CN209858203U - Test device for measuring influence of different sulfate concentrations on oil pipe scaling - Google Patents
Test device for measuring influence of different sulfate concentrations on oil pipe scaling Download PDFInfo
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- CN209858203U CN209858203U CN201921074166.2U CN201921074166U CN209858203U CN 209858203 U CN209858203 U CN 209858203U CN 201921074166 U CN201921074166 U CN 201921074166U CN 209858203 U CN209858203 U CN 209858203U
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Abstract
The utility model discloses a test device for measuring the influence of different sulfate concentrations on oil pipe scaling, which comprises a first air pump, a first quick-opening valve, an air inlet, a detachable joint, a mixture outlet, a pressure sensor, a pressure monitor, a second quick-opening valve, a liquid storage tank, a third quick-opening valve, a small water pump, a liquid flowmeter, a pipeline heater, a second air pump, a fourth quick-opening valve, a gas flowmeter, a mixture inlet, a gas outlet, an emptying valve, an oil pipe, an annular pressurizing area and an outer sleeve; the first air pump is connected with the first quick-opening valve and the air inlet, the pressure sensor is connected with the pressure monitor, the liquid storage tank is sequentially connected with the third quick-opening valve, the small water pump and the liquid flowmeter, and the second air pump is sequentially connected with the fourth quick-opening valve and the gas flowmeter. The utility model discloses can simulate the true operating mode among the oil recovery pipe oil recovery process, the influence of different sulfate concentration of accurate measurement and time to the oil pipe scale deposit.
Description
Technical Field
The utility model belongs to the technical field of the oil field scale control technique and specifically relates to a measure test device of different sulfate concentration to oil pipe scale deposit influence.
Background
The most common oil recovery method is water injection oil recovery because the injected water drives the crude oil in the reservoir to flow, thereby improving the recovery ratio. However, the water injection oil extraction often causes inorganic salt scale, inorganic salt scale deposition and accumulation, organic salt scale mixing, formation silt, corrosive substances and the like, and causes pipeline blockage. The most common inorganic scales are carbonate and sulfate scales, carbonate scales can be treated by conventional acids, and sulfate scales are insoluble in acids and difficult to remove by conventional methods. The solubility of barium sulfate and strontium sulfate in sulfate scale is extremely low, insoluble particles are easily formed and are adsorbed on the inner wall of an oil extraction pipe to form sulfate scale which is difficult to treat, and deposition and blockage of the sulfate scale are one of the most serious problems in the problem of oil field scale. The main reason for the scale formation of the oil production pipe is that a certain amount of scale forming ion solution is subjected to the change of physical and chemical conditions, so that the ion equilibrium state of the solution is destroyed, and finally the scale is formed. Therefore, the method is a problem to be solved for the relation between the circulation time of sulfate ions in the oil pipe and the content of the sulfate ions and the scaling amount, and provides a guiding significance for site descaling operation.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a measure different sulfate concentration to the test device of oil pipe scale deposit influence, the influence of the different sulfate concentrations of measurement to the oil pipe scale deposit that can be accurate reaches the condition of different sulfate concentration scales deposits.
In order to achieve the above object, the utility model adopts the following technical scheme:
a test device for measuring the influence of different sulfate concentrations on oil pipe scaling comprises a first air pump, a first quick-opening valve, an air inlet, a detachable joint, a mixture outlet, a pressure sensor, a pressure monitor, a second quick-opening valve, a liquid storage tank, a third quick-opening valve, a small water pump, a liquid flowmeter, a pipeline heater, a second air pump, a fourth quick-opening valve, a gas flowmeter, a mixture inlet, a gas outlet, an emptying valve, an oil pipe, an annular pressurizing area and an outer sleeve; the first air pump is connected with the first quick-opening valve and the air inlet, the pressure sensor is connected with the pressure monitor, the liquid storage tank is sequentially connected with the third quick-opening valve, the small water pump and the liquid flowmeter, the second air pump is sequentially connected with the fourth quick-opening valve and the gas flowmeter, and the liquid flowmeter and the gas flowmeter are connected with the pipeline heater after being connected in parallel; the mixture outlet is connected with the second quick-opening valve and the liquid storage tank in sequence.
