Fully automatic detection method of water content in crude oil nondestructive testing instrument

Abstract

The present invention relates to the technical field of monitoring the water content of crude oil, and proposes a fully automatic detection method for the water content of crude oil non-destructive testing instrument, including: collecting electromagnetic wave data, fluid flow rate and temperature of the crude oil to be detected in a preset monitoring time period; determining the fluid fluidity and fluid flow interference of the crude oil to be detected in the monitoring time period; determining the electromagnetic wave attenuation evaluation value of the crude oil to be detected in the monitoring time period; according to the difference between the change trends corresponding to the electromagnetic wave data and the temperature at all acquisition moments in the monitoring time period, and the fluid flow interference of the crude oil to be detected in the monitoring time period, determining the water content influence of the crude oil to be detected in the monitoring time period, and obtaining the water content detection result of the crude oil to be detected according to the electromagnetic wave attenuation evaluation value and the water content influence of the crude oil to be detected in the monitoring time period. The present invention aims to solve the problem that the temperature and fluid flow rate changes of crude oil interfere with the unstable detection result of the water content of crude oil.

Description

Technical Field

[0001] The invention relates to the technical field of monitoring the water content of crude oil, and in particular to a fully automatic detection method for the water content of a crude oil nondestructive detector. Background Art

[0002] The water content in crude oil affects the calorific value and refining efficiency of crude oil. At the same time, when the water content in crude oil is too high, excessive water may cause corrosion of pipelines and equipment, increasing maintenance costs. Therefore, it is necessary to accurately detect the water content of crude oil to improve production efficiency and reduce maintenance costs. There are two methods for detecting the water content of crude oil: offline measurement and online measurement. Among them, the online measurement method can realize real-time monitoring of the water content of crude oil, timely adjust the production process, and improve emergency management capabilities.

[0003] When using the online measurement method to detect the water content of crude oil, it is easily disturbed by changes in the temperature of the crude oil and the flow rate of the fluid, making the measurement results unstable. Summary of the invention

[0004] The present invention provides a fully automatic detection method for the water content of crude oil by a nondestructive testing instrument, so as to solve the problem that the crude oil temperature and fluid flow rate change interfere and make the crude oil water content detection result unstable. The technical scheme adopted is as follows:

[0005] An embodiment of the present invention provides a method for fully automatic detection of water content of crude oil by a nondestructive testing instrument, the method comprising the following steps:

[0006] Collect electromagnetic wave data, fluid flow rate and temperature of the crude oil to be tested at different collection times within a preset monitoring time period;

[0007] According to the difference of fluid flow rate of the crude oil to be tested at different sampling moments within the monitoring time period, the fluid flowability of the crude oil to be tested during the monitoring time period is determined, and the fluid flow interference degree of the crude oil to be tested during the monitoring time period is determined by combining the difference between the electromagnetic wave data at all sampling moments within the monitoring time period and the corresponding change trend of the fluid flow rate;

[0008] According to the change of electromagnetic wave data at adjacent collection times within the monitoring time period and the disorder of electromagnetic wave data at all collection times within the monitoring time period, the electromagnetic wave attenuation evaluation value of the crude oil to be tested within the monitoring time period is determined;

[0009] According to the difference between the electromagnetic wave data and the corresponding temperature change trend at all acquisition moments in the monitoring time period, and the fluid flow interference degree of the crude oil to be tested in the monitoring time period, the influence degree of the water content of the crude oil to be tested in the monitoring time period is determined, and the water content detection result of the crude oil to be tested is obtained according to the electromagnetic wave attenuation evaluation value and the water content influence degree of the crude oil to be tested in the monitoring time period.

[0010] Furthermore, the specific method for determining the fluidity of the crude oil to be tested during the monitoring period is:

[0011] The absolute value of the difference between the fluid flow rates of the crude oil to be tested at two different collection times within the monitoring time period is recorded as the fluid flow rate difference at the two different collection times, and the average value of the fluid flow rate differences at all different collection times within the monitoring time period is recorded as the fluid fluidity of the crude oil to be tested during the monitoring time period.

