CN108071390A - A kind of complexity heavy crude reservoir oil-soluble foaming agent strengthens mixed gas and handles up experimental provision and its application process - Google Patents
A kind of complexity heavy crude reservoir oil-soluble foaming agent strengthens mixed gas and handles up experimental provision and its application process Download PDFInfo
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- CN108071390A CN108071390A CN201810018800.4A CN201810018800A CN108071390A CN 108071390 A CN108071390 A CN 108071390A CN 201810018800 A CN201810018800 A CN 201810018800A CN 108071390 A CN108071390 A CN 108071390A
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- oil
- pressure
- holding unit
- mixed gas
- foaming agent
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B43/166—Injecting a gaseous medium; Injecting a gaseous medium and a liquid medium
- E21B43/168—Injecting a gaseous medium
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
Abstract
A kind of complexity heavy crude reservoir oil-soluble foaming agent strengthens mixed gas and handles up experimental provision.Mixed gas used is natural gas and propane in the present invention, the two mixing ratio natural gas, CO2Or CH4There is preferably dissolving viscosity reducing effect etc. single light-component gas, and it is possible to prevente effectively from propane gas liquefies, reduce propane gas dosage, reduce the use cost of propane.In addition, the present invention can generate artificial foam oil in the stage of handling up and mixed gas cooperation and lower the gas speed of response, reduce viscosity of thickened oil, so as to solve the problems, such as that existing complicated recovery factor of heavy oil reservoir is not high by oil-soluble foaming agent.
Description
Technical field
Strengthen mixed gas the present invention relates to a kind of complicated heavy crude reservoir oil-soluble foaming agent to handle up experimental provision and its should
With method, belong to exploitation technology of heavy reservoir field.
Background technology
Viscous crude resource very abundant in world wide, accounts for more than 1/3rd of petroleum resources total amount.It verifies and controls in China
1,900,000,000 tons of reserves processed or more, are distributed widely in more than ten of oil field such as the Liaohe River, Xinjiang, triumph.In addition, as China's oil-gas exploration is opened
The internationalization of hair, a large amount of foreign countries' viscous crude resources are urgently developed (Venezuela's Orinoco heavy oil belts etc.).Therefore, in conventional gas and oil
Exploration and development difficulty is increasing, and energy contradiction becomes increasingly conspicuous instantly, greatly develops viscous crude and improves recovery efficiency technique with weight
Want meaning.
Compared with other areas in the world, the complicated heavy crude reservoir large storage capacity such as China sea, thin layer and edge-bottom water.Conventional note
Thermal process measure heat loss is serious, ground installation volume is big, applicability is poor.Huff and puff technology can preferably solve above-mentioned
Problem is widely used to complicated heavy crude reservoir both at home and abroad.But there are still problems with for the technology：1. it handles up the production phase
The quick output of gas is injected, strata pressure is caused to reduce rapidly, viscosity of crude raises again；2. the natural gas used handled up, CO2、CH4
Grade light-component gas are spread in viscous crude, solvability is poor, and the dew points such as ethane, propane are relatively low, easily liquefy and cause to use
Measure excessive, cost is excessively high.Therefore, how delay to handle up the production phase injection gas speed of response, improves pure gas and handles up exploitation
Effect becomes key issue urgently to be resolved hurrily at present.
Cold adopt of the special heavy crude reservoir in part (ground such as Kazakhstan, Canada and Venezuela are spat in Xinjiang) decompression is precipitated in the process
Solution gas but without output quick as the huff and puff production phase, and be dispersed in crude oil and form foam oil.Foam
The presence of oily phenomenon causes aerogenesis speed and viscosity of thickened oil to reduce, volume expansion.Production practices show the special viscous crude oil in the part
It hides more conventional dissolved gas drive reservoir recovery ratio and is higher by 5-25%, rate of oil production is higher by 10-30 times.
It is dissolved gas drive mistake since above-mentioned special heavy crude reservoir decompression development process is similar to huff and puff production process
Journey, if foam can be formed as special heavy crude reservoir is depressured development process during complicated heavy crude reservoir gas injection is handled up
Oil overcomes the huff and puff production phase to inject the quick output of gas, strata pressure is caused to reduce rapidly, viscosity of crude is again raised
Problem, it will substantially improve China's complexity heavy crude reservoir gas injection and handle up development effectiveness, there is larger application prospect and raising to adopt
Yield potentiality.
The content of the invention
For problem of the prior art, the present invention provides a kind of complicated heavy crude reservoir oil-soluble foaming agent and strengthens mixed gas
It handles up experimental provision.
The present invention also provides a kind of application processes of above-mentioned experimental provision.
Mixed gas used is natural gas and propane in the present invention, the two mixing ratio natural gas, CO2Or CH4It is light etc. single
Component gas have preferably dissolving viscosity reducing effect, and it is possible to prevente effectively from propane gas liquefaction, reduces propane gas dosage, drop
The use cost of low propane.In addition, the present invention can be generated by oil-soluble foaming agent in the stage of handling up and mixed gas cooperation
Artificial foam oil lowers the gas speed of response, reduces viscosity of thickened oil, not high so as to solve existing complicated recovery factor of heavy oil reservoir
Problem.
Technical scheme is as follows：
A kind of complexity heavy crude reservoir oil-soluble foaming agent strengthens mixed gas and handles up experimental provision, including：Core holding unit,
Stratum water container, oil vessel living are connected in parallel in the core holding unit entrance, in parallel connect is exported in the core holding unit
It is connected to oil-soluble foaming agent container and mixed gas container；Artificial foam oil is also connected in turn in core holding unit outlet
Generate observation window, back-pressure valve and gas-liquid separation device.
Preferred according to the present invention, the gas-liquid separation device includes：Separator, high Accuracy Electronic Balance, gasmetry
System and vacuum pump.
Preferred according to the present invention, the core holding unit is interior pressure-measuring type core holding unit；Preferably, the rock core folder
The pressure tap of holder is distributed on core holding unit rock core rubber sleeve.During handling can with rock core rubber sleeve from ectosome into
Enter or take out, have the advantages that easy to loading and unloading.Further, since pressure tap, which on rubber sleeve, avoids pressure measurement pipeline, passes through ectosome,
Improve the leakproofness of core holding unit.Multiple pressure taps are also set up in the core holding unit：It is set every 0.25m~0.5m
Put pressure tap, regular distribution pressure tap can accurately during test experience polylith rock core in the pressure change of different position
Change, avoid causing part rock core areal pressure value that can not detect since pressure tap is few.
Preferred according to the present invention, the length of the core holding unit is 1m~2m, and internal diameter is 0.025m~0.075m.This
The advantages of design can preferably reflect complicated heavy crude reservoir gas injection handle up during near wellbore zone radial direction pressure leak process, it is closer
In the actual huff and puff process of oil reservoir.
Preferred according to the present invention, the artificial foam oil generation observation window includes visual window ectosome, in the visual window
The two blocks of thickening glass set in vivo, the flow channel set among the thickening glass, in one end of the flow channel
Visual window entrance is provided with, the other end of the flow channel is provided with visual window outlet, the visual window ectosome is by engraving
The visual window that sky is set is connected with the thickening glass.In practical applications, the artificial foam oil generation observation window bears to press
Power is more than 10MPa, and bearing temperature is more than 50 DEG C.The artificial foam oil generates visual window as cube, visual window ectosome size
Scope：Width is 60-100mm, length 140-180mm, is highly 40-60mm；The visual size range of visual window：Width
For 5-10mm, length 50-80mm.It thickeies thickness of glass and is more than 1.5cm, flow channel height is such as high between 1mm~5mm
Degree is more than 5mm, and viscous crude amount is excessive in flow channel, and source light is difficult to penetrate viscous crude and influence to observe artificial foam oil phenomenon,
If height is less than 1mm, flow channel is too small, and viscous crude, which can not be successfully, flows through flow channel, results in blockage.During observation, in the people
The one side of work foam oil generation observation window sets light source, is taken the photograph in the opposite side of the artificial foam oil generation observation window using high definition
Camera obtains experimental image.
Preferred according to the present invention, the visual window ectosome is fixedly connected by bolt and bolt hole with thickening glass, excellent
Choosing, it is provided with decompression gasket between the visual window ectosome and thickening glass.Ectosome and thickening glass pass through bolt and spiral shell
Keyhole connects.Gasket is located at ectosome and thickeies among glass, for the pressure for reducing ectosome with thickening glass, prevents from thickening glass
It ruptures under high pressure.
It is preferred according to the present invention, it is also associated with nitrogen cylinder in the back-pressure valve.
It is preferred according to the present invention, further include the first constant speed and constant pressure pump of driving oil vessel living and stratum water container；Driving
The second constant speed and constant pressure pump of oil-soluble foaming agent container and mixed gas container.
It is preferred according to the present invention, it is persevering in the external setting of the core holding unit and artificial foam oil generation observation window
Incubator.For simulating the hot conditions of actual oil reservoir.
It is preferred according to the present invention, it further includes to monitor core holding unit import, the computer of the corresponding parameter in outlet, it is described
Corresponding parameter includes pressure measurement point pressure, inlet pressure, outlet pressure and production fluid weight in core holding unit.The computer passes through
Corresponding sensor is corresponding respectively to gather different parameters.
Preferred according to the present invention, the core holding unit includes ectosome, and the is respectively arranged in the both sides of the ectosome
One rock core plug and the second rock core plug are provided with the first ectosome plug, described second in the first rock core plug periphery
Rock core plug periphery is provided with the second ectosome plug；Rock core rubber sleeve is axially provided in the ectosome, in the rock core glue
Pressure tap and pressure measurement pipeline are respectively arranged on leather sheath, inlet and outlet are additionally provided on the ectosome；Outside in vivo
Bottom is axially disposed with supporting rod and supporting bracket, and the rock core rubber sleeve periphery is provided with confining pressure chamber；In the ectosome
Both sides be respectively core holding unit entrance and core holding unit outlet.
