CN106917615B - The recovery method and device of heavy crude reservoir - Google Patents
The recovery method and device of heavy crude reservoir Download PDFInfo
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- CN106917615B CN106917615B CN201510998871.1A CN201510998871A CN106917615B CN 106917615 B CN106917615 B CN 106917615B CN 201510998871 A CN201510998871 A CN 201510998871A CN 106917615 B CN106917615 B CN 106917615B
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- 238000000034 method Methods 0.000 title claims abstract description 46
- 238000011084 recovery Methods 0.000 title claims abstract description 46
- 238000004519 manufacturing process Methods 0.000 claims abstract description 114
- 239000000295 fuel oil Substances 0.000 claims abstract description 82
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 75
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 238000002347 injection Methods 0.000 claims abstract description 20
- 239000007924 injection Substances 0.000 claims abstract description 20
- 238000002525 ultrasonication Methods 0.000 claims abstract description 10
- 239000003921 oil Substances 0.000 claims description 94
- 238000010793 Steam injection (oil industry) Methods 0.000 claims description 41
- 239000010779 crude oil Substances 0.000 claims description 22
- 239000012530 fluid Substances 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 13
- 230000035699 permeability Effects 0.000 claims description 13
- 239000011435 rock Substances 0.000 claims description 11
- 238000012544 monitoring process Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 9
- 230000009471 action Effects 0.000 claims description 8
- 239000011148 porous material Substances 0.000 claims description 7
- 238000010795 Steam Flooding Methods 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 5
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 230000000644 propagated effect Effects 0.000 claims description 5
- 239000004927 clay Substances 0.000 claims description 4
- 230000005484 gravity Effects 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 229920006395 saturated elastomer Polymers 0.000 claims description 4
- 238000002604 ultrasonography Methods 0.000 claims 1
- 238000011161 development Methods 0.000 abstract description 19
- 230000000694 effects Effects 0.000 description 15
- 239000012071 phase Substances 0.000 description 12
- 238000013461 design Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 6
- 230000007246 mechanism Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 238000004088 simulation Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000010025 steaming Methods 0.000 description 2
- 238000010794 Cyclic Steam Stimulation Methods 0.000 description 1
- 238000010796 Steam-assisted gravity drainage Methods 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
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- 239000007791 liquid phase Substances 0.000 description 1
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- 230000010534 mechanism of action Effects 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B28/00—Vibration generating arrangements for boreholes or wells, e.g. for stimulating production
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- Mining & Mineral Resources (AREA)
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- Environmental & Geological Engineering (AREA)
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- General Life Sciences & Earth Sciences (AREA)
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Abstract
The invention discloses a kind of recovery method of heavy crude reservoir and devices, this method comprises: opening supersonic generator, the formation at target locations of production of heavy oil reservoir is waited for using the ultrasonication that supersonic generator generates；Supersonic generator is arranged in the ultrasonic operation well to production of heavy oil reservoir；The steam that preset flow is injected into ultrasonic operation well, heats the formation at target locations to production of heavy oil reservoir；Ultrasonic operation well is closed, until injection steam is converted to water, ultrasonic operation well is opened, treats production of heavy oil reservoir and exploited.Above-mentioned technical proposal improves the development degree, heat utilization rate and development efficiency of heavy crude reservoir, improves the recovery ratio and development effectiveness of heavy crude reservoir.
Description
Technical field
The present invention relates to oil reservoir production technique field, in particular to the recovery method and device of a kind of heavy crude reservoir.
Background technique
Heavy crude reservoir refers to oil reservoir of the degassed crude viscosity greater than 100mPa.s under reservoir temperature, at present country's viscous crude oil
Thermal recovery technology is widely applied in the exploitation of field, oil production method includes: steam assisted gravity drainage, steam soak, the technologies such as steam drive.
Main force development technique of the cyclic steam injection tech as current Chinese viscous crude field, has had application in more than 30 years to go through
History.Cut-off 723.4 ten thousand tons of yearly rate-oil production, accounted for viscous crude annual output to 2014,8.1 hundred million tons of steam soak mining-employed reserves
66.8%.Steam soak is a kind of mode of operation for relying primarily on natural energy exploitation, is a kind of primary oil recovery technology.Steam gulps down
It is stronger to spit adaptability, needs small investment, economic risk is small, can apply in the oil reservoir of various complex situations.Disadvantage is
It is a kind of production technique exploited with stratum energy failure as dominant mechanism, and production decline is fast.And it to employ range small, adopt
Degree is relatively low out.Steam soak heating radius generally only has 10~30m, and maximum is no more than 50m, and recovery percent of reserves is generally 15~
20%.
By it is above-mentioned it is found that existing heavy crude reservoir recovery method, production efficiency and recovery ratio are low.
