CN117846555B - Polymer injection allocation skid-mounted integrated device and method - Google Patents
Polymer injection allocation skid-mounted integrated device and method Download PDFInfo
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- CN117846555B CN117846555B CN202410231520.7A CN202410231520A CN117846555B CN 117846555 B CN117846555 B CN 117846555B CN 202410231520 A CN202410231520 A CN 202410231520A CN 117846555 B CN117846555 B CN 117846555B
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- 238000002347 injection Methods 0.000 title claims abstract description 205
- 239000007924 injection Substances 0.000 title claims abstract description 205
- 229920000642 polymer Polymers 0.000 title claims abstract description 196
- 238000000034 method Methods 0.000 title claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 210
- 239000012452 mother liquor Substances 0.000 claims abstract description 114
- 238000003860 storage Methods 0.000 claims abstract description 71
- 239000008213 purified water Substances 0.000 claims abstract description 68
- 239000003814 drug Substances 0.000 claims abstract description 28
- 239000004815 dispersion polymer Substances 0.000 claims abstract description 14
- 238000012544 monitoring process Methods 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims description 44
- 239000002245 particle Substances 0.000 claims description 33
- 238000011144 upstream manufacturing Methods 0.000 claims description 32
- 238000001914 filtration Methods 0.000 claims description 17
- 238000002156 mixing Methods 0.000 claims description 17
- 238000000746 purification Methods 0.000 claims description 17
- 239000010413 mother solution Substances 0.000 claims description 16
- 239000003795 chemical substances by application Substances 0.000 claims description 13
- 238000005259 measurement Methods 0.000 claims description 13
- 230000003068 static effect Effects 0.000 claims description 13
- 238000003756 stirring Methods 0.000 claims description 13
- 230000002159 abnormal effect Effects 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 8
- 239000000243 solution Substances 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 6
- 238000001746 injection moulding Methods 0.000 claims description 5
- 238000010008 shearing Methods 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 4
- 238000006116 polymerization reaction Methods 0.000 claims description 3
- 230000003139 buffering effect Effects 0.000 claims description 2
- 238000011049 filling Methods 0.000 claims description 2
- 238000009825 accumulation Methods 0.000 claims 1
- 239000003921 oil Substances 0.000 description 13
- 239000002775 capsule Substances 0.000 description 4
- 230000010354 integration Effects 0.000 description 3
- 238000004220 aggregation Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 229940079593 drug Drugs 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
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- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The invention relates to a polymer injection allocation skid-mounted integrated device and method, and belongs to the technical field of oilfield injection allocation. Comprising the following steps: the integrated control sled, the medicine storage device, the produced water buffer device, the produced water treatment device, the purified water output device, the storage gathering sled, the polymer dispersing sled, the mother liquor output device, the injection gathering device and the electric control valve; according to the invention, the detachable integrated control pry, the polymer storage pry, the polymer dispersion pry and the mother liquor pry are arranged, so that the problem that the traditional fixed device is difficult to detach and can be reused is solved, and the polymer injection allocation cost is reduced; the injection allocation scheme can be manually set through the injection allocation control panel, so that automation of polymer injection allocation is realized, and a polymer injection allocation method is simplified; the integrated monitoring and automatic flow regulation of the flow and pressure conditions of each device can be realized through the connection of the injection allocation control panel and the electric control valve at each device, and the injection allocation efficiency is greatly improved.
Description
Technical Field
The invention belongs to the technical field of oil field injection allocation, and particularly relates to a polymer injection allocation skid-mounted integrated device and method.
Background
Polymer flooding is a common measure for effectively increasing the yield of crude oil in oil fields. By injecting the polymer solution, the viscosity of the water phase can be increased, the oil-water fluidity ratio can be improved, the displacement front can be more stable, and the crude oil recovery ratio can be further improved. Most of the eastern high-water-content oil fields in China are subjected to polymer flooding with different degrees, the recovery ratio is improved by more than 10% on average, and the method is widely applied to foreign oil fields. The polymer injection allocation device and method directly influence the whole injection allocation process of the polymer solution, and have important significance for guaranteeing the implementation of polymer flooding. However, at present, most of traditional polymer flooding injection allocation devices adopted in oil fields are fixed devices, the devices are difficult to recycle after construction is finished, the integration degree of the devices is low, the injection allocation process is influenced, the problems of high investment cost of the devices, complex injection allocation method and the like exist, and the injection allocation cost of the polymer flooding is directly influenced. Therefore, it is necessary to invent a polymer injection allocation device and method with low cost and convenient use.
Based on the analysis, the traditional polymer flooding injection allocation device and method face two main problems: firstly, the injection allocation device is a fixed device, is difficult to disassemble and transport, has low recycling rate and large occupied area, and causes high investment cost of the device; secondly, most of the devices are single devices, the integration level is low, the connection between the devices is not tight enough, and the injection allocation method is complex.
