CN102384970B - Light crude-oil circular gas-injection low-temperature oxidization experimental method and device - Google Patents
Light crude-oil circular gas-injection low-temperature oxidization experimental method and device Download PDFInfo
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- CN102384970B CN102384970B CN201110240565.3A CN201110240565A CN102384970B CN 102384970 B CN102384970 B CN 102384970B CN 201110240565 A CN201110240565 A CN 201110240565A CN 102384970 B CN102384970 B CN 102384970B
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Abstract
The invention discloses a light crude-oil circular gas-injection low-temperature oxidization experimental method and device. The experimental device comprises a modeling system, a circulating system, an analysis system and a personal computer (PC) monitoring system; the model system is used for simulating the oil reservoir pressure and for simulating an oil reservoir temperature, and the produced gas is sent into the analysis system through the circulating system; the analysis system is used for analyzing the composition of the produced gas and for sending the produced gas after being analyzed into the circulating system; the circulating system is used for returning the produced gas to the modeling system to realize the circular monitoring; and the PC monitoring system is used for monitoring the simulated oil reservoir pressure and the simulated oil reservoir temperature of the modeling system and for recording the gas composition which is circularly monitored by the analysis system. The method and the device adopts a circular gas injection way, so the problem that the experimental balance is broken because of the gas sampling analysis in the reaction system during the experimental process can be avoided.
Description
Technical field
The present invention relates to oil development field, relate in particular to a kind of light crude-oil circular gas-injection low-temperature oxidization experimental method and device, be a kind of at the dynamic displacement process of light crude air injection oil recovery crude oil concretely, thereby realize cyclic gas injection to avoid getting the analysis of gas sample in experimentation and break experimental technique and the device of experiment equilibrium problem.
Background technology
Since the sixties in 20th century, many countries all carried out the research of lightweight oil reservoir injection air oil recovery technique in the world, and many deep layer light oil reservoirs have been carried out air injection field test, have all obtained success technical and economically; It is to utilize gas input well air Injection oil reservoir that described air injection recovers the oil, to supplement and to keep sand pressure, and a kind of measure that utilizes oxidation product flue gas flooding effect, oxidative heat generation effect to recover the oil.Described low-temperature oxidation refers in reservoir condition sub-surface crude oil and the oxidation reaction of injecting airborne oxygen generation.
Although the exploitation of light oil reservoirs air-injected low-temperature oxidation is started late in China, but because air source is wide, with low cost, be subject in recent years extensive concern, small-scale air foam flooding shaft (transfer drive) site test has also been carried out in several oil fields, and obtained good effect, but the inadequate system of air-injected low-temperature oxidation Study on Correlative Mechanisms and perfect on the whole.
The shortcoming of light oil reservoirs air injection exploitation is to have unsafe factor, and when injecting airborne oxygen and crude oil and low-temperature oxidation does not occur completely reacting, in output gas, hydrocarbon gas and oxygen mix are easily blasted; Low-permeability oil deposit air injection another one feature be exactly after low-temperature oxidation oil property can change, such as viscosity variation, change of component etc., the variation of these oil properties likely damages the pore texture of low-permeability oil deposit, this is just strict with the Related Experimental Study of carrying out low-temperature oxidation early stage, and reasonably optimizing note is adopted parameter on this basis.
At present, although carrying out a large amount of work aspect the research of light oil reservoirs air injection exploitation low-temperature oxidation experimental simulation method and apparatus both at home and abroad, but, for carrying out, crude oil low-temperature oxidation is studied existing experimental technique and device still has the following disadvantages: 1) do not consider the poor gravitational differentiation causing of hydrocarbon density, crude oil generation low-temperature oxidation remains at oil gas interface and is dissolved in the oxygen participation reaction in crude oil, and reliable experiment result degree is poor; 2) dynamically displacement process device is inconsiderate easily causes gas channelling, causes the reaction of sample low-temperature oxidation uneven, and reliable experiment result degree is poor; 3) do not possess pressure, temperature and volume data multichannel collecting system; 4) experiment flow automaticity is not high; 5) do not possess output gas on-line real time monitoring function; 6) data acquisition mostly is artificial reading, and this can cause a lot of personal errors.
