CN1598530A - Separater and measuring method for measuring water content of oil well - Google Patents
Separater and measuring method for measuring water content of oil well Download PDFInfo
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- CN1598530A CN1598530A CN 200410035654 CN200410035654A CN1598530A CN 1598530 A CN1598530 A CN 1598530A CN 200410035654 CN200410035654 CN 200410035654 CN 200410035654 A CN200410035654 A CN 200410035654A CN 1598530 A CN1598530 A CN 1598530A
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Abstract
The invention relates to separator and measuring method for measuring water content of oil well. The measuring method is: (1) the liquid needed to be measured is poured into the separator, shuts off the balancing valve, and the liquid level of the separator is decreased to the lowest; (2) opens the balance valve, the liquid level upgrades, when the liquid level upgrades to the upper limit a of the oil glass tube, records the lifting height of the second liquidometer, and pours the liquid out of the separator; (3) pours liquid of another well into the separator, repeats above mentioned two steps, acquires the rising height of the second liquidometer; (4) works out the water content according to the water content formula of oil well. The method is simple, and the process is convenient, the measuring precise is upgraded greatly.
Description
One, technical field:
The present invention relates to a kind of utensil and method of surveying water percentage, particularly a kind of separation vessel and measuring method of surveying water ratio in oil well.
Two, background technology:
The hand sampling chemical examination of Daqing oil field mass campaign sixties initial stage employing is generally continued to use in the acquisition of each oilfield water percentage at present, and the workman obtains oil sample at well head by oil recovery, uses way of distillation chemical examination to draw through the lab technician.Along with oil-field development enters the middle and later periods, there are a large amount of free waters in most produced liquid in oil well, because the nonuniformity of fluid in the oil pipeline, the sample of obtaining can not truly reflect the composition of liquid in the pipeline, chemically examines the water ratio in oil well data that obtain like this and certainly exists bigger error.According to the study, this error can reach 20%---and 30%, and present separation vessel comprises separator main body, liquid level gauge and import, outlet, exhausr port, can only realize the gas-oil separation effect.
Three, summary of the invention:
Purpose of the present invention is exactly the above-mentioned defective that exists at prior art, provides a kind of easy, accurate acquisition to survey the separation vessel and the measuring method of water ratio in oil well.
Technical scheme of the present invention is: the separation vessel of this survey water ratio in oil well, comprise separator main body, first liquid level gauge and import, outlet, exhausr port, the top of the separator main body top and first liquid level gauge is communicated to the gas evener, especially in first liquid level gauge high scale place's perforate of separator main body, and be communicated with the water bag, second liquid level gauge is installed on water bag end face, and the top of second liquid level gauge is communicated with the gas evener.Device has operation valve respectively on the communicating pipe of gas evener and first liquid level gauge and second liquid level gauge.
Measuring process is as follows: (1) pours liquid to be measured into separation vessel, closes compensation flap, is pressed onto the separation vessel liquid level minimum; (2) open compensation flap, the separation vessel liquid level rises, and when liquid level rises to gauging glass tube upper limit a, writes down the second liquid level gauge lifting height b, and liquid to be measured is poured out separation vessel; (3) pour the liquid to be measured of another mouthful well into to separation vessel, repeat above-mentioned two steps, the second liquid level gauge lifting height b of survey; (4) obtain water percentage according to surveying the water ratio in oil well formula.
Wherein, surveying the water ratio in oil well formula is: g=e/[e+f* (1-e)], wherein, (a/ (a+b/y)-f)/(1-f) is in the formula: the quality water percentage of g-oil well, e-volumetric water content, the former gauging glass tube of a-water column lifting height, the b-second glass tube water colunm height, f-oil density, y-separation vessel upper liquid density for e=.
The invention has the beneficial effects as follows the separation vessel of this survey water ratio in oil well and measuring method is simple, measuring process is easy, results of measuring meets the production needs, and the results of measuring maximum error is 1.9%, thereby improved the measuring accuracy of water percentage greatly.