Disclosure of Invention
In order to solve the problems of high investment cost and complex injection allocation method of the traditional polymer flooding injection allocation device and method in the background art, the invention provides the polymer injection allocation skid-mounted integrated device and method.
Term interpretation:
a polymer injection allocation system, which is a control system for the preparation and injection of polymer flooding polymers in oil fields.
The technical scheme of the invention is as follows:
a polymer dispensing skid-mounted integrated device, comprising: the integrated control sled, the medicine storage device, the produced water buffer device, the produced water treatment device, the purified water output device, the storage gathering sled, the polymer dispersing sled, the mother liquor output device, the injection gathering device and the electric control valve;
The medicine storage device and the produced water buffer device are connected with the produced water treatment device, and the produced water treatment device, the purified water output device and the polymer injection device are sequentially connected; the mother liquor pry, the mother liquor delivery device and the polymer injection device are connected in sequence;
The chemical storage device, the produced water buffer device, the produced water treatment device and the purified water external transmission device are all connected on one branch of the upstream of the injection device through pipelines, the produced water treatment chemical stored in the chemical storage device and the oilfield produced water subjected to preliminary treatment in the produced water buffer device are respectively and directly pumped into the produced water treatment device through the pipelines to be stirred and mixed to form mixed produced liquid, purified water is formed after filtration and is stored in the purified water external transmission device, the purified water is pressurized to obtain high-pressure produced water, and the high-pressure produced water enters the injection device through the pipelines and is injected into the wellhead of the injection well;
The polymer storage pry, the polymer dispersion pry, the mother liquor pry and the mother liquor outward conveying device are all connected to the other branch at the upstream of the injection device through pipelines, and the polymer stored in the polymer storage pry and the clear water stored in the polymer dispersion pry are respectively and directly pumped into the polymer dispersion pry through pipelines to be dispersed and dissolved, then enter the mother liquor pry to be cured or stored, and the mother liquor is finally pumped into the injection device through the mother liquor outward conveying device and injected into the wellhead of the injection well;
The integrated control sled is used for monitoring and controlling the whole polymer injection allocation system; the electric control valve is used for monitoring and controlling the flow of each place.
According to the invention, the pipelines of the two branches at the upstream of the polymer injection device are connected with the inlet end of the injection pump in a parallel mode, the pipelines of the drug storage device, the produced water buffer device, the produced water treatment device and the purified water output device are used for treating and boosting the produced water of an oil field, and the pipelines of the polymer storage sled, the polymer dispersion sled, the mother liquor sled and the mother liquor output device are used for preparing polymer mother liquor.
According to the invention, preferably, an injection allocation control panel for controlling the whole polymer injection allocation system is arranged in the integrated control sled;
a medicament storage tank for storing the produced water treatment medicament is arranged in the medicament storage device;
A produced water buffer tank for temporarily storing produced water is arranged in the produced water buffer device;
a stirring device and a filtering device are arranged in the produced water treatment device;
A water purification storage tank and a water purification booster pump are arranged in the water purification output device;
a polymer storage tank for storing the polymer is arranged in the polymer storage sled;
A clean water tank and a static mixer are arranged in the polymer dispersing pry;
a mother liquor tank for storing mother liquor is arranged in the mother liquor sled;
a mother liquor output pump for outputting mother liquor is arranged in the mother liquor output device;
a liquid mixing tank, a quality monitor and an injection pump are arranged in the polymer injection device;
an electric control valve is arranged on the pipeline, and a flowmeter and a pressure gauge are arranged in the pipeline;
The injection allocation control panel is directly connected with the electric control valve through a circuit, and is used for integrally monitoring the pressure and flow conditions of each device in real time and controlling the flow;
The produced water treatment agent stored in the agent storage tank and the oilfield produced water subjected to preliminary treatment in the produced water buffer tank are respectively and directly pumped into the stirring device through pipelines to be stirred and mixed to form mixed produced liquid, the mixed produced liquid is filtered by the filtering device to form purified water, the purified water is stored in the purified water storage tank, the purified water is pressurized by the purified water booster pump to obtain high-pressure produced water, the high-pressure produced water enters the mixed liquid tank through the pipelines, and finally the high-pressure produced water is injected into the wellhead of the injection well through the injection pump;
The polymer stored in the polymer storage tank and clear water in the clear water tank are respectively pumped into the static mixer through pipelines to be dispersed and dissolved, then enter the mother liquor tank to be cured or stored, the mother liquor is finally pumped into the mixed liquor tank through the mother liquor output pump, and finally injected into the wellhead of the injection well through the injection pump;
The quality monitor feeds back the particle size and viscosity change of the mixed liquid in the mixed liquid tank in real time in the injection allocation control panel.
