CN103147740A - Method for testing liquid level echo time - Google Patents
Method for testing liquid level echo time Download PDFInfo
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- CN103147740A CN103147740A CN2012100943887A CN201210094388A CN103147740A CN 103147740 A CN103147740 A CN 103147740A CN 2012100943887 A CN2012100943887 A CN 2012100943887A CN 201210094388 A CN201210094388 A CN 201210094388A CN 103147740 A CN103147740 A CN 103147740A
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Abstract
The invention discloses a method for testing liquid level echo time. The method comprises the following steps of: triggering a plurality of acoustic impulse signals at a well head, and recording the time interval between the signals; filtering each echo signal by a filtering circuit, and finding all suspected liquid level echo signals; finally judging whether the time interval among the suspected liquid level echo signals is the same with the time interval of the triggered acoustic impulse signals; and taking the time from the starting time of the suspected liquid level echo signals with the same time interval to the starting time of triggering the first acoustic impulse signal at the well head as the liquid level echo time. Because of adopting the technical scheme, the liquid level echo signal can be exactly identified by one testing; the serious affect of low-frequency interference signals in a test field can be conquered; and the testing accuracy and testing efficiency can be improved. By the method, the application range of an oil well liquid level testing apparatus can be enlarged, and the method is suitable for popularizing.
Description
Technical field
The present invention relates to the oil-well instrument technical field of measurement and test, particularly a kind of method of testing the liquid level echo time.
Background technology
At present, usually adopt echo method to measure oil-well level.This method needs ping that accurately test produces from well head to the time that receives the liquid level echo-signal.In the proper testing process, include interfering signal in echo signal, the liquid level echo-signal that represents liquid level information need to be separated from other interfering signal, could calculate from well head and produce ping to the time that receives the liquid level echo-signal.The method of testing of present various oil-well instruments is only by filter circuit, interfering signal to be filtered out, and isolates the liquid level echo-signal.But, when oil pumper in running order, or test site is when having the low-frequency disturbance such as mechanical execution comparatively serious, the frequency of interfering signal is comparatively close with liquid level echo-signal ripple frequency, filter circuit can not accurately be distinguished two kinds of signals, test accuracy is relatively poor, often causes level mistake in computation as a result.In order to eliminate this erroneous judgement, the operator can repeatedly test, and the signal that is relatively approached by artificial selection is as the liquid level echo-signal, and consuming time long, operating efficiency is lower.And because level can change, repeatedly test also not exclusively can accurately be distinguished the liquid level echo-signal.
Summary of the invention
The technical problem to be solved in the present invention is: provide a kind of and can accurately distinguish the liquid level echo-signal, improve the method for the test liquid level echo time of test accuracy and efficient, to overcome the deficiencies in the prior art.
The present invention is achieved in that it comprises following operating procedure:
A) first pull the trigger several pings at well head, and record the time interval between it;
B) adopt filter circuit to carry out filtering to echo signal, and find out all doubtful liquid level echo-signals;
C) judge whether the time interval between doubtful liquid level echo-signal is identical with the time interval of the ping of percussion;
The time started that d) will have the doubtful liquid level echo-signal at same time interval is pulled the trigger the time started of first ping as the liquid level echo time apart from well head.
In the method for above-mentioned test liquid level echo time, the quantity of described several pings is 2 to 5.
In the method for aforesaid test liquid level echo time, the time interval of several pings is unequal.
Owing to having adopted technique scheme, compared with the prior art, the present invention is by judging the ping time interval of percussion and the time interval contrast of doubtful liquid level echo-signal, only need once test just can accurately identify the liquid level echo-signal, overcome having a strong impact on of test site low-frequency interference signal, improved test accuracy and testing efficiency.And adopt the present invention can enlarge the scope of application of liquid level measurer for oil well device, be suitable for promoting.
Description of drawings:
Accompanying drawing 1 is not for existing the hypothesis testing curve synoptic diagram of interfering signal;
Accompanying drawing 2 is for existing the conventionally test curve synoptic diagram of disturbing wave;
Accompanying drawing 3 accurately records liquid level echo time schematic diagram for adopting after the present invention.
Being labeled as of accompanying drawing: 1-ping, 2-liquid level echo-signal, 3-interfering signal, T1-liquid level echo time, the time interval of T2-first and second ping, the time interval between T3-first and the 3rd ping.
The specific embodiment:
The present invention is further illustrated below in conjunction with drawings and Examples.
Embodiments of the invention: first pull the trigger several pings at well head (for example shown in Figure 3, well head is pulled the trigger three pings that pulse width is 10ms with electric horn), and the time interval of recording between it is (for example shown in Figure 3, the time interval T2 of first and second ping is 50ms, and the time interval T3 of first and the 3rd ping is 200ms.The present invention also can be with second the time interval with the 3rd ping as T3); Then adopt existing conventional filter circuit to carry out filtering to echo signal, and find out all doubtful liquid level echo-signals; Judge again whether the time interval between doubtful liquid level echo-signal is identical with the time interval of the ping of percussion; The time started that will have at last the doubtful liquid level echo-signal at same time interval is pulled the trigger the time started of first ping as liquid level echo time (for example shown in Figure 3, the liquid level echo time is T1) apart from well head.Consuming time in order to reduce, further improve testing efficiency, can pull the trigger 2 to 5 pings (for example shown in Figure 3, as to pull the trigger three pings).In order further to improve test accuracy, can the time interval of several pings is unequal (for example shown in Figure 3, the time interval of first and second ping and the time interval of second and the 3rd ping are unequal).
Embodiments of the present invention are not limited to above-described embodiment, and the various variations of making under the prerequisite that does not break away from the invention aim all belong to the protection domain of invention.
Claims (3)
1. method of testing the liquid level echo time, it is characterized in that: it comprises following operating procedure:
A) first pull the trigger several pings at well head, and record the time interval between it;
B) adopt filter circuit to carry out filtering to echo signal, and find out all doubtful liquid level echo-signals;
C) judge whether the time interval between doubtful liquid level echo-signal is identical with the time interval of the ping of percussion;
The time started that d) will have the doubtful liquid level echo-signal at same time interval is pulled the trigger the time started of first ping as the liquid level echo time apart from well head.
2. the method for test liquid level echo time according to claim 1, it is characterized in that: the quantity of described several pings is 2 to 5.
3. the method for test liquid level echo time according to claim 1, it is characterized in that: the time interval of several pings is unequal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210094388.7A CN103147740B (en) | 2012-04-01 | 2012-04-01 | A kind of method of testing the liquid level echo time |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210094388.7A CN103147740B (en) | 2012-04-01 | 2012-04-01 | A kind of method of testing the liquid level echo time |
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| Publication Number | Publication Date |
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| CN103147740A true CN103147740A (en) | 2013-06-12 |
| CN103147740B CN103147740B (en) | 2015-11-04 |
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| CN201210094388.7A Active CN103147740B (en) | 2012-04-01 | 2012-04-01 | A kind of method of testing the liquid level echo time |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108252708A (en) * | 2018-02-28 | 2018-07-06 | 西安石油大学 | A kind of well fluid level recognition methods |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86208888U (en) * | 1986-11-08 | 1987-10-28 | 河北省地质矿产局第四水文地质工程地质大队 | Motor-pumped well (drill hole) sonic water-level meter |
| US5031467A (en) * | 1989-12-11 | 1991-07-16 | Shell Oil Company | Pulse echo technique for detecting fluid flow |
| CN1806182A (en) * | 2003-05-09 | 2006-07-19 | 贝克休斯公司 | Time-domain data integration of multiple gradient,multiple TE echo trains |
| CN101469609A (en) * | 2007-12-26 | 2009-07-01 | 李枝梅 | Oil pumping well liquid level measuring systems, measuring method and oil pumping well oil extraction technique integrated control system |
| CN201429447Y (en) * | 2008-12-25 | 2010-03-24 | 雷建龙 | Portable practical liquid-level measuring device |
| CN201884023U (en) * | 2010-09-19 | 2011-06-29 | 山东科技大学 | Drill deposit thickness ultrasonic measurement system |
| RU2010134524A (en) * | 2010-08-19 | 2012-02-27 | Общество с ограниченной ответственностью Томское научно-производственное и внедренческое общество "СИАМ" (RU) | METHOD FOR DETERMINING A LIQUID LEVEL IN AN OIL WELL |
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2012
- 2012-04-01 CN CN201210094388.7A patent/CN103147740B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86208888U (en) * | 1986-11-08 | 1987-10-28 | 河北省地质矿产局第四水文地质工程地质大队 | Motor-pumped well (drill hole) sonic water-level meter |
| US5031467A (en) * | 1989-12-11 | 1991-07-16 | Shell Oil Company | Pulse echo technique for detecting fluid flow |
| CN1806182A (en) * | 2003-05-09 | 2006-07-19 | 贝克休斯公司 | Time-domain data integration of multiple gradient,multiple TE echo trains |
| CN101469609A (en) * | 2007-12-26 | 2009-07-01 | 李枝梅 | Oil pumping well liquid level measuring systems, measuring method and oil pumping well oil extraction technique integrated control system |
| CN201429447Y (en) * | 2008-12-25 | 2010-03-24 | 雷建龙 | Portable practical liquid-level measuring device |
| RU2010134524A (en) * | 2010-08-19 | 2012-02-27 | Общество с ограниченной ответственностью Томское научно-производственное и внедренческое общество "СИАМ" (RU) | METHOD FOR DETERMINING A LIQUID LEVEL IN AN OIL WELL |
| CN201884023U (en) * | 2010-09-19 | 2011-06-29 | 山东科技大学 | Drill deposit thickness ultrasonic measurement system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108252708A (en) * | 2018-02-28 | 2018-07-06 | 西安石油大学 | A kind of well fluid level recognition methods |
| CN108252708B (en) * | 2018-02-28 | 2021-07-13 | 西安石油大学 | Method for identifying working fluid level of oil well |
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| CN103147740B (en) | 2015-11-04 |
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