CN103899284A - Movable liquid CO2 injection skid-mounted device - Google Patents
Movable liquid CO2 injection skid-mounted device Download PDFInfo
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- CN103899284A CN103899284A CN201410078070.9A CN201410078070A CN103899284A CN 103899284 A CN103899284 A CN 103899284A CN 201410078070 A CN201410078070 A CN 201410078070A CN 103899284 A CN103899284 A CN 103899284A
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- liquid
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/70—Combining sequestration of CO2 and exploitation of hydrocarbons by injecting CO2 or carbonated water in oil wells
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Abstract
The invention belongs to the field of oil exploitation, and particularly relates to a movable liquid CO2 injection skid-mounted device. The movable liquid CO2 injection skid-mounted device comprises a liquid CO2 storage tank, a carrying system, a pumping system and a heating system, the carrying system comprises a tank car and a carrying platform, the liquid CO2 storage tank is fixed to the tank car, the pumping system and the heating system are fixed to the carrying platform, the carrying platform is provided with an injection pipeline and a return pipeline, and the pumping system and the heating system are connected to the injection pipeline in sequence. The inlet end of the injection pipeline and the outlet end of the return pipeline are connected with a liquid outlet and a liquid inlet of the liquid CO2 storage tank respectively through an injection pressure hose and a return pressure hose, and the liquid outlet and the liquid inlet of the liquid CO2 storage tank are provided with a liquid outlet valve and a return valve respectively, and the outlet end of the injection pipeline is connected with a well mouth. The movable liquid CO2 injection skid-mounted device can achieve liquid CO2 injection and improve exploitation efficiency, can achieve CO2 geological storage, and can carry out carrying and adjustment fast according to the position of a CO2 huff and puff well.
Description
Technical field
The invention belongs to oil exploration equipment field, particularly a kind of portable liquid CO
2injection device, especially relates to the liquid CO of movable type of low permeability oil field
2inject skid-mounted device.
Background technology
North Shaanxi drought is short of rain and uneven, water resources shortage, and in waterflooding extraction process, usually have the problems such as insufficient water sources, note do not enter, and gas injection development low permeability oil field technology is ripe, can effectively supplement stratum energy.
Compared with water filling, note CO
2effective exploitation that not only can Oil Fields in North Shaanxi hyposmosis reserves improves the problem of recovery percent of reserves and recovery ratio, but also can realize CO
2geological storage, response country calls and solves greenhouse gases (CO
2) effectively bury and recycling.
The construction of Northern Shaanxi Energy chemical base is rapid, CO
2source of the gas is abundant, for large area is carried out liquid CO
2the displacement of reservoir oil provides source of the gas guarantee.
But because Oil Fields in North Shaanxi not only belongs to low permeability oil field, and strata pressure is low, note CO
2improve recovery ratio and can not reach miscible pressure, need realize CO
2throughput operation, injects a certain amount of liquid CO
2rear immersion a period of time, then open flow, exploitation, and circulation according to this.
At present for down-hole filling liquid CO
2device mostly be fixed or semi-fixed type, need lifting, can not effective integration, more can not be according to note CO
2the in time fast adjustment of well and block of handling up.
Summary of the invention
For overcoming the defect of prior art, the invention provides a kind of portable liquid CO
2inject skid-mounted device, not only can real liquid CO
2inject and improve recovery ratio, and can also realize CO
2geological storage, more can be according to CO
2handle up well fast position the adjustment of migrating.
For achieving the above object, the present invention adopts following proposal:
A kind of portable liquid CO
2inject skid-mounted device, comprise liquid CO
2storage tank, delivery system, pumping system and heating system, wherein, delivery system comprises tank car and carrying platform, liquid CO
2storage tank is fixed on tank car, and pumping system and heating system are fixed on carrying platform, and carrying platform is provided with and injects pipeline and reflux pipeline, and pumping system and heating system are connected in successively to be injected on pipeline; Inject the entrance point of pipeline and the port of export of reflux pipeline respectively by injecting pressure hose and backflow pressure hose and liquid CO
2the liquid outlet of storage tank is connected with inlet, liquid CO
2the liquid outlet of storage tank and inlet are equipped with respectively liquid valve and return valve, and the port of export that injects pipeline is connected with well head.