Four, description of drawings:
Accompanying drawing is the structural representation of separation vessel of the present invention
Five, embodiment:
Embodiment, in conjunction with the accompanying drawings, this separation vessel comprises separator main body 1, first liquid level gauge 2 and import 7, outlet 6, exhausr port 8, gas evener 3.In first liquid level gauge, the 2 high scale place perforates of separator main body 1, and be communicated with water bag 4, second liquid level gauge 5 is installed on water bag 4 end faces, the exhausr port at separator main body 1 top is communicated with by gas evener 3 with first liquid level gauge 2, second liquid level gauge 5.Device has operation valve 9 respectively on the communicating pipe of gas evener 3 and first liquid level gauge 2 and second liquid level gauge 5.
Separation vessel among the present invention is on the basis of the former 600mm separation vessel used in the oil field, according to the law of connected vessels transformation: connect at special water bag end face in distance separation vessel minimum liquid level 720mm place's perforate, drawing one or four from water bag bottom 50mm then is in charge of, connect the four fens cocks and second glass-tube liquid level meter, glass tube gets the high-order bit and puts in separation vessel induction pipe bottom.Load onto cock on glass-tube liquid level meter top and also be in charge of on the gas balance that connects at glass tube with four, like this, a common separation vessel has just repacked into can survey two glass tube separators of produced liquid in oil well water percentage.
The step of measuring method of the present invention is as follows: (1) pours liquid to be measured into separation vessel, closes compensation flap, is pressed onto the separation vessel liquid level minimum; (2) open compensation flap, the separation vessel liquid level rises, and when liquid level rose to gauging glass tube upper limit a, meter is the second liquid level gauge lifting height b down, and liquid to be measured is poured out separation vessel; (3) pour the liquid to be measured of another mouthful well into to separation vessel, repeat above-mentioned two steps, the second liquid level gauge lifting height b of survey; (4) obtain water percentage according to surveying the water ratio in oil well formula.
Wherein, surveying the water ratio in oil well formula is: g=e/[e+f* (1-e)], wherein, (a/ (a+b/y)-f)/(1-f) is in the formula: the quality water percentage of g-oil well, e-volumetric water content, the former gauging glass tube of a-water column lifting height, the b-second glass tube water colunm height, f-oil density, y-separation vessel upper liquid density for e=.
When the profit in the separation vessel separated fully, then the separation vessel upper liquid was pure oil, surveyed that density y1 equals oil density f in the water ratio in oil well formula, obtained the volumetric water content e1 under separating fully and the quality water percentage g of oil well according to formula.
When the complete emulsification of separation vessel internal upper part liquid, oil emulsion water percentage e1, separation vessel upper liquid density: y2=e1+ (1-e1) * f then obtains the volumetric water content e2 under the complete emulsification and the quality water percentage g of oil well according to formula.
When separating with the complete emulsification of liquid fully, calculate the average density y=(y1+y2)/2 of liquid, thereby obtain the quality water percentage g of volumetric water content e and oil well according to formula according to profit in the separation vessel.
Data processing is as follows:
| Sequence number | Pound sign | Time (during day) | B value (mm) | The moisture e of volume calculated | Quality water percentage g (%) | Sample examination water percentage (%) 2 | Contrast | The experiment people | ||||
| ?1 | ?2 | Mean value | Not emulsification | Emulsification fully | Mean value | |||||||
| 1 | ?X152-433 | ?0310 | ?37 | ?33 | ?35 | ?0.639 | ?0.674 | ?0.657 | ?69.3 | ??63 | ?6.3 | Wang Liang |
| 2 | ?X152-217 | ?0310 | ?11 | ?13 | ?12 | ?0.872 | ?0.886 | ?0.879 | ?90.1 | ??90 | ?0.1 | |
| 3 | ?25-223 | ?0609 | ?23 | ?21 | ?22 | ?0.769 | ?0.793 | ?0.782 | ?81.9 | ?84 | ?-2.1 | People Li Zhao is auspicious |
| 4 | ?15-214 | ?0310 | ?19 | ?21 | ?20 | ?0.789 | ?0.811 | ?0.801 | ?83.5 | ?81 | ?2.5 | |
| 5 | ?X152-35 | ?0615 | ?27 | ?23 | ?25 | ?0.738 | ?0.766 | ?0.753 | ?78.1 | ?85.1 | ?-7 | |
| 6 | ?X152-423 | ?0615 | ?25 | ?21 | ?23 | ?0.758 | ?0.784 | ?0.772 | ?79.9 | ?79.3 | ?0.6 | |
| 7 | ?X152-440 | ?0709 | ?99 | ?101 | ?100 | ?0.063 | ?0.073 | ?0.068 | ?7.4 | ?4 | ?3.4 | |
| 8 | ?X152-27 | ?0708 | ?31 | ?29 | ?30 | ?0.688 | ?0.721 | ?0.706 | ?73.8 | ?71 | ?2.8 | |
| 9 | ?X152-312 | ?0708 | ?48 | ?52 | ?50 | ?0.496 | ?0.534 | ?0.516 | ?55.6 | ?52 | ?3.6 | |
| 10 | ?52-218 | ?0709 | ?104 | ?108 | ?106 | ?0.016 | ?0.018 | ?0.017 | ?1.9 | ?2 | ?-0.1 |
According to formula, according to retrofit process, a gets 720mm, determines the f value according to the analysis data that have of facing dish geological research institute.Separation vessel upper liquid density y value is divided three kinds of situation discussion:
When the profit in the separation vessel separated fully, then the separation vessel upper liquid was pure oil, surveyed that density y1 equals oil density f in the water ratio in oil well formula, obtained the volumetric water content e1 under separating fully and the quality water percentage g of oil well according to formula.