Summary of the invention
The embodiment of the invention provides a kind of recovery method of heavy crude reservoir, to improve heavy crude reservoir development efficiency and
Recovery ratio, this method comprises:
Supersonic generator is opened, the target of production of heavy oil reservoir is waited for using the ultrasonication that supersonic generator generates
Stratum；Supersonic generator is arranged in the ultrasonic operation well to production of heavy oil reservoir；
The steam that preset flow is injected into ultrasonic operation well, heats the formation at target locations to production of heavy oil reservoir；
Ultrasonic operation well is closed, until injection steam is converted to water, ultrasonic operation well is opened, treats heavy crude producing
Oil reservoir is exploited.
The embodiment of the invention also provides a kind of quarrying apparatus of heavy crude reservoir, to improve the development efficiency of heavy crude reservoir
And recovery ratio, the device include:
Supersonic generator is arranged in the ultrasonic operation well to production of heavy oil reservoir, for generating ultrasonication
Stratum to production of heavy oil reservoir target；
Steam injection string is heated for injecting the steam of preset flow into ultrasonic operation well to production of heavy oil reservoir
Formation at target locations；
Flow string, until injection steam is converted to water, opens ultrasonic operation for closing ultrasonic operation well
Well is treated production of heavy oil reservoir and is exploited.
Compared with the mining method of existing heavy crude reservoir, technical solution provided by the invention, firstly, being sent out using ultrasonic wave
The ultrasonication that raw device generates waits for the formation at target locations of production of heavy oil reservoir, then, default stream is injected into ultrasonic operation well
The steam of amount heats the formation at target locations to production of heavy oil reservoir, finally, ultrasonic operation well is closed, until injection steam turns
It is melted into water, ultrasonic operation well is opened, treats production of heavy oil reservoir and exploited, ultrasonic technology is introduced into thickened oil recovery skill
In art, using the ultrasonic equipment being placed in pit shaft, by reducing crude oil viscosity, the mechanism such as stratum anatonosis increase crude oil on stratum
In mobility effectively improve the thermal efficiency and gas oil ratio of steam injection development process to assist steam injection recovery process, reach and change
The purpose of kind development effectiveness and economical and effective exploitation heavy crude reservoir, combines the volume increase of ultrasonic wave auxiliary and Thermal Recovery For Viscous Oil By Steam
Double dominant effectively improves the mobility of oil deposit deep part crude oil, improves individual well group control reservoir area and producing degree of reservoir, and
Improve heat utilization rate, the final recovery ratio for improving viscous crude.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, not
Constitute limitation of the invention.In the accompanying drawings:
Fig. 1 is the flow diagram of the recovery method of heavy crude reservoir in the embodiment of the present invention；
Fig. 2 is the structural schematic diagram of the quarrying apparatus of heavy crude reservoir in the embodiment of the present invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, right below with reference to embodiment and attached drawing
The present invention is described in further details.Here, exemplary embodiment and its explanation of the invention is used to explain the present invention, but simultaneously
It is not as a limitation of the invention.
Inventor's discovery: the thermal efficiency in order to improve steam injection process, foreign countries start to grind in the latter stage in the 1960s
Study carefully during ultrasonic applications to oilfield stimulation, but its application is only confined in wellbore oil viscosity reduction, near wellbore stratum
De-plugging, pit shaft wax control, the modification measures of the pit shafts such as pit shaft scale removal and near wellbore stratum.And there is no using ultrasonic wave as one kind
Oil reservoir development technical application is during oil reservoir development.
In view of above-mentioned technical problem, ultrasonic technology is introduced into thickened oil recovery skill by largely studying by inventor
Art, using the large power supersonic wave device being placed in pit shaft, by reducing crude oil viscosity, the mechanism such as stratum anatonosis increase crude oil and exist
Mobility in stratum effectively improves the thermal efficiency and gas oil ratio of steam injection development process, reaches to assist steam injection recovery process
To suggestions for improvement and economy, the purpose of effective exploitation heavy crude reservoir.
It describes in detail below to the method for ultrasonic wave auxiliary Simulation on whole pay zones heavy crude reservoir of the invention.
Fig. 1 is the flow diagram of the recovery method of heavy crude reservoir in the embodiment of the present invention, as shown in Figure 1, this method packet
Include following steps:
Step 101: opening supersonic generator, wait for heavy crude producing oil using the ultrasonication that supersonic generator generates
The formation at target locations of hiding；Supersonic generator is arranged in the ultrasonic operation well to production of heavy oil reservoir；
Step 102: injecting the steam of preset flow into ultrasonic operation well, heat the target to production of heavy oil reservoir
Layer；
Step 103: ultrasonic operation well being closed, until injection steam is converted to water, ultrasonic operation well is opened, treats
Production of heavy oil reservoir is exploited.