Preferred according to the present invention, the gas measurement system includes sink, and supporting rack is provided on the sink,
The first graduated cylinder and the second graduated cylinder are respectively arranged between the sink and supporting rack, first is respectively arranged on support frame as described above
Liquid inlet control valve, the first emptying control valve, the first air intake control valve, the second air intake control valve, the second emptying control valve and second
Liquid inlet control valve；The second emptying control valve is connected by the second threeway, the second liquid inlet control valve with second graduated cylinder, the
Two outlets are connected with second threeway, and second air intake control valve is connected with second graduated cylinder；The first emptying control
Valve processed is connected by the first threeway, the first liquid inlet control valve with first graduated cylinder, and first outlet is connected with first threeway,
First air intake control valve is connected with first graduated cylinder；
Strengthen mixed gas such as above-mentioned complicated heavy crude reservoir oil-soluble foaming agent to handle up the application process of experimental provision, including
Step is as follows：
1) polylith rock core is sequentially loaded into the core holding unit, simulates actual oil reservoir；
2) injection fluid is prepared, including oil living, water flooding, mixed gas, oil-soluble foaming agent solution；
3) the core holding unit entrance is opened, by rock core saturation water flooding and oil living, the average hole of measurement polylith rock core
Porosity φ and mean permeability calculate saturation work oil quality mIt is formerIt is averaged initial oil saturation with rock core, closes open institute afterwards
Core holding unit entrance is stated, opens core holding unit outlet, passes through rock core pressure in back-pressure valve reduction core holding unit to target
Reservoir pressure；
4) simulate oil-soluble foaming agent and strengthen mixed gas and handle up injection stage：Core holding unit outlet is opened, from rock core
Clamper outlet injection oil-soluble foaming agent and mixed gas；
5) oil-soluble foaming agent reinforcing mixed gas is simulated to handle up the stewing well stage：Close core holding unit outlet；Due to note
The foaming agent entered be oil-soluble, can dissolve each other with viscous crude, and inject mixed gas be dissolved under high pressure by diffusion it is thick
Oil plays the role of reducing viscosity of thickened oil；
6) oil-soluble foaming agent reinforcing mixed gas is simulated to handle up the production phase：The core holding unit outlet is opened, it is right
Viscous crude carries out decompression exploitation in the core holding unit, and the mixed gas being precipitated from viscous crude is under the action of oil-soluble foaming agent
It is dispersed in viscous crude and forms artificial foam oil；
7) step 4)~step 6) is repeated, carries out multicycle oil-soluble foaming agent and strengthen mixed gas handling up process, is calculated
Oil-soluble foaming agent strengthens mixed gas and handles up the cycle recovery percent of reserves R that respectively handles upGulp down iWith ultimate recovery RIt gulps down；
8) rock core, measurement output oil density, four constituent contents are observed：Asphalitine, colloid, fragrance point, cycloalkane, calculate
Rock core remaining oil saturation, water saturation and gas saturation are handled up for evaluating oil-soluble foaming agent reinforcing mixed gas
Experiment effect.
Preferred according to the present invention, in the step 1), the specific method of the actual oil reservoir of simulation is as follows：
1.1.) length of the core holding unit is 1m~2m, and internal diameter is 0.025m~0.075m；The technical characteristic can be anti-
Near wellbore zone radial direction pressure leak process during complicated heavy crude reservoir gas injection is handled up is reflected, closer to the actual huff and puff mistake of oil reservoir
Journey；
1.2.) sand pack quantity is 8~10 pieces in the core holding unit, and rock core measures before being packed into core holding unit
The quality m of every block of rock coreRock n, length, calculate every piece of rock core volume V；If rock core block number is very little, every piece of rock core length is long, all difficult
To obtain or make.If rock core block number is too many, every piece of rock core length is too short, and the gap that the splicing of polylith rock core generates is excessive, it is difficult to
The flow event of fluid in actual oil reservoir is accurately reflected, therefore, the design is determined by practice many times and core holding unit
Matched sand pack quantity；
1.3.) multiple pressure taps are set in the core holding unit；According to rock core length, set every 0.25m~0.5m
Put pressure tap, can accurately during test experience polylith rock core different position pressure change, avoid since pressure tap is few
And cause part rock core areal pressure value that can not detect；
1.4.) the core holding unit outlet is connected with artificial foam oil generation visual window, for observe and evaluate oil reservoir
Artificial foam oil generation situation under temperature and pressure；Artificial foam oil generation visual window bears pressure more than 10MPa, bearing temperature
More than 50 DEG C；The artificial foam oil generates visual window as cube, ectosome size range：Width is 60-100mm, and length is
140-180mm is highly 40-60mm.Visual size range：Width is 5-10mm, length 50-80mm, is highly 1-5mm.
1.5. confining pressure) is applied to rock core using the core holding unit, for simulating shadow of the overlying formation pressure to rock core
It rings；
It is preferred according to the present invention, in the step 2), it is molten with oil living, mixed gas, oil-soluble foaming agent to prepare injection
The method of liquid is：
2.1.) according to Reservoir Crude Oil dissolved gas oil ratio and Gas Compression Factor, using sample instrument, in reservoir pressure and temperature
Lower configuration oil living, for simulating the crude oil in actual oil reservoir, and is directed into oil vessel living using sample instrument；Oil living under formation condition
Viscosity is more than 5000mPas；
2.2. different composition propane and natural oxygen mixture phasor) are calculated, in the case where pressure is injected in experiment, selects dew point line
Corresponding temperature is less than a phasor within 5 DEG C of reservoir temperature.Propane and natural oxygen mixture composition corresponding to the phasor
For propane and natural oxygen mixture composition optimal under the temperature of the oil reservoir and injection pressure.Propane and natural gas under the composition
Mixed gas is ensured to be gas phase state, and close to dew point line, is dissolved in viscous crude with stronger viscosity reduction ability, afterwards, according to this third
Alkane and natural gas composition configuration mixed gas；
2.3.) oil-soluble foaming agent is non-ionic fluorinated blowing agent, and oil-soluble foaming agent mass concentration is 0.01wt%
~0.5wt%.Oil-soluble foaming agent mass concentration is calculated by following formula；
In public formula (I), mBubbleFor oil-soluble foaming agent quality.
It is preferred according to the present invention, the step 2.2.) in, the process for configuring mixed gas is as follows：At atmosheric pressure
Propane gas is injected into mixed gas container, until on mixed gas container pressure to propane dew-point pressure, makes propane liquid
Change；According to optimization gained mixed gas composition injection natural gas, and adjust mixed gas container volume and cause mixed gas container
Pressure reaches the injection pressure of experiment needs.Since liquefied propane has higher diffusivity, can be made by the above method
It obtains propane and natural gas quickly mixes, accelerate the speed that mixed gas reaches balance.
It is preferred according to the present invention, the step 2.3.) in, since experiment is relatively low with oil-soluble density of foaming agent, prepare
When oil-soluble foaming agent is molten, the oil-soluble foaming agent is dissolved in formation oil-soluble foaming agent solution in kerosene；So as to reduce oil
Consumption in dissolubility foaming agent injection process in container and pipeline, so as to ensure that oil-soluble foaming agent smoothly injects rock core.
Preferred according to the present invention, step 4) the simulation oil-soluble foaming agent strengthens mixed gas and handles up injection stage
Step is as follows：
4.1. core holding unit outlet) is opened, is injected oil-soluble foaming agent solution with certain pressure, injection pressure is higher than
Rock core 0.5~1MPa of average pressure stops when solution all injects, and closes core holding unit outlet；
4.2. core holding unit outlet) is opened, injects mixed gas, injection pressure is more than 5MPa, until core holding unit
Outlet pressure is equal to injection pressure；Time, core holding unit entrance, outlet and each pressure measurement point pressure are recorded in the above process；Root
The injection gaseous mixture scale of construction is calculated according to mixed gas state equation.By the above process, the oil-soluble foaming agent first injected can be
Enter rock core depths under the action of injection mixed gas afterwards, increase the contact range of oil-soluble foaming agent and viscous crude, it is easier to raw
Into artificial foam oil.
Preferred according to the present invention, simulation oil-soluble foaming agent strengthens mixed gas and handles up the stewing well stage in the step 5)
Method it is as follows：
When the stewing well time is 12-48 small, time, core holding unit entrance, core holding unit outlet are recorded during stewing well
And each pressure measurement point pressure；
When the pressure changes over time smaller, show that mixed gas is dissolved in the speed reduction of viscous crude, be further continued for boiling in a covered pot over a slow fire
Well influences the production time, and therefore, the stewing well stage terminates, and closes core holding unit outlet.
