A kind of oil layer sampling device and sampling method for oil production samples

Abstract

The invention discloses a petroleum production sample oil layer sampling device and a sampling method, which specifically relate to the technical field of petroleum sampling, and include a sampling barrel, an electromagnetic valve, and a remote control system. The sampling barrel is connected to a first pipeline, a second pipeline, and a third pipeline, and a flow rate sensor is arranged at the connection point. The sampling barrel includes an air outlet and a gravity sensor; the electromagnetic valve is used to control the opening and closing of the pipeline; the first pipeline is used to extract oil from an oil exploration well and send the oil into the sampling barrel; the second pipeline is used to extract oil samples from the sampling barrel and transmit them to an oil analysis platform for analysis; the third pipeline is used to extract oil from the sampling barrel and transmit the oil to a cache barrel for temporary caching, so as to realize automatic sampling of oil production sample oil layers, control the opening and closing of the electromagnetic valve by remote control preset programming, realize the full-process automatic operation of sampling, transmission and caching, and solve the problem of relying on manual labor in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of petroleum sampling, and more specifically, to a petroleum production sample oil layer sampling device and a sampling method. Background Art

[0002] "Sample oil layer" in oil production refers to the strata specially selected and analyzed for the purpose of evaluating the reserves, quality, and mining potential of the oil reservoir during the oil exploration and development process. The sample oil layer is usually representative and can reflect the petroleum geological characteristics and mining conditions of the entire oil reservoir or a specific area.

[0003] However, in actual use, it still has many shortcomings, such as reliance on manual labor and poor sampling quality, which are specifically reflected in the following aspects:

[0004] Existing oil layer sampling relies on manual labor, but facing oil exploration wells in harsh environments, such as islands and deserts, manual sampling consumes a lot of manpower and material resources; and manual labor opens the valve at the sampling port, fills the oil into the sampling barrel, and subjectively judges whether the sampling meets the requirements to obtain the oil sample, resulting in poor sampling quality. Summary of the invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides an oil layer sampling device and a sampling method for petroleum production samples, by providing an automatic sampling device to replace manual sampling, and performing self-inspection before sampling to ensure the reliability of the automatic sampling device, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an oil layer sampling device for oil production samples, comprising a sampling barrel, an electromagnetic valve, a first pipeline, a second pipeline, and a third pipeline;

[0007] The sampling barrel is used to collect oil samples extracted from oil exploration wells. The sampling barrel is connected to the first pipeline, the second pipeline and the third pipeline. A flow rate sensor is arranged at the connection point. The sampling barrel includes an air outlet and a gravity sensor.

[0008] The first pipeline, the second pipeline, and the third pipeline include electromagnetic valves, which are used to control the opening and closing of the pipeline system to achieve automated operations of sampling, transmission, and caching; the electromagnetic valves in the first pipeline, the second pipeline, and the third pipeline are respectively recorded as the first valve, the second valve, and the third valve;

[0009] The first pipeline is used to extract oil from the oil exploration well and send the oil into the sampling barrel; the second pipeline is used to extract oil samples from the sampling barrel and transmit them to the oil analysis platform for analysis; the third pipeline is used to extract oil from the sampling barrel and transmit the oil to the cache barrel for temporary caching or subsequent processing.

[0010] Preferably, the opening and closing of the electromagnetic valve is controlled by remote control transmission operation instructions and preset programming to achieve automatic operation of the sampling mode, transmission mode and cache mode.

[0011] The preferred sampling mode refers to opening the first valve on the first pipeline to allow the oil in the oil exploration well to flow into the sampling barrel through the first pipeline, using a gravity sensor to monitor the weight change of the oil in the sampling barrel, and when the preset sampling weight is reached, closing the first valve to stop sampling;

[0012] The transmission mode means that when the weight of the oil in the sampling barrel meets the preset value, the second valve on the second pipeline is opened to transmit the oil sample in the sampling barrel to the oil analysis platform through the second pipeline; when the oil sample is completely transmitted to the analysis platform, the second valve is closed;

[0013] The cache mode refers to opening the third valve on the third pipeline so that the oil in the sampling barrel is transferred to the cache barrel through the third pipeline.

[0014] To achieve the above object, the present invention provides the following technical solution: a method for sampling an oil layer of a petroleum production sample, comprising the following steps:

[0015] Step S11, preparation stage: confirm that the oil layer sampling device for oil production samples is correctly installed and functions normally, and the sampling device is kept in an initial state, in which the first valve, the second valve and the third valve are closed;

[0016] Step S12: After receiving the sampling instruction, the sampling device opens the first valve and enters the sampling mode; the sampling process is monitored by the sensor to obtain monitoring data; when the liquid level in the sampling bucket reaches a preset value, the first valve is closed, and the collected monitoring data is transmitted to the sampling quality analysis module;

[0017] Step S13: The sampling quality analysis module is used to analyze the monitoring data and output valve control instructions.

