CN211777377U - Accurate metering device for oil field well head liquid production amount and oil production amount - Google Patents
Accurate metering device for oil field well head liquid production amount and oil production amount Download PDFInfo
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- CN211777377U CN211777377U CN202020187906.XU CN202020187906U CN211777377U CN 211777377 U CN211777377 U CN 211777377U CN 202020187906 U CN202020187906 U CN 202020187906U CN 211777377 U CN211777377 U CN 211777377U
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Abstract
The utility model discloses an accurate metering device of liquid measure and oil production volume is produced to oil field well head, include: the oil delivery pipe is used for outputting liquid of oil, water and gas mixture produced by an oil field wellhead after gas-liquid preliminary separation, a one-way valve is arranged on the oil delivery pipe, and a pump is arranged on the oil delivery pipe; the first water content measuring mechanism is arranged at the position, located on the upstream of the one-way valve, of the oil conveying pipe and is used for measuring the water content of liquid in the oil conveying pipe located on the upstream of the one-way valve; the water injection mechanism is communicated to the position, located on the downstream of the one-way valve, of the oil pipeline, and a water meter used for measuring the water injection amount is arranged on the water injection mechanism; and the second water content measuring mechanism is arranged at the position, located at the downstream of the water injection mechanism, on the oil conveying pipe and is used for measuring the water content of liquid in the oil conveying pipe located at the downstream of the water injection mechanism. The utility model discloses have accurate measurement moisture content, and then measure the beneficial effect that the liquid measure and oil production were produced to the well head.
Description
Technical Field
The utility model relates to an oil field well head output measurement field. More specifically speaking, the utility model relates to an accurate metering device of liquid measure and oil production volume is produced to oil field well head.
Background
In oil production, in order to accurately know the production change condition of an oil-gas well, carry out production analysis and dynamic analysis, reasonably control and coordinate the production process, and adjust various development indexes in time, various parameters in the production process need to be measured continuously or periodically, oil-gas-water metering is the work which is necessary to be carried out every shift every day, and the oil-gas-water metering has a special position in oil production. At present, the single-well metering methods which are used in domestic oil fields mostly are separator automatic glass tube metering, artificial glass tube metering, oil well metering vehicles, tipping bucket metering devices, double-volume metering devices, oil well three-phase metering devices, flow meters, electrical engineering drawing metering, water content analysis methods and the like. However, each instrument has its own disadvantages and cannot be applied to all oil field wells as much as possible.
For example, the separator measures oil by taking the produced fluid from over ten wells into the same metering chamber. The oil well metering mode of one set of metering device is shared. The measurement in-process at first falls into liquid, gas two-phase with the oil well output with two-phase measurement separator, then measures the liquid with the glass pipe, and artifical well head sample chemical examination moisture content is with high costs, and is efficient, the oil well that relative liquid measure is high, and the measurement time is short, causes the measuring error great. As currently used
The separator greatly reduces the oil measuring precision under the condition of short oil measuring time of a high-yield well.
The prior metering method and the glass tube liquid level meter for metering the oil have the defects of different degrees; because the glass tube oil metering safety performance is poor, the manual labor intensity is high, the oil metering and blocking of the flow meter are easy, the failure rate is high, and the oil metering time is long.
In the oil field development and production process, the most original and universal metering mode of wellhead yield is that the liquid level of a glass tube measures oil, and when the liquid level of the glass tube measures oil: (1) the labor intensity is high, when oil is measured, the process is reversed firstly, the single well and the inlet and outlet valves of the separator are opened and closed, and after the process is reversed, an operator stares at the glass tube to observe the liquid level rising condition. After the oil is measured, the flow is poured, the liquid level is discharged, the inlet and outlet valves of the single well and the separator are opened and closed, and the waiting time is longer when the low-yield well and the intermittent production well are measured. In some stations, a plurality of people are in the well, especially in double stations, and simultaneously, the glass tube is used for measuring oil, so that the problems of liquid level exceeding and the like are easily caused when the operating personnel are busy; (2) the safety performance is low, and in the use, the glass tube of individual station appears bursting, has the potential safety hazard, appears bursting when the volume of oil, causes the injury to staff's health, and the glass tube appears bursting when not measuring the volume of oil, finds in time to reduce crude oil loss volume, finds out untimely a large amount of crude oil leakage, causes certain economic loss.
Such as: the device can accurately measure the liquid yield of the oil well, but still needs a manual wellhead to sample and test the water content, and the accuracy is still not high.