In view of this, the inventor relies on relevant design and manufacturing experience for many years, proposes a kind of light crude-oil circular gas-injection low-temperature oxidization experimental method and device, to overcome the defect of prior art.
Summary of the invention
The embodiment of the present invention provides a kind of experimental apparatus for cyclic gas-injection low-temperature oxidation of light crude oil and method, for making up above-mentioned defect of the prior art.
The embodiment of the present invention provides a kind of experimental apparatus for cyclic gas-injection low-temperature oxidation of light crude oil, comprises model system, the circulation system, analytic system and PC supervisory system; Wherein, described model system is connected with the described circulation system, and described analytic system is connected with the described circulation system, and described PC supervisory system is connected with described analytic system with described model system respectively; Described model system is used for simulating oil deposit pressure and simulating oil deposit temperature, and output gas is sent into described analytic system by the described circulation system; Described analytic system is used for analyzing the gas composition of described output gas, and the output pneumatic transmission is by analysis entered to the described circulation system; The described circulation system is for being back to described model system by described output pneumatic transmission, to realize circulatory monitoring; Described PC supervisory system is used for monitoring simulating oil deposit pressure and the simulating oil deposit temperature of described model system, and records the gas composition of described analytic system circulatory monitoring.
Preferably, the model system of the embodiment of the present invention comprises reaction vessel, heating watt, double-layer vacuum heat insulated device, baking oven and reactor outlet valve; Described heating watt is positioned at described reaction vessel outside, described double-layer vacuum heat insulated device is configured in described heating watt and described reaction vessel outside, described reactor outlet valve is positioned at described double-layer vacuum heat insulated bottom of device, and described reaction vessel, heating watt, double-layer vacuum heat insulated device and reactor outlet valve are positioned at described baking oven; External vacuum pump is that described model system vacuumizes by described reactor outlet valve, and is warmed up to predetermined simulating oil deposit temperature by described heating watt with described baking oven; Described reactor outlet valve also for saturated a certain amount of crude oil and air to described reaction vessel, boost to the simulating oil deposit pressure of reservation, generate described output gas.
Preferably, the circulation system of the embodiment of the present invention comprises the first ball-and-seat, the second ball-and-seat, the 3rd ball-and-seat, the 4th ball-and-seat, the 5th ball-and-seat, the 6th ball-and-seat, the 7th ball-and-seat, first piston formula intermediate receptacle, the second piston type intermediate receptacle, the 3rd piston type intermediate receptacle, the first twin-tub ISCO volume pump, the second twin-tub ISCO volume pump, the 3rd twin-tub ISCO volume pump, air intermediate receptacle and coil pipe; Described air intermediate receptacle is connected with described model system by described the first ball-and-seat; Described air intermediate receptacle is connected with described the 3rd piston type intermediate receptacle by described the second ball-and-seat; Described first piston formula intermediate receptacle is connected with described analytic system with described the 4th ball-and-seat by described the 3rd ball-and-seat respectively with described the second piston type intermediate receptacle; Described first piston formula intermediate receptacle is connected with described the 3rd piston type intermediate receptacle with described the 6th ball-and-seat by described the 5th ball-and-seat respectively with described the second piston type intermediate receptacle; Described the first twin-tub ISCO volume pump, the second twin-tub ISCO volume pump, the 3rd twin-tub ISCO volume pump are connected with described first piston formula intermediate receptacle, the second piston type intermediate receptacle, the 3rd piston type intermediate receptacle respectively; Described the 3rd piston type intermediate receptacle is connected in described model system by described the 7th ball-and-seat and described coil pipe; Described the first ball-and-seat is used for controlling described output gas and backflows and enter described air intermediate receptacle; Described the second ball-and-seat is sent to described the 3rd piston type intermediate receptacle for controlling by the generator of described air intermediate receptacle; The output gas of described analytic system is sent to described first piston formula intermediate receptacle and described the second piston type intermediate receptacle by described the 3rd ball-and-seat and described the 4th ball-and-seat control; Described the 5th ball-and-seat and described the 6th ball-and-seat control are sent to the output gas in described first piston formula intermediate receptacle and described the second piston type intermediate receptacle in described the 3rd piston type intermediate receptacle; Described the first twin-tub ISCO volume pump, the second twin-tub ISCO volume pump, the 3rd twin-tub ISCO volume pump are for promoting the piston movement of described first piston formula intermediate receptacle, the second piston type intermediate receptacle, the 3rd piston type intermediate receptacle; Described the 7th ball-and-seat returns to described model system by the output gas of described the 3rd piston type intermediate receptacle by described coil pipe for controlling.
