An automatic sampling system and method for detecting characteristic pollutants in drilling fluid

Abstract

The present invention relates to the technical field of drilling fluid detection, and discloses an automatic sampling system and method for detecting characteristic pollutants in drilling fluid, the system comprising: a sampling module performs depth spacing and multi-point sampling on the drilling fluid, detects characteristic pollutants and constructs a content change trend graph. A judgment module compares the content of characteristic pollutants at different points at the same horizontal position, determines whether the distribution is uniform, and constructs a trend graph. An adjustment module determines whether secondary vertical sampling is required based on the vertical trend, and determines the range and quantity; at the same time, it determines whether secondary horizontal sampling is required based on the horizontal trend, and determines the corresponding parameters. An analysis module stores characteristic pollutant data and identifies diffusion paths. The present invention achieves accurate drilling fluid sampling and accurate sampling detection results.

Description

Technical Field

[0001] The present invention relates to the technical field of drilling fluid detection, and in particular to an automatic sampling system and method for detecting characteristic pollutants in drilling fluid. Background Art

[0002] In drilling operations, drilling fluid is an important working medium, and its quality directly affects drilling efficiency and safety. Drilling fluid may contain a variety of characteristic pollutants, which not only cause potential harm to the environment, but also may affect the smooth progress of drilling operations. Therefore, it is particularly important to conduct real-time and accurate detection of characteristic pollutants in drilling fluid.

[0003] Existing detection methods mostly rely on manual sampling of drilling fluid at a fixed depth using sampling devices, which has problems such as inaccurate sampling, resulting in inaccurate sampling and detection results.

[0004] Therefore, it is necessary to provide an automatic sampling system and method for detecting characteristic contaminants in drilling fluid to solve the problem of inaccurate sampling in the prior art, thereby causing inaccurate detection of contaminants in the drilling fluid. Summary of the invention

[0005] In view of this, the present invention proposes an automatic sampling system and method for detecting characteristic contaminants in drilling fluid, aiming to solve the problem of inaccurate sampling in the prior art, resulting in inaccurate detection of contaminants in drilling fluid.

[0006] In one aspect, the present invention provides an automatic sampling system for detecting characteristic contaminants in drilling fluid, comprising:

[0007] The sampling module is used to sample the drilling fluid in the well at a fixed depth and at multiple points in the horizontal position at the same depth to obtain drilling fluid samples at several points, detect characteristic pollutants on the drilling fluid samples, and construct trend graphs of the content of each characteristic pollutant in the drilling fluid samples at several points in the same vertical direction;

[0008] A judgment module is used to compare the content of the same characteristic pollutant in the drilling fluid samples at different points at the same horizontal position, and judge whether there is an uneven distribution of characteristic pollutants in the drilling fluid at the depth level according to the comparison result, and respectively construct a change trend diagram of each characteristic pollutant content in the drilling fluid samples at different points at the same horizontal position;

[0009] The adjustment module is used to determine whether to perform secondary vertical sampling according to the change trend of the content of each characteristic pollutant in the drilling fluid samples at several points in the same vertical direction; when the judgment result is to perform secondary vertical sampling, the secondary vertical sampling range and the secondary vertical sampling quantity are determined according to the characteristic data of the fluid and the fluctuation data of the fluid to obtain the secondary vertical drilling fluid sample;

[0010] The adjustment module is also used to determine whether to perform secondary horizontal sampling according to the change trend of the content of each characteristic pollutant in the drilling fluid sample at the same depth; when the judgment result is to perform secondary horizontal sampling, the secondary horizontal sampling range and the secondary horizontal sampling quantity are determined according to the characteristic data of the fluid and the fluctuation data of the fluid to obtain the secondary horizontal drilling fluid sample;

[0011] The analysis module is used to store the characteristic pollutant content data after each drilling fluid sample detection, obtain the characteristic pollutant content change trend at each depth and each same horizontal position, and identify the diffusion path of each characteristic pollutant.

[0012] Furthermore, the sampling module is used to detect characteristic pollutants in the drilling fluid sample, including:

[0013] The drilling fluid samples are pretreated to filter out large solid impurities in the drilling fluid samples, and then the drilling fluid samples are rotated at high speed through a centrifuge. The density difference between different components is used to achieve solid-liquid separation, remove solid impurities in the samples, and obtain the final drilling fluid samples to be tested.

[0014] Furthermore, the adjustment module is used to determine whether to perform secondary vertical sampling according to the change trend of each characteristic pollutant content in the drilling fluid samples at several points in the same vertical direction, including:

[0015] A first standard content change is preset, and if the content change of the same characteristic pollutant in two adjacent drilling fluid samples in the same vertical direction is greater than the preset first standard content change, it is determined to perform secondary vertical sampling;

[0016] If the content change of the same characteristic pollutant in two adjacent drilling fluid samples in the same vertical direction is not greater than the preset first standard content change, it is determined that secondary vertical sampling is not performed.

