed again until the results of the micro-indentation experiment are determined to be reliable.

[0099] S103: Based on the first correspondence between the static parameters of the target rock cuttings and the dynamic parameters of the full-diameter core sample, construct a second correspondence between the logging data and the static parameters of the target rock cuttings.

[0100] In some embodiments, the construction of a second correspondence between well logging data and the static parameters of the target rock cuttings, based on the first correspondence between the static parameters of the target rock cuttings and the dynamic parameters of the full-diameter core sample, specifically includes:

[0101] S1: Construct the fifth correspondence between dynamic parameters of well logging data and full-diameter core samples;

[0102] S2: Based on the fifth correspondence between well logging data and the dynamic parameters of the full-diameter core, and the first correspondence between the static parameters of the target rock cuttings and the dynamic parameters of the full-diameter core, construct a second correspondence between well logging data and the static parameters of the target rock cuttings.

[0103] In some embodiments, the above-mentioned logging data may specifically include: logging acoustic data, logging electrical data, and logging chemical data.

[0104] In some embodiments, the fifth correspondence between the above-mentioned well logging data and the dynamic parameters of the full-diameter core sample may specifically include:

[0105] The fifth acoustic-dynamic correspondence between well logging acoustic data and dynamic parameters of full-diameter core samples;

[0106] The fifth electrical-dynamic correspondence between well logging electrical data and dynamic parameters of full-diameter core samples;

[0107] The fifth chemical-dynamic correspondence between well logging chemical data and dynamic parameters of full-diameter core samples.

[0108] In some embodiments, the second correspondence between the above-mentioned well logging data and the static parameters of the target cuttings may specifically include:

[0109] The second acoustic-static correspondence between well logging acoustic data and the static parameters of the target cuttings;

[0110] The second electrical-static correspondence between well logging electrical data and the static parameters of the target cuttings;

[0111] The second chemical-static correspondence between well logging chemical data and the static parameters of the target cuttings.

[0112] S104: Based on the second correspondence between the well logging data and the static parameters of the target rock cuttings, draw a profile of the formation's mechanical properties.

[0113] Well logging data is characterized by its ease of acquisition, low cost, and continuous data. While static parameters are more difficult to obtain, they are more applicable to various oil and gas extraction projects. Therefore, by establishing a second correspondence between well logging data and the static parameters of target rock cuttings, the characteristics of well logging data and static parameters can be combined to ultimately obtain a continuous profile of formation mechanical properties.

[0114] In a specific scenario example, the continuous logging method provided in this manual can be used to generate a formation mechanical property profile. In practice, drilling cuttings samples can be obtained through equal-interval sampling, for example, sampling at 100-meter intervals; and / or, drilling cuttings samples can be obtained through continuous sampling, for example, sampling continuously for 20 meters within a specific formation. The resulting formation mechanical property profile is as follows: Figure 2 As shown, natural gamma, wellbore, spontaneous potential, resistivity of the invaded zone, formation resistivity, and sonic transit time are all parameters derived from well logging data, while density, elastic modulus, fracture toughness, and hardness are all static parameters.

[0115] Based on the above-described continuous logging method, this specification also provides an embodiment of a continuous logging device, such as... Figure 3 As shown, the continuous logging device specifically includes the following modules:

[0116] The screening module 301 is used to acquire drilling cuttings samples and full-diameter core samples, and to screen out target cuttings from the drilling cuttings samples.

[0117] Experimental module 302 is used to perform a micro-indentation experiment on the target rock cuttings to obtain the static parameters of the target rock cuttings; to perform a triaxial compression experiment on the full-diameter core sample to obtain the dynamic and static parameters of the full-diameter core sample; and to establish a first correspondence between the static parameters of the target rock cuttings and the dynamic parameters of the full-diameter core sample.

[0118] The construction module 303 is used to construct a second correspondence between well logging data and the static parameters of the target rock cuttings based on a first correspondence between the static parameters of the target rock cuttings and the dynamic parameters of the full-diameter core sample.

[0119] The drawing module 304 is used to draw a formation mechanical property profile based on the second correspondence between the well logging data and the static parameters of the target rock cuttings.