Preferably, the analytic system of the embodiment of the present invention comprises reduction valve and gas composition on-line monitoring instrument, and described reduction valve is connected in described gas composition on-line monitoring instrument, for laggard promoting the circulation of qi body component analysis that the output gas of described model system generation is reduced pressure.
Preferably, the PC monitoring system of the embodiment of the present invention comprises temperature sensor, model temperature sensor, model pressure transducer and gas composition on-line monitoring instrument sensor in PC, model; In described model, temperature sensor, model temperature sensor, model pressure transducer are connected with described PC by cable with gas composition on-line monitoring instrument sensor; In described model, temperature sensor, model temperature sensor, model pressure transducer are arranged in described model system; Described gas composition on-line monitoring instrument sensor is arranged in described analytic system.
The embodiment of the present invention also provides a kind of light crude-oil circular gas-injection low-temperature oxidization experimental method, comprise: by model system simulating oil deposit pressure and simulating oil deposit temperature, and output gas is sent into analytic system by the circulation system and analyze the gas composition of described output gas, and the output pneumatic transmission is by analysis entered to the described circulation system; Described output pneumatic transmission is back to described model system by the described circulation system, to realize circulatory monitoring; Simulating oil deposit pressure and the simulating oil deposit temperature of PC supervisory system monitoring model system, and record the gas composition of described analytic system circulatory monitoring.
The light crude-oil circular gas-injection low-temperature oxidization experimental method of the embodiment of the present invention and the beneficial effect of device are: adopt cyclic gas injection mode, avoided in reactive system, getting the analysis of gas sample in experimentation and break experiment balance problem, and all response analysises complete in a closed system, and experimental result is more true and reliable; Because cyclic gas injection is intermittent gas injection, be not easy to cause gas channelling, cause sample low-temperature oxidation reaction inequality, the poor problem of reliable experiment result degree; Use double-layer vacuum heat insulated device, and whole system is placed in baking oven, ensured reaction vessels and extraneous less temperature difference, ensured that low-temperature oxidation heat production can accumulate and monitor out; Temperature and pressure monitoring system based on PC, improves experimental study robotization and reliability standard; Possess output system sample on-line monitoring function, improved real time implementation, automaticity.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those skilled in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of a kind of experimental apparatus for cyclic gas-injection low-temperature oxidation of light crude oil of the embodiment of the present invention;
Fig. 2 is the detailed structure schematic diagram of a kind of experimental apparatus for cyclic gas-injection low-temperature oxidation of light crude oil of the embodiment of the present invention.
Drawing reference numeral: 1, reaction vessel 2, heating watts 3, double-layer vacuum heat insulated device 4, model temperature sensor 5, temperature sensor 6 in model, the first ball-and-seat 7, air intermediate receptacle 8, the 3rd ball-and-seat 9, the 4th ball-and-seat 10, the 5th ball-and-seat 11, the 6th ball-and-seat 12, the second ball-and-seat 13, the 7th ball-and-seat 14, coil pipe 15, gas composition on-line monitoring instrument 16, reduction valve 17, first piston formula intermediate receptacle 18, the second piston type intermediate receptacle 19, the 3rd piston type intermediate receptacle 20, first piston formula intermediate receptacle piston 21, the second piston type intermediate receptacle piston 22, the 3rd piston type intermediate receptacle piston 23, the first twin-tub ISCO volume pump 24, the second twin-tub ISCO volume pump 25, the 3rd twin-tub ISCO volume pump 26, reactor outlet valve 27, PC 28, baking oven 29, model pressure transducer
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 1, the structural representation of a kind of experimental apparatus for cyclic gas-injection low-temperature oxidation of light crude oil providing for the embodiment of the present invention, this experimental apparatus for cyclic gas-injection low-temperature oxidation of light crude oil can comprise: model system 110, the circulation system 120, analytic system 130 and PC supervisory system 140; Wherein, described model system 110 is connected with the described circulation system 120, and described analytic system 130 is connected with the described circulation system 120, and described PC supervisory system 140 is connected with described analytic system 130 with described model system 110 respectively.