Compared with the mining method of existing heavy crude reservoir, technical solution provided by the invention, firstly, being sent out using ultrasonic wave
The ultrasonication that raw device generates waits for the formation at target locations of production of heavy oil reservoir, then, default stream is injected into ultrasonic operation well
The steam of amount heats the formation at target locations to production of heavy oil reservoir, finally, ultrasonic operation well is closed, until injection steam turns
It is melted into water, ultrasonic operation well is opened, treats production of heavy oil reservoir and exploited, ultrasonic technology is introduced into thickened oil recovery skill
In art, using the ultrasonic equipment being placed in pit shaft, by reducing crude oil viscosity, the mechanism such as stratum anatonosis increase crude oil on stratum
In mobility effectively improve the thermal efficiency and gas oil ratio of steam injection development process to assist steam injection recovery process, reach and change
The purpose of kind development effectiveness and economical and effective exploitation heavy crude reservoir, combines the volume increase of ultrasonic wave auxiliary and Thermal Recovery For Viscous Oil By Steam
Double dominant effectively improves the mobility of oil deposit deep part crude oil, improves individual well group control reservoir area and producing degree of reservoir, and
Improve heat utilization rate, the final recovery ratio for improving viscous crude.
The effect of ultrasonic wave and mechanism are explained in detail and be described below below.
Ultrasonic wave auxiliary Simulation on whole pay zones heavy crude reservoir method provided by the invention is the spy using ultrasonic wave to heavy crude reservoir
It is set for using, hence it is evident that the characteristics of improving mobility of the crude oil in oil reservoir, combine with the steam injection process of handling up, improve entire oil reservoir
Development effectiveness.Its mechanism of action is, 1), ultrasonic wave acts on so that shear action occurs between different medium, has enough energy
When the ultrasonic wave of the certain frequency of amount is propagated in different media, different medium is in height with various amplitude, velocity and acceleration
Frequency mechanical shock generates friction and shearing in intersection, increases liquid mobility, change to make two-phase medium that relative motion occur
Kind earth formation；2), the coupling of two class longitudinal waves passes under the combination of fluid field and acoustic wavefield certain parameter in ultrasonic wave
During broadcasting, the medium for being respectively acting on liquid phase and solid phase is generated, and the two class longitudinal waves that action direction is opposite, the i.e. first kind are vertical
Wave (fast wave) and the second class longitudinal wave (slow wave), first kind longitudinal wave mainly control reservoir skeleton, and the second class longitudinal wave is mainly right
Crude oil fluid generation effect, to aggravate the relative motion of solid-liquid two-phase interface, is more advantageous to two-phase medium and isolates and falls off；3),
The acoustic characteristic impedance of ultrasonic wave rock stratum seam mechanism, oil, rock and water is different, when ultrasonic wave is on the ground of saturated oil and water
When propagating in layer, coupling can occur between the sound wave in different medium, produced in free interface or two media boundary
Sheng Xinbo, forms stress concentration phenomenon, which is known as converging effect.Other than longitudinal wave effect, shear wave will be also generated, although
Shear wave attenuation block but makes rock matrix generate trimming, increases width generation capacity.The two comprehensive function, it is smaller in Tensile Strength of Rock
Position generates new crack, increases rock permeability；4), acoustic streaming acts on, when sound field is propagated in a liquid, since medium absorbs
The momentum and energy of wave, make fluid generate aperiodicity flowing and formed.The maximum feature of acoustic streaming effect is to make reservoir fluid
Strong vortex is generated, so that the crude oil of stagnant pore flows out, while acoustic streaming causes fluid surge for removing hole surface adhesion
Clay particle it is highly effective.
In one embodiment, the steam of preset flow is injected into ultrasonic operation well, is heated to production of heavy oil reservoir
Formation at target locations, comprising:
Monitor the raising temperature to production of heavy oil reservoir formation at target locations；
According to the raising temperature to production of heavy oil reservoir formation at target locations monitored, injected into ultrasonic operation well default
The steam of flow heats the formation at target locations to production of heavy oil reservoir.
In one embodiment, the value range for increasing temperature is 20 DEG C~30 DEG C.
When it is implemented, when monitor when production of heavy oil reservoir formation at target locations temperature increase 20~30 DEG C when, start to
The quantity of steam of design is injected in oil reservoir.After ultrasonic Wave heating formation at target locations fluid, the injectability of steam is improved.Tool
Body can monitor the raising temperature to production of heavy oil reservoir formation at target locations by temperature sensor.It is largely tested by inventor
It was found that injecting preset flow into ultrasonic operation well when the value range that formation at target locations increases temperature is 20 DEG C~30 DEG C
Steam, such effect is best, improves the injectability of steam, the final recovery ratio for improving heavy crude reservoir.
The steam of above-mentioned preset flow can be 80~120t/m.