[0012] Furthermore, the difference between the electromagnetic wave data at all acquisition moments in the monitoring time period and the change trend corresponding to the fluid flow rate is combined to determine the fluid flow interference degree of the crude oil to be tested in the monitoring time period, including the specific method of:

[0013] Arrange the electromagnetic wave data at all acquisition times within the monitoring period in the order of the acquisition times to obtain an electromagnetic wave data sequence;

[0014] Arrange the fluid flow rates at all sampling moments within the monitoring time period in the order of the sampling moments to obtain a fluid flow rate sequence;

[0015] The fluid flow interference degree of the crude oil to be detected during the monitoring period is determined according to the similarity of the change trends of the electromagnetic wave data sequence and the fluid flow rate sequence, as well as the fluid fluidity of the crude oil to be detected during the monitoring period.

[0016] Further, the fluid flow interference degree of the crude oil to be detected in the monitoring time period is determined according to the similarity between the change trends of the electromagnetic wave data sequence and the fluid flow rate sequence, and the fluidity of the crude oil to be detected in the monitoring time period, including the specific method of:

[0017] The absolute value of the similarity between the electromagnetic wave data sequence and the fluid flow rate sequence is recorded as the fluid flow rate influence of the crude oil to be tested in the monitoring time period;

[0018] The fluid flow interference degree of the crude oil to be tested during the monitoring period is determined according to the fluid fluidity and fluid flow velocity influence of the crude oil to be tested during the monitoring period.

[0019] Further, the fluid flow interference degree of the crude oil to be detected in the monitoring time period is determined according to the fluid fluidity and fluid flow velocity influence of the crude oil to be detected in the monitoring time period, including the specific method of:

[0020] The ratio of the fluid fluidity of the crude oil to be tested in the monitoring period to the fluid velocity influence is recorded as the fluid flow interference degree of the crude oil to be tested in the monitoring period.

[0021] Furthermore, the specific method for obtaining the electromagnetic wave attenuation evaluation value of the crude oil to be detected during the monitoring period is:

[0022] Any collection time in the monitoring time period is recorded as the target collection time, and the ratio of the electromagnetic wave data at the target collection time to the next adjacent collection time of the target collection time is recorded as the electromagnetic wave data attenuation rate at the target collection time;

[0023] The electromagnetic wave attenuation evaluation value of the crude oil to be tested in the monitoring time period is determined according to the attenuation rate of the electromagnetic wave data at all collection moments in the monitoring time period and the disorder degree of the electromagnetic wave data at all collection moments in the monitoring time period.

[0024] Furthermore, the electromagnetic wave attenuation evaluation value of the crude oil to be tested in the monitoring time period is determined according to the attenuation rate of the electromagnetic wave data at all acquisition moments in the monitoring time period and the degree of disorder of the electromagnetic wave data at all acquisition moments in the monitoring time period, including the specific method of:

[0025] The average attenuation rate of the electromagnetic wave data at all acquisition moments in the monitoring period is recorded as the average attenuation rate of the electromagnetic wave data in the monitoring period;

[0026] The normalized value of the product of the variance of the electromagnetic wave data at all acquisition moments in the monitoring period and the average attenuation rate of the electromagnetic wave data in the monitoring period is recorded as the electromagnetic wave attenuation evaluation value of the crude oil to be tested in the monitoring period.

[0027] Further, the influence degree of water content of the crude oil to be tested in the monitoring time period is determined according to the difference between the change trends of the electromagnetic wave data and the temperature at all acquisition moments in the monitoring time period and the fluid flow interference degree of the crude oil to be tested in the monitoring time period, including the specific method of:

[0028] Arrange the temperatures at all sampling moments within the monitoring period in the order of the sampling moments to obtain a temperature sequence;

[0029] The absolute value of the similarity between the electromagnetic wave data sequence and the temperature sequence is recorded as the electromagnetic wave attenuation authenticity of the crude oil to be tested during the monitoring period;

[0030] According to the electromagnetic wave attenuation authenticity and fluid flow interference degree of the crude oil to be tested in the monitoring time period, the influence degree of the water content of the crude oil to be tested in the monitoring time period is obtained.

[0031] Furthermore, the water content influence of the crude oil to be detected in the monitoring time period is obtained according to the electromagnetic wave attenuation authenticity and fluid flow interference of the crude oil to be detected in the monitoring time period, including the specific method of:

[0032] The ratio of the electromagnetic wave attenuation authenticity of the crude oil to be tested during the monitoring period to the fluid flow interference is recorded as the water content influence of the crude oil to be tested during the monitoring period.

