CN111220646A - Liquid interface sensing detection method and device - Google Patents
Liquid interface sensing detection method and device Download PDFInfo
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- CN111220646A CN111220646A CN202010061176.3A CN202010061176A CN111220646A CN 111220646 A CN111220646 A CN 111220646A CN 202010061176 A CN202010061176 A CN 202010061176A CN 111220646 A CN111220646 A CN 111220646A
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Abstract
The invention relates to a liquid interface sensing detection method and a device, which are suitable for detecting the interface position of more than two kinds of liquid in the same cavity in the depth direction, and comprise the following contents: operating the same heating source to act on the liquid in the cavity to change the temperature of the liquid; when the temperature of the liquid changes, continuously detecting to obtain dynamic temperature information of a plurality of different depth positions of the liquid in a specific time period; the obtained dynamic temperature information is analyzed and processed to obtain different positions of the liquid temperature change rule, so as to position the interface of each liquid. The detection and acquisition of the temperature information can be obtained through a distributed optical fiber system, the distributed optical fiber temperature sensor has the characteristics of high resolution, high sampling rate, high precision and the like, and related data can be obtained without manual intervention, so that the labor cost is saved, and the cost of the cavity is reduced.
Description
Technical Field
The invention relates to identification of a liquid interface, in particular to identification of an oil-water interface in a gas storage solution cavity.
Background
The construction of gas storage is brought with the proposition of strategic energy storage system, the energy storage in China starts late, the foundation is poor, and the construction and research of the gas storage have a great gap with developed countries such as the west. The application of the measuring device in the gas storage construction process has important significance on the field actual measurement technology, is beneficial to accurately calculating the oil-water interface of the dissolved cavity, increases the safety of the large-scale dissolved cavity, particularly the reverse circulation dissolved cavity construction of the rock salt gas storage, and reduces the cost of the dissolved cavity of the gas storage, however, the existing mode for identifying the oil-water interface is complex in structure and high in cost.
Disclosure of Invention
One technical problem solved by one aspect of the present disclosure is to provide an improved liquid interface sensing detection method, and an apparatus capable of implementing the method.
The technical scheme adopted by the invention for solving the technical problems is as follows: the liquid interface sensing detection method is suitable for detecting the interface position of more than two kinds of liquid in the same cavity in the depth direction, and comprises the following steps:
the temperature change part is used for operating the same heating source to act on the liquid in the cavity so as to change the temperature of the liquid;
the detection part is used for continuously detecting to acquire dynamic temperature information of a plurality of different depth positions of the liquid in a specific time period when the temperature of the liquid changes;
and the analysis positioning part analyzes and processes the obtained dynamic temperature information to obtain different positions of the liquid temperature change rule, so as to position the interface of each liquid.
In the liquid interface sensing detection method, the specific time period is an interval in which the liquid falls back to normal temperature after being heated to a preset value.
According to the liquid interface sensing detection method, the temperature information is acquired by adopting a distributed optical fiber temperature measurement technology in the detection part.
According to the liquid interface sensing detection method, the cavity is a gas storage dissolving cavity, and liquid in the dissolving cavity comprises water at the lower layer and diesel oil at the upper layer.
The liquid interface sensing detection device is suitable for detecting the interface position of more than two kinds of liquid in the same cavity in the depth direction, and comprises,
a heating member having a length to extend into the cavity to heat the liquid;
the temperature control component is connected with the heating component;
the temperature detection assembly comprises an information detection carrier and a host part, wherein the information detection carrier has a certain length so as to extend into the cavity, and the host part acquires dynamic temperature information of the corresponding depth position of the liquid under the influence of the heating part through the information detection carrier and transmits the dynamic temperature information;
the host computer assembly is connected with the temperature control component to send an operation instruction of the heating component; and the temperature detection component is connected with the liquid interface and is used for receiving and processing the dynamic temperature information so as to identify and position the liquid interface according to the different positions of the temperature change rule.
The liquid interface sensing detection device as described above, wherein the heating component comprises a heating cable, and the temperature control component comprises a temperature control meter.
The liquid interface sensing detection device comprises a host part and an information detection carrier, wherein the host part comprises a distributed optical fiber temperature measurement host.
The liquid interface sensing detection device as described above, wherein the heating cable and the armored optical cable are both used for extending to the partial parallel layout in the cavity.
One advantageous effect brought by one aspect of the present disclosure: by detecting the temperature change of different positions of the liquid, the different positions of the temperature change rule can be analyzed from the acquired temperature information due to the fact that the specific heat capacities of different liquids are different, and the positions are interfaces of the liquid. The scheme is applied to the construction of the gas storage, can accurately identify the interface of oil and water in the cavity, is easy to operate and realize, and is beneficial to improving the working efficiency and reducing the construction cost.
Drawings
Certain embodiments of the invention will now be described in detail, by way of example and not limitation, with reference to the figures, wherein like reference numerals identify identical or similar elements or portions. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale.