In one embodiment, ultrasonic operation well is closed, until injection steam is converted to water, opens ultrasonic operation
Well is treated production of heavy oil reservoir and is exploited, comprising:
Monitor the difference of the pressure and the reset pressure to production of heavy oil reservoir formation at target locations in ultrasonic operation well；
Ultrasonic operation well is closed, until injection steam is converted to water, the pressure in the ultrasonic operation well monitored
Power is opened ultrasonic operation well, is treated out with when the difference of the reset pressure of production of heavy oil reservoir formation at target locations is less than threshold value
Heavy crude reservoir is adopted to be exploited.
In one embodiment, the recovery method of above-mentioned heavy crude reservoir further include: pressure in ultrasonic operation well with to
The value range of the difference of the reset pressure of production of heavy oil reservoir formation at target locations is less than 2 megapascal.
When it is implemented, will be infused ultrasonic operation well closing well 5 to 10 days after steam injection is completed, as monitoring road ultrasonic wave behaviour
Make the pressure in well with when the difference of the reset pressure of production of heavy oil reservoir formation at target locations is less than 2MPa, opens ultrasonic operation
Well takes out steam injection string, and tripping in flow string starts to produce, and the flow string is preferentially in a manner of self-spray or artificial lift
It is continuous to recover the oil.It specifically, can be by the pressure in pressure sensor monitoring ultrasonic operation well and to production of heavy oil reservoir mesh
The difference for marking the reset pressure on stratum, is tested repeatedly by inventor, is found when the value range of the difference is less than 2 megapascal,
Ultrasonic operation well is opened, the effect produced is best, the final recovery ratio for improving heavy crude reservoir.
In one embodiment, the recovery method of above-mentioned heavy crude reservoir further include: adopted in continuous monitoring ultrasonic operation well
The water content of liquid out, when it is aqueous rise to 80% or more or oil production less than 1 ton/day when, stop production, carry out next week
The steam injection of phase.
When it is implemented, 80% or more is risen to when aqueous when the water content of Produced Liquid in monitoring ultrasonic operation well, or
When person's oil production is less than 1 ton/day, stop production, carry out the steam injection in next period, referring herein to next period steam injection, can
To be period of the above-mentioned steps 101 to step 103.Above-mentioned steps 101 to step 103 can be a steam injection period.
In one embodiment, the recovery method of above-mentioned heavy crude reservoir further include: all when being carried out continuously throughput operation 5 to 8
After phase, when period gas oil ratio drops to 0.2 or less, stop steam soak operation, is changed to combine progress steam drive behaviour with producing well
Make, while the formation at target locations for persistently treating production of heavy oil reservoir carries out ultrasonic wave heating operation, or in ultrasonic operation well and
Horizontal well is encrypted between producing well, with gravity drainage mode production of heavy oil reservoir.
When it is implemented, above-mentioned 5 to 8 period, each steam injection period is also possible to above-mentioned steps 101 to step 103.Upper
It states and stops steam soak operation, when being changed to combine progress steam drive operation with producing well, need for supersonic generator to be placed into
In the producing well of flooding pattern, and continue that ultrasonic wave occurs.
In one embodiment, the steam of preset flow is injected into ultrasonic operation well, is heated to production of heavy oil reservoir
Formation at target locations, comprising:
Supersonic generator is closed, the steam of preset flow is injected into ultrasonic operation well, heating is to heavy crude producing oil
The formation at target locations of hiding；
Ultrasonic operation well is closed, until injection steam is converted to water, ultrasonic operation well is opened, treats heavy crude producing
Oil reservoir is exploited, comprising:
Ultrasonic operation well is closed, until injection steam is converted to water, opens ultrasonic operation well；
Supersonic generator is opened, production of heavy oil reservoir is treated and is exploited.
When it is implemented, supersonic generator can also close during steam injection and stewing well, only open, rises in the production phase
To crude oil production is promoted, expand the effect of steam soak sphere of action.Certainly, supersonic generator is during steam injection and stewing well
Also openable, play the role of promoting steam diffusion into stratum.
In one embodiment, the steam of preset flow is injected into ultrasonic operation well, is heated to production of heavy oil reservoir
Formation at target locations, comprising:
Calculate the working time of the supersonic generator；
According to the working time of the supersonic generator and power, the steaming of preset flow is injected into ultrasonic operation well
Vapour heats the formation at target locations to production of heavy oil reservoir.
When it is implemented, injection quantity of steam number can design with the power coordinated of supersonic generator, surpassing
When sonic generator longevity of service and big power, steam injection can be suitably reduced.Such design is energy saving, reasonable.
