CN1266185A - Method for raising measuring precision of water content in water flooding developed oil-bearing formation - Google Patents
Method for raising measuring precision of water content in water flooding developed oil-bearing formation Download PDFInfo
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- CN1266185A CN1266185A CN 99122688 CN99122688A CN1266185A CN 1266185 A CN1266185 A CN 1266185A CN 99122688 CN99122688 CN 99122688 CN 99122688 A CN99122688 A CN 99122688A CN 1266185 A CN1266185 A CN 1266185A
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Abstract
The method for raising measuring accuracy of water content of waterflooding oil reservoir is characterized by that an instrument with collector, splitter, flowmeter and water holddup meter is placed over the producing formation required for monitoring at fixed point, and the liquid water-holding rate of producing formation can be continuously collected for several times at equal time interval, and the calculation of water content of producing formation adopts the statistical average value of measurement results for several times by using same water holdup meter (or fluid densimeter) at same space position. Under the actual conditionof radom change of water content of liquid producced by high water content producing formation said invention can be used to implement data acquisition and data treatment, so that it overcome the defects of traditional "depth continuously sampling and measuring" process.
Description
The measurement that the present invention relates to payzone water percentage in the Petroleum Production is calculated, and more precisely is a kind of method that improves measuring precision of water content in water flooding developed oil-bearing formation.
Measurement of water ratio method in the payzone is that crude oil and the water that is based upon in stratum and the well all is on the mixed uniformly condition basis at present, and therefore resembling water holdup measuring methods such as capacitance method water cut meter, gradiomanometer and gamma fluid density meter all is to adopt continuous coverage on the some survey or the degree of depth.And be forms such as slug-wise and blister in fact for the liquid of moisture its output of payzone of height, profit can not evenly mix at all, but a kind of Discrete Distribution at random, it a bit is not representative only surveying for a discrete random variable like this, and therefore measurement of water ratio and computing method error for flooding developed oil-bearing formation of payzone are too big at present.
The purpose of this invention is to provide a kind of method that improves measuring precision of water content in water flooding developed oil-bearing formation.
Technical scheme of the present invention:
1. the measurement mechanism that will have current collector, shunt, flowmeter and water cut meter is put into the top of oil well payzone, and constant duration ground is the liquid water holdup of continuous acquisition payzone repeatedly.
3. with current collector instrument is fixed when measuring, guarantees to be monitored layer the whole sensor (collector or detector) by instrument of fluid, below the liquid of payzone directly enter oil well pump by shunt.The water holdup of fluid is repeatedly gathered on sensor in instrument constant duration ground under the control of on-off circuit, the data that record are added up to ask average or be transferred to ground-based computer with cable with microprocessor do to add up and ask average, can obtain the production fluid water percentage in certain volume (or output) or a period of time.Concrete computing method are as follows: water percentage
, x wherein
iBe the water holdup tool meter measurement result of sampling each time (or difference of the water holdup surveyed of last two same instruments in adjacent layer position), n measures number of times, and promptly constant duration is measured n time in certain time interval T, n＞1; Its occurrence can be decided according to the speed of sensor and microprocessor.Then Y is exactly the water percentage of liquid volume (or output) in the T time, and Nei total volumetric flow rate is provided by flowmeter during this period of time.
For flooding developed oil-bearing formation, this metering system is compared more objective, actual, measured water percentage and is had higher precision with classic method.
Description of drawings:
Fig. 1 is the schematic diagram of this measuring method, and Fig. 2 is the diversion structure synoptic diagram
Embodiment:
Along the borehole wall 6 measurement mechanism 1 is put into the top of payzone 5 with cable or steel wire, opening current collector 2 and current collector 7 seals pit shaft, make the fluid in the payzone 5 to be measured could be taken away by oil well pump after inlet 9 and outlet 15 enter flowmeter 4 and water cut meter (capacitance method water cut meter) 3 by detecting, in the process of liquid flow, flowmeter 4 records flow, lower floor's liquid is flowed into, is flowed out through exporting 11 by the inlet 10 of shunt 8, directly enters oil well pump.The water holdup of repeatedly gathering fluid of the constant duration under the control of on-off circuit of the sensor in the water cut meter 3, the data that record with the microprocessor in the underground survey device 1 do data processing obtain water percentage or with cable data transmission behind ground-based computer, process by above-mentioned model and to provide certain output (as tens tons or hundreds of ton) that payzone flows out or the production fluid water percentage of (as several hours or several days) in a period of time.Concrete computing method are as follows: water percentage
, x wherein
iBe the water holdup instrument measurement result of sampling each time (or difference of the water holdup surveyed of last two same instruments in adjacent layer position), n measures number of times, promptly in a period of time T, measure n time (n＞1), then Y is exactly the water percentage of T time inner fluid total amount, and Nei total flow is provided by flowmeter during this period of time.For example: measuring once every 5 minutes water cut meters, recorded n=12 data in 1 hour, is respectively x
1=31%, x
2=20%, x
3=66%, x
4=0%, x
5=80%, x
6=100%, x
7=40%, x
8=70%, x
9=60%, x
10=40%, x
11=20%, x
12=38%; Then water percentage is:
The integrated flow that is recorded in the T during this period of time by flowmeter is 40 tons, so we claim that this water percentage of 40 tons is 47.08%.Or claim that the water percentage in this hour is 47.08%.If short again for the sensor sampling interval of some mode certainly, measuring accuracy can be higher.
