CN106979906B - Single-well crude oil water content online weighing measurement system and method - Google Patents
Single-well crude oil water content online weighing measurement system and method Download PDFInfo
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- CN106979906B CN106979906B CN201710239788.5A CN201710239788A CN106979906B CN 106979906 B CN106979906 B CN 106979906B CN 201710239788 A CN201710239788 A CN 201710239788A CN 106979906 B CN106979906 B CN 106979906B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 85
- 239000010779 crude oil Substances 0.000 title claims abstract description 74
- 238000000034 method Methods 0.000 title claims abstract description 42
- 238000005303 weighing Methods 0.000 title claims abstract description 33
- 238000005259 measurement Methods 0.000 title claims abstract description 17
- 239000007788 liquid Substances 0.000 claims abstract description 99
- 239000003921 oil Substances 0.000 claims abstract description 19
- 238000001914 filtration Methods 0.000 claims abstract description 5
- 239000007787 solid Substances 0.000 claims abstract description 4
- 238000007599 discharging Methods 0.000 claims abstract description 3
- 239000002893 slag Substances 0.000 claims abstract description 3
- 238000004891 communication Methods 0.000 claims description 15
- 238000000926 separation method Methods 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 238000004458 analytical method Methods 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 235000019198 oils Nutrition 0.000 description 11
- 238000001514 detection method Methods 0.000 description 7
- 238000004821 distillation Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 239000003129 oil well Substances 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 235000019476 oil-water mixture Nutrition 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/04—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by removing a component, e.g. by evaporation, and weighing the remainder
- G01N5/045—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by removing a component, e.g. by evaporation, and weighing the remainder for determining moisture content
Abstract
The invention discloses an online weighing measurement system and method for the water content of single-well crude oil, and belongs to the field of measurement engineering. The method for measuring the water content of the crude oil comprises the following steps: filtering crude oil, removing solid slag, exhausting, separating oil from water, and obviously layering a water layer and an oil layer in a funnel-type liquid container; the weighing system weighs the total weight M1 of the liquid in the funnel-shaped liquid container; then discharging the water layer in the funnel-shaped liquid container, and closing the liquid outlet control valve when the liquid level sensing device detects that the oil-water interface is at the outlet of the funnel-shaped liquid container, and weighing the weight M2 of the oil layer liquid by the weighing system; and obtaining the water content of the crude oil from the measured M1 and M2. The invention can greatly improve the analysis speed of the water content of the crude oil, does not cause any waste of the sample oil, and is an effective method and means for realizing the production modernization, the consumption reduction and the benefit increase of the crude oil production enterprises.
Description
Technical Field
The invention relates to the field of measurement engineering, in particular to an online weighing system and method for the water content of single-well crude oil.
Background
The water content of crude oil directly influences the exploitation, dehydration, gathering and transportation, metering, sales and the like of crude oil. Therefore, the detection of the water content of crude oil is required in the process of crude oil production and storage and transportation in oil fields.
The on-line detection of the water content of the crude oil has important significance for determining the water outlet and the oil outlet layer position of the oil well, estimating the yield of the crude oil and predicting the development life of the oil well. Meanwhile, accurate and timely on-line detection data of the water content of crude oil can reflect the working state of an oil well, and the method plays an important role in reducing energy consumption, reducing cost and realizing automatic management of oil fields in management departments.
In the existing crude oil water content measuring method, manual sampling is needed, the hidden danger of unsafe production exists in manual sampling test, and the crude oil is wasted due to repeated sampling; in addition, laboratory test consumes long time, and efficiency is extremely low, can not feed back moisture content information in time, leads to unable timely adjustment production technology, influences production. Moreover, the existing crude oil water content measuring method requires more labor and has high cost.
Disclosure of Invention
In order to overcome the defects of the prior art and solve the problems that the crude oil water content measuring method in the prior art is long in time consumption, more in labor, potential safety hazards exist and crude oil is wasted, the invention provides a single-well crude oil water content online weighing measuring system and method capable of feeding back water content information to crude oil production operation quickly and avoiding any sample oil waste.
The technical scheme of the invention is as follows:
the system comprises a liquid inlet pipeline connected with a crude oil process pipeline, wherein a liquid inlet control valve is arranged on the liquid inlet pipeline; the liquid inlet pipeline is sequentially connected with the filtering device, the exhaust device and the oil-water separation device; the lower end of the oil-water separation device is provided with a funnel-shaped liquid container, and the outside of the funnel-shaped liquid container is provided with a weighing device for weighing liquid in the funnel-shaped liquid container and a liquid level sensing device for detecting liquid levels among different mediums; a liquid outlet control valve is arranged at the outlet of the funnel-shaped liquid container; the funnel-shaped liquid container is communicated with the oil-water mixing container through a liquid outlet pipeline; the oil-water mixing container is communicated with a crude oil process pipeline through a return pipeline.