Further, heating system is heating cabinet, and pumping system comprises connected successively canned motor pump and injection pump, and low temperature bypass valve is housed between the port of export of injection pump and reflux pipeline, and between the arrival end of heating cabinet, control and regulation valve is housed.
Further, injection pump adopts low temperature resistant conveying liquid body plunger displacement pump, and maximum output pressure is 45MPa; The pipeline material of injecting pipeline and reflux pipeline is 16Mn tubing, and bore is
inch.
Further, between reflux pipeline and the port of export of injection pipeline, high temperature by-pass valve is housed.
Further, between high temperature by-pass valve and return valve, be provided with emptying end, and atmospheric valve is housed.
Further, on the pipeline sidewall between heating cabinet and the port of export of injection pipeline, by bypass, safety valve is installed.
Further, between control and regulation valve and heating cabinet, one way valve is also housed.
Further, between control and regulation valve and heating cabinet, adiabatic flange is also housed.
Further, the present invention also comprises control system, described control system is fixed on carrying platform, comprise switchbox and variable frequency control case, outside incoming call is connected with variable frequency control case by switchbox, the live wire that variable frequency control case is drawn is connected with canned motor pump, injection pump and heating cabinet respectively, and the shared ground wire of canned motor pump, injection pump and heating cabinet is connected with switchbox or variable frequency control case simultaneously, forms loop; The arrival end of described injection pump and the port of export of heating cabinet are all equipped with pressure-detecting device and temperature-detecting device, and are connected with variable frequency control case by data line.
Liquid CO in above-mentioned arbitrary technical scheme
2inject skid-mounted device, its carrying platform has telescoping shoring column, and this telescoping shoring column is at least symmetricly set on cornerwise two ends of carrying platform.
With respect to prior art, technique effect of the present invention is:
1, injection device height of the present invention is integrated, and technological process is succinct, easy to operate, and the pump group in pumping system also can extend to 2-3, realizes 1-3 mouth well is injected simultaneously, saves engineering investment cost.
2, the present invention is injecting liquid CO
2when improving recovery ratio, also can realize CO
2geological storage, can effectively reduce pollution, protection of the environment.
3, the present invention is because adopting frequency conversion control technique, and gas injection pump can fixed-voltage altering-current amount be worked, and meets different injection allocation amount demands; And heating system can constant temperature work, ensure that stratum is because variations in temperature is by cold liquid CO
2frostbite is frozen block even.
4, equipment of the present invention is all fixed on movably sled and above, bottom movably prizing, telescoping shoring column is housed simultaneously, ensures to bet in time, migrates fast, is convenient to especially low permeability oil field CO
2handle up and improve recovery ratio use.
Brief description of the drawings
Fig. 1 is schematic diagram of the present invention.
In figure, 1, tank car; 2, carrying platform; 3, telescoping shoring column; 4, switchbox; 5, variable frequency control case; 6, canned motor pump; 7, injection pump; 8, low temperature bypass valve; 9, high temperature bypass valve; 10, one way valve; 11, heating cabinet; 12, control and regulation valve; 13, safety valve; 14, atmospheric valve; 15, return valve; 16, outlet valve; 17, inject pressure hose; 18, backflow pressure hose; 19, adiabatic flange; 20, liquid CO
2storage tank; 21, inject pipeline; 22, reflux pipeline.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail.