[0033] Further, the water content detection result of the crude oil to be detected is obtained according to the electromagnetic wave attenuation evaluation value and the water content influence degree of the crude oil to be detected in the monitoring time period, including the specific method of:

[0034] The normalized value of the sum of the square of the electromagnetic wave attenuation evaluation value and the water content influence degree of the crude oil to be tested in the monitoring time period is recorded as the first normalized value of the crude oil to be tested in the monitoring time period;

[0035] The first normalized value of the crude oil to be tested in the monitoring time period is expressed in percentage as a water content test result of the crude oil to be tested.

[0036] The beneficial effects of the present invention are:

[0037] The present application takes into account the problem that when using an online measurement method to detect the water content of crude oil, it is easily disturbed by the change in fluid flow rate, making the measurement result of the water content of crude oil unstable. According to the difference between the fluid flow rates at different collection times within the monitoring time period, and the difference between the electromagnetic wave data and the change trend corresponding to the fluid flow rate, the degree to which the crude oil to be tested is affected by its own fluid flow is evaluated, and the fluid flow interference degree of the crude oil to be tested during the monitoring time period is obtained; then, according to the characteristics that water has a higher dielectric constant and a stronger conductivity than crude oil, it is determined that the crude oil to be tested with a higher water content will absorb electromagnetic waves more strongly, so that the collected electromagnetic wave data will present The external manifestation of the obvious attenuation trend is analyzed by analyzing the attenuation trend of the electromagnetic wave data at different collection times during the monitoring period, and the electromagnetic wave attenuation evaluation value of the crude oil to be tested during the monitoring period is determined; further, the authenticity of the electromagnetic wave attenuation phenomenon caused by the change in dielectric constant due to the high water content in the crude oil to be tested is evaluated, and the influence of the water content of the crude oil to be tested during the monitoring period is determined; finally, according to the electromagnetic wave attenuation evaluation value and the influence of water content of the crude oil to be tested during the monitoring period, the water content detection result of the crude oil to be tested is obtained, so as to solve the problem that the temperature and fluid flow rate changes of the crude oil interfere with the unstable detection result of the water content of the crude oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0039] Figure 1 A schematic flow chart of a method for fully automatic detection of water content in a crude oil nondestructive detector provided by an embodiment of the present invention;

[0040] Figure 2A flow chart for obtaining fluid flow disturbance degree provided by one embodiment of the present invention. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] See also Figure 1 , which shows a flow chart of a method for fully automatic detection of water content of a crude oil nondestructive detector provided by an embodiment of the present invention, the method comprising the following steps:

[0043] Step S001: Collect electromagnetic wave data, fluid flow rate and temperature of the crude oil to be tested at different collection times within a preset monitoring time period.

[0044] The non-destructive testing instrument for online measurement of water content in crude oil includes electromagnetic wave monitoring equipment, flow meter and thermometer. Among them, the electromagnetic wave monitoring equipment includes electromagnetic wave transmitter and receiver.

[0045] The electromagnetic wave transmitter of the nondestructive testing instrument is used to transmit electromagnetic wave signals to the crude oil to be tested, and the receiver is used to receive the electromagnetic wave data after passing through the crude oil to be tested.

[0046] Preferably, in one embodiment of the present application, 10 minutes is used as a monitoring time period, and all monitored electromagnetic wave data within the same detection time period are analyzed, and the sampling frequency of the electromagnetic wave data is 10 Hz. In actual application, as other implementation methods, the implementer can determine the value of the sampling rate and the length of the monitoring time period according to actual conditions, and this application does not impose any special restrictions.

[0047] At each sampling moment of the electromagnetic wave data, a flow meter is used to collect the fluid flow rate of the crude oil to be tested, and a thermometer is used to collect the temperature of the crude oil to be tested.

[0048] At this point, the electromagnetic wave data, fluid flow rate and temperature of the crude oil to be tested at different collection times within the monitoring period are obtained.

[0049] Step S002: Determine the fluid fluidity of the crude oil to be detected during the monitoring period according to the difference in fluid flow rate at different sampling moments during the monitoring period, and determine the fluid flow interference degree of the crude oil to be detected during the monitoring period by combining the difference between the electromagnetic wave data at all sampling moments during the monitoring period and the corresponding change trend of the fluid flow rate.