Described model system 110 is for simulating oil deposit pressure and simulating oil deposit temperature, and output gas is sent into described analytic system 130 by the described circulation system 120; Described analytic system 130 is for analyzing the gas composition of described output gas, and the output pneumatic transmission is by analysis entered to the described circulation system 120; The described circulation system 120 is for described output pneumatic transmission is back to described model system 110, to realize circulatory monitoring; Described PC supervisory system 140 is for monitoring simulating oil deposit pressure and the simulating oil deposit temperature of described model system 110, and records the gas composition of described analytic system 130 circulatory monitorings.
Because the experimental provision of the embodiment of the present invention has been tried out cyclic gas injection, avoided in reactive system, getting the analysis of gas sample in experimentation and break experiment balance problem.And cyclic gas injection is intermittent gas injection, be not easy to cause gas channelling, thereby cause, the reaction of sample low-temperature oxidation is uneven, the poor problem of reliable experiment result degree.
Below above-mentioned experimental apparatus for cyclic gas-injection low-temperature oxidation of light crude oil is conducted further description:
Be illustrated in figure 2 the detailed structure schematic diagram of a kind of experimental apparatus for cyclic gas-injection low-temperature oxidation of light crude oil that the embodiment of the present invention provides.
In the present embodiment, described model system 110 comprises reaction vessel 1, heating watts 2, double-layer vacuum heat insulated device 3, baking oven 28 and reactor outlet valve 26.
Described heating watts 2 is positioned at reaction vessel 1 outside, double-layer vacuum heat insulated device 3 is configured in described heating watts 2 and described reaction vessel 1 outside, described reactor outlet valve 26 is positioned at described double-layer vacuum heat insulated device 3 bottoms, and described reaction vessel 1, heating watts 2, double-layer vacuum heat insulated device 3 and reactor outlet valve 26 are positioned at described baking oven 28.
In the time implementing experimental apparatus for cyclic gas-injection low-temperature oxidation of light crude oil of the present invention, in model system reaction vessel 1, fill a certain amount of reservoir sand, vacuumize for whole model system by described reactor outlet valve 26 by external vacuum pump, and be warmed up to predetermined simulating oil deposit temperature by described heating watts 2 and described baking oven 28; Described reactor outlet valve 26 also for saturated a certain amount of crude oil and air to described reaction vessel 1, boost to the simulating oil deposit pressure of reservation, generate described output gas.In the present embodiment, the highest simulating oil deposit pressure that described model system generates is 50MPa, and the highest reservoir temperature is 200 DEG C.
In the present embodiment, the circulation system comprises seven ball-and-seats, three piston type intermediate receptacles, three twin-tub ISCO volume pumps, an air intermediate receptacle and a coil pipe.On air intermediate receptacle, by ball-and-seat, outlet is connected end entrance with model system, the outlet of air intermediate receptacle lower end is connected with one of them piston type intermediate receptacle by ball-and-seat, two other piston type intermediate receptacle entrance is connected with air intermediate receptacle with after analytic system series connection by ball-and-seat respectively, and the outlet of these two piston type intermediate receptacles is connected with the entrance of another one piston type intermediate receptacle by ball-and-seat respectively; The other end of three piston type intermediate receptacle pistons is connected with respectively a twin-tub ISCO volume pump, and another outlet of the piston type intermediate receptacle being connected with air intermediate receptacle is passed through to be connected with model system entrance after ball-and-seat, coil pipe.
