CN1035688C - Automatic air/water content gauge for crude oil - Google Patents
Automatic air/water content gauge for crude oil Download PDFInfo
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- CN1035688C CN1035688C CN93107258A CN93107258A CN1035688C CN 1035688 C CN1035688 C CN 1035688C CN 93107258 A CN93107258 A CN 93107258A CN 93107258 A CN93107258 A CN 93107258A CN 1035688 C CN1035688 C CN 1035688C
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- center line
- crude oil
- water percentage
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- gamma ray
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Abstract
The present invention relates to an automatic air/water content measurer for crude oil. The lateral wall of a measuring pipeline is respectively fixed to a gamma-ray source and a transmission detector along both sides of a symmetrical position of a radial center line; the lateral wall of a center line is fixed to a scattering detector, wherein the center line and a center line where the gamma-ray source and the transmission detector are positioned form an included angle, and the center line is a certain distance away from the axial direction of the measuring pipeline; a measurement signal of the transmission detector and the scattering detector passes through a linear amplifying circuit, the measurement signal enters a computer to be calculated, and the measurement signal is displayed and outputted; a single chip computer which is publically known and software which is edited by the assembly language and contains the formula of computation, etc., form the computer. The measurer can realize the on-line full flow continuous automatic measurement, the measurement precision is high, and the present invention is suitable for proportion measurement of related three-phase mixed liquor for petroleum industry, chemical industry, metallurgy industry, etc.
Description
The present invention relates to a kind of crude oil gassiness, water percentage automatic measuring instrument.
In oilfield exploitation, in order accurately to grasp the oil field dynamic change, in time add up the pure oil yield of each production crew's individual well, for oil-field development and management provide reliable data, the measurement of crude oil water content is important techniques index and economic target, also is the emphasis of petroleum metering work; One of but up to this year, crude oil gassiness, water percentage on-line measurement are still each elephant, and even the technical barrier in the world.
In the prior art of measuring crude oil water content, sample examination method, capacitance method, microwave method, vibration densimetry are arranged; The sample examination method is time-consuming, and can not in time understand the situation of change of crude oil water content; Capacitance method is surveyed water percentage, if crude oil water content is higher than about 30%, then can't use; The employing microwave method is measured, because crude oil is relevant with the profit state to the reflection coefficient of microwave, needs according to circumstances to be revised; The vibrating tube densimetry is surveyed moisture, because field condition is difficult to satisfy the technical conditions of instrument, its stability is very poor.Moreover, the above-mentioned back three kinds of methods not only reliability of long-time running are put in order, and then powerless especially to the measurement of live crude.
Modern physics research institute of the Chinese Academy of Sciences is the ROH-F distractor-type crude oil water content measuring instrument and the FSh-K type crude oil water content measuring instrument of development and production, though measuring accuracy is higher, the continuous coverage good stability, but its limitation is arranged also, the former use that need match with vertical separator, and low-producing individual well is measured in being only applicable to; The latter then can only be used for the not measurement of water ratio of live crude (void fraction is lower than 0.5%).
The objective of the invention is for provide a kind of can be continuous online full flow measure, reliable and stable, measuring accuracy is high, simple in structure, crude oil gassiness, the water percentage automatic measuring instrument that can be used for measuring crude oil gassiness, water percentage separately.
Purpose of the present invention can realize by following measure:
A kind of crude oil gassiness, water percentage automatic measuring instrument are to be fixed with gamma ray projector and transmission detectors respectively in radial center line symmetry both sides, the sidewall upper edge of measuring channel; Forming an angle with gamma ray projector and transmission detectors place center line and axially on the center line sidewall of certain distance, be fixed with scattering detector with it along measuring channel; The measuring-signal of transmission detectors and scattering detector enters and demonstrates void fraction, water percentage, transmissometer digit rate and scatterometer digit rate after computing machine calculates behind linear amplifying circuit; Described computing machine is to add that by known single chip microcomputer the softwares such as timer counter, data acquisition, computing and demonstration output of assembly language establishment form; Wherein contain computing formula in the computing software, can obtain crude oil gassiness, water percentage by this formula, its computing formula is as follows:
Ln(Nx/No)＝(1－λ)(A＋Bη) (1)
Ln(Mx/Mo)＝(1－λ)(a＋bη) (2)
Transmission and scatterometer digit rate, A, B, a, b when the transmission when on behalf of void fraction, water percentage, Nx, the Mx of tested crude oil mixed liquor, λ, η respectively represent in the pipeline to tested crude oil mixed liquor respectively in the formula (1) (2) and scatterometer digit rate, No, Mo represent full gas in the pipeline respectively are the on-site proving parameter, then are constant for the oil well of determining.