Preferably, the return line is provided with a reinjection control valve and a return control valve.
Further, the liquid inlet control valve, the reinjection control valve and the backflow control valve comprise a manual valve and an electromagnetic valve.
Further, the weighing device and the liquid level sensing device are communicated with the controller through a communication cable; each electromagnetic valve is connected with the controller.
Further, the controller is connected with a monitoring center computer through a remote communication unit and/or is connected with a field display instrument.
Preferably, the liquid level sensor is an infrared medium liquid level sensor; the controller is a PLC controller or a DSP controller.
The method for measuring the water content of the crude oil by adopting the single-well crude oil water content online weighing and measuring system comprises the following steps: filtering crude oil, removing solid slag, exhausting, separating oil from water, and obviously layering a water layer and an oil layer in a funnel-type liquid container; the weighing system weighs the total weight M1 of the liquid in the funnel-shaped liquid container; then discharging the water layer in the funnel-shaped liquid container, and closing the liquid outlet control valve when the liquid level sensing device detects that the oil-water interface is at the outlet of the funnel-shaped liquid container, and weighing the weight M2 of the oil layer liquid by the weighing system; and obtaining the water content of the crude oil from the measured M1 and M2.
As a preferable scheme, a water layer and an oil layer in the funnel-shaped liquid container respectively enter the oil-water mixing container and flow back to the crude oil process pipeline after being uniformly mixed.
As a preferable scheme, the controller calculates the water content of the crude oil according to the received M1 and M2 data; the obtained crude oil water content data are displayed on an on-site display instrument and/or transmitted to a monitoring center computer.
Preferably, the water content of the crude oil is obtained by taking a weighted average of a plurality of measurements.
The beneficial effects of the invention are as follows:
according to the method for calculating the water content of the crude oil, the oil-water separation technology, the liquid level detection technology and the on-line weighing sensor detection technology are utilized, and the single-well crude oil water content is measured on line through advanced detection on-line weighing and the method for calculating the water content of the crude oil. The method can greatly improve the analysis speed and accuracy of the water content of the crude oil.
In the prior art, oil-water separation is realized by adopting a distillation method and then the water content of crude oil is tested, but the distillation method can not be used for evaporating out a plurality of oil components, so that the error is larger; the on-line measurement adopts distillation method separation to cause the problems of crude oil solidification of an oil container, difficult cleaning of residual viscous crude oil after evaporation, difficult automatic treatment and the like, and is inconvenient for on-line continuous measurement of the water content of crude oil. Moreover, the distillation method is long in time consumption, and also needs to consume a large amount of energy, so that pollution is caused while the energy is consumed. The invention has the advantages of high analysis speed, no need of heating, and most importantly, the accuracy is much higher than that of the distillation method, and according to experiments, the accuracy of the method is 358 percent higher than that of the distillation method for measuring the water content.
Meanwhile, the waste of any sample oil is avoided, and the method and the means for realizing the modernization of the production of crude oil production enterprises, reducing the consumption and increasing the benefit are effective.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a schematic diagram of the structure of the single well crude oil water content online weighing measurement system of the invention.
In the figure, a crude oil process pipeline 1, a liquid inlet manual valve 2, a liquid inlet electromagnetic valve 3, a liquid inlet pipeline 4, a filter 5, an exhaust hole 6, a liquid standing container 7, an oil-water cyclone separator 8, a funnel-shaped liquid containing container 9, a weighing sensor 10, an infrared medium liquid level sensor 11, a serial communication cable 12, a controller 13, a bus communication cable 14, an on-site display instrument 15, a wireless communication module 16, a wireless communication network 17, a monitoring center computer 18, a liquid outlet electromagnetic valve 19, a liquid outlet pipeline 20, an oil-water mixing container 21, a reinjection manual valve 22, a reinjection electromagnetic valve 23, a backflow pipeline 24, a backflow electromagnetic valve 25 and a backflow manual valve 26.
Detailed Description
Example 1
An online weighing and measuring system for the water content of single-well crude oil comprises a liquid inlet pipeline 4 connected with a crude oil process pipeline 1, wherein a liquid inlet manual valve 2 and a liquid inlet electromagnetic valve 3 are arranged on the liquid inlet pipeline 4.
