CN202039840U - Working fluid level device for oil well annular gas injection test - Google Patents
Working fluid level device for oil well annular gas injection test Download PDFInfo
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- CN202039840U CN202039840U CN201120160956XU CN201120160956U CN202039840U CN 202039840 U CN202039840 U CN 202039840U CN 201120160956X U CN201120160956X U CN 201120160956XU CN 201120160956 U CN201120160956 U CN 201120160956U CN 202039840 U CN202039840 U CN 202039840U
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- valve
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- annular space
- oil well
- gas
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- 239000012530 fluid Substances 0.000 title claims abstract description 44
- 239000003129 oil well Substances 0.000 title claims abstract description 40
- 238000012360 testing method Methods 0.000 title claims abstract description 37
- 238000002347 injection Methods 0.000 title claims abstract description 34
- 239000007924 injection Substances 0.000 title claims abstract description 34
- 239000007789 gas Substances 0.000 claims abstract description 72
- 239000011261 inert gas Substances 0.000 claims abstract description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 28
- 238000012545 processing Methods 0.000 claims description 17
- 238000012544 monitoring process Methods 0.000 claims description 14
- 229910052757 nitrogen Inorganic materials 0.000 claims description 14
- 238000009434 installation Methods 0.000 claims description 2
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Abstract
An oil well annulus gas injection test working fluid level device, comprising: the gas transmission pipeline is communicated with the annular space between the sleeve and the oil pipe; the first valve, the second valve and the third valve are sequentially arranged on the gas transmission pipeline along the direction far away from the annular space; the inert gas source is connected with one end of a connecting hose, and the other end of the connecting hose is connected with a gas transmission pipeline between the second valve and the third valve; the temperature monitor and the pressure monitor are arranged in the gas transmission pipeline between the first valve and the second valve; and the flow monitor is arranged on the connecting hose to accurately and conveniently obtain the parameter value required by the annular gas injection test working fluid level of the heavy oil well, and further calculate the working fluid level height of the oil well.
Description
Technical field
The utility model relates to a kind of producing fluid level testing arrangement, relates in particular to a kind of oil well annular space gas injection test producing fluid level device.
Background technology
In oil field development, the well fluid level data are important oil well production managerial datas, and it is directly reacting the fluid supply capacity of oil well.The conventional method of well fluid level test is an echo method, this method is to utilize medicine bullet blast sounding or gas cylinder as sound source at well head, the vibration wave that produces is propagated downwards along the annular space in oil pipe, the sleeve pipe, run into liquid level and produce back wave, utilize the well head microphone to receive back wave and calculate the degree of depth of liquid level.This method technology is simple, enforcement is convenient, but in gas-oil ratio in the higher or viscous crude producing well, because " foam section " or " dead oil piece " that casing tube annular space place exists influence, make the test result error of acquisition very big (tens meters are arrived hundreds of rice and do not wait), some heavy oil wells even can't test has influenced the correct evaluation to the field produces well.
Situation at the higher oil well liquid level test of gas liquid ratio, Li Huagui, Chen Jialang (Chen Jialang, Li Huagui, Wang Xuekong, the pumpingh well annular space is intended dense analytic solutions, petroleum journal, 1986 the 1st phases) etc. the people proposed the method for material balance method test oil well annular space place liquid level in 1986, and the recovery situation of this method by test closing well rear sleeve internal pressure curve obtains oil well liquid level.This method is a kind of method of indirectly testing producing fluid level, has measuring accuracy height, characteristics that cost is low.Above-mentioned method of testing is by extracting the gas in the oil pipe annular space, and is poor by different conditions pressure, temperature and the gas volume down that extracting gases repeatedly obtains, and calculates the change curve of producing fluid level, thus the data of acquisition producing fluid level.But this method is long for the pressure restore cycle, gas production is low or anaerogenic heavy oil wells, still can't reach test purpose.
The utility model content
The technical problem that the utility model solves provides a kind of oil well annular space gas injection test producing fluid level device, to obtain oil well annular space gas injection test producing fluid level parameters needed value accurately, easily, calculates dynamic liquid level height.
Technical solution of the present utility model is:
A kind of oil well annular space gas injection test producing fluid level device, wherein, this device comprises:
Air delivering pipeline is communicated with annular space between sleeve pipe and the oil pipe;
First valve, second valve and the 3rd valve are successively set on the described air delivering pipeline along the direction away from described annular space;
Inert gas source, an end that is connected flexible pipe with connects, and the other end of this connection flexible pipe is connected with the air delivering pipeline between described second valve and the 3rd valve;
Temperature monitor and pressure monitor are arranged in the air delivering pipeline between described first valve and second valve;
Flow monitoring instrument is arranged on the described connection flexible pipe.