Furthermore, the outer sleeve is sleeved outside the oil pipe, and an annular pressurizing area is arranged between the outer sleeve and the oil pipe.
Furthermore, the upper left part and the lower left part of the outer sleeve are respectively provided with an air inlet and an air outlet.
Further, the diameters of the air inlet and the gas outlet are the same, and the centers of the air inlet and the gas outlet are on the same vertical line.
Further, after air generated by the first air pump passes through the first quick-opening valve, the air enters the annular pressurizing area from the air inlet to be pressurized to the required pressure, and after the test is completed, the pressure in the annular pressurizing area is released through the release valve.
Furthermore, the pressure sensor is arranged at the upper right part of the outer sleeve and used for detecting the pressure value of the annular pressurization area.
Furthermore, the second air pump has half of the power of the first air pump, and the first quick-opening valve, the second quick-opening valve, the third quick-opening valve and the fourth quick-opening valve are four identical quick-opening valves.
Furthermore, the detachable joint adopts a detachable design and is in threaded connection with the oil pipe.
Further, the pipe heater is located outside the pipe, surrounding the pipe, for heating the fluid flowing through the pipe.
Further, the left end of the pipeline heater is connected with the mixture inlet.
Furthermore, the liquid storage tank contains a crude oil mixture formed by crude oil, water, calcium ions, barium ions, strontium ions, sulfate ions and bicarbonate ions.
Further, the pressure provided by the annular pressurization area simulates the pressure of a stratum feeding oil pipe when the oil extraction pipe extracts oil; the pipeline heater heats the fluid in the pipeline and simulates the temperature contained in the fluid flowing out of the oil production pipe; the mixture in the reservoir simulates mixture flow from bottom to top in the production tubing.
Compared with the prior art, the utility model has the advantages that: (1) the fluid in the pipeline is heated by the pipeline heater, so that the temperature of the fluid under the actual working condition can be truly simulated; (2) by arranging the outer sleeve, the first air pump pressurizes the annular pressurizing area, so that the oil pipe is pressurized, and the pressurized condition of the oil pipe under the actual working condition can be truly simulated; (3) the device is convenient and quick to use, and can well measure the influence of different circulation times and different sulfate ion concentrations of sulfate ions on oil pipe scaling; the mixed liquid fluid is recycled in the whole test process, so that resources are saved.
Drawings
FIG. 1 is a schematic structural diagram of a test apparatus for measuring the influence of different sulfate concentrations on oil pipe scaling according to the present invention;
fig. 2 is a schematic structural view of the outer casing of fig. 1 sleeved on the oil pipe.
In the figure: 1. the system comprises a first air pump, 2, a first quick-opening valve, 3, an air inlet, 4, a detachable joint, 5, a mixture outlet, 6, a pressure sensor, 7, a pressure monitor, 8, a second quick-opening valve, 9, a liquid storage tank, 10, a third quick-opening valve, 11, a small water pump, 12, a liquid flowmeter, 13, a pipeline heater, 14, a second air pump, 15, a fourth quick-opening valve, 16, a gas flowmeter, 17, a mixture inlet, 18, a gas outlet, 19, an emptying valve, 20, an oil pipe, 21, an annular pressurizing area and 22, an outer sleeve.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
As shown in fig. 1 and fig. 2, the test device for measuring the influence of different sulfate concentrations on oil pipe scaling comprises a first air pump 1, a first quick-opening valve 2, an air inlet 3, a detachable joint 4, a mixture outlet 5, a pressure sensor 6, a pressure monitor 7, a second quick-opening valve 8, a liquid storage tank 9, a third quick-opening valve 10, a small water pump 11, a liquid flowmeter 12, a pipeline heater 13, a second air pump 14, a fourth quick-opening valve 15, a gas flowmeter 16, a mixture inlet 17, a gas outlet 18, an air release valve 19, an oil pipe 20, an annular pressurizing area 21 and an outer sleeve 22; the first air pump 1 is connected with the first quick-opening valve 2 and the air inlet 3, the pressure sensor 6 is connected with the pressure monitor 7, the liquid storage tank 9 is sequentially connected with the third quick-opening valve 10, the small water pump 11 and the liquid flowmeter 12, the second air pump 14 is sequentially connected with the fourth quick-opening valve 15 and the gas flowmeter 16, and the liquid flowmeter 12 and the gas flowmeter 16 are connected with the pipeline heater 13 after being connected in parallel; the mixture outlet 5 is connected with a second quick-opening valve 8 and a liquid storage tank 9 in sequence.