[0017] Furthermore, when the judgment result is to perform secondary vertical sampling, the judgment module is used to determine the secondary vertical sampling range and the secondary vertical sampling quantity according to the characteristic data of the fluid and the fluctuation data of the fluid, and obtain the secondary vertical drilling fluid sample, including:

[0018] The characteristic data of the fluid include density of the fluid and dynamic viscosity of the fluid, and the fluctuation data of the fluid include wavelength of the fluctuation of the fluid and amplitude of the fluctuation of the fluid;

[0019] The secondary vertical sampling range is calculated by the following formula:

[0020] h=C*(ρ*g) / (A*μ*λ);

[0021] Where h represents the secondary vertical sampling range, C represents a constant, ρ represents the density of the fluid, and g represents the gravitational acceleration, g≈9.81m / s 2 , A represents the amplitude of fluid fluctuation, μ represents the dynamic viscosity of the fluid, and λ represents the wavelength of fluid fluctuation;

[0022] The center position of the secondary vertical sampling range is the same as the center position of the two most recent vertical sampling points.

[0023] Furthermore, the judgment module is used to determine the secondary vertical sampling range and the secondary vertical sampling quantity according to the characteristic data of the fluid and the fluctuation data of the fluid when the judgment result is to perform secondary vertical sampling, and to obtain the secondary vertical drilling fluid sample, and further includes:

[0024] The number of secondary vertical sampling is calculated by the following formula:

[0025] N=(h*μ) / (C d *λ*ρ);

[0026] C d =(d 间距 *μ) / (ρ*λ);

[0027] Where N is the number of secondary vertical sampling, h is the range of secondary vertical sampling, μ is the dynamic viscosity of the fluid, λ is the wavelength of the fluid fluctuation, ρ is the density of the fluid, and C d represents a constant, d 间距 Indicates the spacing of each sampling point within the range of h;

[0028] The sampling points within the secondary vertical sampling range are arranged equidistantly from top to bottom.

[0029] Furthermore, the adjustment module is also used to determine whether to perform secondary horizontal sampling according to the change trend of the content of each characteristic pollutant in the drilling fluid sample at the same depth, including:

[0030] A second standard content change is preset, and if the content change of the same characteristic pollutant in two adjacent drilling fluid samples in the same horizontal direction is greater than the preset second standard content change, it is determined to perform secondary horizontal sampling;

[0031] If the content change of the same characteristic pollutant in two adjacent drilling fluid samples in the same horizontal direction is not greater than the preset second standard content change, it is determined that secondary horizontal sampling is not performed.

[0032] Furthermore, when the judgment result is to perform secondary horizontal sampling, the secondary horizontal sampling range and the secondary horizontal sampling quantity are determined according to the characteristic data of the fluid and the fluctuation data of the fluid, and the secondary horizontal drilling fluid sample is obtained, including:

[0033] The wave data of the fluid also includes the speed of wave propagation in the fluid, the degree of weakening of the impact of the wave due to energy attenuation during the propagation process, the attenuation coefficient of the wave and the vertical distance between the sampling point and the wave source;

[0034] The secondary horizontal sampling range is calculated by the following formula:

[0035] Ls=k*[(λ*A*c) / (μ*ρ)]*e -αhj ;

[0036] Where Ls represents the range of secondary horizontal sampling, k represents a constant, λ represents the wavelength of the fluid fluctuation, A represents the amplitude of the fluid fluctuation, c represents the speed at which the fluctuation propagates in the fluid, μ represents the dynamic viscosity of the fluid, ρ represents the density of the fluid, and e represents the wavelength of the fluid fluctuation. -αhj It indicates the degree of weakening of the influence of the wave due to energy attenuation during the propagation process, α indicates the attenuation coefficient of the wave, and hj indicates the vertical distance between the sampling point and the wave source;

[0037] The center position of the range of the secondary horizontal sampling is the same as the center position of the two most recent horizontal sampling points.

[0038] Furthermore, when the judgment result is to perform secondary horizontal sampling, the secondary horizontal sampling range and the secondary horizontal sampling quantity are determined according to the characteristic data of the fluid and the fluctuation data of the fluid, and when the secondary horizontal drilling fluid sample is obtained, it also includes:

[0039] Fluid fluctuation data also includes the fluid fluctuation frequency;

[0040] The secondary horizontal sampling quantity is calculated by the following formula:

[0041] Ns = (Ls*f*μ) / (ρ*dmin);

[0042] dmin = c / (2*f);

[0043] Among them, Ns represents the number of secondary level sampling, Ls represents the range of secondary level sampling, f represents the fluctuation frequency of the fluid, μ represents the dynamic viscosity of the fluid, ρ represents the density of the fluid, and dmin represents the minimum sampling interval;

[0044] The sampling points within the range of the secondary horizontal sampling are equidistantly arranged in the horizontal direction.