[0018] Step S14, according to the sampling control instruction, the second valve or the third valve is opened to transmit the oil sample in the sampling barrel to the oil analysis platform or the buffer barrel respectively;

[0019] Step S15, when the oil sample in the sampling barrel is transmitted to the oil analysis platform, the oil sample sampling is completed; when the oil sample in the sampling barrel is transmitted to the buffer barrel, until the sampling barrel is emptied and the first valve is opened, return to the operation content of step S12, until the oil sample in the sampling barrel is transmitted to the oil analysis platform, the oil sample sampling is completed.

[0020] Preferably, the valve control instruction is obtained in the following manner:

[0021] Analyze monitoring data to obtain parameters describing the density and viscosity of the oil in the sampling barrel;

[0022] Input the maximum value of oil density, the minimum value of oil density, the maximum value of viscosity description parameter and the minimum value of viscosity description parameter into the sampling quality assessment model, and output the sampling quality assessment index;

[0023] Determine whether the sampling quality assessment index is lower than the threshold THa;

[0024] When the sampling quality evaluation index is lower than the threshold THa, it indicates that the quality of the oil in the current sampling barrel does not meet expectations, and the sampling control instruction is to open the third valve; when the sampling quality evaluation index is not lower than the threshold THa, it indicates that the quality of the oil in the current sampling barrel meets expectations, and the sampling control instruction is to open the second valve.

[0025] Preferably, the sampling quality assessment index QZ is obtained as follows:

[0026] Input the maximum value of oil density, the minimum value of oil density, the maximum value of viscosity description parameter and the minimum value of viscosity description parameter into the sampling quality assessment model, and output the sampling quality assessment index;

[0027] The maximum value and minimum value of the oil density in the sampling barrel are recorded as ρ_max and ρ_min respectively; the actual sampling volume and the preset sampling volume of the sampling barrel are recorded as qv_s and qv_y respectively; the maximum value and the minimum value of the viscosity description parameter of the oil in the sampling barrel are recorded as η_max and η_min respectively, and the temperature description parameter of viscosity is recorded as wy; the average value of the oil density and the average value of the oil viscosity are recorded as ρ_avg and η_avg respectively;

[0028] The sampling quality assessment model satisfies the following formula Among them, UC represents the uniformity coefficient of the oil in the sampling barrel, α1 represents the density measurement accuracy, and α2 represents the viscosity measurement accuracy.

[0029] Preferably, the analyzing and monitoring data to obtain the density of the oil in the sampling barrel refers to monitoring the sampling process through a flow sensor and a gravity sensor to obtain the weight and volume of the oil in the sampling barrel, and calculating the density of the oil in the sampling barrel through a density calculation formula; finding the maximum density and the minimum density among all recorded oil densities;

[0030] The analysis of monitoring data to obtain the viscosity description parameters in the sampling barrel refers to monitoring the sampling flow rate of the oil entering the sampling barrel through the pipeline in real time through a flow rate sensor installed on the first pipeline, and obtaining the viscosity description parameters through the mapping relationship between the sampling flow rate and the oil viscosity description parameters; among all the recorded viscosity description parameters, finding the maximum value and the minimum value of the viscosity description parameters.

[0031] Preferably, the primary classification of the quality grades of the oil exploration wells is completed based on the average value of the oil density or the average value of the oil viscosity, and the resources are allocated based on the quality grades of the oil exploration wells.

[0032] Preferably, before opening the first valve, a sampling device self-check module is also included;

[0033] The sampling device self-inspection module is used to perform self-inspection on the automatic sampling barrel, the first pipeline, the second pipeline, and the third pipeline; the sampling device self-inspection module includes a sampling barrel self-inspection unit, a pipeline self-inspection unit, and an early warning unit;

[0034] The sampling barrel self-checking unit is used to obtain the sampling barrel quality description index. The difference between the weight of the sampling barrel when it is emptied and the initial deadweight is recorded as CT1; the weight change of the sampling barrel when it is stationary is recorded as CT2; the sampling barrel quality description index Za is obtained by combining the stain influence parameter and the leakage influence parameter;

[0035] The pipeline self-inspection unit is used to obtain the pipeline quality description index. The difference between the pipeline flow rate and the initial flow rate is recorded as GT1; the difference between the appearance size and the preset size is recorded as GT2; the pipeline quality description index Zb is obtained by combining the blockage influence parameter and the size abnormality description parameter;

[0036] The early warning unit sends out early warning information based on the relationship between the sampling bucket quality description index and the pipeline quality description index and the corresponding thresholds.