[0120] In some embodiments, the screening module 301 can be specifically used to obtain drilling cuttings samples by equal-interval sampling; and / or, obtain drilling cuttings samples by continuous sampling; obtain full-diameter core samples; perform whole-rock analysis on the drilling cuttings samples to obtain the mineral composition of the drilling cuttings samples; perform casting thin sections on the drilling cuttings samples to obtain the microstructural features of the drilling cuttings samples; perform whole-rock analysis on the full-diameter core samples to obtain the mineral composition of the full-diameter core samples; perform casting thin sections on the full-diameter core samples to obtain the microstructural features of the full-diameter core samples; compare the mineral composition of the drilling cuttings samples with the mineral composition of the full-diameter core samples, and the microstructural features of the drilling cuttings samples with the microstructural features of the full-diameter core samples to obtain a comparison result; based on the comparison result, select drilling cuttings samples from the drilling cuttings samples whose difference value in mineral composition with the full-diameter core samples is less than a first preset difference value, and whose difference value in microstructural features is less than a second preset difference value, as target cuttings.

[0121] In some embodiments, the experimental module 302 can be specifically used to perform a micro-indentation experiment on the target rock cuttings to obtain the static parameters of the target rock cuttings; perform a triaxial compression experiment on the full-diameter core sample to obtain the dynamic and static parameters of the full-diameter core sample; process the results of the micro-indentation experiment using the deconvolution method to obtain the calibrated static parameters of the target rock cuttings; compare the calibrated static parameters of the target rock cuttings with the dynamic parameters of the full-diameter core sample, and determine that the difference between the calibrated static parameters of the target rock cuttings and the dynamic parameters of the full-diameter core sample is less than a third preset difference value. Under these circumstances, the reliability of the micro-indentation experiment results is determined; a third correspondence is established between the static parameters of the target rock cuttings and the static parameters of the full-diameter core sample; a fourth correspondence is established between the static parameters of the full-diameter core sample and the dynamic parameters of the full-diameter core sample; based on the third correspondence between the static parameters of the target rock cuttings and the static parameters of the full-diameter core sample, and the fourth correspondence between the static parameters of the full-diameter core sample and the dynamic parameters of the full-diameter core sample, a first correspondence is established between the static parameters of the target rock cuttings and the dynamic parameters of the full-diameter core sample.

[0122] In some embodiments, the above-mentioned construction module 303 can be specifically used to construct a fifth correspondence between the dynamic parameters of well logging data and full-diameter core samples; and based on the fifth correspondence between the dynamic parameters of well logging data and full-diameter core samples, and the first correspondence between the static parameters of the target rock cuttings and the dynamic parameters of the full-diameter core samples, construct a second correspondence between the static parameters of well logging data and the static parameters of the target rock cuttings.

[0123] This specification also provides a computer storage medium for a continuous logging method, the computer storage medium storing computer program instructions, which, when executed, perform the following: acquiring drilling cuttings samples and full-diameter core samples, and screening target cuttings from the drilling cuttings samples; performing micro-indentation experiments on the target cuttings to obtain static parameters of the target cuttings; performing triaxial compression experiments on the full-diameter core samples to obtain dynamic and static parameters of the full-diameter core samples; establishing a first correspondence between the static parameters of the target cuttings and the dynamic parameters of the full-diameter core samples; establishing a second correspondence between logging data and the static parameters of the target cuttings based on the first correspondence between the static parameters of the target cuttings and the dynamic parameters of the full-diameter core samples; and drawing a formation mechanical property profile based on the second correspondence between the logging data and the static parameters of the target cuttings.

[0124] In this embodiment, the storage medium includes, but is not limited to, Random Access Memory (RAM), Read-Only Memory (ROM), cache, hard disk drive (HDD), or memory card. The memory can be used to store computer program instructions. The network communication unit can be an interface configured according to standards specified in the communication protocol for network connection communication.

[0125] In this embodiment, the specific functions and effects implemented by the program instructions stored in the computer storage medium can be explained in comparison with other implementation methods, and will not be repeated here.

[0126] While this specification provides the steps of operation for the methods described in the embodiments or flowcharts, more or fewer steps may be included based on conventional or non-inventive means. The order of steps listed in the embodiments is merely one possible order of execution among many steps and does not represent the only possible order. In actual device or client product execution, the methods shown in the embodiments or drawings may be executed sequentially or in parallel (e.g., in a parallel processor or multi-threaded processing environment, or even a distributed data processing environment). The terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, product, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, product, or apparatus. Without further limitations, the presence of other identical or equivalent elements in a process, method, product, or apparatus that includes said elements is not excluded. The terms "first," "second," etc., are used to denote names and do not indicate any particular order.