Preferred according to the present invention, step 6) the simulation oil-soluble foaming agent strengthens mixed gas and handles up the production phase
Method is as follows：
Core holding unit outlet is opened, rock core pressure in the core holding unit is reduced with the pressure drop rate of 2-4MPa/h,
In order to avoid air enters oil reservoir, and ensure that follow-up phase has higher pressure, when pressure is down to 1~2MPa, close rock
Heart clamp holder exports, and the production phase terminates；
Time, oil production m are recorded in the above processGulp down 1, gas production, core holding unit entrance, core holding unit outlet and
Pressure measurement point pressure, and pass through high-definition camera and the artificial foam oil generation situation of artificial foam oil generation visual window observation；
Cumulative oil production, cumulative gas production and gas-oil ratio are calculated, and passes through the following formula (II) calculating first and handles up the cycle
Recovery percent of reserves RGulp down 1：
It is preferred according to the present invention, in the step 7), step 4)-step 6) is repeated, carries out 5~10 round oil-solubles hair
Infusion strengthens mixed gas and handles up process；
According to oil field development cost and oil price, handle up and terminate recovery percent of reserves between 1%~5%, the extraction of i-th of round
Degree RGulp down iLess than handle up terminate recovery percent of reserves when, oil-soluble foaming agent, which strengthens mixed gas and handles up, to be improved recovery ratio effect and disappears,
Experiment terminates；
Record time, oil production m during each cycle handles upGulp down i, gas production, core holding unit entrance, core holding unit go out
Mouth and each pressure measurement point pressure generate observation window by artificial foam oil and observe artificial foam oil generation situation, calculate and accumulate production
Oil mass, cumulative gas production and gas-oil ratio calculate the cycle recovery percent of reserves R that respectively handles up afterwardsGulp down iWith ultimate recovery RIt gulps downIt is as follows：
Preferred according to the present invention, the step 8) is as follows：
8.1. the density p of output oil) is measuredoAnd four constituent content：Asphalitine, colloid, saturation are divided, fragrance point；
8.2. the quality for) weighing each block of rock core is mOil+water n, rock core is put into 50 DEG C~80 DEG C insulating boxs 1~2 day, rock
The quality for weighing each block of rock core after moisture evaporation in the heart is mOily n, therefore, each block of rock is calculated by the following formula (IV)
Heart remaining oil saturation Son, water saturation SwnWith gas saturation Sgn：
Sgn=1-Son-Swn (IV)
Wherein, ρwThe density of water, ρoRespectively oily density, n is core numbers；
8.3.) according to measurement output oil density, four constituent contents, remaining oil saturation distribution, Production development, evaluation oil
Dissolubility foaming agent strengthens mixed gas and handles up experiment effect.
The present invention has the beneficial effect that：
1st, the present invention combines natural gas and propane each advantage, replaces existing pure gas by injecting mixed gas, i.e.,
Solve the problems, such as that natural gas solvability is low, viscosity reducing effect is poor, and it is low to solve propane dew-point pressure, easily liquefies and dosage
The problem of excessive, provides a kind of new method to improve complicated recovery factor of heavy oil reservoir.
2nd, the present invention forms artificial foam oil, thus will be special by oil-soluble foaming agent in the huff and puff production phase
Natural foam oil phenomenon present in heavy crude reservoir decompression development process is introduced into during huff and puff, solves traditional gas injection
The injection quick output of gas during handling up, it is difficult to which the problem of being dissolved in viscous crude has reached and greatly improved complicated recovery factor of heavy oil reservoir
Purpose.There is larger application prospect for complicated Development of Viscous Crude Oil.
3rd, the artificial foam oil generation visual window that the present invention designs has the advantages that high pressure resistant, high temperature, visual, Ke Yishi
Show Real Time Observation under high pressure and high temperature, the formational situation for judging artificial foam oil, solve nothing under artificial foam oil reservoir condition
The problem of method is observed, effective means are provided for the feasibility of evaluation method.
4th, core holding unit size of the invention is more than existing core holding unit, can preferably reflect complicated heavy crude reservoir
Radial direction pressure leak process near wellbore zone during huff and puff closer to the actual huff and puff process of oil reservoir, and passes through interior pressure measurement
Mode, when solving the problems, such as large scale core holding unit landing hire, laborious, poor sealing.
5th, the gas measurement system that the present invention designs can continuously measure gas volume, avoid what interval was measured and generated
Artificial measurement error, it is big to solve large scale core holding unit output gas flow, the problem that can not accurately measure.
Description of the drawings
Fig. 1 is respectively different composition propane and natural oxygen mixture phasor；
Fig. 2 is the rearview of gas measurement system figure of the present invention；
In fig. 2,17-1, the first liquid inlet control valve；17-2, the first emptying control valve；17-3, the first air intake control valve；
17-4, the second air intake control valve；17-5, the second emptying control valve；17-6, the second liquid inlet control valve；17-7, supporting rack；17-8、
Second graduated cylinder；17-9, sink；17-10, the first graduated cylinder；17-11, the first threeway；17-12, the second threeway；17-13, first go out
Mouthful；17-14, second outlet.
Fig. 3 cumulative oil productions and recovery percent of reserves change over time figure；
Fig. 4 cumulative gas productions and gas-oil ratio change over time figure；
11 step 4) period 1 of Fig. 5 embodiments core holding unit entrance, outlet and each pressure measurement point pressure become at any time
Change figure；
11 period 1 of Fig. 6 embodiments boils in a covered pot over a slow fire well stage core holding unit entrance, outlet and each pressure measurement point pressure at any time
Variation diagram；
11 step 6) period 1 of Fig. 7 embodiments core holding unit entrance, outlet and each pressure measurement point pressure become at any time
Change figure；
11 period 1 of Fig. 8 embodiments artificial foam oil generation situation map；
Core holding unit entrance, outlet and each pressure measurement point pressure during 11 each round of Fig. 9 embodiments is handled up；
Every piece of rock core remaining oil saturation of Figure 10；
Figure 11 is the sectional structure chart of core holding unit of the present invention；
In fig. 11,7-1, the first rock core plug；7-2, the first ectosome plug；7-3, ectosome；7-4, rock core rubber sleeve；7-
5th, rock core；7-6, pressure tap；7-7, pressure measurement pipeline；7-8, water inlet；7-9, water outlet；7-10, the second ectosome plug 2；7-11、
Second rock core plug；7-12, supporting bracket；7-13, steady arm；7-14, confining pressure chamber.
Figure 12 embodiments 12 period 1 gas injection entrance, outlet and each pressure measurement point pressure；
12 period 1 of Figure 13 embodiments boils in a covered pot over a slow fire well entrance, outlet and each pressure measurement point pressure；
Figure 14 embodiments 12 period 1 oil recovery entrance, outlet and each pressure measurement point pressure；
12 period 1 of Figure 15 embodiments artificial foam oil generation situation map；
Entrance, outlet and each pressure measurement point pressure during 12 each round of Figure 16 embodiments is handled up；
Figure 17 is the structure diagram of experimental provision of the present invention；
In fig. 17,1, constant speed and constant pressure pump；2nd, oil vessel living；3rd, stratum water container；4th, pressure gauge；5th, valve；6th, rock core
Clamper entrance；7th, core holding unit；8th, core holding unit exports；9th, high-definition camera；10th, artificial foam oil generation observation
Window；11st, light source；12nd, insulating box；13rd, back-pressure valve；14th, nitrogen cylinder；15th, separator；16th, high Accuracy Electronic Balance；17th, gas
Measuring system；18th, vacuum pump；19th, oil-soluble foaming agent container；20th, mixed gas container；21st, constant speed and constant pressure pumps；22nd, computer；
Figure 18 is the front view of artificial foam oil observation window of the present invention；
Figure 19 is the top view of artificial foam oil observation window of the present invention；
In Figure 11,19,10-1, visual window entrance；10-2, visual window ectosome；10-3, bolt；10-4, glass is thickeied；
10-5, visual windows；10-6, decompression gasket；10-7, visual window outlet；10-8, flow channel；10-9, bolt hole.
Specific embodiment
The present invention is described in detail with reference to example and Figure of description, but not limited to this.
As shown in Fig. 1-Figure 19.
Embodiment 1,
A kind of complexity heavy crude reservoir oil-soluble foaming agent strengthens mixed gas and handles up experimental provision, including：Core holding unit,
Stratum water container, oil vessel living are connected in parallel in the core holding unit entrance, in parallel connect is exported in the core holding unit
It is connected to oil-soluble foaming agent container and mixed gas container；Artificial foam oil is also connected in turn in core holding unit outlet
Generate observation window, back-pressure valve and gas-liquid separation device.
The gas-liquid separation device includes：Separator, high Accuracy Electronic Balance, gas measurement system and vacuum pump.
The core holding unit is interior pressure-measuring type core holding unit；Preferably, the pressure tap distribution of the core holding unit
In on core holding unit rock core rubber sleeve.
Embodiment 2,
A kind of complicated heavy crude reservoir oil-soluble foaming agent strengthens mixed gas and handles up experimental provision as described in Example 1,
Difference lies in the length of the core holding unit is 1m~2m, and internal diameter is 0.025m~0.075m for it.
Embodiment 3,
A kind of complicated heavy crude reservoir oil-soluble foaming agent strengthens mixed gas and handles up experimental provision as described in Example 1,
Difference lies in the artificial foam oil generates two pieces that observation window includes visual window ectosome, set in the visual window body for it
Glass is thickeied, the flow channel set among the thickening glass is provided with visual window in one end of the flow channel and enters
Mouthful, the other end of the flow channel is provided with visual window outlet, the visual window that the visual window ectosome is set by hollow out
It is connected with the thickening glass.In practical applications, the artificial foam oil generation observation window bears pressure more than 10MPa, holds
It is more than 50 DEG C by temperature.The artificial foam oil generates visual window as cube, visual window ectosome size range：Width is 60-
100mm, length 140-180mm are highly 40-60mm；The visual size range of visual window：Width is 5-10mm, length
For 50-80mm.It thickeies thickness of glass and is more than 1.5cm, for flow channel height between 1mm~5mm, such as height is more than 5mm, flowing
Viscous crude amount is excessive in passage, and source light is difficult to penetrate viscous crude and influence to observe artificial foam oil phenomenon, and such as height is less than 1mm,
Flow channel is too small, and viscous crude, which can not be successfully, flows through flow channel, results in blockage.During observation, seen in the artificial foam oil generation
The one side for examining window sets light source, and lab diagram is obtained using high-definition camera in the opposite side of the artificial foam oil generation observation window
Picture.