[0037] Preferably, the early warning unit includes the following contents:

[0038] If the sampling bucket quality description index and pipeline quality description index exceed the corresponding threshold, a first warning is issued to prompt the user to replace the sampling device and clean the pipeline. 1、 After CT2 is dimensionally normalized, the sampling bucket quality description index Za is calculated using the following formula: About GT 1、 After GT2 is dimensionally normalized, the pipeline quality description index Zb is calculated using the following formula: If the sampling bucket quality description index and pipeline quality description index do not exceed the corresponding threshold, the formula The sampling device quality evaluation index Qz is obtained by evaluation;

[0039] Determine whether the sampling device quality assessment index exceeds the threshold value THb; if the sampling device quality assessment index exceeds the threshold value, it indicates that there is an abnormality in the sampling device, and a second warning is issued to indicate that the credibility of the sampling result corresponding to the sampling device at the current position is reduced.

[0040] Preferably, the sampling device self-inspection module is connected to the pipeline intelligent unblocking module, and the pipeline intelligent unblocking module is used to realize automatic cleaning and unblocking of the pipeline; based on the intelligent control system, ultrasonic cleaning, piston movement and high-pressure flushing of the pipeline or sampling barrel are realized to ensure the cleaning and unblocking of the pipeline and sampling barrel.

[0041] Technical effects and advantages of the present invention:

[0042] (1) The oil layer sampling device and sampling method provided by the present invention realize automatic sampling of oil layer samples in oil production by providing an oil sampling device, thereby avoiding dependence on manual labor; the opening and closing of the electromagnetic valve is controlled by remote control preset programming, thereby realizing full automation of sampling, transmission and caching, greatly reducing manual intervention, avoiding the risks that may be caused by human operation errors, and improving overall work efficiency; solving the problem of manual dependence in the prior art.

[0043] (2) The oil layer sampling device and sampling method for oil production samples provided by the present invention introduce intelligent sampling control, efficient data processing and evaluation, flexible sampling quality evaluation, comprehensive sampling device self-inspection and intelligent early warning and response measures based on the sampling quality analysis module, thereby achieving comprehensive optimization and improvement of the oil layer sampling process for oil production samples, solving the problem of poor sampling quality in the prior art. The pipeline intelligent unblocking module connected to the sampling device self-inspection module can realize automatic cleaning and unblocking of the pipeline and the sampling barrel, which helps to keep the pipeline and the sampling barrel clean and unobstructed, and further improve the sampling quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a schematic structural diagram of the oil layer sampling device for petroleum production samples of the present invention.

[0045] Figure 2 The present invention is a flow chart of the oil layer sampling method for oil production samples based on remote control.

[0046] Figure 3 The present invention is a flow chart of the oil layer sampling method for oil production samples based on the sampling quality analysis module.

[0047] Figure 4 This is a flow chart for obtaining valve control instructions of the present invention. DETAILED DESCRIPTION

[0048] The 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 set forth herein. On the contrary, these embodiments are provided 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.

[0049] At the same time, it should be understood that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0050] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application, its application, or uses.

[0051] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0052] Example 1, see Figure 1 The present invention provides a structural schematic diagram of a petroleum production sample oil layer sampling device, and an embodiment of the present invention provides a petroleum production sample oil layer sampling device, comprising:

[0053] Sampling barrel, electromagnetic valve, pipeline system, the pipeline system includes a first pipeline, a second pipeline, and a third pipeline.

[0054] The sampling barrel is used to collect oil samples extracted from oil exploration wells. The sampling barrel is connected to the first pipeline, the second pipeline and the third pipeline. A flow rate sensor is arranged at the connection point. The sampling barrel includes an air outlet and a gravity sensor. The air outlet is used to release the gas in the sampling barrel during the sampling process to prevent excessive pressure from affecting the sampling effect or causing equipment damage. The gravity sensor is used to monitor the weight change of the oil in the sampling barrel, indirectly reflecting the sampling amount, or used for safety monitoring to prevent overload.

[0055] The first pipeline, the second pipeline, and the third pipeline include electromagnetic valves, which are used to control the opening and closing of the pipeline system to achieve automated operations of sampling, transmission, and caching; the electromagnetic valves in the first pipeline, the second pipeline, and the third pipeline are respectively recorded as the first valve, the second valve, and the third valve;

[0056] The first pipeline is used to extract oil from the oil exploration well and send the oil into the sampling barrel; the second pipeline is used to extract oil samples from the sampling barrel and transmit them to the oil analysis platform for analysis; the third pipeline is used to extract oil from the sampling barrel and transmit the oil to the cache barrel for temporary caching or subsequent processing.

[0057] What needs to be further explained in the embodiments of the present invention is that by remotely controlling the transmission of operating instructions and preset programming to control the opening and closing of the electromagnetic valve, the automatic operation of the sampling mode, transmission mode and cache mode is realized, which facilitates the adjustment of the sampling and transmission processes and improves the sampling efficiency and safety.