[0045] Furthermore, the analysis module is used to store the characteristic pollutant content data after each drilling fluid sample detection, obtain the characteristic pollutant content change trend at each depth and each same horizontal position, and identify the diffusion path of each characteristic pollutant, including:

[0046] Based on the concentration data of each characteristic pollutant at each depth and at the same horizontal position, draw a contour map of each characteristic pollutant concentration to show the spatial distribution of each characteristic pollutant at different positions;

[0047] Use heat maps to display the high and low distribution of each characteristic pollutant concentration, and intuitively identify the concentration area and diffusion trend of each characteristic pollutant;

[0048] Analyze the pollutant concentration at the same location over time, identify the trend of increasing or decreasing concentration, and determine whether the pollutants are spreading in a certain direction.

[0049] Compared with the prior art, the present invention has the following beneficial effects:

[0050] The sampling module ensures comprehensive coverage of drilling fluid samples through depth-determined spacing and multi-point sampling, thereby more accurately reflecting the distribution of pollutants in the drilling fluid; the judgment module promptly discovers the problem of uneven distribution of pollutants by comparing the pollutant content at different points at the same horizontal position, providing a strong basis for subsequent sampling and adjustment; the adjustment module decides whether secondary sampling is needed based on the changing trend of pollutant content, and accurately determines the sampling range and quantity, thereby improving the efficiency and accuracy of sampling; finally, the analysis module can clearly identify the diffusion path of pollutants by storing and analyzing detection data.

[0051] On the other hand, the present application also provides an automatic sampling method for detecting characteristic contaminants in drilling fluid, comprising:

[0052] S100: sampling the drilling fluid in the well at a fixed depth, and performing multi-point sampling at the same depth horizontal position to obtain drilling fluid samples at several points, detecting characteristic pollutants in the drilling fluid samples, and constructing trend graphs of the content changes of each characteristic pollutant in the drilling fluid samples at several points in the same vertical direction;

[0053] S200: comparing the content of the same characteristic pollutant in the drilling fluid samples at different points at the same horizontal position, judging whether the characteristic pollutants are unevenly distributed on the horizontal plane of the depth of the drilling fluid according to the comparison result, and constructing the content change trend diagrams of each characteristic pollutant in the drilling fluid samples at different points at the same horizontal position;

[0054] S300: judging whether to perform secondary vertical sampling according to the changing trend of the content of each characteristic pollutant in the drilling fluid samples at several points in the same vertical direction; when the judgment result is to perform secondary vertical sampling, determining the secondary vertical sampling range and the secondary vertical sampling quantity according to the characteristic data of the fluid and the fluctuation data of the fluid, and obtaining the secondary vertical drilling fluid sample;

[0055] S400: judging whether to perform secondary horizontal sampling according to the content variation trend of each characteristic pollutant in the drilling fluid sample at the same depth; when the judgment result is to perform secondary horizontal sampling, determining the secondary horizontal sampling range and the secondary horizontal sampling quantity according to the characteristic data of the fluid and the fluctuation data of the fluid, and obtaining the secondary horizontal drilling fluid sample;

[0056] S500: storing the characteristic pollutant content data after each drilling fluid sample test, obtaining the characteristic pollutant content variation trend at each depth and each same horizontal position, and identifying the diffusion path of each characteristic pollutant.

[0057] It is understandable that the automatic sampling system and method for detecting characteristic contaminants in drilling fluid provided in the present application have the same beneficial effects, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0059] Figure 1 A functional block diagram of an automatic sampling system for detecting characteristic contaminants in drilling fluids provided by an embodiment of the present invention;

[0060] Figure 2 A flow chart of an automatic sampling method for detecting characteristic contaminants in drilling fluid provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0061] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features described in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0062] In some embodiments of the present application, see Figure 1 As shown, this embodiment provides an automatic sampling system for detecting characteristic contaminants in drilling fluid, comprising:

[0063] The sampling module is used to sample the drilling fluid in the well at a fixed depth and at multiple points in the horizontal position at the same depth to obtain drilling fluid samples at several points, detect characteristic pollutants in the drilling fluid samples, and construct trend graphs of the content changes of each characteristic pollutant in the drilling fluid samples at several points in the same vertical direction;

[0064] A judgment module is used to compare the content of the same characteristic pollutant in the drilling fluid samples at different points at the same horizontal position, and judge whether there is an uneven distribution of characteristic pollutants in the drilling fluid at the depth level according to the comparison result, and respectively construct the trend diagrams of the content changes of each characteristic pollutant in the drilling fluid samples at different points at the same horizontal position;

[0065] The adjustment module is used to determine whether to perform secondary vertical sampling according to the change trend of the content of each characteristic pollutant in the drilling fluid samples at several points in the same vertical direction; when the judgment result is to perform secondary vertical sampling, the secondary vertical sampling range and the secondary vertical sampling quantity are determined according to the characteristic data of the fluid and the fluctuation data of the fluid to obtain the secondary vertical drilling fluid sample;

[0066] The adjustment module is also used to determine whether to perform secondary horizontal sampling according to the changing trend of the content of each characteristic pollutant in the drilling fluid sample at the same depth; when the judgment result is to perform secondary horizontal sampling, the secondary horizontal sampling range and the secondary horizontal sampling quantity are determined according to the characteristic data of the fluid and the fluctuation data of the fluid to obtain the secondary horizontal drilling fluid sample;

[0067] The analysis module is used to store the characteristic pollutant content data after each drilling fluid sample test, obtain the characteristic pollutant content change trend at each depth and at the same horizontal position, and identify the diffusion path of each characteristic pollutant.