Purpose of the present invention also can realize by following measure:
The measuring channel of a kind of crude oil gassiness, water percentage automatic measuring instrument can be directly and oil pipeline join, it is long to be the 250-350 millimeter; The intensity of gamma ray projector is that 5-300 millicurie, ENERGY E are 20-500 kiloelectron-volt; The angle of the place center line of scattering detector and the place center line of gamma ray projector and transmission detectors is 15 °-135 °; And the place center line of scattering detector is 0-± 100 millimeter from gamma ray projector and transmission detectors place distance between center line axially along measuring channel.
Principle of work of the present invention is as follows:
During measurement, crude oil flows through from measuring channel from the bottom up; At this moment, gamma ray projector radiation crude oil transmission detectors and scattering detector detect the signal after to gamma-ray absorption or scattering of various media in the crude oil respectively; This signal enters computing machine after linear amplifying circuit is handled, handle and demonstrate void fraction, water percentage, transmissometer digit rate, scatterometer digit rate by COMPUTER CALCULATION; Computing machine adds the master routine that the softwares such as timer counter, data acquisition, computing and demonstration output of assembly language establishment constitute by known single chip microcomputer.
Counting machine master routine in the computing formula of computing as follows:
Ln(Nx/No)＝(1－λ)(A＋Bη)(1)
Ln(Mx/Mo)＝(1－λ)(a＋bη)(2)
Transmission and scatterometer digit rate, A, B, a, b when the transmission when on behalf of gassiness, water percentage, Nx, the Mx of tested crude oil mixed liquor, λ, η respectively represent in the pipeline to tested crude oil mixed liquor respectively in the above-mentioned formula (1), (2) and scatterometer digit rate, No, Mo represent full gas in the pipeline respectively are the on-site proving parameter, then are constant for the oil well of determining.Gassiness, water percentage λ, the η of tested crude oil mixed liquor be can obtain by formula (1), (2), and output λ, η, Nx, Mx shown by computing machine.
The present invention has following advantage compared to existing technology:
1, measuring channel of the present invention can directly join with oil pipeline, and its measuring-signal handles the back by linear amplifier circuit and handled, shown output by COMPUTER CALCULATION, can realize the automatic continuous coverage of online full flow fully, need not other utility appliance.
2, measuring accuracy height of the present invention, measuring precision of water content in water can reach ± 1.5%, the void fraction measuring accuracy can reach ± 0.4%, measure reliable and stable.
3, the present invention can measure gassiness, wet oil; It is measured, and moisture scope is that 1-100%, gassiness are 0-50% (volume ratio) in the crude oil.
4, the present invention makes full use of same radiation source and does that transmission and scattering source thereby cost are low, debugging is convenient, usable range is wide, and the ratio part that can be used for the relevant three-phase mixed liquors of industry such as oil, chemical industry, metallurgy, environmental protection, food is measured.