The invention provides a kind of portable liquid CO
2inject skid-mounted device, comprise liquid CO
2storage tank 20, delivery system, pumping system and heating system, wherein, delivery system comprises tank car 1 and carrying platform 2, ensures that the present invention can be according to CO
2handle up well fast position the adjustment of migrating.Liquid CO
2storage tank 20 is fixed on tank car 1, is convenient to transhipment and changes liquid CO
2storage tank 20, liquid CO
2the preferred capacity of storage tank 20 is 15T or 25T.Pumping system and heating system are fixed on carrying platform 2, and carrying platform 2 is provided with and injects pipeline 21 and reflux pipeline 22, and pumping system and heating system are connected in successively to be injected on pipeline 21.Pumping system is for injecting the entrance point of pipeline 21 and the port of export of reflux pipeline 22 respectively by injecting pressure hose 17 and backflow pressure hose 18 and liquid CO
2the liquid outlet of storage tank 20 is connected with inlet, liquid CO
2the liquid outlet of storage tank 20 and inlet are equipped with respectively outlet valve 16 and return valve 15, and the port of export that injects pipeline 21 is connected with well head.Inject pipeline 21 and be communicated with liquid CO
2the liquid outlet of storage tank 20 and well head, reflux pipeline 22 is communicated with liquid CO
2the inlet of storage tank 20 and well head, realize CO
2handle up.
Preferably, said heating system is heating cabinet 11, using water as heat medium, to injecting the CO in pipeline 21
2carry out heating water bath.The preferable volume of heating cabinet 11 is 2 sides, and the line temperature after heating cabinet 11 heating should be greater than 10 DEG C, but minimum must not be lower than 8 DEG C.Because the CO2 of heat can lower the temperature with the metal such as well head and oil pipe generation exchange heat in injection process, because heating cabinet 11 can not ensure pipeline constant temperature, so common mode of heating is batch (-type) heating, heat the temperature rise that a period of time makes heating cabinet 11 interior media and stop heating after certain value, wait pipeline inner fluid (CO
2) temperature restart heating cabinet 11 during lower than 10 DEG C.Pipeline inner fluid (CO
2) temperature preferably 10-15 DEG C of scope, although too high temperature is to CO
2injection does not have negative effect, but can increase heating running cost.
Meanwhile, pumping system comprises connected successively canned motor pump 6 and injection pump 7, between the port of export of injection pump 7 and reflux pipeline 22, low temperature bypass valve 8 is housed, and control and regulation valve 12 is housed between the arrival end of heating cabinet 11.Canned motor pump 6 provides pump front inlet hydraulic to injection pump 7, is generally 2MPa left and right.Injection pump 7 is for promoting injection pressure, and available pressure limit is 2-45MPa.Low temperature bypass valve 8 is realized low-temp low-pressure backflow and is controlled, and is mainly used in cooling injection pump 7 and injection pump 7 injection pipeline 21 before, reduces liquid CO
2gasification, the delivery efficiency of raising injection pump 7.
Before injection, open liquid CO
2the liquid outlet of storage tank 20 and inlet, open low temperature bypass valve 8, and closing control control valve 12 simultaneously, forms closed circuit, for the pipeline before cooling injection pump 7 and injection pump 7, to reduce liquid CO
2gasification degree.Because injection pump 7 is liquid pumps, if there is gas, its delivery efficiency significantly reduces, and is even zero.
Above-mentioned injection pump 7 adopts low temperature resistant conveying liquid body plunger displacement pump, and maximum output pressure is 45MPa.Under normal circumstances, the well intake pressure of Injection Well design is lower than 25MPa, and actual well intake pressure is conventionally again lower than design pressure.For preventing the high phenomenon of strata pressure of indivedual wells, therefore select the slightly higher injection pump 7 of output pressure.Too high output pressure does not have too large necessity on the one hand, can increase on the other hand yet and drop into and running cost.In addition, the tube wire of injection pipeline 21 and reflux pipeline 22 is of fine quality elects 16Mn tubing as, because the steel of this material have good lower temperature resistance; The bore of pipeline is preferably
inch, because the diameter of well head and oil pipe normally
inch, selects the pipeline of this size bore be convenient to directly be connected with well head or connect by conventional crossover sub.