[0058] Summary: Example 1 provides an oil sampling device to achieve automatic sampling of oil layers for oil production samples and avoid dependence on manual labor; remote control preset programming is used to control the opening and closing of electromagnetic valves, thereby achieving full automation of sampling, transmission and caching, greatly reducing manual intervention, avoiding the risks caused by human operational errors, and improving overall work efficiency; through remote control and preset programs, operators can complete all operations in a safe area, greatly reducing the possibility of accidents and ensuring the safety of personnel's lives.

[0059] Example 2, see Figure 2 Based on the flow chart of the remote controlled oil production sample oil layer sampling method, an embodiment of the present invention provides an oil production sample oil layer sampling method, using the above oil production sample oil layer sampling device, including the following steps:

[0060] Step S01, preparation stage: confirm that the oil layer sampling device (including sampling barrel, electromagnetic valve, pipeline system) of oil production samples is installed correctly and functions normally (various components such as flow rate sensor, gravity sensor, air outlet); the remote control system and preset program are ready and can send operation instructions to the electromagnetic valve;

[0061] Step S02, controlling the opening and closing of the electromagnetic valve by remote control transmission operation instructions and preset programming to realize automatic operation of sampling mode, transmission mode and cache mode;

[0062] The sampling mode means that the first valve on the first pipeline is opened to allow the oil in the oil exploration well to flow into the sampling barrel through the first pipeline, the flow rate sensor is monitored, and the gas in the sampling barrel is released through the air outlet to prevent excessive pressure; the gravity sensor is used to monitor the weight change of the oil in the sampling barrel, and when the preset sampling weight is reached, the first valve is closed to stop sampling;

[0063] The transmission mode means that when the weight of the oil in the sampling barrel meets the preset value, the second valve on the second pipeline is opened to transmit the oil sample in the sampling barrel to the oil analysis platform through the second pipeline; when the oil sample is completely transmitted to the analysis platform, the second valve is closed;

[0064] The cache mode means that if the oil quality in the sampling barrel does not meet the requirements, such as containing too many impurities or abnormal color, the third valve on the third pipeline is opened to transfer the oil in the sampling barrel to the cache barrel through the third pipeline.

[0065] In a possible embodiment, the cache mode is turned on by remote control and preset programming, and the third valve on the third pipeline is automatically opened after a preset time period (such as after a traditional sampling time); the preset time period is set according to the actual needs of oil production and sampling specifications. For example, in some cases, sampling may be required after a period of sampling to ensure the representativeness and accuracy of the sampling. Through preset programming, the third valve is automatically opened in the preset time period to start the cache mode.

[0066] In summary, Example 2 provides a sampling method for an oil production sample oil layer sampling device based on an oil production sample oil layer sampling device, and further defines how to control the opening and closing of the electromagnetic valve by programming or preset frequency to realize the specific method of automated operation of sampling, transmission and caching. The oil production sample oil layer sampling method provides a reliable and efficient solution for sample sampling in the oil production process through the advantages of high automation, flexibility and adaptability, safety and stability, high efficiency and accuracy, intelligence and maintainability.

[0067] Example 3, see Figure 3 Flow chart of the oil layer sampling method for oil production samples based on the sampling quality analysis module, see Figure 4 The valve control instruction acquisition flow chart of the present invention provides a method for sampling an oil layer of a petroleum production sample, comprising the following steps:

[0068] Step S11, preparation stage: confirm that the oil layer sampling device for oil production samples is correctly installed and functions normally, connect the sampling device to the pipeline of the oil exploration well, and connect the first pipeline to the oil exploration well; the sampling device is kept in an initial state, in which the first valve, the second valve and the third valve are closed;

[0069] Step S12: sending a sampling instruction based on remote control or a preset program, after receiving the sampling instruction, the sampling device opens the first valve, extracts oil samples from the oil exploration well into the sampling barrel through the first pipeline, and enters the sampling mode; the sampling process is monitored by the sensor to obtain monitoring data; the monitoring data at least includes the weight of the oil in the sampling barrel, the volume of the oil, and the sampling flow rate and flow rate time of the sampling process; when the liquid level line in the sampling barrel reaches the preset value, the first valve is closed, and the collected monitoring data is transmitted to the sampling quality analysis module;

[0070] Step S13: The sampling quality analysis module is used to analyze the monitoring data and output valve control instructions.

[0071] Step S14, according to the sampling control instruction, the second valve or the third valve is opened to transmit the oil sample in the sampling barrel to the oil analysis platform or the buffer barrel respectively;

[0072] Step S15, when the oil sample in the sampling barrel is transmitted to the oil analysis platform, the oil sample sampling is completed; when the oil sample in the sampling barrel is transmitted to the buffer barrel, until the sampling barrel is emptied and the first valve is opened, return to the operation content of step S12, until the oil sample in the sampling barrel is transmitted to the oil analysis platform, the oil sample sampling is completed.