[0050] When using the online measurement method to detect the water content of the crude oil to be tested, it is easy to be disturbed by the change of fluid flow rate, making the measurement result of the water content of the crude oil unstable. Therefore, it is necessary to analyze the difference between the fluid flow rates at different acquisition times within the monitoring period.

[0051] The fluidity of the crude oil to be tested in the monitoring time period is determined according to the difference in fluid flow rates of the crude oil to be tested at different sampling moments in the monitoring time period.

[0052] Preferably, as an embodiment of the present application, the absolute value of the difference between the fluid flow rates of the crude oil to be tested at two different collection times within the monitoring time period is recorded as the fluid flow rate difference at the two different collection times, and the average of the fluid flow rate differences at all different collection times within the monitoring time period is recorded as the fluid fluidity of the crude oil to be tested during the monitoring time period.

[0053] The greater the difference between the fluid flow rates at two different collection times within the monitoring time period, the greater the difference in fluid flow rates at the two different collection times, and the greater the difference in fluidity of the crude oil to be tested at these two collection times. Further, when the greater the difference in fluid flow rates at all different collection times within the monitoring time period, the greater the difference in fluidity of the crude oil to be tested within the monitoring time period, the greater the possibility of deviation and error in the measurement results of the water content of the crude oil, and the greater the deviation and error that may be generated.

[0054] According to the difference between the electromagnetic wave data at all acquisition moments in the monitoring period and the corresponding change trend of the fluid flow rate, the influence degree of the fluid flow rate of the crude oil to be tested in the monitoring period is determined.

[0055] Arrange the electromagnetic wave data at all acquisition times within the monitoring period in the order of the acquisition times to obtain an electromagnetic wave data sequence. Arrange the fluid flow rates at all acquisition times within the monitoring period in the order of the acquisition times to obtain a fluid flow rate sequence.

[0056] As an embodiment of the present application, the absolute value of the similarity between the electromagnetic wave data sequence and the fluid flow rate sequence is recorded as the fluid flow rate influence of the crude oil to be detected in the monitoring time period.

[0057] It should be noted that before calculating the similarity of the electromagnetic wave data sequence and the fluid flow rate sequence, the Z-Score standard normalization method is used to perform dimension removal processing on the electromagnetic wave data and the fluid flow rate, respectively. Among them, the use of the Z-Score standard normalization method for dimension removal is a well-known technology and will not be repeated here. In actual application, the implementer can use other methods such as the existing technology of the maximum and minimum value normalization method for dimension removal, which is not limited here.

[0058] Preferably, the similarity between the electromagnetic wave data sequence and the fluid flow velocity sequence can be cosine similarity. As other implementation methods, on the basis of achieving the purpose of measuring the similarity between the electromagnetic wave data sequence and the fluid flow velocity sequence, the implementer can adopt other methods in the prior art such as the Pearson correlation coefficient to obtain the similarity between the electromagnetic wave data sequence and the fluid flow velocity sequence, and this application does not impose any special restrictions.

[0059] When the influence of the fluid flow rate of the crude oil to be detected in the monitoring time period is greater, the similarity between the electromagnetic wave data sequence and the fluid flow rate sequence is greater, and during the monitoring time period, the electromagnetic wave data is more affected by the fluid flow of the crude oil to be detected.

[0060] The fluid flow interference degree of the crude oil to be tested during the monitoring period is determined according to the fluid fluidity and fluid flow velocity influence of the crude oil to be tested during the monitoring period.

[0061] Preferably, as an embodiment of the present application, the ratio of the fluid fluidity of the crude oil to be tested in the monitoring time period to the fluid flow velocity influence is recorded as the fluid flow interference degree of the crude oil to be tested in the monitoring time period.

[0062] When the fluid fluidity of the crude oil to be tested during the monitoring time period is greater and the influence of the fluid flow rate is smaller, the fluid flow interference of the crude oil to be tested during the monitoring time period is greater. At this time, during the monitoring time period, the electromagnetic wave data is more affected by the fluid flow of the crude oil to be tested, the possibility of deviation and error in the measurement result of the water content of the crude oil is greater, and the deviation and error that may be generated are greater.

[0063] At this point, the fluid flow interference degree of the crude oil to be tested during the monitoring period is determined. The flow chart for obtaining the fluid flow interference degree is as follows: Figure 2 shown.

[0064] Step S003: Determine the electromagnetic wave attenuation evaluation value of the crude oil to be tested in the monitoring time period according to the change of the electromagnetic wave data at adjacent collection times in the monitoring time period and the disorder of the electromagnetic wave data at all collection times in the monitoring time period.