The back of the liquid inlet pipeline 4 is sequentially connected with a filter 5, a liquid standing container 7 with an exhaust hole 6 and an oil-water cyclone separator 8.
A funnel-shaped liquid container 9 is arranged below the oil-water cyclone separator 8. The outer part of the funnel-shaped liquid container 9 is provided with a weighing sensor 10 for weighing the weight of the liquid in the funnel-shaped liquid container 9 and an infrared medium level sensor 11 for detecting the liquid level between different mediums. A liquid outlet electromagnetic valve 19 is arranged at the outlet of the funnel-shaped liquid container 9.
The funnel-shaped liquid container 9 is communicated with an oil-water mixing container 21 through a liquid outlet pipeline 20; the oil-water mixing vessel 21 communicates with the crude oil process line 1 via a return line 24. A reinjection manual valve 22 and a reinjection electromagnetic valve 23 are respectively arranged at one end of the backflow pipeline 24, which is close to the oil-water mixing container 21; the return line 24 is provided with a return solenoid valve 25 and a return manual valve 26 at the end near the crude oil process line 1, respectively.
The weighing sensor 10 and the infrared medium level sensor 11 are communicated with a controller 13 (a PLC controller or a DSP controller) through a serial communication cable 12; each solenoid valve is connected to the controller 13.
The controller 13 is connected to the field display instrument 15 through a bus communication cable 14. The controller 13 is connected with a monitoring center computer 18 through a wireless communication module 16 and a wireless communication network 17.
The process for measuring the water content of the crude oil by using the single-well crude oil water content online weighing and measuring system comprises the following steps of:
crude oil in the crude oil process pipeline 1 enters a filter 5 through a liquid inlet manual valve 2, a liquid inlet electromagnetic valve 3 and a liquid inlet pipeline 4, solid impurities in the crude oil are filtered, and the filtered crude oil enters a liquid standing container 7 with an exhaust hole 6, so that part of gas in the crude oil can be removed; then the mixture enters an oil-water cyclone separator 8 to carry out oil-water separation, layered liquid after oil-water separation enters a funnel-shaped liquid container 9, weight measurement is carried out through a weighing sensor 10, and measurement data M1 can be transmitted to a PLC (programmable logic controller) or a DSP (digital signal processor) controller 13 through a serial communication cable 12; then the separated water at the bottom layer enters an oil-water mixing container 21 through a liquid outlet pipe 20 under the control of a liquid outlet electromagnetic valve 19, meanwhile, an infrared medium liquid level sensor 11 detects the liquid level change, and the liquid outlet electromagnetic valve 19 is closed when the detection interface changes; the weight measurement by the load cell 10 and the measurement data M2 can be transmitted to the PLC controller or DSP controller 13 via the serial communication cable 12; after the measurement is finished, the dehydrated crude oil enters an oil-water mixing container 21 through a liquid outlet electromagnetic valve 19 and a liquid outlet conduit 20; the new oil-water mixture is reinjected into the crude oil process pipeline 1 through the comprehensive control of the reinjection manual valve 22, the reinjection electromagnetic valve 23, the backflow pipeline 24, the backflow electromagnetic valve 25 and the backflow manual valve 26, so that the recovery and the reutilization of crude oil are ensured. Meanwhile, the PLC controller or the DSP controller 13 can perform data calculation (M1-M2)/M1 to obtain the water content of the crude oil, and the calculation can adopt a method of measuring weighted average for a plurality of times to ensure the reliability and the accuracy of the data. The collected data and the operation data of the PLC controller or the DSP controller 13 can be transmitted to the site display instrument 15 for on-site display through the bus communication cable 14; the water content real-time data of each single well crude oil can be recorded by the monitoring center computer 18 at the same time, so that historical data inquiry, data analysis and the like can be performed.