In one embodiment, supersonic generator is opened, is waited out using the ultrasonication that supersonic generator generates
Adopt the formation at target locations of heavy crude reservoir, comprising:
Make that shear action occurs in the formation at target locations of heavy crude reservoir between different medium using ultrasonic wave, increases liquid flowing
Property, improve the structure of formation at target locations；
Using the coupling of first kind longitudinal wave and the second class longitudinal wave that ultrasonic wave generates, aggravate the phase of solid-liquid two-phase interface
To movement, accelerate isolating and falling off for the two-phase medium of formation at target locations；The first kind longitudinal wave is fast wave, and the second class longitudinal wave is slow
Wave；
It is propagated in the stratum of saturated oil and water using ultrasonic wave, increases the rock width generation capacity of formation at target locations, increased
The rock permeability of formation at target locations；
It is acted on using the acoustic streaming of ultrasonic wave, heavy crude reservoir fluid is made to generate strong vortex, the crude oil outflow of stagnant pore, benefit
Cause fluid to agitate with acoustic streaming, removes the clay particle of the pore surface adherency of formation at target locations.
In an alternative embodiment of the invention, the recovery method of heavy crude reservoir includes the following steps:
1), ultrasonic wave assists Simulation on whole pay zones Development of Viscous Crude Oil method, and suitable for meeting the oil reservoir of the following conditions: oil reservoir is deep
Degree < 2000m；Core intersection > 10m；Oil reservoir plane permeability > 500md, oil reservoir vertical permeability > 200md；Viscosity of crude >
2000mPa.s；Oil saturation > 50%；Net-gross ratio > 0.7；
2), have in heavy crude reservoir and select flooding pattern in well area of handling up, flooding pattern should include at least a note and adopt
Well group selects the centerwell of injection-production well group as ultrasonic operation well；
3), tripping in ultrasonic transducer (supersonic generator) in the wellbore, and be powered in due course, it generates at ultrasonic wave
Manage stratum；
4), the steam injection stage handles up design method according to conventional steam, injects steam to stratum according to design steam injection intensity；
5), injection carries out 5~10 day time stewing well, and the steam heat for injecting oil reservoir is made to discharge and be converted to water completely, and
Sufficiently heated act on ultrasonic wave of crude oil in oil reservoir is set to achieve the purpose that improve mobility.
6), subsequent opening well and making production, the closing well when yield is reduced to 1 ton/day or moisture content reaches 92%, start steam injection into
Enter next period, circuits sequentially；
7) 5~8 period of round of, handling up, when the period, gas oil ratio dropped to 0.2, stop steam injection throughput operation, be changed to
The areal well pattern steam of neighbouring straight well combination drives operation, or encryption horizontal well with gravity drainage mode development.
In one embodiment of this invention, oil reservoir described in step 1) meets the following conditions: oil reservoir depth < 2500m；Oil reservoir
Thickness > 10m.
In one embodiment of this invention, oil reservoir described in step 1) meets the following conditions: oil reservoir plane permeability >
500md, oil reservoir vertical permeability > 200md.
In one embodiment of this invention, oil reservoir described in step 1) meets the following conditions: viscosity of crude > 2000mPa.s.
In one embodiment of this invention, oil reservoir described in step 1) meets the following conditions: oil saturation > 50%.
In one embodiment of this invention, oil reservoir described in step 1) meets the following conditions: net-gross ratio > 0.7.
In one embodiment of this invention, flooding pattern described in step 2) meets the following conditions: injector producer distance is not more than
100m, well pattern form can be 5 points, 9 points or 7 point type well patterns.
In one embodiment of this invention, ultrasonic operation well described in step 2) meets the following conditions: hole condition is preferable, Gu
Well quality is preferable, and full well section has perforation.
In one embodiment of this invention, ultrasonic transducer described in step 3) meets can continue work under the high temperature conditions
Make, ultrasonic transducer pulse acoustical power is in 10KW or more, and produced 20~25kHz of ultrasonic frequency, operating temperature is less than 250
DEG C, operating pressure is less than 30Mpa.
In one embodiment of this invention, supersonic generator described in step 3) passes through low-loss ultrasonic wave oil increasing cable
Electric power is provided, cable length 2500m efficiency of transmission reaches 80% or more.
In one embodiment of this invention, supersonic generator described in step 3) can also close during steam injection and stewing well
It closes, is only opened in the production phase, play the role of promotion crude oil production, expand steam soak sphere of action；
In one embodiment of this invention, supersonic generator described in step 3) can also be beaten during steam injection and stewing well
It opens, plays the role of promoting steam diffusion into stratum；
In one embodiment of this invention, supersonic generator described in step 3) can be rotated with 360 ° in the wellbore, be added
The stratum of the near wellbore of hot different directions；
In one embodiment of this invention, design steam injection amount described in step 4) needs to assist with ultrasonic transducer power
Same matching design can suitably reduce steam injection in ultrasonic transducer longevity of service and big power.
In one embodiment of this invention, warm-up phase steam soak described in step 4) can be with design cycle steam injection amount mark
Standard is 80~120t/m.
In one embodiment of this invention, production system described in step 6) can be in a manner of self-spray or artificial lift
It is continuous to recover the oil.