[0068] It is understandable that the sampling module ensures comprehensive coverage of drilling fluid samples by depth spacing and multi-point sampling, so that the distribution of pollutants in the drilling fluid can be more accurately reflected; the judgment module timely discovers the problem of uneven distribution of pollutants by comparing the pollutant content at different points at the same horizontal position, providing a strong basis for subsequent sampling and adjustment; the adjustment module determines whether secondary sampling is needed according to the changing trend of the pollutant content, and accurately determines the sampling range and quantity, thereby improving the efficiency and accuracy of sampling; finally, the analysis module can clearly identify the diffusion path of pollutants by storing and analyzing the detection data. Preferably, the characteristic pollutants include benzo(a)pyrene, CODcr and oil content.

[0069] In some embodiments of the present application, the sampling module is used to detect characteristic contaminants in the drilling fluid sample, including:

[0070] The drilling fluid samples are pretreated to filter out large solid impurities in the drilling fluid samples, and then the drilling fluid samples are rotated at high speed through a centrifuge. The density difference between different components is used to achieve solid-liquid separation, remove solid impurities in the samples, and obtain the final drilling fluid samples to be tested.

[0071] It can be understood that the sampling module not only filters out large solid impurities in the sample, but also achieves efficient solid-liquid separation through the high-speed rotation of the centrifuge and the density difference between different components, further removing solid impurities in the sample and ensuring the purity of the final drilling fluid sample to be tested, providing a more accurate and reliable sample basis for subsequent characteristic pollutant detection, thereby improving the accuracy and effectiveness of the test results.

[0072] In some embodiments of the present application, the adjustment module is used to determine whether to perform secondary vertical sampling according to the change trend of each characteristic pollutant content in the drilling fluid samples at several points in the same vertical direction, including:

[0073] A first standard content change is preset, and if the content change of the same characteristic pollutant in two adjacent drilling fluid samples in the same vertical direction is greater than the preset first standard content change, it is determined to perform secondary vertical sampling;

[0074] If the content change of the same characteristic pollutant in two adjacent drilling fluid samples in the same vertical direction is not greater than the preset first standard content change, it is determined that secondary vertical sampling is not required.

[0075] Specifically, as long as the content of one characteristic pollutant is greater than the change in the first standard content, it is determined to conduct secondary vertical sampling.

[0076] In some embodiments of the present application, when the judgment result is to perform secondary vertical sampling, the judgment module is used to determine the secondary vertical sampling range and the secondary vertical sampling quantity according to the characteristic data of the fluid and the fluctuation data of the fluid, and obtain the secondary vertical drilling fluid sample, including:

[0077] The characteristic data of the fluid include the density of the fluid and the dynamic viscosity of the fluid, and the fluctuation data of the fluid include the wavelength of the fluid fluctuation and the amplitude of the fluid fluctuation;

[0078] The secondary vertical sampling range is calculated by the following formula:

[0079] h=C*(ρ*g) / (A*μ*λ);

[0080] Where h represents the secondary vertical sampling range, C represents a constant, ρ represents the density of the fluid, and g represents the gravitational acceleration, g≈9.81m / s 2 , A represents the amplitude of fluid fluctuation, μ represents the dynamic viscosity of the fluid, and λ represents the wavelength of fluid fluctuation;

[0081] The center position of the secondary vertical sampling range is the same as the center position of the two most recent vertical sampling points.

[0082] It can be understood that in the above formula, C is obtained by experimental determination. First, through a series of experiments, the sampling range of different fluids under specific fluctuation conditions can be determined under controlled conditions. Then, the experimental data is compared with the sample analysis results in actual drilling operations to determine an empirical constant C, which can reflect the sampling efficiency of a specific fluid under specific fluctuation conditions.

[0083] In some embodiments of the present application, when the judgment result is to perform secondary vertical sampling, the judgment module is used to determine the secondary vertical sampling range and the secondary vertical sampling quantity according to the characteristic data of the fluid and the fluctuation data of the fluid, and obtain the secondary vertical drilling fluid sample, and further includes:

[0084] The number of secondary vertical sampling is calculated by the following formula:

[0085] N=(h*μ) / (C d *λ*ρ);

[0086] C d =(d 间距 *μ) / (ρ*λ);

[0087] Where N is the number of secondary vertical sampling, h is the range of secondary vertical sampling, μ is the dynamic viscosity of the fluid, λ is the wavelength of the fluid fluctuation, ρ is the density of the fluid, and C d represents a constant, d 间距 Indicates the spacing of each sampling point within the range of h;

[0088] Each sampling point within the secondary vertical sampling range is set equidistantly from top to bottom.

