CN1047361A - Determine the length of empty froth section in machine-pumped oil well method - Google Patents
Determine the length of empty froth section in machine-pumped oil well method Download PDFInfo
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- CN1047361A CN1047361A CN89103449A CN89103449A CN1047361A CN 1047361 A CN1047361 A CN 1047361A CN 89103449 A CN89103449 A CN 89103449A CN 89103449 A CN89103449 A CN 89103449A CN 1047361 A CN1047361 A CN 1047361A
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- fluid level
- producing fluid
- well
- foam section
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Abstract
A kind of method of definite machine-pumped oil well foam section length is used on the oil field needs of measuring and calculating machine-pumped oil well flowing pressure.Its major technique feature is: when the producing fluid level waveform be " profile of tooth " (
) time, producing fluid level top non-foam section is described, and when the producing fluid level waveform be " trapezoidal " (
Description
The present invention relates to a kind of definite machine-pumped oil well annular space foam section length method, it belongs to level surface method measuring and calculating machine-pumped oil well (comprising rod-pumped well and submerged electric oil pump well) flowing pressure technical field.
There is foam section in machine-pumped oil well oil sets annular space producing fluid level top, is confirmed by various annular space pressure testing methods in recent years.But,, do not have a kind of method can determine the concrete length of this foam section up at present.And its existence affects the order of accuarcy of level surface method measuring and calculating machine-pumped oil well flowing pressure always.And then production analysis, the management of giving machine-pumped oil well often reach various construction operations and bring some errors, cause unnecessary loss.
The objective of the invention is to overcome weak point of the prior art, can be the accurate method that obtains a kind of definite machine-pumped oil well oil sets annular space foam section length of machine-pumped oil well flowing pressure and provide a kind of.
Purpose of the present invention can reach by following measure:
After the microphone that is connected to the well head sleeve gate sends sound wave, if the oil sets annular space producing fluid level waveform " trapezoidal " of the two-way reflection that liquid level indicator writes down that connects by lead (
) time, well head adds a certain amount of defoamer with a kind of chemicals dosing plant, treats a period of time in well after, just can record the producing fluid level waveform for " profile of tooth " (
) waveform.
For record the producing fluid level waveform for " trapezoidal " (
) well, accurately measure between its " trapezoidal go up base " ab apart from l, and substitution regression formula L=C
1+ C
2L just can calculate the length of this well oil sets annular space producing fluid level top foam section.
Description of drawings:
Figure one, is well head and tester connection diagram;
Figure two, are definite method schematic diagrames of distance between common four kinds of " trapezoidal " ripple ab.
To describe content of the present invention in detail below in conjunction with accompanying drawing:
A kind of microphone [3] is connected to the sleeve gate joint [2] of well head production tree [1] one side, and, a kind of two-way liquid level indicator [5] is linked to each other with microphone by special wire [4].Instrument is opened sleeve gate [2], and is made microphone [3] send sound wave after connecting.Soon subsequently, two-way liquid level indicator [5] just writes down the waveform that demonstrates this well oil sets annular space dynamic oil level of reflection and foam section length.When record the producing fluid level waveform for " profile of tooth " (
) time, producing fluid level top non-foam section is described; And when record the producing fluid level waveform for " trapezoidal " (
) time, illustrate that there is foam section in producing fluid level top.For the producing fluid level waveform be " trapezoidal " (
, between ab the distance be l) well, in well, add a certain amount of defoamer with a kind of chemicals dosing plant, and constantly measure several producing fluid level waveforms immediately.Can find this moment, add defoamer after, As time goes on, " trapezoidal " of reflection foam section length in the producing fluid level waveform that measures (
) the diminishing gradually of " go up base " ab apart from l, until after a period of time, well inner foam section is all eliminated, the producing fluid level waveform become " profile of tooth " (
) till the waveform.Like this, measure returning with the variation relation of the foam section length L of converting between different ab in above-mentioned " trapezoidal " waveform, can draw formula L=C according to its waveform apart from l
1+ C
2L.C wherein
1, C
2Be regression coefficient.Calculate at the scene in the machine-pumped oil well flowing pressure process, if from the producing fluid level waveform that records at first, measure " trapezoidal " (
) between ab apart from l, the substitution regression formula just can be obtained the exact length of the foam section of asking.