In one embodiment of this invention, areal well pattern displacement mode described in step 7) needs to put supersonic generator
It sets in the production pit shaft of flooding pattern, and continues that ultrasonic wave occurs.
Based on the same inventive concept, a kind of quarrying apparatus of heavy crude reservoir is additionally provided in the embodiment of the present invention, it is such as following
Embodiment described in.Due to the principle and a kind of recovery method phase of heavy crude reservoir of a kind of quarrying apparatus problem of heavy crude reservoir
Seemingly, thus a kind of implementation of quarrying apparatus of heavy crude reservoir may refer to a kind of heavy crude reservoir recovery method implementation, repeat
Place repeats no more.Used below, the software and/or hardware of predetermined function may be implemented in term " unit " or " module "
Combination.Although device described in following embodiment is preferably realized with software, hardware or software and hardware
The realization of combination is also that may and be contemplated.
Fig. 2 is the structural schematic diagram of the quarrying apparatus of heavy crude reservoir in the embodiment of the present invention, as shown in Fig. 2, the device packet
It includes:
Supersonic generator 11 is arranged in the ultrasonic operation well 1 to production of heavy oil reservoir, for generating at ultrasonic wave
Manage the formation at target locations 6 to production of heavy oil reservoir；
Steam injection string 13 is heated for injecting the steam of preset flow into ultrasonic operation well 1 to production of heavy oil reservoir
Formation at target locations 6；
Flow string, until injection steam is converted to water, opens ultrasonic operation for closing ultrasonic operation well
Well is treated production of heavy oil reservoir and is exploited.
When it is implemented, supersonic generator 11 can be fixed on ultrasonic operation well by supersonic generator bracket 12
In 1, flow string is not shown in FIG. 2, when it is implemented, opening ultrasonic wave after ultrasonic operation well is closed preset time
Well 1 is operated, steam injection string 13 is taken out, tripping in flow string starts to produce.In Fig. 2,4 be steam soak sphere of action, and 5 are
The range of ultrasonic wave effect, 6 is to production of heavy oil reservoir formation at target locations.
In one embodiment, the quarrying apparatus of heavy crude reservoir further include:
Temperature sensor 14 is arranged in the ultrasonic operation well 1, for monitoring to production of heavy oil reservoir formation at target locations
6 raising temperature；
The steam injection string 13 is specifically used for according to the raising temperature to production of heavy oil reservoir formation at target locations 6 monitored,
The steam that preset flow is injected into ultrasonic operation well 1, heats the formation at target locations 6 to production of heavy oil reservoir.
In one embodiment, the quarrying apparatus of heavy crude reservoir further include:
Pressure sensor 15, be arranged in the ultrasonic operation well 1, for monitor the pressure in ultrasonic operation well with
The difference of reset pressure to production of heavy oil reservoir formation at target locations 6；
The flow string is specifically used for closing in ultrasonic operation well, until injection steam is converted to water, when monitoring
Ultrasonic operation well in pressure with when the difference of the reset pressure of production of heavy oil reservoir formation at target locations be less than threshold value when, open
Ultrasonic operation well is treated production of heavy oil reservoir and is exploited.
In one embodiment, the pulse acoustical power of the supersonic generator is at 10 kilowatts or more, the ultrasonic wave hair
The frequency range that raw device generates ultrasonic wave is 20 kHz~25 kHz, and the operating temperature of the supersonic generator is less than
250 DEG C, the operating pressure of the supersonic generator is less than 30 megapascal.
In one embodiment, the supersonic generator is that the ultrasonic wave of 360 ° of rotations in ultrasonic operation well occurs
Device.Supersonic generator can be rotated with 360 ° in the wellbore, heat the stratum of the near wellbore of different directions.
It is illustrated again with example below, in order to understanding how to implement the present invention.
Application method of the invention is illustrated by taking a certain heavy crude reservoir as an example.Oil reservoir depth 600m, crude oil is viscous under reservoir temperature
Spend 230000 centipoises, 6 thickness 55m of target oil reservoir, porosity 30%, oil saturation 75%, permeability 2000mD.
(1) flooding pattern is disposed
As shown in Fig. 2, flooding pattern is arranged in heavy crude reservoir region: the flooding pattern includes at least one injection-production well
Group, is an injection-production well group shown in Fig. 2, which includes a displacement well (ultrasonic operation well) 1 and displacement well week
Several producing wells 2 enclosed；The ultrasonic operation well 1 selected in the present embodiment answers full well section perforation, and hole condition is good.The life
Produce the adjacent well construction of handling up around the oily well of well 2.