As shown in Figure 2, the circulation system 120 comprises the first ball-and-seat 6, the second ball-and-seat 12, the 3rd ball-and-seat 8, the 4th ball-and-seat 9, the 5th ball-and-seat 10, the 6th ball-and-seat 11, the 7th ball-and-seat 13, first piston formula intermediate receptacle 17, the second piston type intermediate receptacle 18, the 3rd piston type intermediate receptacle 19, the first twin-tub ISCO volume pump 23, the second twin-tub ISCO volume pump 24, the 3rd twin-tub ISCO volume pump 25, air intermediate receptacle 7 and coil pipe 14.Wherein, first piston formula intermediate receptacle 17, the second piston type intermediate receptacle 18, the 3rd piston type intermediate receptacle 19 are interior has respectively piston 20, piston 21 and a piston 22.
Air intermediate receptacle 7 upper ends are connected with described model system 110 outlets by described the first ball-and-seat 6; The 7 lower end outlet connections of air intermediate receptacle are arranged in parallel two paths, one of them piston type intermediate receptacle 19 is connected with air intermediate receptacle 7 by the second ball-and-seat 12, two other piston type intermediate receptacle 17,18 entrances are respectively by being connected with air intermediate receptacle 7 after the 3rd ball-and-seat 8, the 4th ball-and-seat 9 and analytic system 130 series connection, and the outlet of these two piston type intermediate receptacles 17,18 is connected with the entrance of another one piston type intermediate receptacle 19 by ball-and-seat 10,11 respectively; Described air intermediate receptacle 7 is connected with described the 3rd piston type intermediate receptacle 19 by described the second ball-and-seat 12; Described first piston formula intermediate receptacle 17 is connected with described the 3rd piston type intermediate receptacle 19 with described the 6th ball-and-seat 11 by described the 5th ball-and-seat 10 respectively with described the second piston type intermediate receptacle 18; Described the first twin-tub ISCO volume pump 23, the second twin-tub ISCO volume pump 24, the 3rd twin-tub ISCO volume pump 25 are connected with described first piston formula intermediate receptacle 17, the second piston type intermediate receptacle 18, the 3rd piston type intermediate receptacle 19 respectively; Described the 3rd piston type intermediate receptacle 19 is connected in described model system 110 by described the 7th ball-and-seat 13 and described coil pipe 14.
The first ball-and-seat 6 is controlled described output gas and is backflowed and enter described air intermediate receptacle 7; Described the second ball-and-seat 12 is controlled the output gas of described air intermediate receptacle 7 is sent in the 3rd piston type intermediate receptacle 19; Described the 3rd ball-and-seat 8 and described the 4th ball-and-seat 9 are controlled the output gas of described analytic system are sent to described first piston formula intermediate receptacle 17 and described the second piston type intermediate receptacle 18; Described the 5th ball-and-seat 10 and described the 6th ball-and-seat 11 are controlled 18 output gas in described first piston formula intermediate receptacle 17 and described the second piston type intermediate receptacle are sent in described the 3rd piston type intermediate receptacle 19; Described the first twin-tub ISCO volume pump 23, the second twin-tub ISCO volume pump 24, the 3rd twin-tub ISCO volume pump 25 are for promoting piston 20,21,22 motions of described first piston formula intermediate receptacle 17, the second piston type intermediate receptacle 18, the 3rd piston type intermediate receptacle 19; Described the 7th ball-and-seat 13 returns to described model system 110 by the output gas of described the 3rd piston type intermediate receptacle 19 by described coil pipe 14 for controlling.
In the present embodiment, analytic system 130 comprises reduction valve 16 and gas composition on-line monitoring instrument 15, described reduction valve 16 is connected in described gas composition on-line monitoring instrument 15, for the output gas that described model system 110 the is generated laggard promoting the circulation of qi body component analysis of reducing pressure.
In the present embodiment, PC monitoring system 140 comprises temperature sensor 5, model temperature sensor 4, model pressure transducer 29 and gas composition on-line monitoring instrument sensor (not shown) in PC 27, model.