Optimum implementation of the present invention: at first, correctly instrument and well head are connected according to accompanying drawing one; Secondly, measure the i.e. distance between " the trapezoidal base of going up " ab of producing fluid level waveform exactly according to accompanying drawing two; Once more, science is summed up regression formula, and correctly carries out digital operation and calculate the producing fluid level of " newly " of getting rid of the foam section factor.Dynamic oil level conversion machine-pumped oil well flowing pressure with this " newly " just can realize final purpose of the present invention.
Implementation result of the present invention: according to showing in the measuring and calculating of the scene of certain 10 mouthfuls of well in oil field, the flowing pressure that adopts the present invention to calculate compares with downforce meter measured value in well, and the maximum deviation value is 0.33MPa, minimum deviation value is 0.02MPa, and the average departure value is 0.13MPa. And adopt the flowing pressure of conventional level surface method measuring and calculating and downforce meter measured value to compare, and the maximum deviation value is 1.76MPa, and minimum deviation value is 0.26MPa, and the average departure value is 0.98MPa. Obviously find out thus, adopt the flowing pressure of the present invention's measuring and calculating, on average can reduce error 0.85MPa than the flowing pressure that adopts conventional level surface method measuring and calculating, improve estimation precision 37.4%.
Claims (1)
1, a kind of method that is used for determining on the oil field machine-pumped oil well annular space producing fluid level top foam section length, its technical characterictic is:
1), after the microphone [3] that is connected to well head [1] sleeve gate [2] sends sound wave, the two-way liquid level indicator [5] that connects by lead [4] write down the oil sets annular space producing fluid level waveform that reflects be " trapezoidal " (
) time, well head adds a certain amount of defoamer with a kind of chemicals dosing plant, treats a period of time in well after, just can record the producing fluid level waveform for " profile of tooth " (
) waveform;
2), for the producing fluid level waveform be " trapezoidal " (
) waveform in, measure between its ab apart from l substitution regression formula: L=C
1+ C
2Among the l, just can obtain the length of this well oil sets annular space foam section, wherein, L is the length of foam section, C
1, C
2Be regression coefficient, l for producing fluid level " trapezoidal " ripple that records at well head (
) distance between ab;
3), regression formula L=C
1+ C
2L, be to exist " trapezoidal " ripple (
) well in add defoamer after, distance and the corresponding variation relation of dynamic oil level return and get between the ab that records by analysis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN89103449A CN1047361A (en) | 1989-05-18 | 1989-05-18 | Determine the length of empty froth section in machine-pumped oil well method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN89103449A CN1047361A (en) | 1989-05-18 | 1989-05-18 | Determine the length of empty froth section in machine-pumped oil well method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1047361A true CN1047361A (en) | 1990-11-28 |
Family
ID=4855118
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN89103449A Pending CN1047361A (en) | 1989-05-18 | 1989-05-18 | Determine the length of empty froth section in machine-pumped oil well method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1047361A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106321089A (en) * | 2015-07-08 | 2017-01-11 | 中国石油化工股份有限公司 | Method for judging foam segment of coalbed methane shaft |
| CN107355216A (en) * | 2017-06-30 | 2017-11-17 | 中国电子科技集团公司第三十三研究所 | A kind of well fluid level ripple recognition methods related based on echo |
-
1989
- 1989-05-18 CN CN89103449A patent/CN1047361A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106321089A (en) * | 2015-07-08 | 2017-01-11 | 中国石油化工股份有限公司 | Method for judging foam segment of coalbed methane shaft |
| CN107355216A (en) * | 2017-06-30 | 2017-11-17 | 中国电子科技集团公司第三十三研究所 | A kind of well fluid level ripple recognition methods related based on echo |
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|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| RJ01 | Rejection of invention patent application after publication |