[0065] Since water has a higher dielectric constant and stronger conductivity than crude oil, crude oil with a higher water content will absorb electromagnetic waves more strongly, causing the collected electromagnetic wave data to show a significant attenuation trend. Therefore, it is necessary to analyze the attenuation trend of the electromagnetic wave data at different collection times during the monitoring period.

[0066] The electromagnetic wave attenuation evaluation value of the crude oil to be tested in the monitoring time period is determined according to the ratio of the electromagnetic wave data at adjacent collection times in the monitoring time period and the disorder of the electromagnetic wave data at all collection times in the monitoring time period.

[0067] Preferably, as an embodiment of the present application, any collection time within the monitoring time period is recorded as the target collection time, the ratio of the electromagnetic wave data at the target collection time to the next adjacent collection time of the target collection time is recorded as the electromagnetic wave data attenuation rate at the target collection time, and the average of the electromagnetic wave data attenuation rates at all collection times within the monitoring time period is recorded as the average electromagnetic wave data attenuation rate during the monitoring time period. The normalized value of the product of the variance of the electromagnetic wave data at all collection times within the monitoring time period and the average electromagnetic wave data attenuation rate during the monitoring time period is recorded as the electromagnetic wave attenuation evaluation value of the crude oil to be tested during the monitoring time period.

[0068] It can be understood that the last acquisition moment in the monitoring time period does not have a next adjacent acquisition moment, so the attenuation rate of the electromagnetic wave data at the last acquisition moment in the monitoring time period is not calculated, so as to ensure that the calculation of the electromagnetic wave attenuation evaluation value of the crude oil to be tested in the monitoring time period is meaningful; this embodiment uses the Z-Score standard normalization method to calculate the normalized value. In actual application, the implementer can use other methods of the prior art such as the maximum and minimum value normalization method, the sigmoid function, etc. to calculate the normalized value, which is not limited here.

[0069] When the electromagnetic wave data at the target collection moment within the monitoring time period is larger than the electromagnetic wave data at the next adjacent collection moment of the target collection moment, and the difference between the electromagnetic wave data at all collection moments within the monitoring time period is larger, the electromagnetic wave attenuation evaluation value of the crude oil to be tested in the monitoring time period is larger, and at this time, the water content in the crude oil to be tested is higher.

[0070] At this point, the electromagnetic wave attenuation evaluation value of the crude oil to be tested during the monitoring period is obtained.

[0071] Step S004: determine the influence of the water content of the crude oil to be detected during the monitoring period according to the difference between the electromagnetic wave data and the temperature corresponding to the change trend at all acquisition moments during the monitoring period, and the fluid flow interference degree of the crude oil to be detected during the monitoring period, and obtain the water content detection result of the crude oil to be detected according to the electromagnetic wave attenuation evaluation value and the water content influence degree of the crude oil to be detected during the monitoring period.

[0072] Furthermore, in order to improve the accuracy of the evaluation of the water content in the crude oil to be tested, the authenticity of the evaluation of the water content in the crude oil to be tested is further verified.

[0073] The propagation of electromagnetic waves in the crude oil to be tested is closely related to the dielectric constant and conductivity of the crude oil to be tested. Specifically: the dielectric constant of water is much higher than that of oil, so an increase in water content will cause the dielectric constant to change, affecting the attenuation of electromagnetic waves; an increase in temperature will usually cause the dielectric constant to decrease, and at the same time, increase the conductivity of the fluid.

[0074] The influence of water content of the crude oil to be tested during the monitoring period is determined based on the difference between the change trends of the electromagnetic wave data and the temperature at all acquisition moments during the monitoring period and the fluid flow interference of the crude oil to be tested during the monitoring period.

[0075] The temperatures of all the acquisition moments in the monitoring time period are arranged in the order of the acquisition moments to obtain the temperature sequence. The absolute value of the similarity between the electromagnetic wave data sequence and the temperature sequence is recorded as the electromagnetic wave attenuation authenticity of the crude oil to be tested in the monitoring time period.

[0076] It should be noted that before calculating the similarity of the electromagnetic wave data sequence and the temperature sequence, the Z-Score standard normalization method is used to perform dimension removal processing on the electromagnetic wave data and the temperature respectively. Among them, the use of the Z-Score standard normalization method for dimension removal is a well-known technology and will not be repeated here. In actual application, the implementer can use other methods such as the existing technology of the maximum and minimum value normalization method for dimension removal, which is not limited here.

