CN209838385U - Oil field steady voltage water injection system - Google Patents
Oil field steady voltage water injection system Download PDFInfo
- Publication number
- CN209838385U CN209838385U CN201920287128.9U CN201920287128U CN209838385U CN 209838385 U CN209838385 U CN 209838385U CN 201920287128 U CN201920287128 U CN 201920287128U CN 209838385 U CN209838385 U CN 209838385U
- Authority
- CN
- China
- Prior art keywords
- water
- water injection
- pressure sensor
- pressure
- stabilizing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Earth Drilling (AREA)
Abstract
The utility model relates to an oil field steady voltage water injection system is particularly useful for the limited water injection region of offshore oil field and ground area and uses. The system comprises a pressure stabilizing tank, wherein the pressure stabilizing tank is provided with a tank body and a water bag, an air source is connected with an air supply pipe of the pressure stabilizing tank through an air supply pipe, the pressure stabilizing tank is connected in a pipe between a reinjection water source and a water injection pump through a three-way pipe, and a water outlet of the water injection pump is connected with a water injection well head through a pipe; the water suction port and the water outlet of the water injection pump are respectively provided with a water suction port pressure sensor and a water outlet pressure sensor, power lines of the water suction port pressure sensor and the water outlet pressure sensor are connected with a power supply controller of the water injection pump, and the water suction port pressure sensor and the water outlet pressure sensor are connected with the programmable logic controller through signal cables. The system is of a fully-closed structure, no dissolved oxygen enters the reinjection water, the corrosivity of the reinjection water cannot be increased, and the phenomenon that the dissolved oxygen is increased before and after the reinjection water is avoided.
Description
Technical Field
The utility model belongs to the injection facility of oil field water injection development, especially an oil field steady voltage water injection system are particularly useful for the regional use of offshore oil field and the limited water injection of ground area.
Background
Water injection is a development technology for improving the recovery ratio commonly adopted by various oil fields at home and abroad at present, and the purpose of water injection is to keep the formation pressure of an oil reservoir by injecting water while oil recovery is carried out, realize injection-recovery balance and finally improve the recovery ratio of the oil reservoir.
At present conventional water injection system mainly comprises water injection buffer tank, water injection pump and control system, and in order to guarantee the steady operation of water injection pump, the buffering adjust time of water injection buffer tank generally is 4 ~ 6h, and the jar is bulky, and area is big, to the limited special condition of field area such as offshore oil field under, just must increase platform area by a wide margin if use conventional water injection buffer tank, causes the big increase of engineering investment.
In addition, the conventional water injection buffer tank is an open tank, and the fluctuation of the liquid level in the tank easily causes air to enter the tank body, so that dissolved oxygen is increased, a series of problems such as standard exceeding caused by corrosion and the like are caused, and adverse effects are caused on a water injection system. The industrial standard of water injection quality of clastic rock oil reservoirs 'recommended index and analysis method for clastic rock oil reservoir water injection quality' SY/T5329-2012 has definite index limits on dissolved oxygen, corrosion rate and the like in injected water, and the water injection engineering of an oil field must control the dissolved oxygen and the caused corrosion.
Disclosure of Invention
The utility model aims at providing an oil field steady voltage water injection system makes this system totally airtight and atmosphere isolated, guarantees the pressure stability of water injection pump water sucking mouth, avoids the water injection pump frequently to open because of the pressure fluctuation and stops, ensures water injection system's operating stability. The occupied area of a water injection system is reduced, the water injection benefits of offshore oil fields and use areas with limited ground areas are improved, and the production cost is reduced.
The technical scheme of the utility model realize through following mode: a pressure-stabilizing water injection system for an oil field comprises a pressure-stabilizing tank, wherein the pressure-stabilizing tank is provided with a tank body and a water bag, the tank body is provided with an exhaust pipe, an exhaust valve, an air supplementing pipe and an air supplementing valve, and the exhaust pipe and the air supplementing pipe are communicated with an air storage cavity; the gas source is connected with a gas supply pipe of the pressure stabilizing tank through a gas supply pipe, the pressure stabilizing tank is connected in a pipeline between a reinjection water source and the water injection pump through a three-way pipe, and a water outlet of the water injection pump is connected with a water injection well head through a pipeline; the water suction port and the water outlet of the water injection pump are respectively provided with a water suction port pressure sensor and a water outlet pressure sensor, power lines of the water suction port pressure sensor and the water outlet pressure sensor are connected with a power supply controller of the water injection pump, and the water suction port pressure sensor and the water outlet pressure sensor are connected with the programmable logic controller through signal cables.
Compared with the prior art, the utility model discloses a show the effect and lie in: the surge tank in the system can realize the buffer adjustment of water injection flow and pressure according to water stored in the water bag, thereby greatly reducing the volume of the tank body. The water storage cavity is arranged in the water bag, the gas storage cavity is arranged between the water bag and the tank body, the gas source can adopt air or inert gas, and the water bag can be expanded or contracted according to the internal and external pressure difference, so that the water injection pump is stable in operation, the frequent start and stop of the water injection pump due to pressure fluctuation are avoided, and the operation stability of a water injection system is ensured; compared with the conventional water injection buffer tank, the system has greatly reduced volume and is suitable for offshore oil fields and use areas with limited ground area.