Such as: the passive control multiphase metering device mainly comprises a tubular cyclone separator, a passive gas-liquid separation controller, a single-phase metering instrument, a computer for data acquisition and processing and the like. The working principle of the device is that the liquid coming from the oil well is efficiently separated into gas phase and liquid phase through the tubular cyclone separator, the liquid level and the gas-liquid pressure difference are automatically controlled by the passive controller, and the separated gas and liquid pass through the gas metering instrument and the liquid phase metering instrument to realize the accurate metering of the gas, the liquid and the water. The computer is used for carrying out data acquisition and processing on the parameters of the metering instrument, so that parameter display of oil, gas and water instantaneous values, accumulated values and the like is realized, and oil, gas and water instantaneous curves, daily production curves, time accumulation and daily accumulation production reports are automatically generated. Meanwhile, the storage and query of production curves and production reports can be realized, but the system is huge and complex.
Such as: the oil is measured by the flow, along with the development and production of the oil field, the oil field is in a high water content development period, the productivity is reduced progressively, the water content is high, the number of interval wells is large, and the oil is measured by the flow meter: (1) the oil measuring time is long, 1-2 hours are carried out on each well, and for a metering station with more single wells, one time of metering for each well every day cannot be guaranteed; (2) the measuring range can not meet the measuring requirement, one measuring station has few wells and more than 20 wells, the yield of some wells is low and is less than the minimum flow range of the flow meter along with the natural decrease of the yield of a single well, and the flow meter is used for measuring the inaccurate yield; (3) the failure rate is high, impurities such as water, sand, salt and the like in crude oil seriously corrode and wear the flow meter, so that running parts of the flow meter are seriously damaged, are frequently blocked, the metering error is large, the yield metering is inaccurate, and the normal running of single-well oil metering is seriously influenced; (4) the mixing of water, gas and oil, i.e. liquid gas, in crude oil results in inaccurate flow rate measurement.
But also the well state itself affects the metering: (1) the metering error is large, particularly for an ultra-heavy oil reservoir, the liquid production amount of an oil well generally fluctuates greatly, no rule exists, the liquid production intermittence phenomenon exists in a low-yield oil well, the intermittence time is different, and the real yield is difficult to obtain by short-time metering. (2) The sampling randomness is strong: because the oil field enters a middle-high water-cut period, the water content of the oil well is high and the fluctuation is large, the randomness of manual sampling is very strong, the accuracy is difficult to obtain, and a real, stable and accurate water content value cannot be obtained. (3) The error of the water content of the crude oil is large by manual sampling and determination: to accurately measure the oil yield of an oil well, the average water content of crude oil must be accurately measured. At present, because the representativeness of manual sampling has great relation with the skill level and the quality of an operator, the oil production and the liquid production of a single well are difficult to accurately measure.
SUMMERY OF THE UTILITY MODEL
It is an object of the present invention to solve at least the above problems and to provide at least the advantages which will be described later.
The utility model discloses it is still another purpose to provide an accurate metering device of liquid measure and oil production volume is produced to the oil field well head, can accurate measurement moisture content, and then measures the well head and produce liquid measure and oil production volume.
In order to realize according to the utility model discloses these objects and other advantages, provide an accurate metering device of oil field well head liquid production volume and oil production volume, include:
the oil delivery pipe is used for outputting liquid of oil, water and gas mixture produced by an oil field wellhead after gas-liquid preliminary separation, a one-way valve is arranged on the oil delivery pipe, and a pump is arranged on the oil delivery pipe;
a first water content measuring mechanism provided at a position on the oil delivery pipe upstream of the check valve, the first water content measuring mechanism being configured to measure a water content of a liquid in the oil delivery pipe upstream of the check valve;
the water injection mechanism is communicated to the position, located on the downstream of the one-way valve, of the oil pipeline, and a water meter used for measuring water injection quantity is arranged on the water injection mechanism;
and the second water content measuring mechanism is arranged at the position, located at the downstream of the water injection mechanism, on the oil conveying pipe and is used for measuring the water content of the liquid in the oil conveying pipe located at the downstream of the water injection mechanism.
Preferably, the water injection device further comprises a heating mechanism for heating the water in the water injection mechanism.
Preferably, the first moisture measuring means and the second moisture measuring means are both crude oil moisture analyzers.
Preferably, the water injection mechanism comprises a water injection pipe communicated to the oil delivery pipe and a flowmeter arranged on the water injection pipe, and the water injection pipe is communicated with a water supply pipe network.