[0127] Those skilled in the art will also know that, besides implementing the controller using purely computer-readable program code, the same functions can be achieved by logically programming the method steps, making the controller function as logic gates, switches, application-specific integrated circuits (ASICs), programmable logic controllers (PLCs), and embedded microcontrollers. Therefore, such a controller can be considered a hardware component, and the devices within it used to implement various functions can also be considered structures within that hardware component. Alternatively, the devices used to implement various functions can be considered as both software modules implementing the method and structures within a hardware component.

[0128] This specification can be described in the general context of computer-executable instructions that are executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, classes, etc., that perform a specific task or implement a specific abstract data type. This specification can also be practiced in distributed computing environments, where tasks are performed by remote processing devices connected via a communication network. In distributed computing environments, program modules can reside in local and remote computer storage media, including storage devices.

[0129] As can be seen from the above description of the embodiments, those skilled in the art can clearly understand that this specification can be implemented by means of software plus necessary general-purpose hardware platforms. Based on this understanding, the technical solutions of this specification can essentially be embodied in the form of a software product. This computer software product can be stored in a storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, mobile terminal, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments of this specification.

[0130] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on its differences from other embodiments. This specification can be used in numerous general-purpose or special-purpose computer system environments or configurations. Examples include: personal computers, server computers, handheld or portable devices, tablet devices, multiprocessor systems, microprocessor-based systems, set-top boxes, programmable electronic devices, network PCs, minicomputers, mainframe computers, and distributed computing environments including any of the above systems or devices, etc.

[0131] Although this specification has been described by way of examples, those skilled in the art will recognize that many variations and modifications are possible without departing from the spirit of this specification, and it is intended that the appended claims cover such variations and modifications without departing from the spirit of this specification.

Claims

1. A continuous logging method, characterized in that, include: Obtain drilling cuttings samples and full-diameter core samples, and screen out target cuttings from the drilling cuttings samples; A micro-indentation experiment was performed on the target rock cuttings to obtain their static parameters; a triaxial compression experiment was performed on the full-diameter core sample to obtain its dynamic and static parameters; a first correspondence was established between the static parameters of the target rock cuttings and the dynamic parameters of the full-diameter core sample; wherein, the micro-indentation experiment is an operation to obtain the static mechanical properties of the test object by measuring the load acting on the indenter and the depth of indentation into the surface of the test object; the static parameters include: static elastic modulus, static fracture toughness, static Poisson's ratio, and hardness; the dynamic parameters include: dynamic elastic modulus, dynamic fracture toughness, and dynamic Poisson's ratio; Based on the first correspondence between the static parameters of the target rock cuttings and the dynamic parameters of the full-diameter core sample, a second correspondence between the logging data and the static parameters of the target rock cuttings is constructed. Based on the second correspondence between well logging data and the static parameters of the target rock cuttings, a formation mechanical property profile is drawn; The process of establishing a first correspondence between the static parameters of the target rock cuttings and the dynamic parameters of the full-diameter core sample includes: establishing a third correspondence between the static parameters of the target rock cuttings and the static parameters of the full-diameter core sample; establishing a fourth correspondence between the static parameters of the full-diameter core sample and the dynamic parameters of the full-diameter core sample; and establishing a first correspondence between the static parameters of the target rock cuttings and the dynamic parameters of the full-diameter core sample based on the third correspondence between the static parameters of the target rock cuttings and the static parameters of the full-diameter core sample, and the fourth correspondence between the static parameters of the full-diameter core sample and the dynamic parameters of the full-diameter core sample. Based on the first correspondence between the static parameters of the target rock cuttings and the dynamic parameters of the full-diameter core sample, a second correspondence between the logging data and the static parameters of the target rock cuttings is constructed, including: constructing a fifth correspondence between the logging data and the dynamic parameters of the full-diameter core sample; based on the fifth correspondence between the logging data and the dynamic parameters of the full-diameter core sample, and the first correspondence between the static parameters of the target rock cuttings and the dynamic parameters of the full-diameter core sample, a second correspondence between the logging data and the static parameters of the target rock cuttings is constructed.

2. The method according to claim 1, characterized in that, Obtaining drilling cuttings samples includes: Drilling cuttings samples are obtained by sampling at equal intervals; and / or by continuous sampling.