Embodiment 4,
A kind of complicated heavy crude reservoir oil-soluble foaming agent strengthens mixed gas and handles up experimental provision as described in Example 3,
Difference lies in the visual window ectosome is fixedly connected by bolt and bolt hole with thickening glass, it is preferred that described visual for it
Outside window decompression gasket is provided between body and thickening glass.Ectosome is connected with glass is thickeied by bolt with bolt hole.Gasket position
It in ectosome and thickeies among glass, for the pressure for reducing ectosome with thickening glass, prevents that thicken glass ruptures under high pressure.
Embodiment 5,
A kind of complicated heavy crude reservoir oil-soluble foaming agent strengthens mixed gas and handles up experimental provision as described in Example 1,
Difference lies in be also associated with nitrogen cylinder in the back-pressure valve for it.
Embodiment 6,
A kind of complicated heavy crude reservoir oil-soluble foaming agent strengthens mixed gas and handles up experimental provision as described in Example 1,
Difference lies in the first constant speed and constant pressure for further including driving oil vessel living and stratum water container pumps for it；Oil-soluble foaming agent is driven to hold
Second constant speed and constant pressure of device and mixed gas container pumps.
Embodiment 7,
A kind of complicated heavy crude reservoir oil-soluble foaming agent strengthens mixed gas and handles up experimental provision as described in Example 1,
Difference lies in be provided with insulating box in the outside of the core holding unit and artificial foam oil generation observation window for it.
Embodiment 8,
A kind of complicated heavy crude reservoir oil-soluble foaming agent strengthens mixed gas and handles up experimental provision as described in Example 7,
Difference lies in further include to monitor core holding unit import, the computer of the corresponding parameter in outlet, the corresponding parameter includes rock for it
Pressure measurement point pressure, inlet pressure, outlet pressure and production fluid weight in heart clamp holder.The computer passes through corresponding sensor point
Different parameters Dui Ying not gathered.
Embodiment 9,
A kind of complicated heavy crude reservoir oil-soluble foaming agent strengthens mixed gas and handles up experimental provision as described in Example 1,
Difference lies in, the core holding units to include ectosome for it, and the first rock core plug and the are respectively arranged in the both sides of the ectosome
Two rock core plugs are provided with the first ectosome plug in the first rock core plug periphery, are set in the second rock core plug periphery
It is equipped with the second ectosome plug；Rock core rubber sleeve is axially provided in the ectosome, is set respectively on the rock core rubber sleeve
There are pressure tap and pressure measurement pipeline, inlet and outlet are additionally provided on the ectosome；Internal bottom is axially set successively outside
Supporting rod and supporting bracket are equipped with, the rock core rubber sleeve periphery is provided with confining pressure chamber；It is rock respectively in the both sides of the ectosome
Heart clamp holder entrance and core holding unit outlet.
It is as follows that core holding unit installs the step of rock core：By the first ectosome plug 7-2 of core holding unit successively with first
Rock core plug 7-1 is connected with ectosome 7-3, keeps sealing；Afterwards, the first ectosome plug 7-2 is connected with rock core rubber sleeve, seals,
And be inserted into ectosome 7-3 so that rock core rubber sleeve 7-4 is connected with the first ectosome plug 7-2, until the first ectosome plug 7-2 with
Ectosome 7-3 is connected, and keeps sealing；
Rock core is sequentially loaded into from core holding unit outlet by rock core erector, filter paper is added between every block of rock core,
The end effect that rock core junction during fluid neuron network generates is removed, records the section of last block rock core to core holding unit
The distance L of outlet；
Second rock core plug 7-11 is connected with the second ectosome plug 7-10 so that the first rock core plug 7-1 enters first
The distance of ectosome plug 7-2 is L, so that it is guaranteed that the first rock core plug 7-1, rock core and the first rock core plug 7-2 are closely coupled；
It is as follows to apply the step of confining pressure for rock core in core holding unit：Distilled water is injected by ectosome 7-3 water inlets 7-8, directly
It being flowed out to injection water from the water outlet 7-9 of core holding unit, it is ensured that confining pressure chamber air has been discharged, and full of distilled water；Afterwards,
Water outlet 7-9 is closed, continues to inject distilled water until pressure is enclosed higher than rock core 1~5MPa of pressure described in confining pressure chamber 7-14
Pressure intracavitary is provided with pressure tap 7-6, so as to fulfill the addition of rock core confining pressure；There are the works of following three aspects for the addition of confining pressure
With：1. overlying formation pressure effectively existing for the actual oil reservoir of simulation；2. rock core rubber sleeve is kept to be sealed with rock core plug, reality is prevented
Oil, gas and water are flowed out from core holding unit during testing；3. keeping rock core rubber sleeve and rock core 7-5 intimate surface contacts, prevent
Oil, gas and water are around rock core 7-5, from the gap channelling of rock core rubber sleeve and core surface.
Embodiment 10,
A kind of complicated heavy crude reservoir oil-soluble foaming agent strengthens mixed gas and handles up experimental provision as described in Example 1,
Difference lies in the gas measurement system includes sink, supporting rack is provided on the sink, in the sink and support for it
The first graduated cylinder and the second graduated cylinder are respectively arranged between frame, the first liquid inlet control valve, are respectively arranged on support frame as described above
One emptying control valve, the first air intake control valve, the second air intake control valve, the second emptying control valve and the second liquid inlet control valve；Institute
The second emptying control valve is stated by the second threeway, the second liquid inlet control valve with second graduated cylinder to be connected, second outlet with it is described
Second threeway connects, and second air intake control valve is connected with second graduated cylinder；The first emptying control valve passes through first
Threeway, the first liquid inlet control valve are connected with first graduated cylinder, and first outlet is connected with first threeway, first air inlet
Control valve is connected with first graduated cylinder；
Gas production is measured by gas measurement system：
1. gas measurement system the first liquid inlet control valve 17-1 and the second liquid inlet control valve 17-6 is opened, it will by vacuum pump
Water sucking the first graduated cylinder 17-10 and the second graduated cylinder 17-11 in sink 17-9, is then shut off the first liquid inlet control valve 17-1 and the
Two liquid inlet control valve 17-6 record water volume V11 and V21 in the first graduated cylinder 17-10 and the second graduated cylinder 17-11 respectively；
2. opening into the first gas control valve 17-3, gas enters the first graduated cylinder 17-10, due to the entrance of gas, the first amount
Water is discharged into sink 17-9 in cylinder 17-10.When water is soon all discharged in the first graduated cylinder 17-10, the first air intake control valve is closed
17-3 records the first graduated cylinder water 17-10 volume V11 ', passes through V11 and V11 ' difference, calculate tolerance Vg11；At the same time, open
Second air intake control valve 17-3, and open the first liquid inlet control valve 17-1, by vacuum pump by the water sucking the in sink 17-9
One graduated cylinder 17-10 records the first graduated cylinder 17-10 water volumes V12；
3. gas enters the second graduated cylinder 17-11, due to the entrance of gas, water is discharged into sink 17-9 in the second graduated cylinder 17-11.
When water is soon all discharged in the second graduated cylinder 17-8, the second air intake control valve 17-4 is closed, records the second graduated cylinder 17-8 water bodys
Product V21 ', passes through V21 and V21 ' difference, calculate tolerance Vg21；At the same time, the second liquid inlet control valve 6 is opened, passes through vacuum pump
Water in sink 17-9 is sucked into the second graduated cylinder 17-8, records the first graduated cylinder 17-10 water volumes V22；
2. and 3. 4. total gas quantum of output is then calculated by following formula, realizes gas without gas output when step carries out n times altogether
The continuous measurement of body.
In formula, Vg1nAnd Vg2nRespectively the first graduated cylinder 17-10 and the second graduated cylinder 17-11 n-ths measure gas production.
Embodiment 11,
What the complicated heavy crude reservoir oil-soluble foaming agent as described in embodiment 1-10 strengthened that mixed gas handles up experimental provision should
It is as follows including step with method：
1) polylith rock core is sequentially loaded into the core holding unit, simulates actual oil reservoir；
2) injection fluid is prepared, including oil living, water flooding, mixed gas, oil-soluble foaming agent solution；
3) the core holding unit entrance is opened, by rock core saturation water flooding and oil living, the average hole of measurement polylith rock core
Porosity φ and mean permeability calculate saturation work oil quality mIt is formerIt is averaged initial oil saturation with rock core, closes open institute afterwards
Core holding unit entrance is stated, opens core holding unit outlet, passes through rock core pressure in back-pressure valve reduction core holding unit to target
Reservoir pressure；In the present embodiment, measurement gained rock core mean permeability, average pore φ, saturation work oil quality mIt is formerWith it is average
Oil saturation is shown in Table 1, and reducing rock core pressure to target reservoir pressure in core holding unit by back-pressure valve is
3.64MPa。
1 rock core physical parameter table of table
| Mean permeability (μm3) | Average pore φ (%) | Saturation work oil quality mIt is former(g) | Average oil saturation (%) |
| 27.69 | 41.13 | 154 | 88.00 |
4) simulate oil-soluble foaming agent and strengthen mixed gas and handle up injection stage：Core holding unit outlet is opened, from rock core
Clamper outlet injection oil-soluble foaming agent and mixed gas；
5) oil-soluble foaming agent reinforcing mixed gas is simulated to handle up the stewing well stage：Close core holding unit outlet；Due to note
The foaming agent entered be oil-soluble, can dissolve each other with viscous crude, and inject mixed gas be dissolved under high pressure by diffusion it is thick
Oil plays the role of reducing viscosity of thickened oil；
6) oil-soluble foaming agent reinforcing mixed gas is simulated to handle up the production phase：The core holding unit outlet is opened, it is right
Viscous crude carries out decompression exploitation in the core holding unit, and the mixed gas being precipitated from viscous crude is under the action of oil-soluble foaming agent
It is dispersed in viscous crude and forms artificial foam oil；
7) step 4)~step 6) is repeated, carries out multicycle oil-soluble foaming agent and strengthen mixed gas handling up process, is calculated
Oil-soluble foaming agent strengthens mixed gas and handles up the cycle recovery percent of reserves R that respectively handles upGulp down iWith ultimate recovery RIt gulps down；
8) rock core, measurement output oil density, four constituent contents are observed：Asphalitine, colloid, fragrance point, cycloalkane, calculate
Rock core remaining oil saturation, water saturation and gas saturation are handled up for evaluating oil-soluble foaming agent reinforcing mixed gas
Experiment effect.