1 tripping in supersonic generator 11 and supersonic generator bracket 12 in ultrasonic operation well, and the device is consolidated
Surely it arrives in the depth bounds of purpose of horizon 6.The supersonic generator bracket 12 can satisfy make supersonic generator 11 according to
Fixing speed rotates or is fixed on a certain angle.The supersonic generator 11 is connect by cable with ground power supply, described
Cable should meet cable length 2500m efficiency of transmission and reach 80% or more；The target oil reservoir 6 refers to when containing one in oil reservoir
When a or multiple independent layer positions, a certain independent oil reservoir or several oil reservoirs of exploitation of the embodiment of the present invention to be applied.
Tripping in temperature sensor 14 and pressure sensor 15 are distinguished in ultrasonic operation well 1, and tripping in is distinguished in producing well 2
Temperature sensor 24 and pressure sensor 25, the pressure sensor and temperature sensor are uniformly deployed in the entire of target oil reservoir
In range, to monitor the near wellbore zone pressure, temperature variation of ultrasonic operation well 1 and producing well 2.
(2) ultrasonic wave auxiliary is recovered the oil
Supersonic generator 3 is opened, the temperature of near wellbore is continuously monitored using temperature sensor 14, reservoir temperature increases
At 20~30 DEG C, the quantity of steam that steam injection string 13 injects design into oil reservoir is begun through.Purpose is through ultrasonic Wave heating
After formation fluid, the injectability of steam is improved.
After steam injection is completed, will infuse 1 closing well of ultrasonic operation well 5~10 days, the pressure measured to pressure sensor 15 with
When original formation pressure difference is less than 2MPa, ultrasonic operation well 1 is opened, takes out steam injection string 13, tripping in flow string starts
Production.The flow string is preferentially continuously recovered the oil in a manner of self-spray or artificial lift.
The Produced Liquid water content of continuous monitoring ultrasonic operation well 1, when it is aqueous rise to 80% or more or oil production it is small
When 1 ton/day.Stop production, take out flow string, tripping in steam injection string 13 starts a new round time steam injection.
After being carried out continuously 5~8 period of throughput operation, when period gas oil ratio drops to 0.2 or less, stop steam soak behaviour
Make, is changed to combine progress steam drive operation with producing well 2, while persistently carrying out ultrasonic wave heating operation to target oil reservoir 6.Or
Horizontal well is encrypted between ultrasonic operation well 1 and producing well 2, with gravity drainage mode development.
The production of ultrasonic wave auxiliary soaking carried out to target oil reservoir and conventional steam is handled up the Contrast on effect of production:
1) when target oil reservoir handles up method production with conventional steam, average period gas oil ratio 0.5 or so, maximum daily output
Oil only has 20m3/ d, ultimate recovery 15% or so, near wellbore employ range in 25m or so；
2) when target oil reservoir considers that ultrasonic wave auxiliary steam is handled up, average period, gas oil ratio was increased to 0.63, maximum day
Oil-producing 31m3/ d, ultimate recovery 21% of handling up.It handles up in view of ultrasonic wave auxiliary steam and improves the individual well daily output, therefore can
To think that ultrasonic wave auxiliary steam technical operation of handling up extends time of steam soak, the production effect of practical operation is better than
The result of simulation.
The invention belongs to field of oil development, in particular to a kind of novel heavy crude heat extraction oil production method, in conjunction with ultrasonic wave
The double dominant of auxiliary volume increase and Thermal Recovery For Viscous Oil By Steam, effectively improves the mobility of oil deposit deep part crude oil, improves the control of individual well group
Reservoir area processed and producing degree of reservoir, and heat utilization rate is improved, the final recovery ratio for improving viscous crude.
Ultrasonic wave auxiliary Simulation on whole pay zones heavy crude reservoir method of the invention and existing horizontal wells heavy oil heat production oil reservoir
Method, which is compared, has larger improvement: ultrasonic wave effect can improve reservoir properties, promote seepage flow of the steam into oil reservoir, effectively expand
Big heated perimeter；Dual viscosity reduction effect of the crude oil by heating power and ultrasonic wave force, mobility are improved；The present invention for
Existing in oil reservoir has preferable transformation effect every the case where interlayer, and ultrasonic wave can be transformed interlayer and reservoir simultaneously, promote
The improvement of seepage channel effectively expands exploitation and employs range.On the basis of cyclic steam stimulation, the present invention can continue to improve
Recovery ratio 10% or so, in addition the recovery percent of reserves of steam soak, recovery ratio of totally handling up can achieve 30% or so.