Preferably, between reflux pipeline 22 and the port of export of injection pipeline 21, high temperature by-pass valve 9 is housed, between high temperature by-pass valve 9 and return valve 15, is provided with emptying end, and atmospheric valve 14 is housed.Under normal circumstances, high temperature by-pass valve 9 is all the time in closed condition, along with CO
2injection, liquid CO
2pressure in storage tank 20 can reduce gradually, liquid CO
2can gasify gradually because of pressure decreased, so as liquid CO
2when pressure in storage tank 20 is lower, need suitably open high temperature bypass valve 9, promote liquid CO
2pressure in storage tank 20.After needs are safeguarded or are changed control and regulation valve 12 during to the pipeline between well head or other equipment, by the suitable unlatching high temperature bypass valve 9 emptying pressure in airtight pipeline around here.Meanwhile, atmospheric valve 14 is generally in closed condition, only stops in injection work, opens when pipeline is carried out to emptying.
Preferably, on the pipeline sidewall between heating cabinet 11 and the port of export of injection pipeline 21, by bypass, safety valve 13 is installed.By open an aperture on pipeline sidewall, at one section of tubule of aperture place welding, safety valve 13 is arranged on to the end of tubule by screw thread.Under normal circumstances, safety valve 13, conventionally in closed condition, does not affect the normal conveying of injecting pipeline 21.In the time that the pressure of injection pipeline 21 exceedes the set pressure tolerance band of safety valve 13 for some reason, safety valve 13 can be opened automatically, discharge line pressure, prevents that pipeline is because of hypertonia explosion, after overpressure is lower than the pressure of setting, can automatically close again.The set pressure of safety valve 13 can be selected as required.
After preventing controlling to adjust valve 12, inject the liquid CO in pipeline 21
2adverse current, is also equipped with one way valve 10 between control and regulation valve 12 and heating cabinet 11.
Meanwhile, between control and regulation valve 12 and heating cabinet 11, adiabatic flange 19 is also housed, can be used for isolating heated injection pipeline 21 heats and be delivered to injection pump 7, and then avoid affecting the delivery efficiency of injection pump 7.
The present invention also comprises control system, this control system is fixed on carrying platform 2, comprise switchbox 4 and variable frequency control case 5, outside incoming call is by being connected with variable frequency control case 5 after switchbox 4 voltage stabilizings, the 380V live wire that variable frequency control case 5 is drawn is connected with canned motor pump 6, injection pump 7 and heating cabinet 11 respectively, canned motor pump 6, injection pump 7 and the shared ground wire of heating cabinet 11 are connected with switchbox 4 or variable frequency control case 5 simultaneously, form loop.The port of export of the arrival end of injection pump 7 and heating cabinet 11 is all equipped with pressure-detecting device and temperature-detecting device, and is connected with variable frequency control case 5 by data line.Described pressure-detecting device and temperature-detecting device are respectively the pressure meter with pressure sensor and the thermometer with temperature pick up.Wherein, manometric measurement range selection 0-45MPa, the measurement range selection-30-40 DEG C of thermometer.Because the temperature of liquid CO 2 is-20 DEG C, thus select the minimum scale of thermometer lower than-20 DEG C, for example, to be-30 DEG C, even more lower than a bit, as-40 DEG C.Because outside in winter, northern Shensi is colder, this range can effectively avoid thermometer to be damaged by frost.And the highest scale that adds hotlist can be selected according to the heating-up temperature of heating cabinet, thus select the maximum range of thermometer slightly higher, as 40 DEG C.
First variable frequency control case receives the temperature and pressure transmitting from temperature and pressure sensor and shows (temperature and pressure that comprises the front temperature and pressure of injection pump, heating cabinet rear line), if the temperature of heating cabinet rear line, lower than the minimum of setting, starts heater automatically, if this temperature, higher than the peak of setting, is carried out power-off to the heating resistor in heating cabinet, its rate of heat addition arranges by frequency conversion and shows on variable frequency control case.
Meanwhile, variable frequency control case 5 also can start and close down operation canned motor pump 6, injection pump 7, and is adjusted the rotating speed of injection pump 7 and then controlled output pressure by frequency conversion, injects flow.
In addition, carrying platform 2 of the present invention also has telescoping shoring column 3, and this telescoping shoring column 3 is at least symmetricly set on 2 one cornerwise two ends of carrying platform, and the steady safety that is conducive to injection process is carried out.