Concrete structure of the present invention is provided by the following drawings:
Fig. 1 is a structural principle synoptic diagram of the present invention
1-measuring channel 2-gamma ray projector
3-scattering detector 4-transmission detectors
Fig. 2 is a measuring channel structural representation of the present invention
Fig. 3 is a computing machine main program block diagram of the present invention
The present invention also incites somebody to action in conjunction with the accompanying drawings, and 1,2 embodiment are described in further detail:
With reference to Fig. 1, the length of measuring channel (1) is 250 millimeters, and its internal diameter is identical with various standard petroleum pipeline calibers on the petrochemical complex; With reference to Fig. 2, be fixed with gamma ray projector (2) and transmission detectors (4) respectively in radial center line symmetry both sides, the sidewall upper edge of measuring channel (1); Axially on 50 millimeters place center line sidewall, be fixed with scattering detector (3) with it with gamma ray projector (2) and transmission detectors (4) place center line angle at 45 and along measuring channel (1); Gamma ray projector (2) is americium 241 radiation sources that state-run 404 factories produce, and scattering detector (3) and transmission detectors (4) are the BH0059 (4.344) that Beijing nuclear instrument head factory produces; The measuring-signal of scattering detector (3) and transmission detectors (4) enters computing machine and calculates and show output void fraction, water percentage, transmissometer digit rate, scatterometer digit rate behind linear amplifying circuit; Linear amplifier circuit is made by transistorized universal circuit or TTL integrated circuit, cmos circuit; With reference to Fig. 3, computing machine adds that by known single chip microcomputer the assembly language establishment contains the master routine software that calculates void fraction λ, water percentage η and forms; The computing formula of master routine computing is as follows in the computing machine:
Ln(Nx/No)＝(1－λ)(A＋Bη) (1)
Ln(Mx/Mo)＝(1－λ)(a＋bη) (2)
Parameter in the formula (1) (2) can come to determine at the scene in the following way: (λ is a void fraction, and η is a water percentage)
1., when measuring channel (1) is full gas, then λ=1, η=0, by formula (1), (2) Nx=No as can be known, the transmissometer digit rate when being the full gas of measuring channel (1) that computing machine shows; Mx=Mo, the scatterometer digit rate when being the full gas of measuring channel (1) that computing machine shows.
2., when measuring channel (1) is full oil, then λ=0, η=0, the transmissometer digit rate N oil when Nx be full oil, scatterometer digit rate M oil when Mx be oily entirely; Can know by inference by formula (1), (2):
3., when measuring channel (1) is full water, then λ=0, η=1, scatterometer digit rate M water when the transmissometer digit rate N water when Nx is full water, Mx are full water; Can know by inference by formula (1), (2):
Above-mentioned parameter then be a constant for oil well or the oil product determined, thereby on-the-spotly only needs demarcation once, can realize the measurement of gassiness, water percentage λ, η in the tested in any case crude oil mixed liquor.
Claims (4)
1, a kind of crude oil gassiness, water percentage automatic measuring instrument is characterized in that being fixed with gamma ray projector (2) and transmission detectors (4) respectively in radial center line symmetry both sides, the sidewall upper edge of measuring channel (1); Forming an angle with gamma ray projector (2) and transmission detectors (4) place center line and axially on the center line sidewall of certain distance, be fixed with scattering detector (3) with it along measuring channel (2); The measuring-signal of transmission detectors (4) and scattering detector (3) enters the void fraction, water percentage, transmissometer digit rate and the scatterometer digit rate that demonstrate tested crude oil mixed liquor after computing machine calculates behind linear amplifying circuit; Described computing machine adds that by known single chip microcomputer the softwares such as timer counter, data acquisition, computing and demonstration output of assembly language establishment form; Wherein contain computing formula in the computing software, can obtain crude oil gassiness, water percentage by this formula, its computing formula is as follows:
Ln(Nx/No)＝(1－λ)(A＋Bη) (1)
Ln(Mx/Mo)＝(1－λ)(a＋bη) (2)
Transmission and scatterometer digit rate when the transmission when on behalf of void fraction, water percentage, Nx, the Mx of tested crude oil mixed liquor, λ, η respectively represent in the pipeline to tested crude oil mixed liquor respectively in the formula (1) (2) and scatterometer digit rate, No, Mo represent full gas in the pipeline respectively, A, B, a, b are the on-site proving parameter, then are constant for the oil well of determining.
2, crude oil gassiness as claimed in claim 1, water percentage automatic measuring instrument, it is characterized in that measuring channel (1) can be directly and oil pipeline join, it is long to be the 250-350 millimeter.