In model, temperature sensor 5, model temperature sensor 4, model pressure transducer 29 are connected with described PC 27 by cable with gas composition on-line monitoring instrument sensor; In model, temperature sensor 5, model temperature sensor 4, model pressure transducer 29 are arranged in described model system 110; Described gas composition on-line monitoring instrument sensor is arranged in described analytic system 130.
Based on experimental apparatus for cyclic gas-injection low-temperature oxidation of light crude oil corresponding to above-mentioned Fig. 2, the workflow of embodiment of the present invention experimental provision is introduced as follows below:
In the reaction vessel 1 of model system 110, fill a certain amount of reservoir sand 300ml compacting, by reactor outlet valve 26, whole system is vacuumized with vacuum pump, by the saturated a certain amount of crude oil 90ml of reactor outlet valve 26 in reaction vessel 1, a certain amount of space is stopped on reaction vessel 1 top, prevent from entering the first ball-and-seat 6 because displacement effect causes liquid in the time that inlet injects air, then inject 90ml air to predetermined pressure 12MPa by reactor outlet valve 26, open that PC control system 140 is controlled heating watts 2 and baking oven 28 is warmed up to predetermined pressure 12MPa simultaneously, when after whole system balance, be stabilized in 70 DEG C of reservoir pressure 12MPa and reservoir temperatures.Off-response device outlet valve 26 and model system 110 Nei Jiarewa 2, set reduction valve 16 pressure, open three twin-tub ISCO volume pumps 23, 24, 25 and gas composition on-line monitoring instrument 15, by three twin-tub ISCO volume pumps 23, 24, 25 promote the piston 20 in three piston type intermediate receptacles, 21, 22 to-and-fro movements, interior reaction vessel 1 output part through after component monitoring, all in the reaction vessel 1 of output air in piston type intermediate receptacle 19 injection model systems 110, wherein by twin-tub ISCO volume pump 23, two piston type intermediate receptacles 17 that 24 guarantees and analytic system 130 are connected, piston movement in 18 is contrary, mainly to ensure that the low-pressure air after out enters the intermediate receptacle that one of them pressure is lower (for example piston type intermediate receptacle 17) through gas composition on-line monitoring instrument 15, in the time entering this piston type intermediate receptacle that pressure is lower 17, another one piston type intermediate receptacle 18 just in time piston reverse motions boosts, the object of boosting is to ensure that the reaction output gas in this piston type intermediate receptacle 18 is expressed in piston type intermediate receptacle 19, piston type intermediate receptacle 19 is also under the effect of ball-and-seat, to be expressed in reaction vessel 1 by the to-and-fro movement of piston, ensure the whole process of cyclic gas injection.
The effect of coil pipe 14 is to ensure that air in piston type intermediate receptacle 19 enters reaction vessel 1 when interior, there is time enough in baking oven 28 the inside heating, substantially similar with the temperature in reaction vessel 1, because measure the variation of reaction vessel temperature, the heat that the heat that therefore the output band of gas is walked and injecting gas are brought into is wanted balance.Be exactly in addition, because three piston type intermediate receptacles, not in baking oven 28, are cold airs for what prevent from entering, so utilize coil pipe to allow gas heat fully.
In the present embodiment, by online gas composition monitor 15 analytical gas components, pass through the automatic record of gas composition on-line monitoring instrument sensor by PC 27, until experiment finishes, experiment finishes to get fluid sample from the reactor outlet valve 26 of model system and carries out analyzing and testing and obtain oil component result so repeatedly.
The light crude-oil circular gas-injection low-temperature oxidization experimental method of the embodiment of the present invention and device are compared with prior art, have the following advantages: adopt cyclic gas injection mode, avoided in reactive system, getting the analysis of gas sample in experimentation and break experiment balance problem, and all response analysises complete in a closed system, and experimental result is more true and reliable; Because cyclic gas injection is intermittent gas injection, be not easy to cause gas channelling, cause sample low-temperature oxidation reaction inequality, the poor problem of reliable experiment result degree; Use double-layer vacuum heat insulated device, and whole system is placed in baking oven, ensured reaction vessels and extraneous less temperature difference, ensured that low-temperature oxidation heat production can accumulate and monitor out; Temperature and pressure monitoring system based on PC, improves experimental study robotization and reliability standard; Possess output system sample on-line monitoring function, improved real time implementation, automaticity.