In the drawings:
FIG. 1 is a schematic diagram of the operation of the apparatus of the present invention;
the designations in the figures illustrate the following:
101. a diesel pipeline; 102. a ground surface; 103. diesel oil; 104. water; 105. an inner water conduit; 106. an interlayer water pipeline; 107. an armored optical cable; 108. a heating cable; 109. a distributed optical fiber temperature measurement host; 110. and (4) a temperature control meter.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments.
All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs.
The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a," "an," or "the" and similar referents do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
The body-building gas storage is formed by artificially dissolving a cavity in a proper stratum, halogen is generally dissolved by hot water 104 in the cavity dissolving process, so that a cavity hole is formed, in order to avoid upward dissolution in the process, an oil seal is needed on the upper surface of the hot water 104, and the use amount of oil is saved after the interface of diesel oil 103 and water 104 is obtained.
The invention provides a liquid interface sensing detection method, which is suitable for detecting the interface position of more than two kinds of liquid in the same cavity in the depth direction, and comprises the following steps:
the temperature change part is used for operating the same heating source to act on the liquid in the cavity so as to change the temperature of the liquid; the detection part is used for continuously detecting to acquire dynamic temperature information of a plurality of different depth positions of the liquid in a specific time period when the temperature of the liquid changes; and the analysis positioning part analyzes and processes the obtained dynamic temperature information to obtain different positions of the liquid temperature change rule so as to position the interface of each liquid.
Taking the gas storage dissolving cavity as an example, the diesel oil 103 and the water 104 in the dissolving cavity are heated by the heating source, and the heating source is stopped after the diesel oil is heated to a preset temperature, so that the temperature of the oil 104 and the water 104 falls back to a normal temperature state. In the process, dynamic temperature information of a plurality of positions with different depths is obtained through detection, a temperature rising curve or a temperature reducing curve which can show the liquid temperature change rule can be formed through analysis and processing, because the specific heat capacities of the oil and the water 104 are different, the temperature rising curve and the temperature reducing curve of the oil and the water are different, and the position where the difference is generated corresponds to the interface of the oil and the water 104.
Specifically, when the temperature change rule is obtained, only the dynamic temperature information within a certain specific time can be used, for example, the temperature data within the time period of the oil and water 104 falling to the normal temperature after being heated to the preset value is analyzed and processed to obtain different cooling curves, and the difference boundary of the cooling curves corresponds to the interface of the oil and water 104.
Acquiring liquid for detection that lasts for a certain period of timeThe dynamic temperature information of different depth positions can be realized by adopting a distributed optical fiber temperature measurement technology. Distributed optical fiber thermometry (DTS) technique also known asOptical fiber temperature measurementTemperature monitoring is realized according to the sensitivity of the optical time domain reflection principle and the Raman scattering effect to temperature, and temperature information corresponding to different depth positions can be continuously obtained in real time.
The invention provides a liquid interface sensing detection device capable of realizing the method, which is suitable for detecting the interface position of more than two kinds of liquid in the same cavity in the depth direction and comprises the following components:
a heating member having a length to extend into the cavity to heat the liquid;
the temperature control component is connected with the heating component;
the temperature detection assembly comprises an information detection carrier and a host part, the information detection carrier has a certain length and extends into the cavity (in the liquid), and the host part acquires dynamic temperature information of the corresponding depth position of the liquid under the influence of the heating part through the information detection carrier and transmits the dynamic temperature information;
the industrial control device is connected with the temperature control component to send an operation instruction of the heating component; and the temperature detection component is connected with the liquid interface and is used for receiving and processing the dynamic temperature information so as to identify and position the liquid interface according to different positions of the temperature change rule.
Specifically, the heating part adopts a heating cable 108, the temperature control part is a temperature control meter 110, and the temperature control meter 110 is connected with the heating cable 108; the detection of the continuous rule of the liquid at different depth positions can be realized by adopting a distributed optical fiber temperature measuring device, the information detection carrier comprises an armored optical cable 107 (the optical cable is coated with protective armor, so that the fiber core in the armored optical cable is protected, and the armored optical cable has the functions of resisting strong pressure, stretching, high temperature and the like), the armored optical cable 107 is a sensing component capable of continuously monitoring, the monitoring precision can be selected according to specific requirements, such as 1 meter or 0.5 meter, the host part comprises a distributed optical fiber temperature measurement host 109 connected with the head end of the armored optical cable 107, a temperature control meter 110 and the control end of the distributed optical fiber temperature measurement host 109 are connected to an industrial computer (namely an industrial control device), the industrial computer is provided with an MATLAB system, the data can be processed to obtain the temperature change rule of the oil and water 104, and the temperature change rule is generally marked by a temperature rise curve and a temperature drop curve, so that the interface of the oil and water 104 in the gas storage dissolving cavity is judged.
Referring to fig. 1, a high-precision distributed optical fiber temperature measuring device is configured for a gas storage, and an armored optical cable 107 connected with a distributed optical fiber temperature measuring host 109 and a heating cable 108 connected with a temperature control meter 110 extend from the ground 102 to the bottom of the gas storage through a diesel oil pipeline 101.