[0073] It needs to be further explained in the embodiment of the present invention that the valve control instruction is obtained in the following manner:

[0074] Analyze monitoring data to obtain parameters describing the density and viscosity of the oil in the sampling barrel;

[0075] Input the maximum value of oil density, the minimum value of oil density, the maximum value of viscosity description parameter and the minimum value of viscosity description parameter into the sampling quality assessment model, and output the sampling quality assessment index;

[0076] Determine whether the sampling quality assessment index is lower than the threshold THa;

[0077] When the sampling quality evaluation index is lower than the threshold THa, it indicates that the quality of the oil in the current sampling barrel does not meet expectations, and the sampling control instruction content is to open the third valve to output the oil in the sampling barrel to the cache barrel; when the sampling quality evaluation index is not lower than the threshold THa, it indicates that the quality of the oil in the current sampling barrel meets expectations, and the sampling control instruction content is to open the second valve to output the oil in the sampling barrel to the oil analysis platform.

[0078] It is further explained in the embodiment of the present invention that the analysis of monitoring data to obtain the density of the oil in the sampling barrel refers to monitoring the sampling process through a flow sensor and a gravity sensor to obtain the weight and volume of the oil in the sampling barrel, and calculating the density of the oil in the sampling barrel through a density calculation formula; finding the maximum density and the minimum density among all recorded oil densities;

[0079] The viscosity description parameters in the sampling barrel obtained by analyzing the monitoring data refer to monitoring the sampling flow rate of the oil entering the sampling barrel through the pipeline in real time through the flow rate sensor installed on the first pipeline, and the flow rate data will be used as the basis for the subsequent calculation of the oil viscosity description parameters; the viscosity description parameters are obtained through the mapping relationship between the sampling flow rate and the oil viscosity description parameters; and the maximum value and the minimum value of the viscosity description parameters are found among all the recorded viscosity description parameters.

[0080] Explanation: A mapping relationship between flow rate and petroleum viscosity description parameters under standard hydraulic conditions is established based on experimental data. The mapping relationship is used to convert the flow rate value into the corresponding petroleum viscosity description parameter. The embodiment of the present invention does not specifically limit the petroleum viscosity description parameter. The petroleum viscosity description parameter can be a direct viscosity value or a relative value or index reflecting the viscosity characteristics; during the sampling process, the real-time flow rate value monitored by the flow rate sensor is converted into the corresponding petroleum viscosity description parameter according to the known or preset mapping relationship between flow rate and petroleum viscosity; the viscosity description parameters are continuously recorded and compared, and the viscosity description parameters are obtained through the conversion of the mapping relationship; the maximum value of the viscosity description parameter reflects the highest level or the most viscous state of the petroleum viscosity during the sampling process, and the minimum value of the viscosity description parameter reflects the lowest level or the thinnest state of the petroleum.

[0081] It needs to be further explained in the embodiment of the present invention that the sampling quality evaluation index QZ is obtained in the following manner:

[0082] Input the maximum value of oil density, the minimum value of oil density, the maximum value of viscosity description parameter and the minimum value of viscosity description parameter into the sampling quality assessment model, and output the sampling quality assessment index;

[0083] The maximum value and minimum value of the oil density in the sampling barrel are recorded as ρ_max and ρ_min respectively; the actual sampling volume and the preset sampling volume of the sampling barrel are recorded as qv_s and qv_y respectively; the maximum value and the minimum value of the viscosity description parameter of the oil in the sampling barrel are recorded as η_max and η_min respectively, and the temperature description parameter of viscosity is recorded as wy; the average value of the oil density and the average value of the oil viscosity are recorded as ρ_avg and η_avg respectively;

[0084] The sampling quality assessment model satisfies the following formula

[0085] Among them, UC represents the uniformity coefficient of the oil in the sampling barrel, α1 represents the density measurement accuracy, and α2 represents the viscosity measurement accuracy.

[0086] Explanation: Under the action of hydraulic power, the oil enters the sampling barrel through the first pipe, and the hydraulic power is kept constant. The slower the flow rate, the greater the oil viscosity at this time; therefore, there is a certain corresponding relationship between the input flow rate and the oil viscosity. When the oil viscosity changes greatly during the sampling process, it indicates that the oil sampling is uneven; the density of the oil in the sampling barrel changes greatly, indicating that the oil sampling is uneven; dividing the change range by the average viscosity is calculating a relative value, which reflects the comparison between the severity of the viscosity change and the average level; the value obtained by dividing the change range by the average viscosity is calculating a relative value.

[0087] In a possible embodiment, the primary classification of oil exploration well quality grades is completed based on the average oil density or the average oil viscosity, and resources are allocated based on the oil exploration well quality grades, such as transmission resources, analysis resources, and attention resources.

[0088] Explanation: Allocating resources according to the quality grade of oil exploration wells can ensure that limited resources are used more rationally; high-quality exploration wells may require more transmission, analysis and attention resources to fully explore their potential; while low-quality exploration wells may require relatively less resource investment; reasonable resource allocation can significantly improve the efficiency of sampling and analysis; for high-quality exploration wells, more attention resources can be quickly carried out in detailed exploration and evaluation so that mining plans can be formulated in a timely manner; and for low-quality exploration wells, unnecessary waste of resources can be avoided and more energy can be invested in more valuable exploration areas.