In the step 1), the specific method of the actual oil reservoir of simulation is as follows：
1.1.) length of the core holding unit is 1m~2m, and internal diameter is 0.025m~0.075m；The technical characteristic can be anti-
Near wellbore zone radial direction pressure leak process during complicated heavy crude reservoir gas injection is handled up is reflected, closer to the actual huff and puff mistake of oil reservoir
Journey, the length of core holding unit is 1m, internal diameter 0.025m in the present embodiment；
1.2.) sand pack quantity is 8~10 pieces in the core holding unit, and rock core measures before being packed into core holding unit
The quality m of every block of rock coreRock n, length, calculate every piece of rock core volume V；If rock core block number is very little, every piece of rock core length is long, all difficult
To obtain or make.If rock core block number is too many, every piece of rock core length is too short, and the gap that the splicing of polylith rock core generates is excessive, it is difficult to
The flow event of fluid in actual oil reservoir is accurately reflected, therefore, the design is determined by practice many times and core holding unit
Matched sand pack quantity；
Rock core quantity is 8 pieces in the present embodiment, and quality, length and the volume V of every block of rock core are shown in Table 2：
Each rock core base data table in 2 embodiment 11 of table
| Core numbers n | Length (cm) | mRock n(g) | Volume V (cm3) |
| 1 | 10.5 | 78.54 | 51.54 |
| 2 | 10.8 | 71.86 | 49.68 |
| 3 | 12.4 | 81.74 | 57.04 |
| 4 | 11.1 | 72.79 | 51.06 |
| 5 | 12.5 | 84.22 | 57.50 |
| 6 | 11.6 | 77.86 | 53.36 |
| 7 | 12.1 | 82.13 | 55.66 |
| 8 | 11.7 | 80.87 | 53.82 |
1.3.) multiple pressure taps are set in the core holding unit；According to rock core length, set every 0.25m~0.5m
Put pressure tap, can accurately during test experience polylith rock core different position pressure change, avoid since pressure tap is few
And cause part rock core areal pressure value that can not detect；In the present embodiment, core holding unit sets a pressure measurement every 0.25m
Point, totally 4 pressure taps；
1.4.) the core holding unit outlet is connected with artificial foam oil generation visual window, for observe and evaluate oil reservoir
Artificial foam oil generation situation under temperature and pressure；Artificial foam oil generation visual window bears pressure more than 10MPa, bearing temperature
More than 50 DEG C；The artificial foam oil generates visual window as cube, ectosome size range：Width is 60-100mm, and length is
140-180mm is highly 40-60mm.Visual size range：Width is 5-10mm, length 50-80mm, thickeies thickness of glass
More than 1.5cm, flow channel height is between 1mm~5mm, and such as height is more than 5mm, and viscous crude amount is excessive in flow channel, light source
Light is difficult to penetrate viscous crude and influence to observe artificial foam oil phenomenon, and such as height is less than 1mm, and flow channel is too small, and viscous crude can not
Flow channel smoothly is flowed through, is resulted in blockage.During observation, light source is set in the one side of the artificial foam oil generation observation window,
The opposite side of the artificial foam oil generation observation window obtains experimental image using high-definition camera.Ectosome size in the present embodiment
Scope：Width is 80mm, length 160mm, is highly 53mm.Visual size range：Width is 10mm, length 50mm, most
Bear pressure 15MPa, maximum 150 DEG C of bearing temperature greatly.Thickening thickness of glass is 1.7cm, flow channel height 1mm.
1.5. confining pressure) is applied to rock core using the core holding unit, for simulating shadow of the overlying formation pressure to rock core
It rings；In the present embodiment, remain that confining pressure pressure is more than rock core pressure 3MPa.
In the step 2), prepare injection is with oil living, mixed gas, the method for oil-soluble foaming agent solution：
2.1.) according to Reservoir Crude Oil dissolved gas oil ratio and Gas Compression Factor, using sample instrument, in reservoir pressure and temperature
Lower configuration oil living, for simulating the crude oil in actual oil reservoir, and is directed into oil vessel living using sample instrument；Oil living under formation condition
Viscosity is more than 5000mPas；In the present embodiment, crude oil dissolved gas oil ratio is 15m3/m3, Gas Compression Factor 0.96, in oil
It is that experiment oil living is configured at 8.65MPa and 54.2 DEG C to hide pressure and temperature.Oil viscosity living is under formation condition
24700mPa·s。
2.2. different composition propane and natural oxygen mixture phasor) are calculated, in the case where pressure is injected in experiment, selects dew point line
Corresponding temperature is less than a phasor within 5 DEG C of reservoir temperature.Propane and natural oxygen mixture composition corresponding to the phasor
For propane and natural oxygen mixture composition optimal under the temperature of the oil reservoir and injection pressure.Propane and natural gas under the composition
Mixed gas is ensured to be gas phase state, and close to dew point line, is dissolved in viscous crude with stronger viscosity reduction ability, afterwards, according to this third
Alkane and natural gas composition configuration mixed gas；
Propane gas is injected into mixed gas container at atmosheric pressure, until mixed gas container pressure to propane reveals
On point pressure, propane is made to liquefy；According to optimization gained mixed gas composition injection natural gas, and adjust mixed gas container body
Product is so that mixed gas container pressure reaches the injection pressure of experiment needs.Since liquefied propane has higher diffusivity,
By the above method can propane and natural gas quickly mix, accelerate the speed that mixed gas reaches balance.
In the present embodiment, calculate different compositions propane and natural oxygen mixture phasor as shown in Figure 1, experiment inject
Under pressure 6MPa, phasor dew point line corresponding temperature shown in Fig. 1 embodiments 11 is 49.8 DEG C, less than 54.2 DEG C of reservoir temperature 5 DEG C it
It is interior.Therefore, the propane corresponding to the phasor and natural oxygen mixture composition are 54.2 DEG C of the temperature in Tibetan, inject under pressure 6MPa most
Excellent propane and natural oxygen mixture composition.The natural gas and propane mixture body composition are 54:46.Afterwards, according to this third
Alkane and natural gas composition configuration mixed gas.
2.3.) oil-soluble foaming agent is non-ionic fluorinated blowing agent, and oil-soluble foaming agent mass concentration is 0.01wt%
~0.5wt%.Oil-soluble foaming agent mass concentration is calculated by following formula；
In public formula (I), mBubbleFor oil-soluble foaming agent quality.
The step 2.3.) in, since experiment is relatively low with oil-soluble density of foaming agent, when preparation oil-soluble foaming agent is molten,
The oil-soluble foaming agent is dissolved in formation oil-soluble foaming agent solution in kerosene；So as to reduce oil-soluble foaming agent injection process
In consumption in container and pipeline, so as to ensure that oil-soluble foaming agent smoothly injects rock core.In the present embodiment, oil-soluble is injected
Density of foaming agent is 0.5wt%.
The step 4) simulation oil-soluble foaming agent strengthen mixed gas handle up injection stage the step of it is as follows：
4.1. core holding unit outlet) is opened, is injected oil-soluble foaming agent solution with certain pressure, injection pressure is higher than
Rock core 0.5~1MPa of average pressure stops when solution all injects, and closes core holding unit outlet；In the present embodiment, injection
Pressure is 4.2MPa, higher than rock core average pressure 0.56MPa.
4.2. core holding unit outlet) is opened, injects mixed gas, injection pressure is more than 5MPa, until core holding unit
Outlet pressure is equal to injection pressure；Time, core holding unit entrance, outlet and each pressure measurement point pressure are recorded in the above process；Root
The injection gaseous mixture scale of construction is calculated according to mixed gas state equation.By the above process, the oil-soluble foaming agent first injected can be
Enter rock core depths under the action of injection mixed gas afterwards, increase the contact range of oil-soluble foaming agent and viscous crude, it is easier to raw
Into artificial foam oil.In the present embodiment, mixed gas injection pressure is 6MPa, injected gas volume 1800cm3, record time, rock
Heart clamp holder entrance, outlet and each pressure measurement point pressure are as shown in Figure 5.
Step 5) the simulation oil-soluble foaming agent strengthens mixed gas and handles up the stewing well stage：Core holding unit is closed to go out
Mouthful；Since the foaming agent of injection is oil-soluble, can dissolve each other with viscous crude, and the mixed gas injected is made under high pressure by spreading
With viscous crude is dissolved in, play the role of reducing viscosity of thickened oil；
When the stewing well time is 12-48 small, time, core holding unit entrance, core holding unit outlet are recorded during stewing well
And each pressure measurement point pressure；
When the pressure changes over time smaller, show that mixed gas is dissolved in the speed reduction of viscous crude, be further continued for boiling in a covered pot over a slow fire
Well influences the production time, and therefore, the stewing well stage terminates, and closes core holding unit outlet.