And after all the temperature is ready, the high-precision distributed optical fiber temperature measurement host 109 is opened, and the temperature at different depth positions is ready to be measured and data is recorded. The sandwich water pipe 106 is filled with water 104, and simultaneously, a certain amount of diesel oil 103 is filled into the diesel oil 103 pipe. When water 104 is injected into a certain amount, brine 104 starts to be sprayed out of the inner water pipeline 105, which is the cavity effect, and if no distributed optical fiber temperature measuring device is available, the position of the interface of oil and water 104 cannot be known. At this time, the industrial computer sends an instruction to electrify the temperature control meter 110, the heating cable 108 starts to work, and the liquid in the gas storage starts to be heated, because the specific heat capacities of the oil and the water 104 are different and the heat conductivity coefficients are different, the oil and the water do not need different temperature change laws. When the temperature rises to a certain value, the power supply of the temperature control meter 110 is cut off, the temperature in the gas storage starts to fall, and the oil and water 104 is slowly cooled to the normal temperature.
In the foregoing process, the distributed optical fiber temperature measurement host 109 obtains the dynamic temperature data of the oil and water 104 at the corresponding depth positions in the corresponding time periods through the armored optical cable 107, the temperature data corresponding to the corresponding depth positions are uploaded to an industrial computer through an ethernet interface of the host, the temperature rise curves and the temperature drop curves of the oil and water 104 can be obtained through the MATLAB data processing in a grading manner, the temperature change curves of the oil and water 104 are greatly different due to the difference of specific heat capacities, and the position where the difference occurs is the interface of the oil and water 104.
When putting armoured optical cable 107, heating cable 108 into the gas storage storehouse, will be favorable to practicing thrift the energy consumption with both parallel layouts, both parts that stretch into in the gas storage storehouse can be bound parallelly promptly, armoured optical cable 107 is close with heating cable 108 distance, can be more quick detect the temperature variation that near heating cable 108 near liquid takes place, avoid needing heating cable 108 large tracts of land, carry out heating work to the oil of large size, water 104 for a long time, can avoid the energy waste from this. Generally, after the temperature is raised to a certain predetermined temperature, the operation of the heating cable 108 may be stopped, the cooling process may be detected and analyzed, and the position of the interface of the oil-water 104 may be determined according to the difference position of the cooling curve.
The method and the device for detecting the oil-water interface of the gas storage have the characteristics of high resolution, high sampling rate, high precision and the like, and related data can be obtained without manual intervention, so that the labor cost is saved, and the cavity dissolving cost is reduced.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention, as it will be apparent to those skilled in the art that various modifications, combinations and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (8)
1. The liquid interface sensing detection method is suitable for detecting the interface position of more than two kinds of liquid in the same cavity in the depth direction, and is characterized in that: the method comprises the following steps:
the temperature change part is used for operating the same heating source to act on the liquid in the cavity so as to change the temperature of the liquid;
the detection part is used for continuously detecting to acquire dynamic temperature information of a plurality of different depth positions of the liquid in a specific time period when the temperature of the liquid changes;
and the analysis positioning part analyzes and processes the obtained dynamic temperature information to obtain different positions of the liquid temperature change rule, so as to position the interface of each liquid.
2. The liquid interface sensing detection method of claim 1, wherein: the specific time period is an interval that the liquid falls back to the normal temperature after being heated to a preset value.
3. The liquid interface sensing detection method of claim 1, wherein: and the detection part adopts a distributed optical fiber temperature measurement technology to realize the acquisition of the dynamic temperature information.
4. The liquid interface sensing detection method of claim 1, wherein: the cavity is a gas storage dissolving cavity, and liquid in the dissolving cavity comprises water on the lower layer and diesel oil on the upper layer.
5. Liquid interface sensing detection device, its interface position that is applicable to two kinds of above liquid in the detection same cavity in the depth direction, its characterized in that: the device comprises a plurality of devices which are connected with each other,
a heating member having a length to extend into the cavity to heat the liquid;
the temperature control component is connected with the heating component;
the temperature detection assembly comprises an information detection carrier and a host part, wherein the information detection carrier has a certain length so as to extend into the cavity, and the host part acquires dynamic temperature information of the corresponding depth position of the liquid under the influence of the heating part through the information detection carrier and transmits the dynamic temperature information;
the industrial control device is connected with the temperature control component to send an operation instruction of the heating component; and the temperature detection component is connected with the liquid interface and is used for receiving and processing the dynamic temperature information so as to identify and position the liquid interface according to the different positions of the temperature change rule.
6. The liquid interface sensing probe of claim 5, wherein: the heating part comprises a heating cable, and the temperature control part comprises a temperature control meter.
7. The liquid interface sensing probe of claim 6, wherein: the information detection carrier comprises an armored optical cable, and the host part comprises a distributed optical fiber temperature measurement host.
8. The liquid interface sensing probe of claim 7, wherein: the heating cable and the armored optical cable are both used for extending to the partial parallel layout in the cavity.
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Application publication date: 20200602 |