Claims (3)
1. method that improves measuring precision of water content in water flooding developed oil-bearing formation, the measurement mechanism (1) that it is characterized in that having current collector (2), flowmeter (4), water cut meter (3), current collector (7) and shunt (6) is put into the top of payzone (5), and constant duration ground is the liquid water holdup of continuous acquisition payzone repeatedly.The effect of current collector (2), current collector (7) and shunt (8) is to guarantee that the following fluid of payzone to be monitored is all flowed into, flowed out through outlet (11) by the inlet (10) of shunt (8), directly enter oil well pump, and the fluid of payzone to be detected is by detection inlet (9) input of shunt (8), measure through outlet (15) flowmeter (4) and water cut meter (3), the last outlet (12) through instrument flows out to oil well pump then.
2. the calculating of the water percentage Y of payzone is same water cut meter (or fluid density meter) statistical average of measurement result for several times on the same space position
, x
iBe result's (or difference of the water holdup of last two same instruments in adjacent layer position) that water cut meter is measured each time, n is the number of times of measuring during this period of time.
3. the method for raising measuring precision of water content in water flooding developed oil-bearing formation as claimed in claim 1 is characterized in that: shunt (8) is a drum type, as shown in Figure 2, following face seal, top semitight middle is separated by dividing plate, shunts to have inlet (10) below the side (13), have outlet (11) above, opposite side is sense channel (14), and it has detects inlet (9) and outlet (15), and liquid to be detected mouthful (9) after testing flows into, flow out by top outlet (15), enter flowmeter (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99122688 CN1249433C (en) | 1999-12-26 | 1999-12-26 | Method for raising measuring precision of water content in water flooding developed oil-bearing formation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99122688 CN1249433C (en) | 1999-12-26 | 1999-12-26 | Method for raising measuring precision of water content in water flooding developed oil-bearing formation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1266185A true CN1266185A (en) | 2000-09-13 |
| CN1249433C CN1249433C (en) | 2006-04-05 |
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ID=5282671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99122688 Expired - Fee Related CN1249433C (en) | 1999-12-26 | 1999-12-26 | Method for raising measuring precision of water content in water flooding developed oil-bearing formation |
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| CN (1) | CN1249433C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101907594A (en) * | 2010-06-11 | 2010-12-08 | 中国石油天然气股份有限公司 | Wellhead crude oil water content on-line measuring device |
| CN101967969A (en) * | 2010-10-22 | 2011-02-09 | 大庆油田有限责任公司 | High-resolution water cut meter based on distributary method |
| CN102411045A (en) * | 2011-08-05 | 2012-04-11 | 郑州光力科技股份有限公司 | Measuring instrument for trace moisture in oil |
| CN103541725A (en) * | 2012-07-11 | 2014-01-29 | 中国石油化工股份有限公司 | Method for obtaining holding rate of horizontal well through interfacial level |
| CN106499387A (en) * | 2016-12-21 | 2017-03-15 | 西南石油大学 | A kind of active specific retention measurement apparatus |
| CN111982221A (en) * | 2020-09-25 | 2020-11-24 | 新疆中元天能油气科技股份有限公司 | Oil-gas-water measuring device and measuring method |
| CN112096374A (en) * | 2020-09-03 | 2020-12-18 | 东北石油大学 | Dynamic measurement error compensation method for measuring oil holdup by flow splitting method |
-
1999
- 1999-12-26 CN CN 99122688 patent/CN1249433C/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101907594A (en) * | 2010-06-11 | 2010-12-08 | 中国石油天然气股份有限公司 | Wellhead crude oil water content on-line measuring device |
| CN101907594B (en) * | 2010-06-11 | 2012-07-18 | 中国石油天然气股份有限公司 | Wellhead crude oil water content on-line measuring device |
| CN101967969A (en) * | 2010-10-22 | 2011-02-09 | 大庆油田有限责任公司 | High-resolution water cut meter based on distributary method |
| CN102411045A (en) * | 2011-08-05 | 2012-04-11 | 郑州光力科技股份有限公司 | Measuring instrument for trace moisture in oil |
| CN102411045B (en) * | 2011-08-05 | 2014-04-16 | 郑州光力科技股份有限公司 | Measuring instrument for trace moisture in oil |
| CN103541725A (en) * | 2012-07-11 | 2014-01-29 | 中国石油化工股份有限公司 | Method for obtaining holding rate of horizontal well through interfacial level |
| CN103541725B (en) * | 2012-07-11 | 2016-04-27 | 中国石油化工股份有限公司 | The method of horizontal well holdup is asked with interfacial level |
| CN106499387A (en) * | 2016-12-21 | 2017-03-15 | 西南石油大学 | A kind of active specific retention measurement apparatus |
| CN106499387B (en) * | 2016-12-21 | 2019-04-16 | 西南石油大学 | A kind of active specific retention measuring device |
| CN112096374A (en) * | 2020-09-03 | 2020-12-18 | 东北石油大学 | Dynamic measurement error compensation method for measuring oil holdup by flow splitting method |
| CN111982221A (en) * | 2020-09-25 | 2020-11-24 | 新疆中元天能油气科技股份有限公司 | Oil-gas-water measuring device and measuring method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1249433C (en) | 2006-04-05 |
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