In the present embodiment, 5 minutes when the stewing well time is 21 small, record time, entrance, outlet and each pressure measurement point pressure such as 6
Shown in figure.
The step 6) simulation oil-soluble foaming agent strengthen mixed gas handle up the production phase method it is as follows：
Core holding unit outlet is opened, rock core pressure in the core holding unit is reduced with the pressure drop rate of 2-4MPa/h,
In order to avoid air enters oil reservoir, and ensure that follow-up phase has higher pressure, when pressure is down to 1~2MPa, close rock
Heart clamp holder exports, and the production phase terminates；
Time, oil production m are recorded in the above processGulp down 1, gas production, core holding unit entrance, core holding unit outlet and
Pressure measurement point pressure, and pass through high-definition camera and the artificial foam oil generation situation of artificial foam oil generation visual window observation；
Cumulative oil production, cumulative gas production and gas-oil ratio are calculated, and passes through the following formula (II) calculating first and handles up the cycle
Recovery percent of reserves RGulp down 1：
In the present embodiment, rock core pressure in the core holding unit is reduced with the pressure drop rate of 3MPa/h, when pressure is down to
During 1MPa, outlet is closed, the production phase terminates.Record time, oil production (mGulp down 1) and gas production it is as shown in table 4.Core holding unit
Entrance, outlet and pressure measurement point pressure are as shown in Figure 7.Visual window is generated by artificial foam oil and observes artificial foam oil generation feelings
Condition is as shown in Figure 8.Calculate period 1 cumulative oil production and recovery percent of reserves R1The cycle accumulation as shown in figure 3, calculating first is handled up
Gas production and gas and oil are such as shown in Fig. 4.First handles up cycle recovery percent of reserves R1For 14.87%.
4 period 1 of table oil production mGulp down 1With gas production data
| Experimental period (min) | Oil production mGulp down 1(g) | Gas production (cm3) |
| 0 | 0.00 | 0 |
| 7 | 0.17 | 5 |
| 13 | 0.00 | 0 |
| 19 | 0.99 | 11 |
| 25 | 1.30 | 15 |
| 31 | 1.89 | 19 |
| 37 | 1.77 | 130 |
| 43 | 1.72 | 139 |
| 49 | 3.52 | 106 |
| 55 | 2.98 | 79 |
| 61 | 3.12 | 95 |
| 67 | 2.83 | 200 |
| 73 | 1.15 | 230 |
| 79 | 1.46 | 171 |
Preferably, in the step 7), step 4)-step 6) is repeated, it is mixed to carry out the reinforcing of 5~10 round oil-soluble foaming agents
Gas is closed to handle up process；
According to oil field development cost and oil price, handle up and terminate recovery percent of reserves between 1%~5%, the extraction of i-th of round
Degree RGulp down iLess than handle up terminate recovery percent of reserves when, oil-soluble foaming agent, which strengthens mixed gas and handles up, to be improved recovery ratio effect and disappears,
Experiment terminates；
Record time, oil production m during each cycle handles upGulp down i, gas production, core holding unit entrance, core holding unit go out
Mouth and each pressure measurement point pressure generate observation window by artificial foam oil and observe artificial foam oil generation situation, calculate and accumulate production
Oil mass, cumulative gas production and gas-oil ratio calculate the cycle recovery percent of reserves R that respectively handles up afterwardsGulp down iWith ultimate recovery RIt gulps downIt is as follows：
In the present embodiment, according to oil field development cost and oil price, handling up, to terminate recovery percent of reserves be 2.5%, the 8th round
Recovery percent of reserves RGulp down 8For 2.47%, less than handling up, to terminate recovery percent of reserves be 2.5%, therefore, after the 8th round is handled up, oil-soluble hair
Infusion reinforcing mixed gas, which handles up to have lost, improves recovery ratio effect, and experiment terminates.
Entrance, outlet and each pressure measurement point pressure during each cycle handles up are as shown in figure 9, calculate each cycle accumulation oil-producing
Amount is with recovery percent of reserves as shown in figure 3, each cycle cumulative gas production and gas and oil are such as shown in Fig. 4.Respectively handle up cycle recovery percent of reserves RGulp down i
With ultimate recovery RIt gulps downRespectively 50.21% and 60.92%.
The step 8) is as follows：
8.1. the density p of output oil) is measuredoAnd four constituent content：Asphalitine, colloid, saturation are divided, fragrance point；This implementation
In example, the density p of output oil is measuredoAnd four constituent content：Asphalitine, colloid, saturation are divided, fragrance point, as shown in table 5；
5 output oil density ρ of tableoAnd four constituent content
8.2. the quality for) weighing each block of rock core is mOil+water n, rock core is put into 50 DEG C~80 DEG C insulating boxs 1~2 day, rock
The quality for weighing each block of rock core after moisture evaporation in the heart is mOily n, therefore, each block of rock is calculated by the following formula (IV)
Heart remaining oil saturation Son, water saturation SwnWith gas saturation Sgn：
Sgn=1-Son-Swn (IV)
Wherein, ρwThe density of water, ρoRespectively oily density, n is core numbers；In embodiment, rock core is put into 70 DEG C of perseverances
2 days in incubator, the quality m of each block of rock coreOil+water nM is weighed after rock core moisture evaporationOily n, each piece of rock core water containing saturability and contain
Gas saturation is shown in Table 6, and the remaining oil saturation of each block of rock core is as shown in Figure 10；
6 embodiment of table, 11 every piece of rock core water containing saturability and gas saturation
8.3.) according to measurement output oil density, four constituent contents, remaining oil saturation distribution, Production development, evaluation oil
Dissolubility foaming agent strengthens mixed gas and handles up experiment effect.In the present embodiment, from Fig. 5~7 and Fig. 9, respectively the stage of handling up enter
Mouthful, outlet and each pressure measurement point pressure constantly change at any time, due to core holding unit length be 1m, same time lower inlet,
Outlet and each pressure measurement point pressure are different, and the presence of more pressure taps can preferably reflect the subtle change of rock core different position pressure
Change.Wherein, oil-soluble foaming agent strengthens mixed gas and handles up injection stage, and rapid increase, outlet pressure increase each pressure at any time
Acceleration is maximum, rapid to reach injection pressure 6MPa (Fig. 5).Oil-soluble foaming agent strengthens mixed gas and handles up the stewing well stage, by
In the dissolving of mixed gas, each pressure measurement point pressure tends to balance (Fig. 6).Oil-soluble foaming agent reinforcing mixed gas, which is handled up, produces rank
Section, each pressure constantly reduce at any time, and outlet pressure is minimum, and inlet pressure highest forms larger pressure difference, are conducive to viscous crude production
(Fig. 7).Cycle pressure changing rule of respectively handling up is similar to the 1st cycle (Fig. 9).
From the figure 3, it may be seen that 11 ultimate recovery R of embodimentIt gulps downFor 50.21%, and single natural gas is handled up ultimate recovery point
Not Wei 8.11%, embodiment 11 is handled up ultimate recovery RIt gulps downThat single natural gas handles up the 6.19 of experiment, recovery ratio increase it is notable,
And the cycle recovery percent of reserves R that respectively handles upGulp down i(table 7) and cumulative oil production apparent (Fig. 3) are handled up experiment higher than single natural gas.In addition,
As shown in Figure 4,11 each cycle gas-oil ratio of embodiment is handled up experiment significantly lower than single natural gas, shows production phase gas output
Speed is substantially reduced.As shown in Figure 10, each rock core remaining oil saturation is gulped down significantly lower than single natural gas in embodiment 11, is more connect
Nearly outlet, remaining oil saturation is lower, can significantly increase so as to prove that oil-soluble foaming agent strengthens mixed gas experiment of handling up
Add oil production, improve rock core ultimate recovery.
Table 7 is respectively handled up cycle recovery percent of reserves RGulp down i
As shown in Table 5, compared with single natural gas handles up experiment, 11 viscous crude density of embodiment, asphalitine and gum level
Lower, viscous crude mobility can be remarkably reinforced by showing that oil-soluble foaming agent reinforcing mixed gas is handled up, and improved viscous crude quality, be convenient for
Subsequent viscous crude transport and processing.
As shown in Figure 8, production phase of handling up the 1st cycle of embodiment 11 can generate apparent manually foam oil phenomenon, card
Understand that oil-soluble foaming agent combination mixed gas generates artificial foam oil and reduces the validity of the gas speed of response.
In summary, compared with single natural gas handles up experiment, embodiment 11 can significantly improve recovery of core, increase
Oil production, reducing the gas speed of response and remaining oil saturation, development effectiveness significantly improves, and reason is that mixed gas can
To improve output oil quality and mobility, and artificial foam oil phenomenon can be formed under the action of oil-soluble foaming agent.
Embodiment 12,
Experiment equipment is identical with embodiment 11 in this example, application process difference lies in：
Rock core quantity is 8 pieces in the step 1), the quality m of every block of rock coreRock n, length and volume V be shown in Table 8.