Preferably, the oil delivery pipe between the downstream of the water injection mechanism and the second water content measuring mechanism is formed by sequentially and hermetically connecting a first straight pipe, a pipe body with a spiral axis and a second straight pipe.
Preferably, the pitch of the pipe body is larger than the diameters of the first straight pipe and the second straight pipe.
The utility model discloses at least, include following beneficial effect: through setting up the liquid mixture in the oil pipe around preventing the water injection through setting up the check valve, then through the moisture content of the liquid in the oil pipe around detecting the water injection, the measurement detection method of moisture content is very ripe in prior art, and the measuring result is also very accurate, consequently utilizes the moisture content and can accurately know liquid production volume and oil production volume through the simple conversion of conventional mathematical formula. Compared with a method for directly measuring the liquid production amount and the oil production amount, the device is simpler and more accurate in result.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
Fig. 1 is a schematic structural diagram of the metering device according to one embodiment of the present invention;
fig. 2 is a detailed view of the tube body of the metering device according to one embodiment of the present invention.
Detailed Description
The present invention is further described in detail below with reference to the drawings so that those skilled in the art can implement the invention with reference to the description.
It should be noted that in the description of the present invention, the terms indicating the orientation or the positional relationship are based on the orientation or the positional relationship shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the indicated device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
As shown in fig. 1-2, the utility model provides an accurate metering device of liquid measure and oil production volume is produced to oil field well head, include:
the oil delivery pipe 1 is used for outputting liquid of oil, water and gas mixture produced by an oil field wellhead after gas-liquid preliminary separation, the oil delivery pipe 1 is provided with a one-way valve 2, and the oil delivery pipe 1 is provided with a pump; in the oil extraction process of the oil field, a pumping unit is generally adopted to pump out a mixture of oil, water and gas from a well head, the mixture is subjected to gas-liquid primary separation, liquid is output by an oil pipeline 1, and the total amount of the liquid is the liquid production amount of the well head of the oil field.
A first water content measuring mechanism 3 provided at a position on the oil pipe 1 upstream of the check valve 2, the first water content measuring mechanism 3 being configured to measure a water content of the liquid in the oil pipe 1 upstream of the check valve 2; the first moisture measuring means 3 may employ a crude oil moisture analyzer.
The water injection mechanism 4 is communicated to the position, located on the downstream of the one-way valve 2, of the oil pipeline 1, and a water meter 5 used for measuring water injection quantity is arranged on the water injection mechanism 4; the water meter 5 may be a flow meter that detects the flow rate of water, detects the cumulative injection amount of water, and the like, and the water injection mechanism 4 is used to mix water into the oil pipeline 1 so that the water content of the liquid in the oil pipeline 1 downstream of the water injection mechanism 4 is different.
And a second water content measuring means 6 provided at a position on the oil pipe 1 downstream of the water injection means 4, the second water content measuring means 6 being configured to measure a water content of the liquid in the oil pipe 1 downstream of the water injection means 4. The second moisture measuring means 6 may employ a crude oil moisture analyzer.
In above-mentioned technical scheme, through setting up check valve 2 and preventing the liquid mixture in the defeated oil pipe 1 around the water injection, then through the moisture content of the liquid in detecting defeated oil pipe 1 around the water injection, the measurement detection method of moisture content is very ripe among the prior art, and the measuring result is also very accurate, consequently utilizes the moisture content and can accurately know liquid production volume and oil production volume through the simple conversion of conventional mathematical formula. Can overcome the defects of inaccurate measurement of the liquid production amount and the oil production amount by direct measurement, and the metering device is simpler.
Such as: the water content of the liquid measured by the first water content measuring mechanism 3 installed at the wellhead is Y10;
the water injection amount of the water injection mechanism 4 is Z1;
the water content of the liquid after water injection measured by the second water content measuring mechanism 6 is Y11;
through simple mathematical conversion, the liquid production amount is set to be X1, and the oil production content at the front end of the check valve 2 is X1(1-Y10)
The oil production content at the rear end of the check valve 2 is (X1+ Z1) (1-Y11)
The oil production of the single well is not changed in the single well metering process, namely the oil production before and after the check valve 2 is the same, so the oil production of the single well is not changed in the single well metering process, and the oil production of the single well is not changed in the single well metering process, namely the oil production before and after the check valve 2
X1(1-Y10)＝(X1+Z1)(1-Y11)。
In another technical scheme, the water injection device further comprises a heating mechanism which is used for heating the water in the water injection mechanism 4. After the hot water is injected, the uniform mixing speed of the water and the liquid in the oil pipeline 1 can be accelerated, and the consistency of the liquid can be reduced, thereby being beneficial to conveying.