[0089] In a possible embodiment, before opening the first valve, a sampling device self-check module is included;

[0090] The sampling device self-inspection module is used to perform self-inspection on the automatic sampling barrel, the first pipeline, the second pipeline, and the third pipeline; the sampling device self-inspection module includes a sampling barrel self-inspection unit, a pipeline self-inspection unit, and an early warning unit; the purpose of the self-inspection is to ensure that there are no impurities in the sampling barrel, and the first sampling pipeline and the second sampling pipeline are operating normally, that is, there is no blockage, no leakage, and no deformation;

[0091] The sampling barrel self-checking unit is used to obtain the sampling barrel quality description index. The difference between the weight of the sampling barrel when it is emptied and the initial dead weight is recorded as CT1, which represents the stain influence parameter of the sampling barrel; the weight change of the sampling barrel when it is stationary (meaning when there is no input or output) is recorded as CT2, which represents the leakage influence parameter of the sampling barrel; the sampling barrel quality description index Za is obtained by combining the stain influence parameter and the leakage influence parameter;

[0092] The pipeline self-inspection unit is used to obtain the pipeline quality description index. The difference between the pipeline flow rate and the initial flow rate is recorded as GT1, which represents the blockage impact parameter; the difference between the appearance size and the preset size is recorded as GT2, which represents the size abnormality description parameter. The pipeline quality description index Zb is obtained by combining the blockage impact parameter and the size abnormality description parameter;

[0093] In a possible embodiment, a specific method for obtaining the change in pipeline flow rate is defined. The sampling device is disconnected from the pipeline of the oil exploration well, and the sampling device is connected to a water pipe, that is, the first pipeline is connected to the water pipe, and the pipeline flow rate change is obtained by measuring the difference between the flow rate of water in the pipeline and the preset flow rate. It is explained that the sampling device is disconnected from the pipeline of the oil exploration well. This step is to isolate the sampling device from the original working environment for independent testing and evaluation. This ensures that the test process will not be affected by other factors in the oil exploration well, thereby improving the accuracy and reliability of the test. By comparing the difference between the actual flow rate and the preset flow rate, the degree of change in the pipeline flow rate is quantitatively evaluated, and whether the operating status of the pipeline is good is judged accordingly.

[0094] The early warning unit sends out early warning information based on the relationship between the sampling bucket quality description index and the pipeline quality description index and the corresponding threshold value.

[0095] In a possible embodiment, the early warning unit includes the following contents:

[0096] If the sampling bucket quality description index and pipeline quality description index exceed the corresponding threshold, a first warning is issued to prompt the user to replace the sampling device and clean the pipeline. 1、 After CT2 is dimensionally normalized, the sampling bucket quality description index Za is calculated using the following formula: About GT 1、 After GT2 is dimensionally normalized, the pipeline quality description index Zb is calculated using the following formula: If the sampling bucket quality description index and pipeline quality description index do not exceed the corresponding threshold, the formula The sampling device quality evaluation index Qz is obtained by evaluation;

[0097] Determine whether the sampling device quality assessment index exceeds the threshold value THb; if the sampling device quality assessment index exceeds the threshold value, it indicates that there is an abnormality in the sampling device, and a second warning is issued to indicate that the credibility of the sampling result corresponding to the sampling device at the current position is reduced.

[0098] In a possible embodiment, the sampling device self-inspection module is connected to the pipeline intelligent unblocking module, and the pipeline intelligent unblocking module is used to realize automatic cleaning and unblocking of the pipeline; based on the intelligent control system, ultrasonic cleaning, piston movement, and high-pressure flushing of the pipeline or sampling barrel are realized to ensure the cleaning and unblocking of the pipeline and sampling barrel.

[0099] Explanation: When manual sampling is not possible, sampling can only be carried out through intelligent sampling devices. In order to ensure the sampling quality, the intelligent sampling device needs to be self-checked to ensure the reliability of the automatic sampling device. When blockage is found in the oil pipeline, a pipeline intelligent dredging procedure is provided to achieve automatic cleaning and dredging of the pipeline. Based on the intelligent control system, ultrasonic cleaning, piston movement and high-pressure flushing of the pipeline or sampling barrel are realized to ensure the cleaning and dredging of the pipeline and sampling barrel.