When the complete emulsification of separation vessel internal upper part liquid, oil emulsion water percentage e1, separation vessel upper liquid density: y2=e1+ (1-e1) * f then obtains the volumetric water content e2 under the complete emulsification and the quality water percentage g of oil well according to formula.
When separating with the complete emulsification of liquid fully according to profit in the separation vessel, calculate the average density y=(y1+y2)/2 of liquid, thereby obtain the quality water percentage g of volumetric water content e and oil well according to formula, data processing is as above shown.
Error analysis:
1, can not make a accurately reach 720mm in the practical operation, be fully possible but a is controlled in the 10mm value of the 720mm left and right sides, and consequent maximum error only is 1.5%
2, the glass-tube liquid level meter reading can be accurate to millimeter, and the maximum error that the b reading produces under the 1mm situation that fluctuates up and down is 1%.
3, separation vessel upper liquid density y is uncertain, not emulsification and fully under two kinds of situations of emulsification the maximum error between quality water percentage rate of calculating and the quality water percentage that goes out with mean value calculation be 1.9%, in the scope of error permission, as following table:
The error analysis table:
| The second glass tube reading b | 0 | ?5 | ?10 | ?20 | ?40 | ?60 | ?80 | ?90 | ?100 | ?105 | ?108 | |
| Well water g | Not emulsification | 1 | ?0.953 | ?0.907 | ?0.814 | ?0.629 | ?0.444 | ?0.259 | ?0.166 | ?0.074 | ?0.027 | ?0 |
| Emulsification fully | 1 | ?0.958 | ?0.917 | ?0.835 | ?0.664 | ?0.481 | ?0.288 | ?0.187 | ?0.084 | ?0.031 | ?0 | |
| Mean value | 1 | ?0.956 | ?0.912 | ?0.825 | ?0.647 | ?0.463 | ?0.273 | ?0.177 | ?0.079 | ?0.029 | ?0 | |
| Error | 0 | ?0.003 | ?0.005 | ?0.011 | ?0.018 | ?0.019 | ?0.015 | ?0.011 | ?0.005 | ?0.002 | ?0 | |
Claims (5)
1, a kind of separation vessel of surveying water ratio in oil well, comprise separator main body (1), first liquid level gauge (2) and import (7), outlet (6), exhausr port (8), be communicated with gas evener (3) at the exhausr port (8) at separator main body (1) top and the top of first liquid level gauge (2), it is characterized in that first liquid level gauge (2) high scale place perforate at separator main body (1), and be communicated with water bag (4), second liquid level gauge (5) is installed on Shui Bao (4) top, the top of second liquid level gauge (5) is communicated with gas evener (3), and device has operation valve (9) respectively on the communicating pipe of gas evener (3) and first liquid level gauge (2) and second liquid level gauge (5).