[0089] It is understandable that the adjustment module monitors the changes in the content of characteristic pollutants in the drilling fluid in the same vertical direction, and uses the preset standard changes to accurately determine whether secondary vertical sampling is needed, which greatly improves the pertinence and efficiency of sampling; further, after confirming the necessity of secondary sampling, the judgment module derives a reasonable secondary sampling range and quantity based on key characteristics such as fluid density, dynamic viscosity, and fluctuation data to ensure the comprehensiveness and representativeness of the sample; it not only improves the accuracy of data collection, but also provides a solid data foundation for subsequent geological analysis and engineering decisions. In general, the design and implementation of the adjustment module improves the efficiency, accuracy, and reliability of drilling fluid analysis.

[0090] In some embodiments of the present application, the adjustment module is further used to determine whether to perform secondary horizontal sampling according to the change trend of the content of each characteristic pollutant in the drilling fluid sample at the same depth, including:

[0091] A second standard content change is preset. If the content change of the same characteristic pollutant in two adjacent drilling fluid samples in the same horizontal direction is greater than the preset second standard content change, it is determined that secondary horizontal sampling is to be performed;

[0092] If the content change of the same characteristic pollutant in two adjacent drilling fluid samples in the same horizontal direction is not greater than the preset second standard content change, it is determined that secondary horizontal sampling is not performed.

[0093] In some embodiments of the present application, when the judgment result is to perform secondary horizontal sampling, the secondary horizontal sampling range and the secondary horizontal sampling quantity are determined according to the characteristic data of the fluid and the fluctuation data of the fluid, and the secondary horizontal drilling fluid sample is obtained, including:

[0094] Fluid wave data also include the speed of wave propagation in the fluid, the degree of weakening of the wave's influence due to energy attenuation during the wave's propagation, the wave's attenuation coefficient, and the vertical distance between the sampling point and the wave source;

[0095] The secondary horizontal sampling range is calculated by the following formula:

[0096] Ls=k*[(λ*A*c) / (μ*ρ)]*e -αhj ;

[0097] Where Ls represents the range of secondary horizontal sampling, k represents a constant, λ represents the wavelength of the fluid fluctuation, A represents the amplitude of the fluid fluctuation, c represents the speed at which the fluctuation propagates in the fluid, μ represents the dynamic viscosity of the fluid, ρ represents the density of the fluid, and e represents the wavelength of the fluid fluctuation. -αhj It indicates the degree of weakening of the influence of the wave due to energy attenuation during the propagation process, α indicates the attenuation coefficient of the wave, and hj indicates the vertical distance between the sampling point and the wave source;

[0098] The center position of the range of the secondary horizontal sampling is the same as the center position of the two most recent horizontal sampling points.

[0099] In some embodiments of the present application, when the judgment result is to perform secondary horizontal sampling, the secondary horizontal sampling range and the secondary horizontal sampling quantity are determined according to the characteristic data of the fluid and the fluctuation data of the fluid, and the secondary horizontal drilling fluid sample is obtained, and the following is also included:

[0100] Fluid fluctuation data also includes the fluid fluctuation frequency;

[0101] The number of secondary level samples is calculated by the following formula:

[0102] Ns = (Ls*f*μ) / (ρ*dmin);

[0103] dmin = c / (2*f);

[0104] Among them, Ns represents the number of secondary level sampling, Ls represents the range of secondary level sampling, f represents the fluctuation frequency of the fluid, μ represents the dynamic viscosity of the fluid, ρ represents the density of the fluid, and dmin represents the minimum sampling interval;

[0105] The sampling points within the range of the secondary horizontal sampling are set equidistantly in the horizontal direction.

[0106] It is understandable that through dynamic monitoring of changes in characteristic pollutant content, when it is detected that the change in the content of the same pollutant in adjacent samples exceeds the preset threshold, secondary horizontal sampling is automatically triggered, which not only ensures the targeted sampling, but also avoids unnecessary waste of resources; at the same time, the scope and quantity of secondary sampling are scientifically calculated using fluid fluctuation data (such as fluctuation velocity, attenuation coefficient, etc.), ensuring accurate coverage of the sampling range and uniform distribution of sampling points, which not only improves the accuracy of drilling fluid pollution detection, but also provides reliable data support for subsequent pollution treatment and prevention, reflecting the practical application value of scientific and technological innovation in the field of environmental protection.

[0107] In some embodiments of the present application, the analysis module is used to store the characteristic pollutant content data after each drilling fluid sample detection, obtain the characteristic pollutant content change trend at each depth and each same horizontal position, and identify the diffusion path of each characteristic pollutant, including:

[0108] Based on the concentration data of each characteristic pollutant at each depth and at the same horizontal position, draw a contour map of each characteristic pollutant concentration to show the spatial distribution of each characteristic pollutant at different positions;

[0109] Use heat maps to display the high and low distribution of each characteristic pollutant concentration, and intuitively identify the concentration area and diffusion trend of each characteristic pollutant;

[0110] Analyze the pollutant concentration at the same location over time, identify the trend of increasing or decreasing concentration, and determine whether the pollutants are spreading in a certain direction.