[0100] In a possible embodiment: ultrasonic cleaning of a pipeline or a sampling barrel is realized based on an integrated intelligent control system, and the injection of a cleaning liquid, the start and stop of ultrasonic waves, and the adjustment of vibration intensity and duration are automatically controlled to improve operation efficiency and accuracy, including:

[0101] Pour cleaning liquid into the pipeline and automatic sampling barrel, vibrate repeatedly after ultrasonic cleaning and drain. For non-solid blockages (such as grease, impurity deposits), inject appropriate cleaning liquid into the pipeline and sampling barrel to effectively dissolve or soften the blockage; then, use the high-frequency vibration energy of ultrasound to further decompose these substances, making them easier to flush away; finally, mechanical vibration is used to cause the residue to fall off and discharge it through the drain system or recovery device at the end of the pipeline.

[0102] In a possible embodiment, the piston movement of the pipeline or sampling barrel is realized based on an integrated intelligent control system, and an integrated sensor monitors the piston position and pipeline pressure, and adjusts the power output to avoid pipeline damage caused by excessive force, including:

[0103] A piston is provided in the pipeline and the automatic sampling barrel to achieve dredging through the piston. By providing a piston that can move freely in the pipeline and cooperating with a certain power source (such as hydraulic pressure, pneumatic pressure or electric motor), the piston is pushed to move along the pipeline and the intelligent sampling barrel, thereby compressing, pushing or crushing the blockage to achieve dredging.

[0104] In a possible embodiment: high-pressure flushing of a pipeline or a sampling barrel is realized based on an integrated intelligent control system, and the injection parameters are automatically adjusted according to the blockage situation, including:

[0105] The high-pressure gas or water flushing technology is introduced, using high-pressure gas (such as nitrogen, carbon dioxide) or water to spray directly into the blocked area through a special nozzle, and using the impact force of the high-pressure fluid to disintegrate or flush away the blockage; the pressure and flow can be adjusted to adapt to different types of blockages; a reasonable nozzle layout and spray angle are provided to improve the cleaning effect.

[0106] In summary, Example 3 provided by the present invention introduces intelligent sampling control, efficient data processing and evaluation, flexible sampling quality evaluation, comprehensive sampling device self-inspection, and intelligent early warning and response measures based on the sampling quality analysis module, thereby achieving comprehensive optimization and improvement of the oil layer sampling process of oil production samples, and solving the problem of poor sampling quality in the prior art. The pipeline intelligent unblocking module connected to the sampling device self-inspection module can realize automatic cleaning and unblocking of pipelines and sampling barrels, which helps to keep pipelines and sampling barrels clean and unobstructed, and further improve the sampling quality.

[0107] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for sampling an oil layer for oil production, characterized in that: The following steps are involved: Step S11, preparation stage: confirm that the oil layer sampling device for oil production samples is correctly installed and functions normally, and the sampling device is kept in an initial state, in which the first valve, the second valve and the third valve are closed; Step S12: After receiving the sampling instruction, the sampling device opens the first valve and enters the sampling mode; the sampling process is monitored by the sensor to obtain monitoring data; when the liquid level in the sampling bucket reaches a preset value, the first valve is closed, and the collected monitoring data is transmitted to the sampling quality analysis module; Step S13: The sampling quality analysis module is used to analyze the monitoring data and output valve control instructions; The valve control instruction acquisition method is as follows: analyzing the monitoring data to obtain the density and viscosity description parameters of the oil in the sampling barrel; calculating the sampling quality evaluation index based on the monitoring data, and judging whether the sampling quality evaluation index is lower than the threshold value THa; when the sampling quality evaluation index is lower than the threshold value THa, it indicates that the quality of the oil in the current sampling barrel does not meet expectations, and the sampling control instruction content is to open the third valve; when the sampling quality evaluation index is not lower than the threshold value THa, it indicates that the quality of the oil in the current sampling barrel meets expectations, and the sampling control instruction content is to open the second valve; The sampling quality assessment index QZ is obtained as follows: The maximum value and minimum value of the oil density in the sampling barrel are recorded as ρ_max and ρ_min respectively; the actual sampling volume and the preset sampling volume of the sampling barrel are recorded as qv_s and qv_y respectively; the maximum value and the minimum value of the viscosity description parameter of the oil in the sampling barrel are recorded as η_max and η_min respectively, and the temperature is recorded as wy. The average value of the oil density and the average value of the oil viscosity are recorded as ρ_avg and η_avg respectively; the sampling quality assessment model satisfies the following formula: Where UC represents the uniformity coefficient of the oil in the sampling barrel, α1 represents the density measurement accuracy, and α2 represents the viscosity measurement accuracy; Step S14, according to the sampling control instruction, the second valve or the third valve is opened to transmit the oil sample in the sampling barrel to the oil analysis platform or the buffer barrel respectively; Step S15, when the oil sample in the sampling barrel is transmitted to the oil analysis platform, the oil sample sampling is completed; when the oil sample in the sampling barrel is transmitted to the buffer barrel, until the sampling barrel is emptied and the first valve is opened, return to the operation content of step S12, until the oil sample in the sampling barrel is transmitted to the oil analysis platform, the oil sample sampling is completed.