Above-described specific embodiment; object of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the foregoing is only specific embodiments of the invention; the protection domain being not intended to limit the present invention; within the spirit and principles in the present invention all, any amendment of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (7)
1. an experimental apparatus for cyclic gas-injection low-temperature oxidation of light crude oil, is characterized in that, described experimental apparatus for cyclic gas-injection low-temperature oxidation of light crude oil comprises model system, the circulation system, analytic system and PC supervisory system;
Wherein, described model system is connected with the described circulation system, and described analytic system is connected with the described circulation system, and described PC supervisory system is connected with described analytic system with described model system respectively;
Described model system is used for simulating oil deposit pressure and simulating oil deposit temperature, and output gas is sent into described analytic system by the described circulation system; Described analytic system is used for analyzing the gas composition of described output gas, and the output pneumatic transmission is by analysis entered to the described circulation system; The described circulation system is for being back to described model system by described output pneumatic transmission, to realize circulatory monitoring; Described PC supervisory system is used for monitoring simulating oil deposit pressure and the simulating oil deposit temperature of described model system, and records the gas composition of described analytic system circulatory monitoring;
Described model system comprises reaction vessel, heating watt, double-layer vacuum heat insulated device, baking oven and reactor outlet valve;
Described heating watt is positioned at described reaction vessel outside, described double-layer vacuum heat insulated device is configured in described heating watt and described reaction vessel outside, described reactor outlet valve is positioned at described double-layer vacuum heat insulated bottom of device, and described reaction vessel, heating watt, double-layer vacuum heat insulated device and reactor outlet valve are positioned at described baking oven;
External vacuum pump is that described model system vacuumizes by described reactor outlet valve, and is warmed up to predetermined simulating oil deposit temperature by described heating watt with described baking oven; Described reactor outlet valve also for saturated a certain amount of crude oil and air to described reaction vessel, boost to the simulating oil deposit pressure of reservation, generate described output gas.
2. experimental apparatus for cyclic gas-injection low-temperature oxidation of light crude oil as claimed in claim 1, it is characterized in that, the described circulation system comprises the first ball-and-seat, the second ball-and-seat, the 3rd ball-and-seat, the 4th ball-and-seat, the 5th ball-and-seat, the 6th ball-and-seat, the 7th ball-and-seat, first piston formula intermediate receptacle, the second piston type intermediate receptacle, the 3rd piston type intermediate receptacle, the first twin-tub ISCO volume pump, the second twin-tub ISCO volume pump, the 3rd twin-tub ISCO volume pump, air intermediate receptacle and coil pipe;
Described air intermediate receptacle is connected with described model system by described the first ball-and-seat; Described air intermediate receptacle is connected with described the 3rd piston type intermediate receptacle by described the second ball-and-seat; Described first piston formula intermediate receptacle is connected with described analytic system with described the 4th ball-and-seat by described the 3rd ball-and-seat respectively with described the second piston type intermediate receptacle; Described first piston formula intermediate receptacle is connected with described the 3rd piston type intermediate receptacle with described the 6th ball-and-seat by described the 5th ball-and-seat respectively with described the second piston type intermediate receptacle; Described the first twin-tub ISCO volume pump, the second twin-tub ISCO volume pump, the 3rd twin-tub ISCO volume pump are connected with described first piston formula intermediate receptacle, the second piston type intermediate receptacle, the 3rd piston type intermediate receptacle respectively; Described the 3rd piston type intermediate receptacle is connected in described model system by described the 7th ball-and-seat and described coil pipe;
Described the first ball-and-seat is used for controlling described output gas and backflows and enter described air intermediate receptacle; Described the second ball-and-seat is sent to described the 3rd piston type intermediate receptacle for controlling by the generator of described air intermediate receptacle; The output gas of described analytic system is sent to described first piston formula intermediate receptacle and described the second piston type intermediate receptacle by described the 3rd ball-and-seat and described the 4th ball-and-seat control; Described the 5th ball-and-seat and described the 6th ball-and-seat control are sent to the output gas in described first piston formula intermediate receptacle and described the second piston type intermediate receptacle in described the 3rd piston type intermediate receptacle; Described the first twin-tub ISCO volume pump, the second twin-tub ISCO volume pump, the 3rd twin-tub ISCO volume pump are for promoting the piston movement of described first piston formula intermediate receptacle, the second piston type intermediate receptacle, the 3rd piston type intermediate receptacle; Described the 7th ball-and-seat returns to described model system by the output gas of described the 3rd piston type intermediate receptacle by described coil pipe for controlling.