[0111] It is understandable that the analysis module can not only accurately store the characteristic pollutant content data after each drilling fluid sample test, but also reveal the changing trend of characteristic pollutant content at each depth and at the same horizontal position by deeply mining these data. By drawing contour maps of characteristic pollutant concentrations, the module intuitively displays the spatial distribution of characteristic pollutants at different locations. At the same time, the heat map can easily identify the concentrated areas and diffusion trends of pollutants, analyze the pollutant concentrations that change over time at the same location, and accurately determine whether pollutants are spreading in a certain direction, providing strong data support for pollution prevention and control.

[0112] In summary, the sampling module ensures comprehensive coverage of drilling fluid samples through depth-determined spacing and multi-point sampling, thereby being able to more accurately reflect the distribution of pollutants in the drilling fluid; the judgment module promptly discovers the problem of uneven distribution of pollutants by comparing the pollutant content at different points at the same horizontal position, providing a strong basis for subsequent sampling and adjustment; the adjustment module decides whether secondary sampling is needed based on the changing trend of the pollutant content, and accurately determines the sampling range and quantity, thereby improving the efficiency and accuracy of sampling; finally, the analysis module can clearly identify the diffusion path of pollutants by storing and analyzing detection data.

[0113] On the other hand, see Figure 2 As shown, the present application also provides an automatic sampling method for detecting characteristic contaminants in drilling fluid, the method comprising:

[0114] S100: sampling the drilling fluid in the well at a fixed depth, and performing multi-point sampling at the same depth horizontal position to obtain drilling fluid samples at several points, detecting characteristic pollutants in the drilling fluid samples, and constructing trend graphs of the content changes of each characteristic pollutant in the drilling fluid samples at several points in the same vertical direction;

[0115] S200: comparing the content of the same characteristic pollutant in the drilling fluid samples at different points at the same horizontal position, judging whether the characteristic pollutants are unevenly distributed on the horizontal plane of the depth of the drilling fluid according to the comparison result, and constructing the content change trend diagrams of each characteristic pollutant in the drilling fluid samples at different points at the same horizontal position;

[0116] S300: judging whether to perform secondary vertical sampling according to the changing trend of the content of each characteristic pollutant in the drilling fluid samples at several points in the same vertical direction; when the judgment result is to perform secondary vertical sampling, determining the secondary vertical sampling range and the secondary vertical sampling quantity according to the characteristic data of the fluid and the fluctuation data of the fluid, and obtaining the secondary vertical drilling fluid sample;

[0117] S400: judging whether to perform secondary horizontal sampling according to the content variation trend of each characteristic pollutant in the drilling fluid sample at the same depth; when the judgment result is to perform secondary horizontal sampling, determining the secondary horizontal sampling range and the secondary horizontal sampling quantity according to the characteristic data of the fluid and the fluctuation data of the fluid, and obtaining the secondary horizontal drilling fluid sample;

[0118] S500: storing the characteristic pollutant content data after each drilling fluid sample test, obtaining the characteristic pollutant content variation trend at each depth and each same horizontal position, and identifying the diffusion path of each characteristic pollutant.

[0119] The automatic sampling method for detecting characteristic pollutants in drilling fluid provided in this application comprehensively and accurately captures the distribution of characteristic pollutants in drilling fluid by means of depth spacing and multi-point sampling. The change trend graphs constructed in the vertical direction and horizontal position respectively not only intuitively show the changes in the content of pollutants, but also facilitate the judgment of whether their distribution is uniform. In addition, the secondary sampling strategy based on fluid characteristics and fluctuation data further improves the pertinence and accuracy of sampling. Finally, by storing and analyzing the data of each detection, the diffusion path of characteristic pollutants can be clearly identified, providing a strong guarantee for the safety and environmental protection of drilling operations.