The utility model provides a programmable logic controller, PLC promptly can be according to the opening instruction of the pressure setting solenoid valve of gas storage chamber in the surge tank, for gas storage chamber make-up gas. And meanwhile, the water suction port sensor and the water outlet sensor which are arranged at the water suction port and the water outlet of the water injection pump are also connected with the programmable logic controller through signal cables, so that the sensors can automatically stop the water injection pump according to pressure instructions. When the pressure of the water suction port of the water injection pump is lower than a set value, the pump is automatically stopped, and an alarm is given when the pressure is higher than the set value; when the pressure of the water outlet of the water injection pump is higher than a set value, the pump is automatically stopped, and the automatic air supply of the surge tank, the pump stopping of the water injection pump and the alarming function are realized.
The system is of a fully-closed structure, reinjection water in the water bag in the pressure stabilizing tank and reinjection water in the pipeline are completely isolated from air, no dissolved oxygen enters the reinjection water, the corrosivity of the reinjection water cannot be increased, and no dissolved oxygen is increased before and after water injection. The system is controlled by the PLC, unattended operation and automatic operation are achieved, labor intensity of workers is reduced, stable operation of a water injection system is improved, and the problem that the service life is influenced due to frequent starting and stopping of a water injection pump is avoided. Has obvious use effect and can produce obvious economic benefit.
Drawings
Fig. 1 is a schematic view of the working process of the present invention.
Fig. 2 is a schematic structural view of the surge tank.
Detailed Description
The following detailed description of the present invention, taken in conjunction with the accompanying drawings, is not intended to limit the scope of the invention. It is only following do the preferred embodiment of the utility model, other applications the utility model discloses an equivalent change all should belong to the utility model discloses a protection scope.
Referring to fig. 1 and 2, the oilfield pressure-stabilizing water injection system comprises a pressure-stabilizing tank 3, wherein the pressure-stabilizing tank 3 is provided with a tank body 32 and a water bag 31, the tank body 32 is provided with an exhaust pipe 34, an exhaust valve 35, an air supplementing pipe 39 and an air supplementing valve 38, and the exhaust pipe 34 and the air supplementing pipe 39 are communicated with an air storage cavity 33; the air source 1 is connected with an air supply pipe 39 of the pressure stabilizing tank 3 through an air supply pipe, the pressure stabilizing tank 3 is connected in a pipeline between a reinjection water source and the water injection pump 6 through a three-way pipe, and a water outlet of the water injection pump 6 is connected with a water injection well head through a pipeline; the water suction port and the water outlet of the water injection pump 6 are respectively provided with a water suction port pressure sensor 4 and a water outlet pressure sensor 5, power lines of the water suction port pressure sensor 4 and the water outlet pressure sensor 5 are connected with a power supply controller of the water injection pump 6, and the water suction port pressure sensor 4 and the water outlet pressure sensor 5 are connected with a programmable logic controller 7 through a signal cable 2. The programmable logic controller 7 can be customized to the manufacturer according to specific needs.
And the power controllers of the programmable logic controller 7 and the water injection pump 6 are connected with a ground electrical control cabinet through cables.
The lower end bag opening of the water bag 31 of the pressure stabilizing tank 3 is connected with the right-angle pipe opening of the three-way pipe, and two horizontal pipe openings of the three-way pipe are connected in a pipeline between the reinjection water source and the water injection pump 6.
An air supply pipe 39 between the air supply valve 38 of the pressure stabilizing tank 3 and the tank body 32 is also provided with an electromagnetic valve 37 and an air storage pressure sensor 36.
The gas storage pressure sensor 36 is arranged in a gas supplementing pipe 39 below the electromagnetic valve 37, the electromagnetic valve 37 and the gas storage pressure sensor 36 are also connected with the programmable logic controller 7 through the signal cable 2, and a power line of the electromagnetic valve 37 and a power line of the gas storage pressure sensor 36 are connected with the ground electric control cabinet.
The electromagnetic valve 37 is a one-way valve, so that the gas from the gas supplementing pipe 39 can only enter the gas storage cavity 33 and can not return from the gas storage cavity 33.
The embodiments described above are merely exemplary embodiments, but the present invention is not limited to these embodiments, and those skilled in the art can make modifications without departing from the spirit and teaching of the present invention. Many variations, combinations, and modifications of the aspects disclosed herein are possible and are within the scope of the invention, which is, therefore, not to be limited by the above description.