According to the invention, preferably, a curing tank, a primary sub-tank, a secondary sub-tank and a tertiary sub-tank are arranged in the mother liquor tank;
Whether the curing tank is connected into the whole polymer injection allocation system or not is selected by adjusting an electric control valve at the upstream of the curing tank, namely whether curing operation is carried out on the current polymer mother liquor or not;
the first-stage sub-tank, the second-stage sub-tank and the third-stage sub-tank are connected in parallel and are used for storing polymer mother solutions with different particle sizes.
According to the invention, the integrated control pry, the polymer storage pry, the polymer dispersion pry and the mother liquor pry are all movably arranged.
According to the invention, the polymer injection allocation skid-mounted integrated device is provided with a plurality of electric control valves; the specific setting positions comprise: the method comprises the steps of producing water, buffering a tank downstream, a medicament storage tank downstream, a stirring device downstream, a filtering device downstream, a water purification storage tank downstream, a water purification booster pump downstream, a polymer storage tank downstream, a clear water tank downstream, a static mixer downstream, a curing tank parallel branch, a curing tank upstream, a curing tank downstream, a primary sub-tank upstream, a primary sub-tank downstream, a secondary sub-tank upstream, a secondary sub-tank downstream, a tertiary sub-tank upstream, a tertiary sub-tank downstream, a mother liquor external transmission pump downstream and a filling pump upstream.
A polymer injection allocation skid-mounted integrated method, comprising:
(1) Determining injection polymer type
Determining the type of a polymer required by injection allocation according to the requirement of polymer flooding, judging whether curing operation is to be performed on the polymer mother solution, if so, switching the curing tank into a polymer injection allocation system by opening an electric control valve at the upstream of the curing tank, otherwise, opening the electric control valve;
(2) Setting polymer injection scheme
Setting a polymer injection allocation scheme by an injection allocation control panel, wherein the polymer injection allocation scheme comprises injection allocation time, total injection allocation amount, an inter-mother liquor injection allocation ratio, a mother liquor-purified water injection allocation ratio, injection allocation safety pressure, injection allocation safety flow, an injection polymerization particle size range and a shearing measurement range;
(3) Beginning polymer dosing
Mixing produced water treatment agent and oilfield produced water in a stirring device, and mixing polymer and clear water in a static mixer; the produced water treatment agent and the oilfield produced water are mixed and filtered by a filtering device to form purified water which has qualified water quality and does not contain oil drops, floccules and suspended matters, and the purified water is stored in a purified water storage tank; the polymer and the clear water are mixed to form polymer mother liquor, the polymer mother liquor enters a mother liquor tank, if the polymer mother liquor needs to be cured, the polymer mother liquor enters a curing tank for curing, and then enters a primary sub-tank, a secondary sub-tank and a tertiary sub-tank, and if the polymer mother liquor does not need to be cured, the polymer mother liquor directly enters the primary sub-tank, the secondary sub-tank and the tertiary sub-tank; then according to the set mother liquor-purified water injection proportion, the purified water and the polymer mother liquor are pumped into a mixed liquor tank through a purified water booster pump and a mother liquor external pump respectively, and finally injected into the wellhead of the injection well through an injection pump;
(4) Automatic regulation and control of injection allocation process
The flow and the pressure of each electric control valve are monitored in real time through the injection allocation control panel, and the electric control valve at the abnormal position is automatically adjusted to enable the abnormal position to be in accordance with the current injection allocation scheme when the flow and the pressure are abnormal or do not meet the current injection allocation scheme;
The injection allocation control panel is also used for monitoring the particle size and viscosity change of the mixed liquid in the liquid mixing tank through the quality monitor and evaluating the quality of the mixed liquid, after a small amount of mixed liquid enters the quality monitor, the minimum particle size, the maximum particle size and the average particle size of the mixed liquid are obtained through measurement, and then the change condition of the viscosity along with the shear rate is obtained through measurement under the high-speed shear rate.
According to a preferred embodiment of the invention, the dosing polymer is a dry polymer powder or a polymer solution.
According to the invention, the injection allocation control panel realizes the mixing of polymer mother solutions with different particle diameters by respectively controlling the electric control valves at the downstream of the primary sub-tank, the downstream of the secondary sub-tank and the downstream of the tertiary sub-tank; the constant proportion injection of the polymer mother solution and the purified water is realized by respectively controlling the electric control valves at the downstream of the mother solution output pump and the downstream of the purified water booster pump.
The beneficial effects of the invention are as follows:
By arranging the detachable integrated control pry, the polymer storage pry, the polymer dispersion pry and the mother liquor pry, the problem that the traditional fixed device is difficult to detach and can be reused is solved, and the polymer injection allocation cost is reduced; the injection allocation scheme can be manually set through the injection allocation control panel, so that automation of polymer injection allocation is realized, and a polymer injection allocation method is simplified; the integrated monitoring and automatic flow regulation of the flow and pressure conditions of each device can be realized through the connection of the injection allocation control panel and the electric control valve at each device, and the injection allocation efficiency is greatly improved.