3. The method according to claim 1, characterized in that, Before selecting the target cuttings from the drilling cuttings sample, the method further includes: Whole-rock analysis was performed on the drilling cuttings samples to obtain their mineral composition. The drilling cuttings sample was subjected to casting thin sections to obtain the microstructural characteristics of the drilling cuttings sample; Whole-rock analysis was performed on the full-diameter core sample to obtain the mineral composition of the full-diameter core sample; The full-diameter core sample was subjected to casting thin sections to obtain the microstructural characteristics of the full-diameter core sample.

4. The method according to claim 3, characterized in that, Target cuttings were selected from the drilling cuttings samples, including: The mineral composition of the drilling cuttings sample and the mineral composition of the full-diameter core sample, as well as the microstructural characteristics of the drilling cuttings sample and the microstructural characteristics of the full-diameter core sample, are compared to obtain the comparison results. Based on the comparison results, drilling cuttings samples with a mineral composition difference value less than a first preset difference value and a microstructure feature difference value less than a second preset difference value compared to full-diameter core samples are selected as target cuttings.

5. The method according to claim 1, characterized in that, Before establishing a first correspondence between the static parameters of the target rock cuttings and the dynamic parameters of the full-diameter core sample, the method further includes: The results of the triaxial compression experiment were used to calibrate the results of the micro-indentation experiment in order to determine whether the results of the micro-indentation experiment were reliable.

6. The method according to claim 5, characterized in that, The results of the micro-indentation experiment are calibrated using the results of the triaxial compression experiment to determine the reliability of the micro-indentation experiment results, including: The static parameters of the calibrated target rock cuttings were obtained by processing the results of the micro-indentation experiment using the deconvolution method. By comparing the static parameters of the calibrated target rock cuttings with the dynamic parameters of the full-diameter core sample, the results of the micro-indentation experiment are determined to be reliable if the difference between the static parameters of the calibrated target rock cuttings and the dynamic parameters of the full-diameter core sample is less than the third preset difference value.

7. A continuous logging device, characterized in that, include: The screening module is used to acquire drilling cuttings samples and full-diameter core samples, and to screen out target cuttings from the drilling cuttings samples. The experimental module is used to perform micro-indentation experiments on the target rock cuttings to obtain their static parameters; to perform triaxial compression experiments on the full-diameter core sample to obtain its dynamic and static parameters; and to establish a first correspondence between the static parameters of the target rock cuttings and the dynamic parameters of the full-diameter core sample. The micro-indentation experiment is an operation that obtains the static mechanical properties of the experimental object by measuring the load acting on the indenter and the depth of indentation into the surface of the experimental object. The static parameters include: static elastic modulus, static fracture toughness, static Poisson's ratio, and hardness; the dynamic parameters include: dynamic elastic modulus, dynamic fracture toughness, and dynamic Poisson's ratio. The module is used to construct a second correspondence between well logging data and the static parameters of the target rock cuttings based on a first correspondence between the static parameters of the target rock cuttings and the dynamic parameters of the full-diameter core sample. The drawing module is used to draw a formation mechanical property profile based on the second correspondence between well logging data and the static parameters of the target rock cuttings; The experimental module is further configured to: construct a third correspondence between the static parameters of the target rock cuttings and the static parameters of the full-diameter core sample; construct a fourth correspondence between the static parameters of the full-diameter core sample and the dynamic parameters of the full-diameter core sample; and construct a first correspondence between the static parameters of the target rock cuttings and the dynamic parameters of the full-diameter core sample based on the third correspondence between the static parameters of the target rock cuttings and the static parameters of the full-diameter core sample, and the fourth correspondence between the static parameters of the full-diameter core sample and the dynamic parameters of the full-diameter core sample. The construction module is specifically used to: construct a fifth correspondence between the dynamic parameters of well logging data and full-diameter core samples; and construct a second correspondence between the static parameters of the target rock cuttings and the static parameters of the target rock cuttings based on the fifth correspondence between the dynamic parameters of the well logging data and full-diameter core samples, and the first correspondence between the static parameters of the target rock cuttings and the dynamic parameters of the full-diameter core samples.

8. A computer-readable storage medium, characterized in that, It stores computer instructions that, when executed by a processor, implement the steps of the method according to any one of claims 1 to 6.

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