The liquid storage tank contains a crude oil mixture formed by crude oil, water, calcium ions, barium ions, strontium ions, sulfate ions and acid hydrogen radical ions, the basic components of the crude oil mixture are the same as those of a mixture extracted by an actual oil pipe on site, but the contents of anions and cations are different.
As shown in fig. 1 and 2, when it is necessary to measure the influence of different sulfate concentrations on the scaling of the oil pipe on the crude oil mixture with a sulfate ion concentration of 3g/L in the stock tank 9, the first quick-opening valve 2 and the atmospheric valve 19 are closed, the second quick-opening valve 8, the third quick-opening valve 10 and the fourth quick-opening valve 15 are opened, the small-sized water pump 11 and the second air pump 14 are sequentially opened, the crude oil mixture in the stock tank 9 is pressurized by the small-sized water pump 11, and the gas flowing out of the gas flowmeter 16 after being measured by the liquid flowmeter 12 is heated by the pipe heater 13 when flowing in the pipe. After heating, the mixture enters the oil pipe 20 from the mixture inlet 17, the crude oil mixture and the gas flow together from bottom to top in the oil pipe 20, finally the crude oil mixture flows out of the oil pipe 20 from the mixture outlet 5 and then flows back to the liquid storage tank 9 for reuse, and a circulation loop is formed. And then, the first air pump 1 and the first quick-opening valve 2 are opened, the frequency of the first air pump 1 and the opening degree of the first quick-opening valve 2 are adjusted, gas generated by the first air pump 1 enters the annular pressurizing area 21 from the air inlet 3 after passing through the first quick-opening valve 2, the pressure at the annular pressurizing area 21 is increased along with the increase of the gas, the value measured by the pressure sensor 6 is detected by the pressure monitor 7, and when the detected pressure value is the design pressure, the first quick-opening valve 2 and the first air pump 1 are closed in sequence, so that the pressure in the annular pressurizing area 21 is the design pressure. The crude oil mixture in the storage tank 9 is circulated in the oil pipe 20 together with the gas for 1 day.
After the circulation flow is finished, the small-sized water pump 11, the second air pump 14, the third quick-opening valve 10, the fourth quick-opening valve 15 and the second quick-opening valve 8 are closed in sequence; the detachable joint 4 is then opened and the amount of scale in the tubing 20 is measured using a laser scanning rangefinder (not shown). And then the detachable joint 4 is installed, the steps are repeated for circulating flow for 2 days, 3 days, 4 days, 5 days and 6 days according to the cycle time designed by the test, and the scaling amount in the oil pipe 20 corresponding to each cycle time is measured by using a laser scanning distance meter.
And then, sequentially adjusting the crude oil mixture with sulfate ion contents of 6g/L, 9g/L, 12g/L and 15g/L in the liquid storage tank 9, and respectively repeating the steps with the cycle time of 1 day, finally measuring the scaling amount in the oil pipe 20 under the condition of corresponding different ion contents by using a laser scanning distance meter, making corresponding records, sorting data, drawing a change curve between the scaling amounts in the oil pipe 20 along with the increase of the cycle time under the condition of 3g/L sulfate ion concentration, drawing different sulfate concentrations, namely a relation curve between the different sulfate ion contents in the liquid storage tank 9 and the scaling amounts in the oil pipe 20, and ending the whole measuring and testing process.