Drawings
FIG. 1 is a schematic structural view of a polymer injection molding skid-mounted integrated device;
FIG. 2 is a schematic diagram of the structure of the mother liquor tank;
FIG. 3 is a schematic flow chart of a polymer injection molding skid-mounted integrated process.
In the figure: 1. a control panel for injection allocation; 2. a medicament reservoir tank; 3. a produced water buffer tank; 4. a stirring device; 5. a filtering device; 6. a purified water reservoir tank; 7. a water purification booster pump; 8. a polymer reservoir; 9. a clean water tank; 10. a static mixer; 11. a mother liquor tank; 12. a mother liquor output pump; 13. a liquid mixing tank; 14. a quality monitor; 15. an injection pump; 16. a curing tank; 17. a first-stage sub-tank; 18. a secondary sub-tank; 19. a third sub-tank; 101. an integrated control pry; 102. a drug storage device; 103. a produced water buffer device; 104. a produced water treatment device; 105. a purified water output device; 106. storing the gathering skid; 107. a polymer dispersing pry; 108. prying mother liquor; 109. mother liquor output device; 110. and a polymer injection device.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings and examples, it being apparent that the described embodiments are only some, but not all, of the embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
A polymer dispensing skid-mounted integrated device, as shown in fig. 1, comprising: an integrated control sled 101, a medicine storage device 102, a produced water buffer device 103, a produced water treatment device 104, a purified water output device 105, a storage and aggregation sled 106, a polymer dispersion sled 107, a mother liquor sled 108, a mother liquor output device 109, an injection and aggregation device 110 and an electric control valve;
the medicine storage device 102 and the produced water buffer device 103 are connected with the produced water treatment device 104, and the produced water treatment device 104, the purified water output device 105 and the injection device 110 are connected in sequence; the polymer storage pry 106 and the polymer dispersion pry 107 are connected with the mother liquor pry 108, and the mother liquor pry 108, the mother liquor output device 109 and the polymer injection device 110 are connected in sequence;
The medicine storage device 102, the produced water buffer device 103, the produced water treatment device 104 and the purified water output device 105 are all connected on one branch of the upstream of the injection device 110 through pipelines, the produced water treatment agent stored in the medicine storage device 102 and the oilfield produced water subjected to preliminary treatment in the produced water buffer device 103 are respectively and directly pumped into the produced water treatment device 104 through the pipelines to be stirred and mixed to form mixed produced liquid, purified water is formed after filtration and is stored in the purified water output device 105, the purified water is pressurized through the purified water booster pump 7 to obtain high-pressure produced water, the high-pressure produced water enters the injection device 110 through the pipelines, and finally is injected into an injection well mouth through the injection pump 15;
The polymer storage sled 106, the polymer dispersing sled 107, the mother liquor sled 108 and the mother liquor output device 109 are all connected to the other branch at the upstream of the injection device 110 through pipelines, and the polymer stored in the polymer storage sled 106 and the clear water stored in the polymer dispersing sled 107 are respectively directly pumped into the polymer dispersing sled 107 through the pipelines to be dispersed and dissolved, then enter the mother liquor sled 108 to be cured or stored, and finally the mother liquor is pumped into the injection device 110 through the mother liquor output device 109 and finally injected into the wellhead of the injection well through the injection pump 15;
the integrated control sled 101 is used to monitor and control the entire polymer injection molding system; the electric control valve is used for monitoring and controlling the flow of each place.
Example 2
A polymer injection dispensing skid-mounted integrated device according to embodiment 1, which differs in that:
the pipelines of the two branches at the upstream of the injection device 110 are connected with the inlet end of the injection pump 15 in a parallel mode, the pipelines of the medicine storage device 102, the produced water buffer device 103, the produced water treatment device 104 and the purified water output device 105 are used for treating and boosting the produced water of an oil field, and the pipelines of the medicine storage sled 106, the polymer dispersing sled 107, the mother liquor sled 108 and the mother liquor output device 109 are used for preparing polymer mother liquor.