When this skid-mounted device sails to CO to be noted into
2after well or block, first prop Telescopic support 3 and support, fix carrying platform 2.Be connected with inlet with the liquid outlet of liquid CO 2 storage tank 20 by pressure hose 17,18 respectively with reflux pipeline 22 injecting pipeline 21 by screw thread, and outer incoming call is connected with switchbox 4.
Formally carry out liquid CO
2before injection, first closing control control valve 12 and atmospheric valve 14, then open liquid CO
2the outlet valve 16 of storage tank 20 and return valve 15, and low temperature bypass valve 8, and start canned motor pump 6, use liquid CO
2pipeline before circulating cooling injection pump 7 and injection pump 7, to reduce liquid CO
2gasification degree.Open heating cabinet 11 simultaneously, the medium in heating cabinet 11 is carried out to preheating.In the time there is obvious frost phenomenon in injection pump 7, open control and regulation valve 12, close low temperature bypass valve 8, start injection pump 7, regulate the rate of heat addition of heating cabinet 11, make liquid CO 2 be injected into oil reservoir according to predetermined injection pressure by well head, pit shaft.
In injection process, return valve 15 is always in opening, and this is on no impact of injection process, because the low temperature bypass valve 8 on airtight reflux pipeline 22, high temperature bypass valve 9 and atmospheric valve 14 are all in closed condition.In the time that the pressure in liquid CO 2 storage tank 20 is lower, only need the suitable pressure supercharging that high temperature bypass valve 9 gets final product in liquid towards CO2 storage tank 20 of opening.High temperature bypass valve 9 is controlled for realizing HTHP backflow, generally in closed condition, only improve liquid CO 2 storage tank 20 internal pressures at needs, and safeguard or change when being positioned at one way valve 10 to the injection pipeline 21 between well head or adiabatic flange 19 and needing emptying and just suitably open.
In the time that injection work stops, close outlet valve 16 and return valve 15, the outer incoming call of powered-down disconnection is connected with switchbox 4, close the valve on well head, open low temperature bypass valve 8, high temperature bypass valve 9 and atmospheric valve 14, after exhausting pipeline, by the joint that pressure hose 17,18 disassembles and disconnection is connected with well head being connected with return valve 15 with outlet valve 16 simultaneously, regain telescoping shoring column 3, Injection Well or block that adjustment that like this can be motor-driven at any time need to move to.
The parts that the present embodiment does not describe in detail and structure belong to well-known components and common structure or the conventional means of the industry, here not narration one by one.
Claims (10)
1. portable liquid CO
2inject skid-mounted device, it is characterized in that, comprise liquid CO
2storage tank, delivery system, pumping system and heating system, described delivery system comprises tank car and carrying platform, described liquid CO
2storage tank is fixed on tank car, and described pumping system and heating system are fixed on carrying platform, and described carrying platform is provided with and injects pipeline and reflux pipeline, and pumping system and heating system are connected in successively to be injected on pipeline; The entrance point of described injection pipeline and the port of export of reflux pipeline are respectively by injecting pressure hose and backflow pressure hose and liquid CO
2the liquid outlet of storage tank is connected with inlet, described liquid CO
2the liquid outlet of storage tank and inlet are equipped with respectively liquid valve and return valve, and the port of export of described injection pipeline is connected with well head.
2. the liquid CO of movable type according to claim 1
2inject skid-mounted device, it is characterized in that, described heating system is heating cabinet, and described pumping system comprises connected successively canned motor pump and injection pump, low temperature bypass valve is housed between the port of export of described injection pump and reflux pipeline, and between the arrival end of heating cabinet, control and regulation valve is housed.
3. the liquid CO of movable type according to claim 2
2inject skid-mounted device, it is characterized in that, described injection pump adopts low temperature resistant conveying liquid body plunger displacement pump, and maximum output pressure is 45MPa; The pipeline material of injecting pipeline and reflux pipeline is 16Mn tubing, and bore is
inch.