[0077] Preferably, the similarity between the electromagnetic wave data sequence and the temperature sequence can be cosine similarity. As other implementation methods, on the basis of achieving the purpose of measuring the similarity between the electromagnetic wave data sequence and the temperature sequence, the implementer can adopt other methods in the prior art such as the Pearson correlation coefficient to obtain the similarity between the electromagnetic wave data sequence and the temperature sequence, and this application does not impose any special restrictions.

[0078] When the water in the crude oil to be tested absorbs electromagnetic waves to generate heat, the temperature of the crude oil to be tested gradually rises, and the electromagnetic wave data collected using the crude oil to be tested as a medium gradually decreases. The electromagnetic wave data sequence and the temperature sequence are negatively correlated. The greater the absolute value of the similarity between the electromagnetic wave data sequence and the temperature sequence, the greater the authenticity of the electromagnetic wave attenuation of the crude oil to be tested during the monitoring time period.

[0079] Preferably, as an embodiment of the present application, the ratio of the electromagnetic wave attenuation authenticity of the crude oil to be detected during the monitoring period to the fluid flow interference is recorded as the water content influence of the crude oil to be detected during the monitoring period.

[0080] The greater the authenticity of the electromagnetic wave attenuation of the crude oil to be tested during the monitoring period and the smaller the fluid flow interference, the greater the influence of the water content of the crude oil to be tested during the monitoring period. At this time, the authenticity of the electromagnetic wave attenuation phenomenon caused by the change in dielectric constant caused by the high water content in the crude oil to be tested is higher.

[0081] The normalized value of the sum of the electromagnetic wave attenuation evaluation value and the square of the water content influence degree of the crude oil to be tested during the monitoring time period is recorded as the first normalized value of the crude oil to be tested during the monitoring time period, and the value of the first normalized value of the crude oil to be tested during the monitoring time period expressed in percentage is recorded as the water content of the crude oil to be tested during the monitoring time period.

[0082] The water content of the crude oil to be tested during the monitoring period is the water content of the crude oil to be tested detected during the monitoring period.

[0083] At this point, the fully automatic detection of water content in crude oil nondestructive testing instrument is completed.

[0084] 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 principles of the present invention should be included in the protection scope of the present invention.

Claims

1. The fully automatic detection method of water content of crude oil nondestructive testing instrument is characterized by: The method comprises the following steps: Collect electromagnetic wave data, fluid flow rate and temperature of the crude oil to be tested at different collection times within a preset monitoring time period; According to the difference of fluid flow rate of the crude oil to be detected at different collection moments within the monitoring time period, the fluid fluidity of the crude oil to be detected in the monitoring time period is determined, the electromagnetic wave data of all collection moments within the monitoring time period are arranged in the order of the collection moments to obtain the electromagnetic wave data sequence, the fluid flow rate of all collection moments within the monitoring time period is arranged in the order of the collection moments to obtain the fluid flow rate sequence, and according to the similarity of the change trend of the electromagnetic wave data sequence and the fluid flow rate sequence, as well as the fluid fluidity of the crude oil to be detected in the monitoring time period, the fluid flow interference degree of the crude oil to be detected in the monitoring time period is determined; According to the change of electromagnetic wave data at adjacent collection times within the monitoring time period and the disorder of electromagnetic wave data at all collection times within the monitoring time period, the electromagnetic wave attenuation evaluation value of the crude oil to be tested within the monitoring time period is determined; The temperatures of all the acquisition moments in the monitoring time period are arranged in the order of the acquisition moments to obtain a temperature sequence, and the absolute value of the similarity between the electromagnetic wave data sequence and the temperature sequence is recorded as the electromagnetic wave attenuation authenticity of the crude oil to be tested in the monitoring time period, and the water content influence of the crude oil to be tested in the monitoring time period is obtained according to the electromagnetic wave attenuation authenticity and fluid flow interference of the crude oil to be tested in the monitoring time period; The water content detection result of the crude oil to be detected is obtained according to the electromagnetic wave attenuation evaluation value and the water content influence degree of the crude oil to be detected in the monitoring time period.