Each rock core base data table in 8 embodiment 12 of table
| Core numbers n | Length (cm) | mRock n(g) | Volume V (cm3) |
| 1 | 11.97 | 77.28 | 55.05 |
| 2 | 11.78 | 75.66 | 54.18 |
| 3 | 12.28 | 78.69 | 56.48 |
| 4 | 11.89 | 76.36 | 54.71 |
| 5 | 11.83 | 75.36 | 54.42 |
| 6 | 12.84 | 82.69 | 59.05 |
| 7 | 12.43 | 80.36 | 57.17 |
| 8 | 12.43 | 79.64 | 57.18 |
Natural gas and propane mixture body composition are 72 in the step 2):28；
Gained rock core mean permeability, average pore φ, saturation work oil quality are measured in the step 3) and is averagely contained
Oily saturation degree is shown in Table 9, and it is 3.18MPa to reduce rock core pressure to target reservoir pressure in core holding unit by back-pressure valve：
Rock core physical parameter table in 9 embodiment 12 of table
| Mean permeability (μm3) | Average pore φ (%) | Saturation work oil quality mIt is former(g) | Average oil saturation (%) |
| 33.70 | 40.55 | 159 | 87.44 |
In the step 4), oil-soluble foaming agent solution injection pressure is 3.75MPa, higher than rock core average pressure
0.57MPa.Mixed gas injection pressure is 6MPa, injected gas volume 1800cm3, record time, core holding unit entrance, rock core
Clamper exports and each pressure measurement point pressure is as shown in figure 12.
In the step 5), 34 minutes when the stewing well time is 19 small, record time, core holding unit entrance, rock core clamping
Device exports and each pressure measurement point pressure is as shown in 13 figures.
In the step 6), rock core pressure in the core holding unit is reduced with the pressure drop rate of 3MPa/h, works as pressure drop
During to 1MPa, heart clamp holder outlet is closed, the production phase terminates.Record time, oil production (mGulp down 1) and gas production such as 10 institute of table
Show.Core holding unit entrance, outlet and pressure measurement point pressure are as shown in figure 14.Visual window observer is generated by artificial foam oil
Work foam oil generation situation is as shown in Figure 15.Calculate period 1 cumulative oil production and recovery percent of reserves R1As shown in figure 3, calculate the
One handles up cycle cumulative gas production and gas and oil such as shown in Fig. 4.First handles up cycle recovery percent of reserves R1For 11.18%.
12 period 1 of 10 embodiment of table recovers the oil the time, oil production mGulp down 1, gas production
| Experimental period (min) | Oil production mGulp down 1(g) | Gas production (cm3) |
| 0 | 0.00 | 0 |
| 6 | 1.54 | 40 |
| 12 | 0.58 | 96 |
| 18 | 0.34 | 97 |
| 24 | 0.16 | 111 |
| 30 | 0.26 | 148 |
| 36 | 0.14 | 140 |
| 42 | 0.33 | 150 |
| 48 | 2.36 | 118 |
| 54 | 2.61 | 165 |
| 60 | 1.49 | 152 |
| 66 | 1.81 | 190 |
| 72 | 2.42 | 215 |
| 78 | 0.66 | 160 |
| 84 | 1.08 | 215 |
| 90 | 2.00 | 205 |
In the step 7), according to oil field development cost and oil price, end recovery percent of reserves of handling up is 2.5%, the 5th round
Recovery percent of reserves RGulp down 5For 2.33%, less than handling up, to terminate recovery percent of reserves be 2.5%, therefore, after the 5th round is handled up, oil-soluble
Foaming agent reinforcing mixed gas, which handles up to have lost, improves recovery ratio effect, and experiment terminates.
Entrance, outlet and each pressure measurement point pressure are as shown in figure 16 during each cycle handles up, and calculate each cycle accumulation production
Oil mass and recovery percent of reserves are as shown in figure 3, each cycle cumulative gas production and gas and oil such as shown in Fig. 4.It respectively handles up cycle recovery percent of reserves
RGulp down iIt is shown in Table 7, experiment ultimate recovery RIt gulps downFor 29.91%.
In the step 8), the density p of output oil is measuredoAnd four constituent contents (asphalitine, colloid, saturation point, fragrance
Point) as shown in table 5.Rock core is put into 70 DEG C of insulating boxs 2 days, the quality m of each block of rock coreOil+water nIt is weighed after rock core moisture evaporation
mOily n, each piece of rock core water containing saturability and gas saturation be shown in Table 11, remaining oil saturation such as Figure 10 of each block of rock core
It is shown.
11 embodiment of table, 12 every piece of rock core water containing saturability and gas saturation
From Figure 12-Figure 16, oil-soluble foaming agent strengthens mixed gas and handles up injection stage, and each pressure is quick at any time
Rise, outlet pressure is increased speed maximum, rapid to reach injection pressure 6MPa (Figure 12).Oil-soluble foaming agent strengthens mixed gas
It handles up the stewing well stage, due to the dissolving of mixed gas, each pressure measurement point pressure tends to balance (Figure 13).Oil-soluble foaming agent is strengthened mixed
It closes gas to handle up the production phase, each pressure constantly reduces at any time, and outlet pressure is minimum, and inlet pressure highest forms larger pressure
Difference is conducive to viscous crude production (Figure 14).Cycle pressure changing rule of respectively handling up is similar to the 1st cycle (Figure 16).
From the figure 3, it may be seen that 12 ultimate recovery R of embodimentIt gulps downIt is that single natural gas is handled up 3.69 times of experiment for 29.91%,
Handle up experiment compared to respectively handling up cycle recovery percent of reserves and each cycle cumulative oil production dramatically increases with single natural gas, gas-oil ratio with
Remaining oil saturation is substantially reduced (table 7, Fig. 3, Fig. 4 and Figure 10), can equally enhance viscous crude mobility, improves viscous crude quality
(table 5) generates apparent manually foam oil phenomenon (Figure 15), it follows that 12 development effectiveness of embodiment is better than single natural gas
It handles up, the complicated heavy oil development effect of improvement can equally be played by changing oil-soluble foaming agent and strengthening mixed gas middle gas composition of handling up
The purpose of fruit.
But compared with embodiment 11, embodiment 12 is respectively handled up cycle recovery percent of reserves RGulp down i(table 7), experiment ultimate recovery
RIt gulps down(Fig. 3), each cycle cumulative oil production (Fig. 3), remaining oil saturation (Figure 10) are relatively low, and gas-oil ratio (Fig. 4) is higher, output is oily close
Degree, asphalitine and gum level are higher (table 5), artificial foam oil phenomenon unobvious (Figure 15), therefore, 12 development effectiveness of embodiment
It is worse than embodiment 11.It is optimal composition to analyze natural gas and propane mixture body composition in reason embodiment 11, reservoir temperature and
Pressure spot is injected close to phasor dew point line (Fig. 1), and mixed gas keeps gas phase state in rock core, the viscous crude with maximum is molten
Solve viscosity reduction ability.And in embodiment 12, in mixed gas, propane gas content is relatively low, and viscous crude dissolving viscosity reduction ability is poor.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, the change or replacement that can be readily occurred in,
It should be covered by the protection scope of the present invention.
Claims (10)
- A kind of experimental provision 1. complexity heavy crude reservoir oil-soluble foaming agent reinforcing mixed gas is handled up, which is characterized in that the experiment Device includes：Core holding unit is connected in parallel to stratum water container, oil vessel living, described in the core holding unit entrance Core holding unit outlet is connected in parallel to oil-soluble foaming agent container and mixed gas container；In core holding unit outlet also It is connected with artificial foam oil generation observation window, back-pressure valve and gas-liquid separation device in turn.
- The experiment dress 2. a kind of complicated heavy crude reservoir oil-soluble foaming agent reinforcing mixed gas according to claim 1 is handled up It puts, which is characterized in that the gas-liquid separation device includes：Separator, high Accuracy Electronic Balance, gas measurement system and vacuum Pump；Preferably, the core holding unit is interior pressure-measuring type core holding unit；Preferably, the pressure tap of the core holding unit point It is distributed on core holding unit rock core rubber sleeve；Preferably, the length of the core holding unit is 1m~2m, and internal diameter is 0.025m~0.075m；Preferably, the artificial foam oil generates two pieces that observation window includes visual window ectosome, set in the visual window body Glass is thickeied, the flow channel set among the thickening glass is provided with visual window in one end of the flow channel and enters Mouthful, the other end of the flow channel is provided with visual window outlet, the visual window that the visual window ectosome is set by hollow out It is connected with the thickening glass；Preferably, the visual window ectosome is fixedly connected by bolt and bolt hole with thickening glass, it is preferred that described visual Outside window decompression gasket is provided between body and thickening glass；Preferably, it is also associated with nitrogen cylinder in the back-pressure valve；Preferably, the first constant speed and constant pressure pump of driving oil vessel living and stratum water container is further included；Oil-soluble foaming agent is driven to hold Second constant speed and constant pressure of device and mixed gas container pumps；Preferably, the outside of the core holding unit and artificial foam oil generation observation window is provided with insulating box；Preferably, further include to monitor core holding unit import, the computer of the corresponding parameter in outlet, the corresponding parameter includes rock Pressure measurement point pressure, inlet pressure, outlet pressure and production fluid weight in heart clamp holder.
- The experiment dress 3. a kind of complicated heavy crude reservoir oil-soluble foaming agent reinforcing mixed gas according to claim 1 is handled up Put, which is characterized in that the core holding unit include ectosome, be respectively arranged in the both sides of the ectosome the first rock core plug and Second rock core plug is provided with the first ectosome plug, in the second rock core plug periphery in the first rock core plug periphery It is provided with the second ectosome plug；Rock core rubber sleeve is axially provided in the ectosome, is set respectively on the rock core rubber sleeve Pressure tap and pressure measurement pipeline are equipped with, inlet and outlet are additionally provided on the ectosome；Internal bottom is axial successively outside Supporting rod and supporting bracket are provided with, the rock core rubber sleeve periphery is provided with confining pressure chamber；It is respectively in the both sides of the ectosome Core holding unit entrance and core holding unit outlet.