Above-mentioned oil well annular space gas injection test producing fluid level device, wherein, this device also comprises data acquisition processing system, described data acquisition processing system is connected with described temperature monitor, pressure monitor and flow monitoring instrument.
Above-mentioned oil well annular space gas injection test producing fluid level device, wherein, described inert gas source is a nitrogen cylinder.
Above-mentioned oil well annular space gas injection test producing fluid level device, wherein, described data acquisition processing system includes computer, and described computer installation has A/D modular converter, producing fluid level data processing module and output display module.
Learn that by above explanation the utility model can reach following effect compared with prior art really:
A kind of well fluid level tester for testing of the present utility model, adopt oil well annular space nitrogen injection technique, and utilize the equation of gas state and material balance theory to find the solution the dynamic liquid level height of oil well, solve because no matter the test error that influence caused of " foam section " or " dead oil piece " is that thin oil well or heavy oil wells can both realize accurate measurement.
The utility model has improved measuring accuracy greatly, and this method construction technology is simple, calculate accurately, has solved the problem that exists in the heavy oil wells producing fluid level test process, for the test of heavy crude well producing fluid level has indicated new direction.
Description of drawings
Fig. 1 is the structural representation of the utility model oil well annular space gas injection test producing fluid level device.
The critical element label declaration:
1: oil pipe 2: sleeve pipe 3: wellhead assembly
6: the three valves of 5: the second valves of 4: the first valves
7: data acquisition processing system 8: flow monitoring instrument 9: air delivering pipeline
10: connect flexible pipe 11: nitrogen cylinder 12: temperature monitor
13: pressure monitor
The specific embodiment
A kind of oil well annular space gas injection test producing fluid level device comprises: air delivering pipeline is communicated with annular space between sleeve pipe and the oil pipe; First valve, second valve and the 3rd valve are successively set on the described air delivering pipeline along the direction away from described annular space; Inert gas source, an end that is connected flexible pipe with connects, and the other end of this connection flexible pipe is connected with the air delivering pipeline between described second valve and the 3rd valve; Temperature monitor and pressure monitor are arranged in the air delivering pipeline between described first valve and second valve; Flow monitoring instrument is arranged on the described connection flexible pipe.
Understand for technical characterictic of the present utility model, purpose and effect being had more clearly, now contrast the description of drawings specific embodiment of the present utility model.
As shown in Figure 1, be a kind of oil well annular space gas injection test producing fluid level device of the present utility model, it mainly comprises: a plurality of valves on air delivering pipeline 9, the air delivering pipeline, inert gas source, temperature monitor 12, pressure monitor 13 and flow monitoring instrument 8; Air delivering pipeline 9 is arranged on the wellhead assembly 3, and is communicated with annular space between sleeve pipe 2 and the oil pipe 1; Gas in the air delivering pipeline 9 mainly comprises the inert gas that the interior anger certainly that is produced of the annular space between sleeve pipe 2 and the oil pipe 1 and this device are imported; First valve 4, second valve 5 and the 3rd valve 6 on the air delivering pipeline 9, be successively set on the air delivering pipeline 9 along direction away from described annular space, can form a plurality of airtight spaces, in order to the status datas such as temperature, pressure and volume of measurement gas quantitatively; Inert gas source, an end that is connected flexible pipe 10 with one connects, the other end of connection flexible pipe 10 is communicated with the air delivering pipeline 9 between second valve 5 and the 3rd valve 6, by connecting flexible pipe 10, inert gas source can pour into inert gas in the air delivering pipeline 9, and further be input in the annular space between oil pipe 1 and the sleeve pipe 2, form mist, in order to make up the gas system under the different conditions; Temperature monitor 12 and pressure monitor 13 are arranged in the air delivering pipeline 9 between first valve 4 and second valve 5; Flow monitoring instrument 8 is arranged on the connection flexible pipe 10, and the monitor of above-mentioned multiple parameter is in order to measure the state parameter of the gas in the air delivering pipeline 9.
Oil well annular space gas injection test producing fluid level device of the present utility model, preferably, inert gas source adopts nitrogen cylinder 11, to provide nitrogen as the gas that pours in the annular space.