2. The fully automatic detection method for water content of crude oil nondestructive testing instrument according to claim 1 is characterized in that: The specific method for determining the fluidity of the crude oil to be tested during the monitoring period is: The absolute value of the difference between the fluid flow rates of the crude oil to be tested at two different collection times within the monitoring time period is recorded as the fluid flow rate difference at the two different collection times, and the average value of the fluid flow rate differences at all different collection times within the monitoring time period is recorded as the fluid fluidity of the crude oil to be tested during the monitoring time period.

3. The fully automatic detection method for water content of crude oil nondestructive testing instrument according to claim 1 is characterized in that: The specific method of determining the fluid flow interference degree of the crude oil to be detected during the monitoring period according to the similarity between the change trends of the electromagnetic wave data sequence and the fluid flow rate sequence and the fluid fluidity of the crude oil to be detected during the monitoring period is as follows: The absolute value of the similarity between the electromagnetic wave data sequence and the fluid flow rate sequence is recorded as the fluid flow rate influence of the crude oil to be tested in the monitoring time period; The fluid flow interference degree of the crude oil to be tested during the monitoring period is determined according to the fluid fluidity and fluid flow velocity influence of the crude oil to be tested during the monitoring period.

4. The fully automatic detection method for water content of crude oil nondestructive testing instrument according to claim 3 is characterized in that: The specific method of determining the fluid flow interference degree of the crude oil to be detected during the monitoring period according to the fluid fluidity and fluid flow velocity influence of the crude oil to be detected during the monitoring period is as follows: The ratio of the fluid fluidity of the crude oil to be tested in the monitoring period to the fluid velocity influence is recorded as the fluid flow interference degree of the crude oil to be tested in the monitoring period.

5. The fully automatic detection method for water content of crude oil nondestructive testing instrument according to claim 1 is characterized in that: The specific method for obtaining the electromagnetic wave attenuation evaluation value of the crude oil to be tested during the monitoring period is: Any collection time in the monitoring time period is recorded as the target collection time, and the ratio of the electromagnetic wave data at the target collection time to the next adjacent collection time of the target collection time is recorded as the electromagnetic wave data attenuation rate at the target collection time; The electromagnetic wave attenuation evaluation value of the crude oil to be tested in the monitoring time period is determined according to the attenuation rate of the electromagnetic wave data at all collection moments in the monitoring time period and the disorder degree of the electromagnetic wave data at all collection moments in the monitoring time period.

6. The fully automatic detection method for water content of crude oil nondestructive testing instrument according to claim 5 is characterized in that: The method of determining the electromagnetic wave attenuation evaluation value of the crude oil to be tested in the monitoring time period according to the attenuation rate of the electromagnetic wave data at all acquisition moments in the monitoring time period and the disorder degree of the electromagnetic wave data at all acquisition moments in the monitoring time period includes the following specific methods: The average attenuation rate of the electromagnetic wave data at all acquisition moments in the monitoring period is recorded as the average attenuation rate of the electromagnetic wave data in the monitoring period; The normalized value of the product of the variance of the electromagnetic wave data at all acquisition moments in the monitoring period and the average attenuation rate of the electromagnetic wave data in the monitoring period is recorded as the electromagnetic wave attenuation evaluation value of the crude oil to be tested in the monitoring period.

7. The fully automatic detection method for water content of crude oil nondestructive testing instrument according to claim 1 is characterized in that: The specific method of obtaining the influence of water content of the crude oil to be tested in the monitoring time period according to the authenticity of electromagnetic wave attenuation and fluid flow interference of the crude oil to be tested in the monitoring time period includes: The ratio of the electromagnetic wave attenuation authenticity of the crude oil to be tested during the monitoring period to the fluid flow interference is recorded as the water content influence of the crude oil to be tested during the monitoring period.

8. The fully automatic detection method for water content of crude oil nondestructive testing instrument according to claim 1 is characterized in that: The specific method of obtaining the water content detection result of the crude oil to be detected according to the electromagnetic wave attenuation evaluation value and the water content influence degree of the crude oil to be detected in the monitoring time period includes: The normalized value of the sum of the square of the electromagnetic wave attenuation evaluation value and the water content influence degree of the crude oil to be tested in the monitoring time period is recorded as the first normalized value of the crude oil to be tested in the monitoring time period; The first normalized value of the crude oil to be tested in the monitoring time period is expressed in percentage as a water content test result of the crude oil to be tested.

Images