4. the liquid CO of movable type according to claim 3
2inject skid-mounted device, it is characterized in that, between described reflux pipeline and the port of export of injection pipeline, high temperature by-pass valve is housed.
5. the liquid CO of movable type according to claim 4
2inject skid-mounted device, it is characterized in that, between described high temperature by-pass valve and return valve, be provided with emptying end, and atmospheric valve is housed.
6. the liquid CO of movable type according to claim 5
2inject skid-mounted device, it is characterized in that, on the pipeline sidewall between described heating cabinet and the port of export of injection pipeline, by bypass, safety valve is installed.
7. the liquid CO of movable type according to claim 6
2inject skid-mounted device, it is characterized in that, between described control and regulation valve and heating cabinet, one way valve is also housed.
8. the liquid CO of movable type according to claim 7
2inject skid-mounted device, it is characterized in that, between described control and regulation valve and heating cabinet, adiabatic flange is also housed.
9. the liquid CO of movable type according to claim 8
2inject skid-mounted device, it is characterized in that, also comprise control system, described control system is fixed on carrying platform, comprise switchbox and variable frequency control case, outside incoming call is connected with variable frequency control case by switchbox, and the live wire that variable frequency control case is drawn is connected with canned motor pump, injection pump and heating cabinet respectively, the shared ground wire of canned motor pump, injection pump and heating cabinet is connected with switchbox or variable frequency control case simultaneously, forms loop; The arrival end of described injection pump and the port of export of heating cabinet are all equipped with pressure-detecting device and temperature-detecting device, and are connected with variable frequency control case by data line.
10. according to the liquid CO of the arbitrary described movable type of claim 1-9
2inject skid-mounted device, it is characterized in that, described carrying platform has telescoping shoring column, and described telescoping shoring column is at least symmetricly set on cornerwise two ends of carrying platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410078070.9A CN103899284A (en) | 2014-03-05 | 2014-03-05 | Movable liquid CO2 injection skid-mounted device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410078070.9A CN103899284A (en) | 2014-03-05 | 2014-03-05 | Movable liquid CO2 injection skid-mounted device |
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| CN103899284A true CN103899284A (en) | 2014-07-02 |
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ID=50990830
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| CN201410078070.9A Pending CN103899284A (en) | 2014-03-05 | 2014-03-05 | Movable liquid CO2 injection skid-mounted device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104818969A (en) * | 2015-03-11 | 2015-08-05 | 中国石油天然气股份有限公司 | Liquid cross-linking agent injection device |
| CN106917613A (en) * | 2017-04-24 | 2017-07-04 | 新疆敦华石油技术股份有限公司 | Oilfield liquids carbon dioxide injection device and method for implanting |
| CN110220118A (en) * | 2019-05-22 | 2019-09-10 | 安瑞科(廊坊)能源装备集成有限公司 | Liquefy compressed natural gas high-pressure plunger pump pipeline system |
| CN115722360A (en) * | 2022-11-21 | 2023-03-03 | 中国海洋大学 | Hard seabed erosion system and method combining carbon dioxide and abrasive cavitation jet |
| CN116498278A (en) * | 2023-06-27 | 2023-07-28 | 大庆信辰油田技术服务有限公司 | Carbon dioxide huff and puff injection pump sled |
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| CN104818969A (en) * | 2015-03-11 | 2015-08-05 | 中国石油天然气股份有限公司 | Liquid cross-linking agent injection device |
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| CN110220118A (en) * | 2019-05-22 | 2019-09-10 | 安瑞科(廊坊)能源装备集成有限公司 | Liquefy compressed natural gas high-pressure plunger pump pipeline system |
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| CN116498278A (en) * | 2023-06-27 | 2023-07-28 | 大庆信辰油田技术服务有限公司 | Carbon dioxide huff and puff injection pump sled |
| CN116498278B (en) * | 2023-06-27 | 2023-09-05 | 大庆信辰油田技术服务有限公司 | Carbon dioxide huff and puff injection pump sled |
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Application publication date: 20140702 |