Further, oil well annular space gas injection test producing fluid level device of the present utility model also includes data acquisition processing system 7, and data acquisition processing system 7 is connected with described temperature monitor 12, pressure monitor 13 and flow monitoring instrument 8.Preferably, described data acquisition processing system 7 includes computer, is provided with A/D modular converter, producing fluid level data processing module and output display module in the computer; Measured data in the monitor are carried out analog-to-digital conversion by the A/D modular converter in the computer, digital data transmission are calculated in the producing fluid level data processing module again, according to the calculation procedure of setting, calculate the height of producing fluid level; Then result of calculation is shown via the output display module.And can comprise plurality of display modes in the output display module, for example data form, block diagram, highly-time plot etc.
Oil well annular space gas injection of the present utility model test producing fluid level device with the mould/number conversion of the survey data in the monitor via necessity after, the input computer system, in computer, be provided with the producing fluid level data processing module, the data that test obtains are imported the producing fluid level data that just can obtain needs in this calculation procedure.And producing fluid level calculating principle of the present utility model is as follows:
The utility model is to utilize the equation of gas state and material balance theory to find the solution the dynamic liquid level height of oil well.
The gas system of at first getting in the annular space is studied, and this gas system comprises all gas in the annular space.If injecting the volume flow of this system gas (nitrogen) is Q
1, the long-pending flow of oil well self generating gas is Q
2, according to gas equation as can be known:
PV＝nRTZ＝(w/M)RTZ (1)
That is: w=PVM/RTZ (2)
In the formula: p---the absolute pressure of gas, kPa;
The volume of v---gas, m
3
The molal quantity of n---gas, mol;
The quality of w---gas, kg;
The absolute average temperature of T---gas, K;
R---gas constant, R=8.314kJ/ (kmolK);
The molecular weight of M---gas;
Z---gas compressibility factor.
Simultaneously divided by time t, above-mentioned equation then is converted into the state equation of the mass flow and the volume flow of gas by quality, volume parameter, that is: with equation (2) both sides
G＝PQM/RTZ (3)
In the formula: G---the mass flow of gas, kg/s;
The volume flow of Q---gas, m
3/ s;
Utilize the BWRS state equation that equation (3) is scaled state equation under the standard state, this moment, Q was the volume flow under the standard state, and Z=1 then has:
G＝Q
st(P
stM)/(RT
st) (4)
In the formula: Q
St---be converted to the standard state volumetric flow of gas in following time, m
3/ s;
P
St---the gas pressure in standard state following time, kPa;
T
St---the gas temperature in standard state following time, K;
By material balance principle, the mass flow that flows into system equals this intrasystem quality rate over time, and this variation can show by temperature, the pressure of test.
In the formula:
Q
1stP
StM
1/ RT
1stZ
1---normal state of gas equation, wherein Q during for gas injection
1st, M
1, T
1st, Z
1Be known quantity.
Q
2stP
StM
2/ RT
2stZ
2---for oil well under the standard state from the angry equation of gas state, wherein Q
2st, M
2, T
2st, Z
2Be known quantity.
D[PVM/RTZ]/dt---be the mass change amount of system, wherein P, T can record, and M can be by learning the gas component analytical test.
Two unknown quantity V, Z are arranged in the formula, therefore, gas injection rate and spontaneous tolerance in several pressure, temperature gradient change procedure and the annular space that records by oil well annular space gas injection of the present utility model test producing fluid level device, and further according to gas-oil ratio, the gas group of the oil well parameter correction of grading, can calculate oil well annular volume V, and then try to achieve annular space height, the i.e. true dynamic liquid level height of oil well.
At the aforementioned calculation principle, wherein a kind of preferable measuring process of oil well annular space gas injection test producing fluid level device of the present utility model is as follows:
Consult Fig. 1, the experimental rig of the utility model oil well annular space gas injection test producing fluid level mainly is made up of first valve 4, second valve 5, the 3rd valve 6, wellhead assembly 3, data acquisition processing system 7, nitrogen cylinder 11, connection flexible pipe 10 and temperature monitor 12, pressure monitor 13, flow monitoring instrument 8.
Before the annular space nitrogen injection, first, second, third valve opening is stablized a period of time, and utilizes temperature monitor 12 and pressure monitor 13 probe temperatures, force value, utilizes the initial relevant gaseous state parameter of computer 7 records.Close first, second, third valve, slowly open the air valve that unloads on the nitrogen cylinder 11 then, check the sealing that connects between flexible pipe 10 and the air delivering pipeline 9 by the numerical value change of observing on the pressure monitor 13.