Claims (5)
1. An online weighing measurement system for the water content of single-well crude oil is characterized in that: the device comprises a liquid inlet pipeline connected with a crude oil process pipeline, wherein a liquid inlet control valve is arranged on the liquid inlet pipeline; the liquid inlet pipeline is sequentially connected with the filtering device, the exhaust device and the oil-water separation device; the lower end of the oil-water separation device is provided with a funnel-shaped liquid container, and the outside of the funnel-shaped liquid container is provided with a weighing device for weighing liquid in the funnel-shaped liquid container and a liquid level sensing device for detecting liquid levels among different mediums; a liquid outlet control valve is arranged at the outlet of the funnel-shaped liquid container; the funnel-shaped liquid container is communicated with the oil-water mixing container through a liquid outlet pipeline; the oil-water mixing container is communicated with a crude oil process pipeline through a return pipeline;
the return line is provided with a reinjection control valve and a return control valve; the liquid inlet control valve, the reinjection control valve and the backflow control valve comprise a manual valve and an electromagnetic valve; the weighing device and the liquid level sensing device are communicated with the controller through a communication cable; each electromagnetic valve is connected with the controller; the controller is connected with a monitoring center computer through a remote communication unit and/or is connected with a field display instrument; the liquid level sensor is an infrared medium liquid level sensor; the controller is a PLC controller or a DSP controller.
2. The method for measuring the water content of the crude oil by adopting the single-well crude oil water content online weighing measurement system as claimed in claim 1, which is characterized in that: filtering crude oil, removing solid slag, exhausting, separating oil from water, and obviously layering a water layer and an oil layer in a funnel-type liquid container; the weighing system weighs the total weight M1 of the liquid in the funnel-shaped liquid container; then discharging the water layer in the funnel-shaped liquid container, and closing the liquid outlet control valve when the liquid level sensing device detects that the oil-water interface is at the outlet of the funnel-shaped liquid container, and weighing the weight M2 of the oil layer liquid by the weighing system; and obtaining the water content of the crude oil from the measured M1 and M2.
3. The method for measuring the water content of crude oil as claimed in claim 2, wherein: the water layer and the oil layer in the funnel-shaped liquid container respectively enter the oil-water mixing container and flow back to the crude oil process pipeline after being uniformly mixed.
4. The method for measuring the water content of crude oil as claimed in claim 2, wherein: the controller calculates the water content of the crude oil according to the received M1 and M2 data; the obtained crude oil water content data are displayed on an on-site display instrument and/or transmitted to a monitoring center computer.
5. The method for measuring the water content of crude oil as claimed in claim 2, wherein: and obtaining the water content of the crude oil by taking a weighted average value through a plurality of measurement.
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| CN201710239788.5A CN106979906B (en) | 2017-04-13 | 2017-04-13 | Single-well crude oil water content online weighing measurement system and method |
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| CN201710239788.5A CN106979906B (en) | 2017-04-13 | 2017-04-13 | Single-well crude oil water content online weighing measurement system and method |
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| CN106979906A CN106979906A (en) | 2017-07-25 |
| CN106979906B true CN106979906B (en) | 2024-02-09 |
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| CN111141635A (en) * | 2020-01-20 | 2020-05-12 | 盘锦辽河油田博洋工控技术有限公司 | Method for obtaining water content of crude oil, crude oil water content measuring mechanism and system |
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| CN102778410A (en) * | 2012-07-31 | 2012-11-14 | 张伟 | Method and device for rude oil on-line phase-changing water-containing detection |
| CN103808763A (en) * | 2012-11-09 | 2014-05-21 | 中国石油化工股份有限公司 | Crude oil water-content metering analysis system |
| CN104265265A (en) * | 2014-08-29 | 2015-01-07 | 荆州市明德科技有限公司 | Direct measuring method for single-well crude oil gas yield |
| CN204255786U (en) * | 2014-11-06 | 2015-04-08 | 中国石油天然气股份有限公司 | Crude oil water content measurement mechanism |
| CN209027943U (en) * | 2017-04-13 | 2019-06-25 | 滨州学院 | Single-well crude oil moisture content online weighing measuring system |
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2017
- 2017-04-13 CN CN201710239788.5A patent/CN106979906B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102778410A (en) * | 2012-07-31 | 2012-11-14 | 张伟 | Method and device for rude oil on-line phase-changing water-containing detection |
| CN103808763A (en) * | 2012-11-09 | 2014-05-21 | 中国石油化工股份有限公司 | Crude oil water-content metering analysis system |
| CN104265265A (en) * | 2014-08-29 | 2015-01-07 | 荆州市明德科技有限公司 | Direct measuring method for single-well crude oil gas yield |
| CN204255786U (en) * | 2014-11-06 | 2015-04-08 | 中国石油天然气股份有限公司 | Crude oil water content measurement mechanism |
| CN209027943U (en) * | 2017-04-13 | 2019-06-25 | 滨州学院 | Single-well crude oil moisture content online weighing measuring system |
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| 一种新型原油含水率在线测量系统;姜海潮;;石油化工应用(03);全文 * |
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