2, a kind of measuring method of surveying water ratio in oil well is characterized in that method is as follows: (1) pours liquid to be measured the separation vessel of described survey water ratio in oil well into, closes balance control valve (9), is pressed onto the separation vessel liquid level minimum; (2) open balance control valve (9), the separation vessel liquid level rises, and when liquid level rises to first liquid level gauge (2) upper limit a, writes down second liquid level gauge (5) lifting height b, and liquid to be measured is poured out separation vessel; (3) pour the liquid to be measured of another mouthful well into to separation vessel, repeat above-mentioned two steps, second liquid level gauge (5) the lifting height b of survey; Wherein surveying the water ratio in oil well formula is: g=e/[e+f* (1-e)], wherein, (a/ (a+b/y)-f)/(1-f) is in the formula: the quality water percentage of g-oil well, e-volumetric water content, the former gauging glass tube of a-water column lifting height, the b-second glass tube water colunm height, f-oil density, y-separation vessel upper liquid density for e=.
3, the measuring method of survey water ratio in oil well according to claim 2, it is characterized in that the profit in the separation vessel separates fully, then the separation vessel upper liquid is pure oil, density y1 equals oil density f in the described survey water ratio in oil well formula, obtains fully the volumetric water content e1 under separating and the quality water percentage g of oil well according to formula.
4, the measuring method of survey water ratio in oil well according to claim 2, it is characterized in that the complete emulsification of separation vessel internal upper part liquid, oil emulsion water percentage e1, separation vessel upper liquid density: y2=e1+ (1-e1) * f then obtains the volumetric water content e2 under the complete emulsification and the quality water percentage g of oil well according to formula.
5,, it is characterized in that the average density y=(y1+y2)/2 of separation vessel internal upper part liquid, thereby obtain the quality water percentage g of volumetric water content e and oil well according to formula according to the measuring method of claim 3 or 4 described survey water ratio in oil well.
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| CN 200410035654 CN1598530A (en) | 2004-09-07 | 2004-09-07 | Separater and measuring method for measuring water content of oil well |
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| CN 200410035654 CN1598530A (en) | 2004-09-07 | 2004-09-07 | Separater and measuring method for measuring water content of oil well |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102135484A (en) * | 2010-12-16 | 2011-07-27 | 西南石油大学 | Device and method for testing gas-water ratio of underground sample with water gas reservoir and water soluble gas reservoir |
| CN104165817A (en) * | 2014-08-27 | 2014-11-26 | 长春工程学院 | Real-time runoff sediment content measuring device and measuring method |
| CN106841329A (en) * | 2017-01-21 | 2017-06-13 | 张清 | A kind of crude oil water content on-line monitoring system |
| CN110821471A (en) * | 2019-10-25 | 2020-02-21 | 深圳中科捷飞科技有限公司 | Single-well oil measurement and production measurement system and method between measurement |
| CN111721922A (en) * | 2019-03-20 | 2020-09-29 | 株式会社率支 | Water detector with double structure with frost crack prevention function |
| CN111999204A (en) * | 2020-07-21 | 2020-11-27 | 兰州科庆仪器仪表有限责任公司 | Online weighing type automatic monitor for water content of crude oil |
| CN114428167A (en) * | 2020-09-21 | 2022-05-03 | 中国石油化工股份有限公司 | Method for detecting comprehensive water content of high-water-content single-well crude oil |
-
2004
- 2004-09-07 CN CN 200410035654 patent/CN1598530A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102135484A (en) * | 2010-12-16 | 2011-07-27 | 西南石油大学 | Device and method for testing gas-water ratio of underground sample with water gas reservoir and water soluble gas reservoir |
| CN104165817A (en) * | 2014-08-27 | 2014-11-26 | 长春工程学院 | Real-time runoff sediment content measuring device and measuring method |
| CN104165817B (en) * | 2014-08-27 | 2016-04-13 | 吉林省水土保持科学研究院 | Radial flow sediment content real-time measurement apparatus and measuring method |
| CN106841329A (en) * | 2017-01-21 | 2017-06-13 | 张清 | A kind of crude oil water content on-line monitoring system |
| CN111721922A (en) * | 2019-03-20 | 2020-09-29 | 株式会社率支 | Water detector with double structure with frost crack prevention function |
| CN110821471A (en) * | 2019-10-25 | 2020-02-21 | 深圳中科捷飞科技有限公司 | Single-well oil measurement and production measurement system and method between measurement |
| CN111999204A (en) * | 2020-07-21 | 2020-11-27 | 兰州科庆仪器仪表有限责任公司 | Online weighing type automatic monitor for water content of crude oil |
| CN114428167A (en) * | 2020-09-21 | 2022-05-03 | 中国石油化工股份有限公司 | Method for detecting comprehensive water content of high-water-content single-well crude oil |
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