The utility model discloses can be real simulation oil production pipe at the true operating mode of oil recovery in-process, measure the back to the sulfate content in the crude oil mixture of on-the-spot production, can predict the interior scale deposit condition of oil pipe through the contrast of above-mentioned relation curve, carry out the scale control operation to the scene and provide the guide meaning.
Claims (7)
1. The utility model provides a measure different sulfate concentration and to oil pipe scale deposit test device who influences which characterized in that: the testing device comprises a first air pump (1), a first quick-opening valve (2), an air inlet (3), a detachable joint (4), a mixture outlet (5), a pressure sensor (6), a pressure monitor (7), a second quick-opening valve (8), a liquid storage tank (9), a third quick-opening valve (10), a small water pump (11), a liquid flowmeter (12), a pipeline heater (13), a second air pump (14), a fourth quick-opening valve (15), a gas flowmeter (16), a mixture inlet (17), a gas outlet (18), an emptying valve (19), an oil pipe (20), an annular pressurizing area (21) and an outer sleeve (22);
the first air pump (1) is connected with the first quick-opening valve (2) and the air inlet (3), the pressure sensor (6) is connected with the pressure monitor (7), the liquid storage tank (9) is sequentially connected with the third quick-opening valve (10), the small water pump (11) and the liquid flowmeter (12), the second air pump (14) is sequentially connected with the fourth quick-opening valve (15) and the gas flowmeter (16), and the liquid flowmeter (12) and the gas flowmeter (16) are connected in parallel and then are connected with the pipeline heater (13); the mixture outlet (5) is connected with a second quick-opening valve (8) and a liquid storage tank (9) in sequence.
2. The test device for measuring the influence of different sulfate concentrations on oil pipe scaling according to claim 1, wherein: the outer sleeve (22) is sleeved outside the oil pipe (20), and an annular pressurizing area (21) is arranged between the outer sleeve (22) and the oil pipe (20).
3. The test device for measuring the influence of different sulfate concentrations on oil pipe scaling according to claim 2, wherein: the left upper part and the left lower part of the outer sleeve (22) are respectively provided with an air inlet (3) and a gas outlet (18).
4. The test device for measuring the influence of different sulfate concentrations on oil pipe scaling according to claim 3, wherein: the diameters of the air inlet (3) and the gas outlet (18) are the same, and the centers of the air inlet and the gas outlet are on the same vertical line.
5. The test device for measuring the influence of different sulfate concentrations on oil pipe scaling according to claim 1, wherein: the pressure sensor (6) is arranged at the upper right part of the outer sleeve (22) and used for detecting the pressure value of the annular pressurization area (21).
6. The test device for measuring the influence of different sulfate concentrations on oil pipe scaling according to claim 1, wherein: the power of the second air pump (14) is half of that of the first air pump (1), and the first quick-opening valve (2), the second quick-opening valve (8), the third quick-opening valve (10) and the fourth quick-opening valve (15) are four same quick-opening valves.
7. The test device for measuring the influence of different sulfate concentrations on oil pipe scaling according to claim 1, wherein: the detachable joint (4) is detachably connected with the oil pipe (20) in a threaded manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921074166.2U CN209858203U (en) | 2019-07-10 | 2019-07-10 | Test device for measuring influence of different sulfate concentrations on oil pipe scaling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921074166.2U CN209858203U (en) | 2019-07-10 | 2019-07-10 | Test device for measuring influence of different sulfate concentrations on oil pipe scaling |
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| CN209858203U true CN209858203U (en) | 2019-12-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921074166.2U Expired - Fee Related CN209858203U (en) | 2019-07-10 | 2019-07-10 | Test device for measuring influence of different sulfate concentrations on oil pipe scaling |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114913755A (en) * | 2021-02-10 | 2022-08-16 | 中国石油天然气股份有限公司 | Scaling simulation device |
-
2019
- 2019-07-10 CN CN201921074166.2U patent/CN209858203U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114913755A (en) * | 2021-02-10 | 2022-08-16 | 中国石油天然气股份有限公司 | Scaling simulation device |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191227 Termination date: 20200710 |
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| CF01 | Termination of patent right due to non-payment of annual fee |