An injection allocation control panel 1 for controlling the whole polymer injection allocation system is arranged in the integrated control sled 101; a medicine storage tank 2 for storing the produced water treatment medicine is arranged in the medicine storage device 102; a produced water buffer tank 3 for temporarily storing produced water is provided in the produced water buffer 103; the water inlet pipeline of the produced water buffer tank 3 is directly connected with the produced water of the oil field after preliminary treatment; the produced water treatment device 104 is internally provided with a stirring device 4 and a filtering device 5; a water purification storage tank 6 and a water purification booster pump 7 are arranged in the water purification output device 105; a polymer reservoir tank 8 for storing polymer is arranged in the polymer storage sled 106; a clean water tank 9 and a static mixer 10 are arranged in the polymer dispersing sled 107; a mother liquor tank 11 for storing mother liquor is arranged in the mother liquor sled 108; a mother liquor output pump 12 for outputting mother liquor is provided in the mother liquor output device 109; a mixed liquid tank 13, a quality monitor 14 and an injection pump 15 are arranged in the injection device 110; an electric control valve is arranged on the pipeline, and a flowmeter and a pressure gauge are arranged in the pipeline; the injection allocation control panel 1 is directly connected with the electric control valve through a circuit, and is used for integrally monitoring the pressure and flow conditions of each device in real time and controlling the flow;
The produced water treatment agent stored in the agent storage tank 2 and the produced water of the oil field which is subjected to preliminary treatment in the produced water buffer tank 3 (the produced water of the oil field which is obtained through preliminary sedimentation and filtration and does not contain solid particles such as sediment) are respectively pumped into the stirring device 4 directly through pipelines to be stirred and mixed to form mixed produced liquid, the mixed produced liquid is filtered by the filtering device 5 to form purified water, the purified water is stored in the purified water storage tank 6, the purified water is pressurized through the purified water booster pump 7 to obtain high-pressure produced water, the high-pressure produced water enters the mixed liquid tank 13 through the pipelines, and finally the purified water is injected into the wellhead of the injection well through the injection pump 15; the injection pump 15 is connected downstream to the wellhead of the injection well.
The polymer stored in the polymer storage tank 8 and the clear water in the clear water tank 9 are respectively pumped into the static mixer 10 through pipelines to be dispersed and dissolved, then enter the mother liquor tank 11 to be cured or stored, the mother liquor is finally pumped into the mixed liquor tank 13 through the mother liquor output pump 12, and finally is injected into the wellhead of the injection well through the injection pump 15;
the quality monitor 14 feeds back the particle size and viscosity change of the mixed liquid in the mixed liquid tank 13 in real time in the injection allocation control panel 1.
As shown in fig. 2, a curing tank 16, a primary sub-tank 17, a secondary sub-tank 18 and a tertiary sub-tank 19 are arranged inside the mother liquor tank 11; whether the curing tank 16 is connected into the whole polymer injection system or not is selected by adjusting an electric control valve at the upstream of the curing tank 16, namely whether curing operation is carried out on the current polymer mother liquor or not; judging according to the type of polymer stored in the polymer storage tank 8, and connecting the curing tank 16 with each stage of sub-tank in series if connected; the primary sub-tank 17, the secondary sub-tank 18 and the tertiary sub-tank 19 are connected in parallel and are used for storing polymer mother liquor with different particle sizes.
Taking the injection allocation of polymer capsules as an example, the polymer capsules are polymer solutions, and the configured polymer mother liquor needs to be cured, so that the electric control valves on the upstream and downstream of the curing tank 16 should be kept in an open state, the electric control valves in the parallel branches of the curing tank 16 are always in a closed state, and the curing tank 16 is connected into a polymer injection allocation pipeline. By similar operations, the primary sub-tank 17, the secondary sub-tank 18 and the tertiary sub-tank 19 can be temporarily stored with polymer mother liquor of at most three particle sizes, and will not be described here. If the mixing of the polymer capsule mother solutions with different particle sizes is needed, taking the mixing of the polymer capsule mother solutions with three particle sizes as an example, the electric control valves on the upper and lower sides of the primary sub-tank 17, the secondary sub-tank 18 and the tertiary sub-tank 19 should be kept in an open state, and meanwhile, the opening of the electric control valves on the upper and lower sides of the primary sub-tank 17, the secondary sub-tank 18 and the tertiary sub-tank 19 is adjusted according to the set injection ratio among the mother solutions, so that the flow is controlled, and the mixing of the polymer mother solutions is realized.
The injection allocation control panel 1 is directly connected with the electric control valve through a circuit, and can integrate and monitor the pressure and flow conditions of all devices in real time and control the flow.
The integrated control sled 101, the polymer storage sled 106, the polymer dispersion sled 107 and the mother liquor sled 108 are all movably arranged. And the device can be disassembled, and if a certain device is damaged, the device can be directly replaced, so that the normal operation of a polymer injection allocation program is not influenced.
The polymer injection allocation skid-mounted integrated device is provided with a plurality of electric control valves; the specific setting positions comprise: the produced water buffer tank 3 downstream, the medicament storage tank 2 downstream, the stirring device 4 downstream, the filtering device 5 downstream, the water purification storage tank 6 downstream, the water purification booster pump 7 downstream, the polymer storage tank 8 downstream, the clear water tank 9 downstream, the static mixer 10 downstream, in the parallel branch of the curing tank 16, the curing tank 16 upstream, the curing tank 16 downstream, the primary sub-tank 17 upstream, the primary sub-tank 17 downstream, the secondary sub-tank 18 upstream, the secondary sub-tank 18 downstream, the tertiary sub-tank 19 upstream, the tertiary sub-tank 19 downstream, the mother liquor external transmission pump 12 downstream, and the injection pump 15 upstream.