Claims (6)
1. A pressure-stabilizing water injection system for an oil field comprises a pressure-stabilizing tank, wherein the pressure-stabilizing tank is provided with a tank body and a water bag, the tank body is provided with an exhaust pipe, an exhaust valve, an air supply pipe and an air supply valve, and the exhaust pipe and the air supply pipe are communicated with a gas storage cavity; the water suction port and the water outlet of the water injection pump are respectively provided with a water suction port pressure sensor and a water outlet pressure sensor, power lines of the water suction port pressure sensor and the water outlet pressure sensor are connected with a power supply controller of the water injection pump, and the water suction port pressure sensor and the water outlet pressure sensor are connected with the programmable logic controller through signal cables.
2. The oilfield pressure-stabilizing water injection system as claimed in claim 1, wherein the programmable logic controller and the power controller of the water injection pump are connected with the ground electrical control cabinet through cables.
3. The oilfield pressure-stabilizing water injection system as defined in claim 1, wherein the bladder port at the lower end of the water bladder of the pressure-stabilizing tank is connected with a right-angle nozzle of a three-way pipe, and two horizontal nozzles of the three-way pipe are connected in a pipeline between a reinjection water source and the water injection pump.
4. The oilfield pressure-stabilizing water injection system as claimed in claim 1 or 3, wherein the air supply pipe between the air supply valve and the tank body of the pressure-stabilizing tank is further provided with an electromagnetic valve and an air storage pressure sensor.
5. The oilfield pressure-stabilizing water injection system according to claim 4, wherein the gas storage pressure sensor is installed in the gas supply pipe below the solenoid valve, the solenoid valve and the gas storage pressure sensor are also connected with the programmable logic controller through signal cables, and a power cord of the solenoid valve and a power cord of the gas storage pressure sensor are connected with the ground electrical control cabinet.
6. The oilfield pressure-stabilizing water injection system as defined in claim 5, wherein the solenoid valve is a one-way valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920287128.9U CN209838385U (en) | 2019-03-07 | 2019-03-07 | Oil field steady voltage water injection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920287128.9U CN209838385U (en) | 2019-03-07 | 2019-03-07 | Oil field steady voltage water injection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209838385U true CN209838385U (en) | 2019-12-24 |
Family
ID=68905449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920287128.9U Expired - Fee Related CN209838385U (en) | 2019-03-07 | 2019-03-07 | Oil field steady voltage water injection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209838385U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114412538A (en) * | 2021-12-24 | 2022-04-29 | 淮北矿业股份有限公司芦岭煤矿 | Coal seam steady voltage water injection system |
| CN114458278A (en) * | 2022-01-19 | 2022-05-10 | 淮北矿业股份有限公司 | Coal seam water injection pressure stabilizing device and using method |
-
2019
- 2019-03-07 CN CN201920287128.9U patent/CN209838385U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114412538A (en) * | 2021-12-24 | 2022-04-29 | 淮北矿业股份有限公司芦岭煤矿 | Coal seam steady voltage water injection system |
| CN114458278A (en) * | 2022-01-19 | 2022-05-10 | 淮北矿业股份有限公司 | Coal seam water injection pressure stabilizing device and using method |
| CN114458278B (en) * | 2022-01-19 | 2023-10-27 | 淮北矿业股份有限公司 | Coal seam water injection pressure stabilizing device and use method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209838385U (en) | Oil field steady voltage water injection system | |
| CN201513146U (en) | Solar-powered integrated remote measuring and monitoring system | |
| CN205639727U (en) | Automatic air supplement unit | |
| CN203616658U (en) | Closed-loop flow numerical control system based on waterproof test | |
| CN203927018U (en) | A kind of electric remote control float valve | |
| CN203755383U (en) | Pressure-stable water supply device for crystallizer of continuous casting machine | |
| CN203770764U (en) | Carbon dioxide pressure reducing valve | |
| CN205101198U (en) | Water route device is used to resin production medium vacuum pump | |
| CN103470847B (en) | Siphon air inlet/outlet valve | |
| CN203049695U (en) | Energy-saving high-rise water supply system for secondary pressurization | |
| CN205298775U (en) | Ware is opened and close to valve | |
| CN204664513U (en) | Multi-purpose type gas control one-way valve | |
| CN203502841U (en) | Ball float valve liquid level control system | |
| CN207441847U (en) | Accumulator acid adding machine negative pressure voltage stabilizing alarm system | |
| CN206034560U (en) | Modular top atmospheric pressure jar floats | |
| CN209861870U (en) | Automatic water-saving control system for drip irrigation water supply in cotton field | |
| CN202381396U (en) | Deflation type adjustable nozzle for electrical submersible pump | |
| CN111677485A (en) | Oil well back pressure automatic control device | |
| CN203176471U (en) | Water supply control device capable of controlling water inflow pressure | |
| CN204901010U (en) | Pneumatic solenoid valves | |
| CN203611068U (en) | Cooling device for machine tool | |
| CN204371222U (en) | A kind of Intelligent constant flow water injection well | |
| CN204532589U (en) | Based on the reduction valve of liquefied petroleum gas (LPG) and natural gas double fuel engine | |
| CN208996133U (en) | A kind of energy consumption monitoring management platform | |
| CN207701791U (en) | Big flow plunger type normal valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191224 Termination date: 20210307 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |