CN115711862A - Device for measuring water content of crude oil by near-infrared light - Google Patents
Device for measuring water content of crude oil by near-infrared light Download PDFInfo
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- CN115711862A CN115711862A CN202211592188.4A CN202211592188A CN115711862A CN 115711862 A CN115711862 A CN 115711862A CN 202211592188 A CN202211592188 A CN 202211592188A CN 115711862 A CN115711862 A CN 115711862A
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Abstract
The invention discloses a device for measuring the water content of crude oil by near-infrared light, which comprises: the A data channel is used for measuring the infrared spectrum absorption capacity of the crude oil and the water in the emulsion obtained by adjusting the flow pattern of the crude oil through the flow pattern adjuster to obtain two paths of photoelectric signals, and the data converted from the two paths of photoelectric signals are transmitted to the common water content solving module; and the B data channel is used for identifying and detecting gas in the crude oil emulsion to obtain one path of photoelectric signal, and the converted data of the one path of photoelectric signal is transmitted to the common water content solving module. When the crude oil pipeline contains gas, the method adds the independent gas measuring channel, corrects the originally calculated water content, and calculates the water content of the crude oil which is not interfered by the gas, so that the accuracy of measuring the water content of the crude oil is improved.
Description
Technical Field
The invention relates to the technical field of measurement of water content in crude oil, in particular to a device for measuring the water content of the crude oil through near-infrared light.
Background
The water content is a key data in oil exploitation, transportation and oil product transaction. The online measurement of the water content has important significance on the digital oil field construction such as oil well water outlet, crude oil yield estimation, oil well development life prediction, oil well state detection, water injection operation and the like. The water content of domestic oil fields is mostly measured by adopting an artificial sampling measurement method. The method depends heavily on the representativeness of sampling points and the reliability of manual operation, has low measurement result precision, wastes time and labor, and can not meet the requirements of oil field digital transformation. Although there are also many automatic instruments for detecting crude oil water content instrument in the market, there are about 20 kinds including ray method, resistivity method, capacitance method, microwave method, radio frequency method, etc., in the actual use process of oil field, because of the influence of environment-friendly or bad and complex working conditions, such as emulsion, mineralization, etc., the measurement precision is low, especially under the condition of gas, the measurement precision is greatly reduced, and the crude oil water content can not be accurately measured.
Disclosure of Invention
The invention provides a system and a method for measuring the water content of crude oil by using near-infrared light and an infrared water content instrument, aiming at solving the technical problems that: and the accuracy of measuring the water content in the crude oil is improved.
In view of the above problems of the prior art, according to one aspect of the present disclosure, the following technical solutions are adopted in the present invention:
a device for near-infrared optical measurement of water content of crude oil comprises:
the data channel A is used for measuring the infrared spectrum absorption capacity of the crude oil and the water in the emulsion obtained by adjusting the flow pattern of the crude oil through the flow pattern adjuster to obtain two paths of photoelectric signals, and the converted data of the two paths of photoelectric signals are transmitted to the common water content solving module;
the data channel B is used for identifying and detecting gas in the crude oil emulsion to obtain a path of photoelectric signal, and the data converted from the path of photoelectric signal is transmitted to the common water content solving module;
and the common water content solving module is used for performing regression calculation according to the data of the infrared spectrum absorption amount of the crude oil and the water measured by the data channel A to obtain the water content of the crude oil, and correcting the water content of the crude oil through the data of identifying and detecting the gas by the data channel B to obtain the corrected water content of the crude oil.
Further, the flow pattern regulator is a U-shaped pipe, a blind tee, a pump or a mixer.
Further, the mode of correcting the water content by the common water content solving module comprises:
presetting a threshold value for comparison;
comparing the water content obtained by the solution of the ordinary water content solving module with the threshold value;
if the water content obtained by solving is within the threshold value, generating a correction factor according to the water content obtained by solving and a preset threshold value;
and if the water content obtained by solving is out of the threshold value, the gas content is over the working condition of the instrument.
Further, the optical measurement window is provided with a heating rod.
The invention can also be:
a device for near-infrared optical measurement of water content of crude oil comprises:
the data channel C is used for measuring the infrared spectrum absorption capacity of water in the emulsion obtained by adjusting the flow pattern of the crude oil through the flow pattern adjuster to obtain a path of photoelectric signal, and data converted from the path of photoelectric signal is transmitted to the ultralow moisture content solving module;
the D data channel is used for measuring the infrared spectrum absorption capacity of the crude oil in the emulsion obtained by adjusting the flow pattern of the crude oil through the flow pattern adjuster to obtain a path of photoelectric signal, and data converted from the path of photoelectric signal is transmitted to the ultralow moisture content solving module;
and the ultralow water content solving module is used for performing regression calculation according to the infrared spectrum absorption data of the crude oil and the water of the C data channel and the D data channel to obtain the water content in the crude oil.
Compared with the prior art, one of the beneficial effects of the invention is that:
according to the system and the method for measuring the water content of the crude oil by using the near-infrared light and the infrared water content instrument, when the crude oil in an oil pipeline contains gas, adverse effects are brought to the measurement of the water content.
The invention utilizes the ubiquitous characteristic of crude oil emulsion in oil pipelines, compared with bubble flow, slug flow, laminar flow and the like which pass through a water content measuring instrument, the measured water content is not representative due to uneven mixing of two-phase or three-phase media, and through tests, the invention utilizes the ubiquitous characteristic of emulsion in oil pipelines of oil fields, can be installed in a U-shaped pipe mode during actual installation, and can ensure that the instrument has high measuring precision in the emulsion environment of full pipe flow.
According to the invention, the heating rod with temperature feedback is arranged in the optical measurement window, so that a flexible heating control method can be carried out on the probe, the temperature of the measurement window is ensured to be in a proper interval, and the condensation point of wax and the deposition temperature of mineral substances are avoided. The influence of wax precipitation and scaling on the measurement precision is effectively avoided.
Drawings
For a clearer explanation of the embodiments or technical solutions in the prior art of the present application, the drawings used in the description of the embodiments or prior art will be briefly described below, it is obvious that the drawings in the following description are only references to some embodiments in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a block diagram of a conventional system for measuring crude oil water cut using near infrared light according to one embodiment of the present invention.
FIG. 2 is a block diagram of an ultra-low profile system for measuring crude oil water cut using near infrared light according to one embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited thereto.
The crude oil is irradiated by near infrared light, because the crude oil and water selectively absorb near infrared light with different frequencies, the near infrared light passing through a sample can be weakened in a certain wavelength range, the transmitted infrared light carries information of organic matter components and structures, the signal intensity of the transmitted light with different wavelengths is analyzed by a detector, the content of the water in the crude oil can be determined, the measurement accuracy of the water content in the crude oil can be greatly improved due to uniform distribution of emulsion, and the method is more suitable for real-time crude oil emulsion measurement. The scheme is specifically adopted as follows:
referring to FIG. 1, FIG. 1 shows a block diagram of a water meter system of the general type, specifically:
a device for near-infrared optical measurement of water content of crude oil comprises:
the data channel A is used for measuring the infrared spectrum absorption capacity of the crude oil and the water in the emulsion obtained by adjusting the flow pattern of the crude oil through the flow pattern adjuster to obtain two paths of photoelectric signals, and the converted data of the two paths of photoelectric signals are transmitted to the common water content solving module;
the data channel B is used for identifying and detecting gas in the crude oil emulsion to obtain a path of photoelectric signal, and the data converted from the path of photoelectric signal is transmitted to the common water content solving module;
and the common water content solving module is used for performing regression calculation according to the data of the infrared spectrum absorption amount of the crude oil and the water measured by the data channel A to obtain the water content of the crude oil, and correcting the water content of the crude oil through the data of identifying and detecting the gas by the data channel B to obtain the corrected water content of the crude oil.
Wherein, the mode that the moisture content is corrected by the common moisture content solving module comprises the following steps:
presetting a threshold value for comparison;
comparing the water content obtained by the solution of the ordinary water content solving module with the threshold value;
if the water content obtained by solving is within the threshold value, generating a correction factor according to the water content obtained by solving and a preset threshold value;
if the water content obtained by solving is out of the threshold value, the gas content exceeds the working condition of the instrument.
Referring to fig. 2, fig. 2 shows a block diagram of an ultra-low type water content instrument system, specifically:
a device for near-infrared optical measurement of water content of crude oil comprises:
the data channel C is used for measuring the infrared spectrum absorption capacity of water in the emulsion obtained by adjusting the flow pattern of the crude oil through the flow pattern adjuster to obtain a path of photoelectric signal, and data converted from the path of photoelectric signal is transmitted to the ultralow moisture content solving module;
the D data channel is used for measuring the infrared spectrum absorption capacity of the crude oil in the emulsion obtained by adjusting the flow pattern of the crude oil through the flow pattern adjuster to obtain a path of photoelectric signal, and the converted data of the path of photoelectric signal is transmitted to the ultralow moisture content solving module;
and the ultralow water content solving module is used for performing regression calculation according to the infrared spectrum absorption data of the crude oil and the water of the C data channel and the D data channel to obtain the water content in the crude oil.
The flow pattern regulator is a U-shaped pipe, a blind tee, a pump or a mixer and is used for ensuring the full pipe flow of crude oil and enabling the measuring probe to be in uniform crude oil emulsion.
In addition, in field measurement, due to the influence of minerals and wax in crude oil, wax precipitation and scaling of a measurement window are easily caused, a heating rod with temperature feedback is arranged in an optical window, a flexible heating control method can be carried out on a probe, the temperature of the window is ensured to be in a proper interval, and the condensation point of the wax and the deposition temperature of the minerals are avoided.
In the data channel for acquisition in the above embodiment, the analog acquisition circuit for specific hardware can acquire corresponding data by using the existing acquisition circuit structure, and therefore, the detailed description of the specific circuit structure is not given in the present invention.
In practical application, because the gas content in the crude oil with very low water content is very low, the precision required by application can be realized without additional elimination and correction of gas content influence, namely the ultra-low water content shown in fig. 2 is adopted.
The data are verified, and the common water content meter is proved to have high measurement accuracy after the elimination and correction of the gas content influence under the condition of high gas content. The specific test data are as follows:
the verification data proves that the ultra-low type moisture meter has very high measurement precision, and the specific test data is as follows:
for the ultra-low moisture content instrument and the ordinary moisture content instrument in the embodiment, if the instruments with two specifications are integrated, the instruments are particularly complex, and the operation and detection measurement accuracy is influenced, so the scheme of the embodiment can be preferably made into 2 types of moisture content measuring instruments, wherein the range of the ultra-low moisture content instrument is 1-3%, the accuracy is less than +/-0.2%, the range of the ordinary moisture content instrument is 0-100%, and the accuracy is less than +/-3%. The two types of water content instruments are used to adapt to different installation environments.
The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
Reference throughout this specification to "one embodiment," "another embodiment," "an embodiment," etc., means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment described generally in this application. The appearances of the same phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the scope of the invention to effect such feature, structure, or characteristic in connection with other embodiments.
Although the invention has been described herein with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure. More specifically, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure and claims of this application. In addition to variations and modifications in the component parts and/or arrangements, other uses will also be apparent to those skilled in the art.
Claims (7)
1. The utility model provides a device of crude oil moisture content is surveyed to near-infrared light which characterized in that includes:
the data channel A is used for measuring the infrared spectrum absorption capacity of the crude oil and the water in the emulsion obtained by adjusting the flow pattern of the crude oil through the flow pattern adjuster to obtain two paths of photoelectric signals, and the converted data of the two paths of photoelectric signals are transmitted to the common water content solving module;
the data channel B is used for identifying and detecting gas in the crude oil emulsion to obtain a path of photoelectric signal, and the data converted from the path of photoelectric signal is transmitted to the common water content solving module;
and the common water content solving module is used for performing regression calculation according to the data of the infrared spectrum absorption amount of the crude oil and the water measured by the data channel A to obtain the water content of the crude oil, and correcting the water content of the crude oil through the data of identifying and detecting the gas by the data channel B to obtain the corrected water content of the crude oil.
2. The device for near-infrared photometric determination of water cut of crude oil as claimed in claim 1, wherein the flow pattern regulator is a U-tube, a blind tee, a pump or a mixer.
3. The near-infrared optical measurement device for the water content of crude oil according to claim 1, wherein the mode of correcting the water content by the common water content solving module comprises:
presetting a threshold value for comparison;
comparing the water content obtained by solving the common water content solving module with the threshold value;
if the water content obtained by solving is within the threshold value, generating a correction factor according to the water content obtained by solving and a preset threshold value;
and if the water content obtained by solving is out of the threshold value, the gas content is over the working condition of the instrument.
4. The near-infrared optical measurement device for water content of crude oil as claimed in claim 1, wherein the optical measurement window is provided with a heating rod.
5. The utility model provides a device of crude oil moisture content is surveyed to near-infrared light which characterized in that includes:
the data channel C is used for measuring the infrared spectrum absorption capacity of water in the emulsion obtained by adjusting the flow pattern of the crude oil through the flow pattern adjuster to obtain a path of photoelectric signal, and data converted from the path of photoelectric signal is transmitted to the ultralow moisture content solving module;
the D data channel is used for measuring the infrared spectrum absorption capacity of the crude oil in the emulsion obtained by adjusting the flow pattern of the crude oil through the flow pattern adjuster to obtain a path of photoelectric signal, and data converted from the path of photoelectric signal is transmitted to the ultralow moisture content solving module;
and the ultralow water content solving module is used for performing regression calculation according to the infrared spectrum absorption data of the crude oil and the water of the C data channel and the D data channel to obtain the water content in the crude oil.
6. The device for near-infrared photometric determination of water cut of crude oil as claimed in claim 5, wherein the flow pattern regulator is a U-tube, a blind tee, a pump or a mixer.
7. The device for measuring the water content of the crude oil in the near-infrared light mode according to claim 5, wherein the optical measurement window is provided with a heating rod.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118090648A (en) * | 2024-04-02 | 2024-05-28 | 常州建昊建筑鉴定检测有限公司 | Method and system for detecting water content of engineering material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118090648A (en) * | 2024-04-02 | 2024-05-28 | 常州建昊建筑鉴定检测有限公司 | Method and system for detecting water content of engineering material |
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