Example 3
A polymer injection dispensing skid-mounted integrated method, as shown in fig. 3, comprising:
(1) Determining injection polymer type
Determining the type of the polymer required by injection allocation according to the requirement of polymer flooding, judging whether curing operation is to be performed on the polymer mother solution, if so, switching the curing tank 16 into a polymer injection allocation system by opening an electric control valve at the upstream of the curing tank 16, otherwise, opening the electric control valve is not required; for example, for a polymer dry powder that is desired to be cooked, the curing tank 16 may be connected to the polymer dosing system by opening an electronically controlled valve upstream of the curing tank 16, and for a polymer solution that is not desired to be cooked, the electronically controlled valve upstream of the curing tank 16 may not be opened.
(2) Setting polymer injection scheme
Setting a polymer injection allocation scheme by an injection allocation control panel 1, wherein the polymer injection allocation scheme comprises injection allocation time, total injection allocation amount, an inter-mother liquor injection allocation ratio, a mother liquor-purified water injection allocation ratio, injection allocation safety pressure, injection allocation safety flow, an injection polymerization particle size range and a shearing measurement range;
(3) Beginning polymer dosing
Mixing the produced water treatment agent with oilfield produced water in a stirring device 4, and mixing the polymer with clear water in a static mixer 10; the produced water treatment agent and the oilfield produced water are mixed and filtered by a filtering device 5 to form purified water which has qualified water quality and does not contain oil drops, floccules and suspended matters, and the purified water is stored in a purified water storage tank 6; the polymer and the clear water are mixed to form polymer mother liquor, the polymer mother liquor enters a mother liquor tank 11, enters a curing tank 16 for curing if curing is needed, then enters a primary sub-tank 17, a secondary sub-tank 18 and a tertiary sub-tank 19, and directly enters the primary sub-tank 17, the secondary sub-tank 18 and the tertiary sub-tank 19 if curing is not needed; then according to the set mother liquor-purified water injection ratio, the purified water and the polymer mother liquor are pumped into a mixed liquor tank 13 through a purified water booster pump 7 and a mother liquor external delivery pump 12 respectively, and finally injected into the wellhead of the injection well through an injection pump 15;
(4) Automatic regulation and control of injection allocation process
The flow and the pressure of each electric control valve are monitored in real time through the injection allocation control panel 1, and the electric control valve at the abnormal position is automatically adjusted to enable the abnormal position to be in accordance with the current injection allocation scheme when the flow and the pressure are abnormal or do not meet the current injection allocation scheme; for example, if the situation that the injection allocation safety pressure or the injection allocation safety flow is exceeded occurs, the electric control valves of the downstream of the water purification booster pump 7 and the mother liquor external transmission pump 12 automatically reduce the opening degree to ensure that the injection allocation pressure and the injection allocation flow reach the safety range; realizing automation and integration of polymer injection allocation;
The injection allocation control panel 1 also monitors the particle size and viscosity change of the mixed liquid in the mixed liquid tank 13 through the quality monitor 14, is used for evaluating the quality of the mixed liquid, and after a small amount of mixed liquid enters the quality monitor 14, the minimum particle size, the maximum particle size and the average particle size of the mixed liquid are obtained through measurement, and then the change condition of the viscosity along with the shear rate is obtained through measurement under the high-speed shear rate. The injection allocation control panel 1 also monitors the particle size and viscosity change of the mixed liquid in the mixed liquid tank 13 through the quality monitor 14, and is used for evaluating the quality of the mixed liquid, after a small amount of mixed liquid enters the quality monitor, the particle size distribution and average particle size of the mixed liquid are obtained through measurement, then the viscosity measurement is carried out under the condition of different shear rates in the shearing measurement range, and if the average particle size of the mixed liquid is in the injection particle size range and the viscosity change in the shearing measurement range is less than 10%, the current mixed liquid is considered to reach the injection quality requirement.
The type of polymer to be dispensed is a dry polymer powder or a polymer solution.
The injection allocation control panel 1 realizes the mixing of polymer mother liquor with different particle diameters by respectively controlling the electric control valves at the downstream of the primary sub-tank 17, the downstream of the secondary sub-tank 18 and the downstream of the tertiary sub-tank 19; the constant proportion injection of the polymer mother solution and the purified water is realized by respectively controlling the electric control valves at the downstream of the mother solution output pump 12 and the downstream of the purified water booster pump 7.