When the annular space nitrogen injection of beginning between air delivering pipeline 9 and oil pipe 1 and sleeve pipe 2, at first open first valve 4 and second valve 5, close the 3rd valve 6, open the air valve that unloads on the nitrogen cylinder 11, observe the parameter of flow monitoring instrument 8, and adjust to a default gas injection speed.After nitrogen was injected into annular space between oil pipe 1 and the sleeve pipe 2, monitoring was also gathered the signal numerical value of gas injection flow monitoring instrument 8, temperature monitor 12 and pressure monitor 13; Adopt and use the same method, adjust several different notes vapour gaseous states repeatedly, and monitoring and write down the variable quantity of temperature, pressure and the nitrogen flow of these gas injection gaseous states.
After gas injection is finished, utilize computer the data that collect under several gas injection states to be handled (flow utilizes the BWRS equation to be converted to flow under the standard state), parameters such as further gas-oil ratio to oil well, gas component, casing tube size are revised, and utilize data acquisition processing system of the present utility model to calculate the true producing fluid level of oil well.
The above only is the schematic specific embodiment of the utility model, is not in order to limit scope of the present utility model.Any those skilled in the art, equivalent variations of having done under the prerequisite that does not break away from design of the present utility model and principle and modification all should belong to the scope that the utility model is protected.
Claims (4)
1. the producing fluid level device is tested in an oil well annular space gas injection, it is characterized in that this device comprises:
Air delivering pipeline is communicated with annular space between sleeve pipe and the oil pipe;
First valve, second valve and the 3rd valve are successively set on the described air delivering pipeline along the direction away from described annular space:
Inert gas source, an end that is connected flexible pipe with connects, and the other end of this connection flexible pipe is connected with the air delivering pipeline between described second valve and the 3rd valve;
Temperature monitor and pressure monitor are arranged in the air delivering pipeline between described first valve and second valve;
Flow monitoring instrument is arranged on the described connection flexible pipe.
2. oil well annular space gas injection test producing fluid level device as claimed in claim 1 is characterized in that this device also comprises data acquisition processing system, and described data acquisition processing system is connected with described temperature monitor, pressure monitor and flow monitoring instrument.
3. oil well annular space gas injection test producing fluid level device as claimed in claim 1 is characterized in that described inert gas source is a nitrogen cylinder.
4. oil well annular space gas injection test producing fluid level device as claimed in claim 2 is characterized in that described data acquisition processing system includes computer, and described computer installation has A/D modular converter, producing fluid level data processing module and output display module.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120160956XU CN202039840U (en) | 2011-05-19 | 2011-05-19 | Working fluid level device for oil well annular gas injection test |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120160956XU CN202039840U (en) | 2011-05-19 | 2011-05-19 | Working fluid level device for oil well annular gas injection test |
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| Publication Number | Publication Date |
|---|---|
| CN202039840U true CN202039840U (en) | 2011-11-16 |
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|---|---|---|---|
| CN201120160956XU Expired - Lifetime CN202039840U (en) | 2011-05-19 | 2011-05-19 | Working fluid level device for oil well annular gas injection test |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105089591A (en) * | 2015-06-19 | 2015-11-25 | 中国石油天然气股份有限公司 | Method for determining annular gas-liquid interface of steam injection well |
| CN105484733A (en) * | 2015-12-14 | 2016-04-13 | 中国石油天然气股份有限公司 | Gas-liquid interface depth testing method and device |
| CN108487901A (en) * | 2018-05-23 | 2018-09-04 | 大庆市亿动科技有限公司 | Oil well multi-functional automatic liquid level monitor based on velocity of sound sensor |
| CN114622897A (en) * | 2020-12-10 | 2022-06-14 | 中国石油天然气股份有限公司 | Method and device for detecting working fluid level depth |
-
2011
- 2011-05-19 CN CN201120160956XU patent/CN202039840U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105089591A (en) * | 2015-06-19 | 2015-11-25 | 中国石油天然气股份有限公司 | Method for determining annular gas-liquid interface of steam injection well |
| CN105089591B (en) * | 2015-06-19 | 2017-09-01 | 中国石油天然气股份有限公司 | Method for determining annular gas-liquid interface of steam injection well |
| CN105484733A (en) * | 2015-12-14 | 2016-04-13 | 中国石油天然气股份有限公司 | Gas-liquid interface depth testing method and device |
| CN105484733B (en) * | 2015-12-14 | 2019-08-06 | 中国石油天然气股份有限公司 | gas-liquid interface depth testing method and device |
| CN108487901A (en) * | 2018-05-23 | 2018-09-04 | 大庆市亿动科技有限公司 | Oil well multi-functional automatic liquid level monitor based on velocity of sound sensor |
| CN114622897A (en) * | 2020-12-10 | 2022-06-14 | 中国石油天然气股份有限公司 | Method and device for detecting working fluid level depth |
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Granted publication date: 20111116 |
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| CX01 | Expiry of patent term |