- The experiment dress 4. a kind of complicated heavy crude reservoir oil-soluble foaming agent reinforcing mixed gas according to claim 1 is handled up Put, which is characterized in that the gas measurement system includes sink, and supporting rack is provided on the sink, in the sink and The first graduated cylinder and the second graduated cylinder are respectively arranged between supporting rack, the control of the first feed liquor is respectively arranged on support frame as described above Valve, the first emptying control valve, the first air intake control valve, the second air intake control valve, the second emptying control valve and the control of the second feed liquor Valve；It is described second emptying control valve is connected by the second threeway, the second liquid inlet control valve with second graduated cylinder, second outlet and The second threeway connection, second air intake control valve are connected with second graduated cylinder；The first emptying control valve passes through First threeway, the first liquid inlet control valve are connected with first graduated cylinder, and first outlet is connected with first threeway, and described first Air intake control valve is connected with first graduated cylinder.
- The experiment dress 5. the complicated heavy crude reservoir oil-soluble foaming agent reinforcing mixed gas as described in claim 1-4 any one is handled up The application process put, which is characterized in that it is as follows that the application process includes step：1) polylith rock core is sequentially loaded into the core holding unit, simulates actual oil reservoir；2) injection fluid is prepared, including oil living, water flooding, mixed gas, oil-soluble foaming agent solution；3) the core holding unit entrance is opened, by rock core saturation water flooding and oil living, the average pore of measurement polylith rock core φ and mean permeability calculate saturation work oil quality mIt is formerIt is averaged initial oil saturation with rock core, closes open the rock afterwards Heart clamp holder entrance opens core holding unit outlet, passes through rock core pressure in back-pressure valve reduction core holding unit to target reservoir Pressure；4) simulate oil-soluble foaming agent and strengthen mixed gas and handle up injection stage：Core holding unit outlet is opened, is clamped from rock core Device outlet injection oil-soluble foaming agent and mixed gas；5) oil-soluble foaming agent reinforcing mixed gas is simulated to handle up the stewing well stage：Close core holding unit outlet；6) oil-soluble foaming agent reinforcing mixed gas is simulated to handle up the production phase：The core holding unit outlet is opened, to described Viscous crude carries out decompression exploitation in core holding unit, and the mixed gas being precipitated from viscous crude is disperseed under the action of oil-soluble foaming agent Artificial foam oil is formed in viscous crude；7) step 4)~step 6) is repeated, carries out multicycle oil-soluble foaming agent and strengthen mixed gas handling up process, it is molten to calculate oil Property foaming agent strengthen mixed gas and handle up the cycle recovery percent of reserves R that respectively handles upGulp down iWith ultimate recovery RIt gulps down；8) rock core, measurement output oil density, four constituent contents are observed：Asphalitine, colloid, fragrance point, cycloalkane, calculate rock core Remaining oil saturation, water saturation and gas saturation strengthen mixed gas for evaluating oil-soluble foaming agent and handle up experiment Effect.
- The application side of experimental provision 6. complexity heavy crude reservoir oil-soluble foaming agent reinforcing mixed gas as claimed in claim 5 is handled up Method, which is characterized in that in the step 1), the specific method of the actual oil reservoir of simulation is as follows：1.1.) length of the core holding unit is 1m~2m, and internal diameter is 0.025m~0.075m；1.2.) sand pack quantity is 8~10 pieces in the core holding unit, and rock core measures every piece before being packed into core holding unit The quality m of rock coreRock n, length, calculate every piece of rock core volume V；1.3.) multiple pressure taps are set in the core holding unit；1.4.) the core holding unit outlet is connected with artificial foam oil generation visual window, for observe and evaluate reservoir temperature With artificial foam oil generation situation under pressure；1.5. confining pressure) is applied to rock core using the core holding unit, for simulating influence of the overlying formation pressure to rock core.
- The application side of experimental provision 7. complexity heavy crude reservoir oil-soluble foaming agent reinforcing mixed gas as claimed in claim 5 is handled up Method, which is characterized in that in the step 2), prepare injection is with oil living, mixed gas, the method for oil-soluble foaming agent solution：2.1. oil living) is configured at a temperature of in reservoir pressure, for simulating the crude oil in actual oil reservoir, and is directed into oily hold of living Device；2.2. different composition propane and natural oxygen mixture phasor) are calculated, in the case where pressure is injected in experiment, dew point line is selected to correspond to Temperature is less than a phasor within 5 DEG C of reservoir temperature；Propane and natural oxygen mixture composition corresponding to the phasor are should Optimal propane and natural oxygen mixture composition at the temperature of oil reservoir and injection pressure；Propane and natural gas mixing under the composition Gas is ensured to be gas phase state, and close to dew point line, is dissolved in viscous crude with stronger viscosity reduction ability, afterwards, according to the propane and Natural gas composition configuration mixed gas；2.3.) oil-soluble foaming agent be non-ionic fluorinated blowing agent, oil-soluble foaming agent mass concentration for 0.01wt%~ 0.5wt%, oil-soluble foaming agent mass concentration are calculated by following formula；In public formula (I), mBubbleFor oil-soluble foaming agent quality.
- The application side of experimental provision 8. complexity heavy crude reservoir oil-soluble foaming agent reinforcing mixed gas as claimed in claim 7 is handled up Method, which is characterized in that the step 2.2.) in, the process for configuring mixed gas is as follows：Hold at atmosheric pressure to mixed gas Injection propane gas in device, until on mixed gas container pressure to propane dew-point pressure, makes propane liquefy；According to optimization institute Mixed gas composition injection natural gas is obtained, and adjusts mixed gas container volume so that mixed gas container pressure reaches experiment and needs The injection pressure wanted；Preferably, the step 2.3.) in, the oil-soluble foaming agent is dissolved in formation oil-soluble foaming agent solution in kerosene.
- The application side of experimental provision 9. complexity heavy crude reservoir oil-soluble foaming agent reinforcing mixed gas as claimed in claim 5 is handled up Method, which is characterized in that the step 4) simulation oil-soluble foaming agent strengthen mixed gas handle up injection stage the step of it is as follows：4.1. core holding unit outlet) is opened, is injected oil-soluble foaming agent solution with certain pressure, injection pressure is higher than rock core 0.5~1MPa of average pressure stops when solution all injects, and closes core holding unit outlet；4.2. core holding unit outlet) is opened, injects mixed gas, injection pressure is more than 5MPa, until core holding unit exports Pressure is equal to injection pressure；Time, core holding unit entrance, outlet and each pressure measurement point pressure are recorded in the above process；According to mixed It closes the equation of gas state and calculates the injection gaseous mixture scale of construction；Preferably, in the step 5) simulation oil-soluble foaming agent strengthen mixed gas handle up the stewing well stage method it is as follows：The stewing well time for 12-48 it is small when, time, core holding unit entrance, core holding unit outlet and each are recorded during stewing well Pressure measurement point pressure；When the pressure changes over time smaller, show that mixed gas is dissolved in the speed reduction of viscous crude, be further continued for stewing well shadow The production time is rung, therefore, the stewing well stage terminates, and closes core holding unit outlet；Preferably, the step 6) simulation oil-soluble foaming agent strengthen mixed gas handle up the production phase method it is as follows：Core holding unit outlet is opened, rock core pressure in the core holding unit is reduced with the pressure drop rate of 2-4MPa/h, in order to Air is avoided to enter oil reservoir, and ensures that follow-up phase has higher pressure, when pressure is down to 1~2MPa, closes rock core folder Holder exports, and the production phase terminates；Time, oil production m are recorded in the above processGulp down 1, gas production, core holding unit entrance, core holding unit outlet and pressure measurement Point pressure, and pass through high-definition camera and the artificial foam oil generation situation of artificial foam oil generation visual window observation；Cumulative oil production, cumulative gas production and gas-oil ratio are calculated, and passes through the following formula (II) and calculates first and handle up cycle extraction Degree RGulp down 1：
- The application of experimental provision 10. complexity heavy crude reservoir oil-soluble foaming agent reinforcing mixed gas as claimed in claim 5 is handled up Method, which is characterized in that in the step 7), repeat step 4)-step 6), carry out 5~10 round oil-soluble foaming agents and strengthen Mixed gas is handled up process；According to oil field development cost and oil price, handle up and terminate recovery percent of reserves between 1%~5%, the recovery percent of reserves of i-th of round RGulp down iLess than handle up terminate recovery percent of reserves when, oil-soluble foaming agent, which strengthens mixed gas and handles up, to be improved recovery ratio effect and disappears, experiment Terminate；Record time, oil production m during each cycle handles upGulp down i, gas production, core holding unit entrance, core holding unit outlet with And each pressure measurement point pressure, observation window generated by artificial foam oil observe artificial foam oil and generate situation, calculate cumulative oil production, Cumulative gas production and gas-oil ratio calculate the cycle recovery percent of reserves R that respectively handles up afterwardsGulp down iWith ultimate recovery RIt gulps downIt is as follows：Preferably, the step 8) is as follows：8.1. the density p of output oil) is measuredoAnd four constituent content：Asphalitine, colloid, saturation are divided, fragrance point；8.2. the quality for) weighing each block of rock core is mOil+water n, rock core is put into 50 DEG C~80 DEG C insulating boxs 1~2 day, in rock core The quality that each block of rock core is weighed after moisture evaporation is mOily n, therefore, each block of rock core is calculated by the following formula (IV) and is remained Excess oil saturation degree Son, water saturation SwnWith gas saturation Sgn：Sgn=1-Son-Swn(IV)Wherein, ρwThe density of water, ρoRespectively oily density, n is core numbers；8.3.) according to measurement output oil density, four constituent contents, remaining oil saturation distribution, Production development, evaluate oil-soluble Foaming agent strengthens mixed gas and handles up experiment effect.
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