In another technical scheme, the first water content measuring mechanism 3 and the second water content measuring mechanism 6 are both crude oil water content analyzers. For example, the microwave crude oil water content analyzer is a non-contact testing method, which can better prevent the influence of corrosion and the like of crude oil on a sensor, has wide testing range, firm, small and exquisite testing system, easy carrying, small radiation influence on a human body, and is in a leading position in the aspects of testing precision, operation stability, installation mode and the like. The measurement range of the water content analyzer is 0-100%, and the oil with high water content can be accurately measured regardless of thick oil or oil with high water content.
In another technical scheme, the water injection mechanism 4 comprises a water injection pipe communicated to the oil delivery pipe 1 and a flowmeter arranged on the water injection pipe, and the water injection pipe is communicated with a water supply pipe network. The water injection mechanism 4 is simple, easy to construct, low in cost and accurate in metering.
In another technical scheme, the oil delivery pipe 1 positioned between the downstream of the water injection mechanism 4 and the second water content measuring mechanism 6 is formed by sequentially and hermetically connecting a first straight pipe 11, a pipe body 12 with a spiral axis and a second straight pipe 13. After water is injected, the spiral pipe body 12 can promote the mixing of water and liquid in the oil conveying pipe 1 due to the action of gravity, and the accurate measurement of the water content is facilitated.
In another technical solution, the pitch of the pipe body 12 is larger than the diameter of the first straight pipe 11 and the second straight pipe 13. Increasing the pitch is beneficial for reducing the delivery pressure.
While the embodiments of the invention have been described above, it is not intended to be limited to the details shown, or described, but rather to cover all modifications, which would come within the scope of the appended claims, and all changes which come within the meaning and range of equivalency of the art are therefore intended to be embraced therein.
Claims (6)
1. Accurate metering device of oil field well head liquid production volume and oil production volume, its characterized in that includes:
the oil delivery pipe is used for outputting liquid of oil, water and gas mixture produced by an oil field wellhead after gas-liquid preliminary separation, a one-way valve is arranged on the oil delivery pipe, and a pump is arranged on the oil delivery pipe;
a first water content measuring mechanism provided at a position on the oil delivery pipe upstream of the check valve, the first water content measuring mechanism being configured to measure a water content of a liquid in the oil delivery pipe upstream of the check valve;
the water injection mechanism is communicated to the position, located on the downstream of the one-way valve, of the oil pipeline, and a water meter used for measuring water injection quantity is arranged on the water injection mechanism;
and the second water content measuring mechanism is arranged at the position, located at the downstream of the water injection mechanism, on the oil conveying pipe and is used for measuring the water content of the liquid in the oil conveying pipe located at the downstream of the water injection mechanism.
2. The apparatus of claim 1 further comprising heating means for heating the water in the injection means.
3. The apparatus of claim 1 wherein the first moisture measuring mechanism and the second moisture measuring mechanism are each a crude oil moisture analyzer.
4. The device for accurately measuring the liquid and oil production of the oil field wellhead according to claim 1, wherein the water injection mechanism comprises a water injection pipe communicated to the oil pipeline and a flow meter arranged on the water injection pipe, and the water injection pipe is communicated with a water supply pipe network.
5. The device for accurately measuring the liquid production and the oil production of the oil field wellhead according to claim 1, wherein an oil delivery pipe between the downstream of the water injection mechanism and the second water content measuring mechanism is formed by sequentially and hermetically connecting a first straight pipe, a pipe body with a spiral axis and a second straight pipe.
6. The apparatus of claim 5 wherein the pipe body has a pitch greater than the diameter of the first and second straight pipes.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020187906.XU CN211777377U (en) | 2020-02-20 | 2020-02-20 | Accurate metering device for oil field well head liquid production amount and oil production amount |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020187906.XU CN211777377U (en) | 2020-02-20 | 2020-02-20 | Accurate metering device for oil field well head liquid production amount and oil production amount |
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| CN211777377U true CN211777377U (en) | 2020-10-27 |
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| CN202020187906.XU Expired - Fee Related CN211777377U (en) | 2020-02-20 | 2020-02-20 | Accurate metering device for oil field well head liquid production amount and oil production amount |
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- 2020-02-20 CN CN202020187906.XU patent/CN211777377U/en not_active Expired - Fee Related
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