[0120] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0121] The present application is described with reference to flowcharts and / or block diagrams of methods, devices (systems) and computer program products according to embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0122] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0123] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0124] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. An automatic sampling system for detecting characteristic contaminants in drilling fluids, characterized in that: include: The sampling module is used to sample the drilling fluid in the well at a fixed depth and at multiple points in the horizontal position at the same depth to obtain drilling fluid samples at several points, detect characteristic pollutants on the drilling fluid samples, and construct trend graphs of the content of each characteristic pollutant in the drilling fluid samples at several points in the same vertical direction; A judgment module is used to compare the content of the same characteristic pollutant in the drilling fluid samples at different points at the same horizontal position, and judge whether there is an uneven distribution of characteristic pollutants in the drilling fluid at the depth level according to the comparison result, and respectively construct a change trend diagram of each characteristic pollutant content in the drilling fluid samples at different points at the same horizontal position; The adjustment module is used to determine whether to perform secondary vertical sampling according to the change trend of the content of each characteristic pollutant in the drilling fluid samples at several points in the same vertical direction; when the judgment result is to perform secondary vertical sampling, the secondary vertical sampling range and the secondary vertical sampling quantity are determined according to the characteristic data of the fluid and the fluctuation data of the fluid to obtain the secondary vertical drilling fluid sample; The characteristic data of the fluid include density of the fluid and dynamic viscosity of the fluid, and the fluctuation data of the fluid include wavelength of the fluctuation of the fluid and amplitude of the fluctuation of the fluid; The secondary vertical sampling range is calculated by the following formula: h=C*(ρ*g) / (A*μ*λ); Where h represents the secondary vertical sampling range, C represents a constant, ρ represents the density of the fluid, and g represents the gravitational acceleration, g≈9.81m / s 2 , A represents the amplitude of fluid fluctuation, μ represents the dynamic viscosity of the fluid, and λ represents the wavelength of fluid fluctuation; The center position of the secondary vertical sampling range is the same as the center position of the two most recent vertical sampling points; The number of secondary vertical sampling is calculated by the following formula: N=(h*μ) / (C d *l*r); C d =(d 间距 *μ) / (ρ*λ); Where N is the number of secondary vertical sampling, h is the range of secondary vertical sampling, μ is the dynamic viscosity of the fluid, λ is the wavelength of the fluid fluctuation, ρ is the density of the fluid, and C d represents a constant, d 间距 Indicates the spacing of each sampling point within the range of h; Each sampling point within the secondary vertical sampling range is equidistantly arranged from top to bottom; The adjustment module is also used to determine whether to perform secondary horizontal sampling according to the change trend of the content of each characteristic pollutant in the drilling fluid sample at the same depth; when the judgment result is to perform secondary horizontal sampling, the secondary horizontal sampling range and the secondary horizontal sampling quantity are determined according to the characteristic data of the fluid and the fluctuation data of the fluid to obtain the secondary horizontal drilling fluid sample; The analysis module is used to store the characteristic pollutant content data after each drilling fluid sample detection, obtain the characteristic pollutant content change trend at each depth and each same horizontal position, and identify the diffusion path of each characteristic pollutant.

2. The automatic sampling system for detecting characteristic contaminants in drilling fluid according to claim 1, characterized in that: The sampling module is used to detect characteristic pollutants in the drilling fluid sample, and includes: The drilling fluid samples are pretreated to filter out large solid impurities in the drilling fluid samples, and then the drilling fluid samples are rotated at high speed through a centrifuge. The density difference between different components is used to achieve solid-liquid separation, remove solid impurities in the samples, and obtain the final drilling fluid samples to be tested.

3. The automatic sampling system for detecting characteristic contaminants in drilling fluid according to claim 2, characterized in that: The adjustment module is used to determine whether to perform secondary vertical sampling according to the change trend of the content of each characteristic pollutant in the drilling fluid samples at several points in the same vertical direction, including: A first standard content change is preset, and if the content change of the same characteristic pollutant in two adjacent drilling fluid samples in the same vertical direction is greater than the preset first standard content change, it is determined to perform secondary vertical sampling; If the content change of the same characteristic pollutant in two adjacent drilling fluid samples in the same vertical direction is not greater than the preset first standard content change, it is determined that secondary vertical sampling is not performed.

4. The automatic sampling system for detecting characteristic contaminants in drilling fluid according to claim 3, characterized in that: The adjustment module is also used to determine whether to perform secondary horizontal sampling according to the change trend of the content of each characteristic pollutant in the drilling fluid sample at the same depth, including: A second standard content change is preset, and if the content change of the same characteristic pollutant in two adjacent drilling fluid samples in the same horizontal direction is greater than the preset second standard content change, it is determined to perform secondary horizontal sampling; If the content change of the same characteristic pollutant in two adjacent drilling fluid samples in the same horizontal direction is not greater than the preset second standard content change, it is determined that secondary horizontal sampling is not performed.

5. The automatic sampling system for detecting characteristic contaminants in drilling fluid according to claim 4, characterized in that: When the judgment result is to perform secondary horizontal sampling, the secondary horizontal sampling range and the secondary horizontal sampling quantity are determined according to the characteristic data of the fluid and the fluctuation data of the fluid, and the secondary horizontal drilling fluid sample is obtained, including: The wave data of the fluid also includes the speed of wave propagation in the fluid, the degree of weakening of the impact of the wave due to energy attenuation during the propagation process, the attenuation coefficient of the wave and the vertical distance between the sampling point and the wave source; The secondary horizontal sampling range is calculated by the following formula: Ls=k*[(λ*A*c) / (μ*ρ)]*e -αhj ; Where Ls represents the range of secondary horizontal sampling, k represents a constant, λ represents the wavelength of the fluid fluctuation, A represents the amplitude of the fluid fluctuation, c represents the speed at which the fluctuation propagates in the fluid, μ represents the dynamic viscosity of the fluid, ρ represents the density of the fluid, and e represents the wavelength of the fluid fluctuation. -αhj It indicates the degree of weakening of the influence of the wave due to energy attenuation during the propagation process, α indicates the attenuation coefficient of the wave, and hj indicates the vertical distance between the sampling point and the wave source; The center position of the range of the secondary horizontal sampling is the same as the center position of the two most recent horizontal sampling points.