Claims (5)
1. A polymer dispensing skid-mounted integrated device, comprising: the integrated control sled, the medicine storage device, the produced water buffer device, the produced water treatment device, the purified water output device, the storage gathering sled, the polymer dispersing sled, the mother liquor output device, the injection gathering device and the electric control valve;
The medicine storage device and the produced water buffer device are connected with the produced water treatment device, and the produced water treatment device, the purified water output device and the polymer injection device are sequentially connected; the mother liquor pry, the mother liquor delivery device and the polymer injection device are connected in sequence;
The chemical storage device, the produced water buffer device, the produced water treatment device and the purified water external transmission device are all connected on one branch of the upstream of the injection device through pipelines, the produced water treatment chemical stored in the chemical storage device and the oilfield produced water subjected to preliminary treatment in the produced water buffer device are respectively and directly pumped into the produced water treatment device through the pipelines to be stirred and mixed to form mixed produced liquid, purified water is formed after filtration and is stored in the purified water external transmission device, the purified water is pressurized to obtain high-pressure produced water, and the high-pressure produced water enters the injection device through the pipelines and is injected into the wellhead of the injection well;
The polymer storage pry, the polymer dispersion pry, the mother liquor pry and the mother liquor outward conveying device are all connected to the other branch at the upstream of the injection device through pipelines, and the polymer stored in the polymer storage pry and the clear water stored in the polymer dispersion pry are respectively and directly pumped into the polymer dispersion pry through pipelines to be dispersed and dissolved, then enter the mother liquor pry to be cured or stored, and the mother liquor is finally pumped into the injection device through the mother liquor outward conveying device and injected into the wellhead of the injection well;
The integrated control sled is used for monitoring and controlling the whole polymer injection allocation system; the electric control valve is used for monitoring and controlling the flow of each place;
the pipelines of the medicine storage device, the produced water buffer device, the produced water treatment device and the purified water output device are used for treating and boosting the produced water of the oil field, and the pipelines of the medicine storage pry, the polymer dispersing pry, the mother liquor pry and the mother liquor output device are used for preparing polymer mother liquor;
An injection allocation control panel for controlling the whole polymer injection allocation system is arranged in the integrated control sled; a medicament storage tank for storing the produced water treatment medicament is arranged in the medicament storage device; a produced water buffer tank for temporarily storing produced water is arranged in the produced water buffer device; a stirring device and a filtering device are arranged in the produced water treatment device; a water purification storage tank and a water purification booster pump are arranged in the water purification output device; a polymer storage tank for storing the polymer is arranged in the polymer storage sled; a clean water tank and a static mixer are arranged in the polymer dispersing pry; a mother liquor tank for storing mother liquor is arranged in the mother liquor sled; a mother liquor output pump for outputting mother liquor is arranged in the mother liquor output device; a liquid mixing tank, a quality monitor and an injection pump are arranged in the polymer injection device; an electric control valve is arranged on the pipeline, and a flowmeter and a pressure gauge are arranged in the pipeline; the injection allocation control panel is directly connected with the electric control valve through a circuit, and is used for integrally monitoring the pressure and flow conditions of each device in real time and controlling the flow;
The produced water treatment agent stored in the agent storage tank and the oilfield produced water subjected to preliminary treatment in the produced water buffer tank are respectively and directly pumped into the stirring device through pipelines to be stirred and mixed to form mixed produced liquid, the mixed produced liquid is filtered by the filtering device to form purified water, the purified water is stored in the purified water storage tank, the purified water is pressurized by the purified water booster pump to obtain high-pressure produced water, the high-pressure produced water enters the mixed liquid tank through the pipelines, and finally the high-pressure produced water is injected into the wellhead of the injection well through the injection pump;
The polymer stored in the polymer storage tank and clear water in the clear water tank are respectively pumped into the static mixer through pipelines to be dispersed and dissolved, then enter the mother liquor tank to be cured or stored, the mother liquor is finally pumped into the mixed liquor tank through the mother liquor output pump, and finally injected into the wellhead of the injection well through the injection pump;
the quality monitor feeds back the particle size and viscosity change of the mixed liquid in the mixed liquid tank in real time in the injection allocation control panel;
a curing tank, a primary sub-tank, a secondary sub-tank and a tertiary sub-tank are arranged in the mother liquor tank;
Whether the curing tank is connected into the whole polymer injection allocation system or not is selected by adjusting an electric control valve at the upstream of the curing tank, namely whether curing operation is carried out on the current polymer mother liquor or not; the first-stage sub-tank, the second-stage sub-tank and the third-stage sub-tank are connected in parallel and are used for storing polymer mother liquor with different particle diameters;
The polymer injection allocation skid-mounted integrated device is provided with a plurality of electric control valves; the specific setting positions comprise: the method comprises the steps of producing water, buffering a tank downstream, a medicament storage tank downstream, a stirring device downstream, a filtering device downstream, a water purification storage tank downstream, a water purification booster pump downstream, a polymer storage tank downstream, a clear water tank downstream, a static mixer downstream, a curing tank parallel branch, a curing tank upstream, a curing tank downstream, a primary sub-tank upstream, a primary sub-tank downstream, a secondary sub-tank upstream, a secondary sub-tank downstream, a tertiary sub-tank upstream, a tertiary sub-tank downstream, a mother liquor external transmission pump downstream and a filling pump upstream.