3. experimental apparatus for cyclic gas-injection low-temperature oxidation of light crude oil as claimed in claim 1, it is characterized in that, described analytic system comprises reduction valve and gas composition on-line monitoring instrument, described reduction valve is connected in described gas composition on-line monitoring instrument, for laggard promoting the circulation of qi body component analysis that the output gas of described model system generation is reduced pressure.
4. experimental apparatus for cyclic gas-injection low-temperature oxidation of light crude oil as claimed in claim 1, it is characterized in that, described PC monitoring system comprises temperature sensor, model temperature sensor, model pressure transducer and gas composition on-line monitoring instrument sensor in PC, model;
In described model, temperature sensor, model temperature sensor, model pressure transducer are connected with described PC by cable with gas composition on-line monitoring instrument sensor; In described model, temperature sensor, model temperature sensor, model pressure transducer are arranged in described model system; Described gas composition on-line monitoring instrument sensor is arranged in described analytic system.
5. experimental apparatus for cyclic gas-injection low-temperature oxidation of light crude oil as claimed in claim 1, is characterized in that, the highest simulating oil deposit pressure that described model system generates is 50MPa, and the highest reservoir temperature is 200 DEG C.
6. a light crude-oil circular gas-injection low-temperature oxidization experimental method, is characterized in that, described light crude-oil circular gas-injection low-temperature oxidization experimental method comprises:
By model system simulating oil deposit pressure and simulating oil deposit temperature, and output gas is sent into analytic system by the circulation system and analyze the gas composition of described output gas, and the output pneumatic transmission is by analysis entered to the described circulation system; Described output pneumatic transmission is back to described model system by the described circulation system, to realize circulatory monitoring; Simulating oil deposit pressure and the simulating oil deposit temperature of PC supervisory system monitoring model system, and record the gas composition of described analytic system circulatory monitoring.
7. light crude-oil circular gas-injection low-temperature oxidization experimental method as claimed in claim 6, is characterized in that, the highest simulating oil deposit pressure that described model system generates is 50MPa, and the highest reservoir temperature is 200 DEG C.
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| CN105019889B (en) * | 2014-04-28 | 2017-10-24 | 中国石油化工股份有限公司 | A kind of light oil reservoirs crude oil low-temperature oxidation rate prediction and safe precaution method |
| CN104373115A (en) * | 2014-10-31 | 2015-02-25 | 中国石油化工股份有限公司 | Air simulating and sampling device for air displacement oil output and simulating and sampling method |
| CN105467102B (en) * | 2016-01-07 | 2017-05-10 | 西南石油大学 | Experimental device and method of ultra-thick crude oil oxygenated fuel deposition |
| CN110898791A (en) * | 2018-09-18 | 2020-03-24 | 北京嘉德宜邦石油科技开发有限公司 | Crude oil low-temperature oxidation reaction device |
| CN109799312B (en) * | 2018-12-11 | 2021-10-22 | 中国矿业大学 | Simulation device and method for low-temperature oxidation of coal |
| CN113358685A (en) * | 2020-08-24 | 2021-09-07 | 中海油能源发展股份有限公司 | Temperature compensation system for low-temperature oxidation intelligent detection |
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