2. The oil layer sampling method for oil production samples according to claim 1, characterized in that: Based on the average value of oil density or oil viscosity, the primary classification of oil exploration well quality grades is completed, and resources are allocated according to the oil exploration well quality grades.

3. The oil layer sampling method for oil production samples according to claim 2, characterized in that: Before opening the first valve, the process also includes a self-checking process of the self-checking module of the sampling device; The sampling device self-inspection module is used to perform self-inspection on the automatic sampling barrel, the first pipeline, the second pipeline, and the third pipeline; the sampling device self-inspection module includes a sampling barrel self-inspection unit, a pipeline self-inspection unit, and an early warning unit; The sampling barrel self-checking unit is used to obtain the sampling barrel quality description index. The difference between the weight of the sampling barrel when it is emptied and the initial deadweight is recorded as CT1; the weight change of the sampling barrel when it is stationary is recorded as CT2; the sampling barrel quality description index Za is obtained by combining the stain influence parameter and the leakage influence parameter; The pipeline self-inspection unit is used to obtain the pipeline quality description index. The difference between the pipeline flow rate and the initial flow rate is recorded as GT1; the difference between the appearance size and the preset size is recorded as GT2; the pipeline quality description index Zb is obtained by combining the blockage influence parameter and the size abnormality description parameter; The early warning unit sends out early warning information based on the relationship between the sampling bucket quality description index and the pipeline quality description index and the corresponding threshold value.

4. The oil layer sampling method for oil production samples according to claim 3 is characterized in that: The early warning unit includes the following contents: If the sampling bucket quality description index and pipeline quality description index exceed the corresponding threshold, the first warning is issued to prompt the user to replace the sampling device and clean the pipeline. After normalizing CT1 and CT2, the sampling bucket quality description index Za is calculated by the following formula: About GT 1、 After GT2 is dimensionally normalized, the pipeline quality description index Zb is calculated using the following formula: If the sampling bucket quality description index and pipeline quality description index do not exceed the corresponding threshold, the formula The sampling device quality evaluation index Qz is obtained by evaluation; Determine whether the sampling device quality assessment index exceeds the threshold value THb; if the sampling device quality assessment index exceeds the threshold value, it indicates that there is an abnormality in the sampling device, and a second warning is issued to indicate that the credibility of the sampling result corresponding to the sampling device at the current position is reduced.

5. The oil layer sampling method for oil production samples according to claim 4, characterized in that: The sampling device self-inspection module is connected to the pipeline intelligent dredging module, which is used to realize automatic cleaning and dredging of the pipeline; based on the intelligent control system, ultrasonic cleaning, piston movement and high-pressure flushing of the pipeline or sampling barrel are realized to ensure the cleaning and dredging of the pipeline and the sampling barrel.

6. The oil layer sampling method for oil production samples according to claim 4, characterized in that: The oil production sample oil layer sampling method comprises an oil production sample oil layer sampling device, comprising a sampling barrel, an electromagnetic valve, and a pipeline system, wherein the pipeline system comprises a first pipeline, a second pipeline, and a third pipeline, wherein the sampling barrel is used to collect oil samples extracted from an oil exploration well, the sampling barrel is connected to the first pipeline, the second pipeline, and the third pipeline, a flow rate sensor is arranged at the connection point, and the sampling barrel comprises an air outlet and a gravity sensor; The first pipeline, the second pipeline, and the third pipeline include electromagnetic valves, which are used to control the opening and closing of the pipeline system to achieve automated operations of sampling, transmission, and caching; the electromagnetic valves in the first pipeline, the second pipeline, and the third pipeline are respectively recorded as the first valve, the second valve, and the third valve; The first pipeline is used to extract oil from the oil exploration well and send the oil into the sampling barrel; the second pipeline is used to extract oil samples from the sampling barrel and transmit them to the oil analysis platform for analysis; the third pipeline is used to extract oil from the sampling barrel and transmit the oil to the cache barrel for temporary caching or subsequent processing.

7. The oil layer sampling method for oil production samples according to claim 6, characterized in that: The opening and closing of the electromagnetic valve is controlled by remote control transmission operation instructions and preset programming to realize the automatic operation of sampling mode, transmission mode and cache mode.

8. The oil layer sampling method for oil production samples according to claim 7, characterized in that: The sampling mode refers to opening the first valve on the first pipeline to allow the oil in the oil exploration well to flow into the sampling barrel through the first pipeline, using a gravity sensor to monitor the weight change of the oil in the sampling barrel, and when the preset sampling weight is reached, closing the first valve to stop sampling; The transmission mode means that when the weight of the oil in the sampling barrel meets the preset value, the second valve on the second pipeline is opened to transmit the oil sample in the sampling barrel to the oil analysis platform through the second pipeline; when the oil sample is completely transmitted to the analysis platform, the second valve is closed; The cache mode refers to opening the third valve on the third pipeline so that the oil in the sampling barrel is transferred to the cache barrel through the third pipeline.

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