2. The polymer injection allocation skid-mounted integrated device according to claim 1, wherein the integrated control skid, the polymer accumulation skid, the polymer dispersion skid and the mother liquor skid are all movably arranged.
3. A polymer injection molding skid-mounted integrated method, implemented by the polymer injection molding skid-mounted integrated device of claim 1 or 2, comprising:
(1) Determining injection polymer type
Determining the type of a polymer required by injection allocation according to the requirement of polymer flooding, judging whether curing operation is to be performed on the polymer mother solution, if so, switching the curing tank into a polymer injection allocation system by opening an electric control valve at the upstream of the curing tank, otherwise, opening the electric control valve;
(2) Setting polymer injection scheme
Setting a polymer injection allocation scheme by an injection allocation control panel, wherein the polymer injection allocation scheme comprises injection allocation time, total injection allocation amount, an inter-mother liquor injection allocation ratio, a mother liquor-purified water injection allocation ratio, injection allocation safety pressure, injection allocation safety flow, an injection polymerization particle size range and a shearing measurement range;
(3) Beginning polymer dosing
Mixing produced water treatment agent and oilfield produced water in a stirring device, and mixing polymer and clear water in a static mixer; the produced water treatment agent and the oilfield produced water are mixed and filtered by a filtering device to form purified water which has qualified water quality and does not contain oil drops, floccules and suspended matters, and the purified water is stored in a purified water storage tank; the polymer and the clear water are mixed to form polymer mother liquor, the polymer mother liquor enters a mother liquor tank, if the polymer mother liquor needs to be cured, the polymer mother liquor enters a curing tank for curing, and then enters a primary sub-tank, a secondary sub-tank and a tertiary sub-tank, and if the polymer mother liquor does not need to be cured, the polymer mother liquor directly enters the primary sub-tank, the secondary sub-tank and the tertiary sub-tank; then according to the set mother liquor-purified water injection proportion, the purified water and the polymer mother liquor are pumped into a mixed liquor tank through a purified water booster pump and a mother liquor external pump respectively, and finally injected into the wellhead of the injection well through an injection pump;
(4) Automatic regulation and control of injection allocation process
The flow and the pressure of each electric control valve are monitored in real time through the injection allocation control panel, and the electric control valve at the abnormal position is automatically adjusted to enable the abnormal position to be in accordance with the current injection allocation scheme when the flow and the pressure are abnormal or do not meet the current injection allocation scheme;
The injection allocation control panel is also used for monitoring the particle size and viscosity change of the mixed liquid in the liquid mixing tank through the quality monitor and evaluating the quality of the mixed liquid, after a small amount of mixed liquid enters the quality monitor, the minimum particle size, the maximum particle size and the average particle size of the mixed liquid are obtained through measurement, and then the change condition of the viscosity along with the shear rate is obtained through measurement under the high-speed shear rate.
4. A polymer injection dispensing skid-mounted integrated process as claimed in claim 3, wherein the injection dispensing polymer type is a polymer dry powder or a polymer solution.
5. The polymer injection allocation skid-mounted integrated method according to claim 3, wherein the injection allocation control panel realizes the mixing of polymer mother solutions with different particle diameters by respectively controlling electric control valves at the downstream of the primary sub-tank, the downstream of the secondary sub-tank and the downstream of the tertiary sub-tank; the constant proportion injection of the polymer mother solution and the purified water is realized by respectively controlling the electric control valves at the downstream of the mother solution output pump and the downstream of the purified water booster pump.
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| CN203043981U (en) * | 2013-02-26 | 2013-07-10 | 大庆汇达兴业机械制造有限公司 | Ganged experimental device for polymer preparation |
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| CN216429579U (en) * | 2021-11-03 | 2022-05-03 | 潍坊胜利石化机械有限公司 | Polymer injection system for oil field |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090242201A1 (en) * | 2007-06-25 | 2009-10-01 | Jorgen Van Beurden | System and method for polymer distribution to well sites |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203043981U (en) * | 2013-02-26 | 2013-07-10 | 大庆汇达兴业机械制造有限公司 | Ganged experimental device for polymer preparation |
| CN205135586U (en) * | 2015-11-23 | 2016-04-06 | 新疆石油工程设计有限公司 | A polymer injection allocation device for strong heterogeneous body oil reservoir |
| CN111140212A (en) * | 2020-01-17 | 2020-05-12 | 大庆市海油庆石油科技有限公司 | Skid-mounted polymer flooding injection allocation device |
| CN216429579U (en) * | 2021-11-03 | 2022-05-03 | 潍坊胜利石化机械有限公司 | Polymer injection system for oil field |
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