6. The automatic sampling system for detecting characteristic contaminants in drilling fluid according to claim 5, characterized in that: When the judgment result is to perform secondary horizontal sampling, the secondary horizontal sampling range and the secondary horizontal sampling quantity are determined according to the characteristic data of the fluid and the fluctuation data of the fluid, and the secondary horizontal drilling fluid sample is obtained, and the method further includes: Fluid fluctuation data also includes the fluid fluctuation frequency; The secondary horizontal sampling quantity is calculated by the following formula: Ns = (Ls*f*μ) / (ρ*dmin); dmin = c / (2*f); Among them, Ns represents the number of secondary level sampling, Ls represents the range of secondary level sampling, f represents the fluctuation frequency of the fluid, μ represents the dynamic viscosity of the fluid, ρ represents the density of the fluid, and dmin represents the minimum sampling interval; The sampling points within the scope of the secondary horizontal sampling are arranged equidistantly in the horizontal direction.

7. The automatic sampling system for detecting characteristic contaminants in drilling fluid according to claim 6, characterized in that: The analysis module is used to store the characteristic pollutant content data after each drilling fluid sample detection, obtain the characteristic pollutant content change trend at each depth and each same horizontal position, and identify the diffusion path of each characteristic pollutant, including: Based on the concentration data of each characteristic pollutant at each depth and at the same horizontal position, draw a contour map of each characteristic pollutant concentration to show the spatial distribution of each characteristic pollutant at different positions; Use heat maps to display the high and low distribution of each characteristic pollutant concentration, and intuitively identify the concentration area and diffusion trend of each characteristic pollutant; Analyze the pollutant concentration at the same location over time, identify the trend of increasing or decreasing concentration, and determine whether the pollutants are spreading in a certain direction.

8. An automatic sampling method for detecting characteristic contaminants in drilling fluid, applied to the automatic sampling system for detecting characteristic contaminants in drilling fluid as claimed in any one of claims 1 to 7, characterized in that: include: The drilling fluid in the well is sampled at a fixed depth, and multiple sampling is performed at the same depth in the horizontal position to obtain drilling fluid samples at several points, and characteristic pollutant detection is performed on the drilling fluid samples to construct the content change trend diagrams of each characteristic pollutant in the drilling fluid samples at several points in the same vertical direction; Compare the content of the same characteristic pollutant in the drilling fluid samples at different points at the same horizontal position, determine whether the characteristic pollutants are unevenly distributed on the horizontal plane of the depth of the drilling fluid according to the comparison results, and construct the trend graphs of the content changes of each characteristic pollutant in the drilling fluid samples at different points at the same horizontal position; According to the changing trend of the content of each characteristic pollutant in the drilling fluid samples at several points in the same vertical direction, it is judged whether to conduct secondary vertical sampling; when the judgment result is to conduct secondary vertical sampling, the secondary vertical sampling range and the secondary vertical sampling quantity are determined according to the characteristic data of the fluid and the fluctuation data of the fluid, and the secondary vertical drilling fluid samples are obtained; The characteristic data of the fluid include density of the fluid and dynamic viscosity of the fluid, and the fluctuation data of the fluid include wavelength of the fluctuation of the fluid and amplitude of the fluctuation of the fluid; The secondary vertical sampling range is calculated by the following formula: h=C*(ρ*g) / (A*μ*λ); Where h represents the secondary vertical sampling range, C represents a constant, ρ represents the density of the fluid, and g represents the gravitational acceleration, g≈9.81m / s 2 , A represents the amplitude of fluid fluctuation, μ represents the dynamic viscosity of the fluid, and λ represents the wavelength of fluid fluctuation; The center position of the secondary vertical sampling range is the same as the center position of the two most recent vertical sampling points; The number of secondary vertical sampling is calculated by the following formula: N=(h*μ) / (C d *l*r); C d =(d 间距 *μ) / (ρ*λ); Where N is the number of secondary vertical sampling, h is the range of secondary vertical sampling, μ is the dynamic viscosity of the fluid, λ is the wavelength of the fluid fluctuation, ρ is the density of the fluid, and C d represents a constant, d 间距 Indicates the spacing of each sampling point within the range of h; Each sampling point within the secondary vertical sampling range is equidistantly arranged from top to bottom; According to the changing trend of the content of each characteristic pollutant in the drilling fluid sample at the same depth, it is judged whether to perform secondary horizontal sampling; when the judgment result is to perform secondary horizontal sampling, the secondary horizontal sampling range and the secondary horizontal sampling quantity are determined according to the characteristic data of the fluid and the fluctuation data of the fluid, and the secondary horizontal drilling fluid sample is obtained; The characteristic pollutant content data after each drilling fluid sample test is stored to obtain the characteristic pollutant content change trend at each depth and at the same horizontal position, and identify the diffusion path of each characteristic pollutant.

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