3, crude oil gassiness as claimed in claim 1, water percentage automatic measuring instrument, the intensity that it is characterized in that gamma ray projector (2) are that 5-300 millicurie, ENERGY E are 20-500 kiloelectron-volt.
4, crude oil gassiness as claimed in claim 1, water percentage automatic measuring instrument is characterized in that the angle of the place center line of the place center line of scattering detector (3) and gamma ray projector (2) and transmission detectors (3) is 15 °-135 °; And the place center line of scattering detector (3) is 0-± 100 millimeter from gamma ray projector (2) and transmission detectors (4) place distance between center line axially along measuring channel (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93107258A CN1035688C (en) | 1993-06-16 | 1993-06-16 | Automatic air/water content gauge for crude oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93107258A CN1035688C (en) | 1993-06-16 | 1993-06-16 | Automatic air/water content gauge for crude oil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1086602A CN1086602A (en) | 1994-05-11 |
| CN1035688C true CN1035688C (en) | 1997-08-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN93107258A Expired - Fee Related CN1035688C (en) | 1993-06-16 | 1993-06-16 | Automatic air/water content gauge for crude oil |
Country Status (1)
| Country | Link |
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| CN (1) | CN1035688C (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998022783A1 (en) * | 1996-11-19 | 1998-05-28 | Jianwen Dou | A device and a method of measuring flow rate for a three phase fluid |
| GB0309385D0 (en) * | 2003-04-25 | 2003-06-04 | Cxr Ltd | X-ray monitoring |
| CN101050702B (en) * | 2007-04-20 | 2010-05-26 | 中国科学院声学研究所 | Measuring device and method for overcurrent type resonant sound spectrum multiple phase flow state test |
| CN101261235B (en) | 2008-05-06 | 2010-12-08 | 罗平安 | Crude oil gas fraction and moisture percentage dual energy X ray measurement method |
| CN103558233A (en) * | 2013-09-06 | 2014-02-05 | 北华航天工业学院 | Gamma-ray based petroleum component analysis method and analysis method thereof |
| CN104373121B (en) * | 2014-11-12 | 2017-10-17 | 中国石油天然气股份有限公司 | Downhole ray type water content monitor |
| CN109270092A (en) * | 2018-11-07 | 2019-01-25 | 陕西科技大学 | A kind of system and method using void fraction in low-energyγ-ray measurement biphase gas and liquid flow |
| CN110672642A (en) * | 2019-09-19 | 2020-01-10 | 兰州科庆仪器仪表有限责任公司 | Underground crude oil water content monitor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4289020A (en) * | 1979-12-26 | 1981-09-15 | Texaco Inc. | Microwave-gamma ray water in crude monitor |
| GB2088050A (en) * | 1980-11-25 | 1982-06-03 | Kendall Ernest John Michael | Gamma Ray Analysis of Multi- component Material |
| US4683759A (en) * | 1985-12-23 | 1987-08-04 | Texaco Inc. | Characterization of two-phase flow in pipes |
| CN1050769A (en) * | 1990-11-08 | 1991-04-17 | 大港石油管理局第一采油厂 | Analyzer of water content in low-energy crude oil |
-
1993
- 1993-06-16 CN CN93107258A patent/CN1035688C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4289020A (en) * | 1979-12-26 | 1981-09-15 | Texaco Inc. | Microwave-gamma ray water in crude monitor |
| GB2088050A (en) * | 1980-11-25 | 1982-06-03 | Kendall Ernest John Michael | Gamma Ray Analysis of Multi- component Material |
| US4683759A (en) * | 1985-12-23 | 1987-08-04 | Texaco Inc. | Characterization of two-phase flow in pipes |
| CN1050769A (en) * | 1990-11-08 | 1991-04-17 | 大港石油管理局第一采油厂 | Analyzer of water content in low-energy crude oil |
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| Publication number | Publication date |
|---|---|
| CN1086602A (en) | 1994-05-11 |
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