To sum up, the embodiment of the present invention is that a kind of new type ultrasonic auxiliary steam is handled up and develops heavy crude reservoir method, and
Conventional steam method of handling up is compared, and present invention improves the production effects of steam soak, improve steam utilization, increase steaming
What vapour was handled up employs range, improves the recovery ratio of handling up of oil reservoir.In extreme circumstances, it can be fed only with a small amount of steam,
The method for relying only on ultrasonic wave auxiliary carries out promotion production, and therefore, the householder method that this method can be used as steam soak is to use,
A kind of independent development scheme be can also be used as developing heavy crude reservoir.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the embodiment of the present invention can have various modifications and variations.All within the spirits and principles of the present invention, made
Any modification, equivalent substitution, improvement and etc. should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of recovery method of heavy crude reservoir characterized by comprising
Supersonic generator is opened, with waiting for the target of production of heavy oil reservoir using the ultrasonication that supersonic generator generates
Layer；The supersonic generator is arranged in the ultrasonic operation well to production of heavy oil reservoir；
The steam that preset flow is injected into ultrasonic operation well, heats the formation at target locations to production of heavy oil reservoir；
Ultrasonic operation well is closed, until injection steam is converted to water, ultrasonic operation well is opened, treats production of heavy oil reservoir
It is exploited；
The depth to production of heavy oil reservoir is less than 2000m, and core intersection is greater than 10m, and oil reservoir plane permeability is greater than
500md, oil reservoir vertical permeability are greater than 200md, and viscosity of crude is greater than 2000mPa.s, and oil saturation is greater than 50%, net-gross ratio
Greater than 0.7；
The steam that preset flow is injected into ultrasonic operation well, heats the formation at target locations to production of heavy oil reservoir, comprising:
Monitor the raising temperature to production of heavy oil reservoir formation at target locations；
According to the raising temperature to production of heavy oil reservoir formation at target locations monitored, preset flow is injected into ultrasonic operation well
Steam, heat formation at target locations to production of heavy oil reservoir；The value range for increasing temperature is 20 DEG C~30 DEG C；
Ultrasonic operation well is closed, until injection steam is converted to water, ultrasonic operation well is opened, treats production of heavy oil reservoir
It is exploited, comprising:
Monitor the difference of the pressure and the reset pressure to production of heavy oil reservoir formation at target locations in ultrasonic operation well；
Ultrasonic operation well is closed, until injection steam be converted to water, when in the ultrasonic operation well monitored pressure with
When the difference of the reset pressure of production of heavy oil reservoir formation at target locations is less than threshold value, ultrasonic operation well is opened, it is thick to treat exploitation
Oil reservoir is exploited；The difference of pressure and the reset pressure to production of heavy oil reservoir formation at target locations in the ultrasonic operation well
The value range of value is less than 2 megapascal；
Supersonic generator is opened, with waiting for the target of production of heavy oil reservoir using the ultrasonication that supersonic generator generates
Layer, comprising:
Make that shear action occurs in the formation at target locations of heavy crude reservoir between different medium using ultrasonic wave, increases liquid fluidity, change
The structure of kind formation at target locations；
Utilize the coupling of first kind longitudinal wave and the second class longitudinal wave that ultrasonic wave generates, the opposite fortune of aggravation solid-liquid two-phase interface
It is dynamic, accelerate isolating and falling off for the two-phase medium of formation at target locations；The first kind longitudinal wave is fast wave, and the second class longitudinal wave is slow wave；
It is propagated in the stratum of saturated oil and water using ultrasonic wave, increases the rock width generation capacity of formation at target locations, increase target
The rock permeability on stratum；
It is acted on using the acoustic streaming of ultrasonic wave, heavy crude reservoir fluid is made to generate strong vortex, the crude oil outflow of stagnant pore utilizes sound
Stream causes fluid to agitate, and removes the clay particle of the pore surface adherency of formation at target locations.
2. the recovery method of heavy crude reservoir as described in claim 1, which is characterized in that further include: continuous monitoring ultrasonic wave behaviour
The water content for making Produced Liquid in well, when it is aqueous rise to 80% or more or oil production less than 1 ton/day when, stop production, into
The steam injection in row next period.
3. the recovery method of heavy crude reservoir as claimed in claim 2, which is characterized in that further include: when being carried out continuously the behaviour that handles up
After making for 5 to 8 periods, when period gas oil ratio drops to 0.2 or less, stops steam soak operation, be changed to combine progress with producing well
Steam drives operation, while the formation at target locations for persistently treating production of heavy oil reservoir carries out ultrasonic wave heating operation, or in ultrasonic wave
Horizontal well is encrypted between operation well and producing well, with gravity drainage mode production of heavy oil reservoir.
4. the recovery method of heavy crude reservoir as described in claim 1, which is characterized in that injected into ultrasonic operation well default
The steam of flow heats the formation at target locations to production of heavy oil reservoir, comprising:
The supersonic generator is closed, the steam of preset flow is injected into ultrasonic operation well, heating is to heavy crude producing oil
The formation at target locations of hiding；
Ultrasonic operation well is closed, until injection steam is converted to water, ultrasonic operation well is opened, treats production of heavy oil reservoir
It is exploited, comprising:
Ultrasonic operation well is closed, until injection steam is converted to water, opens ultrasonic operation well；
The supersonic generator is opened, production of heavy oil reservoir is treated and is exploited.
5. the recovery method of heavy crude reservoir as described in claim 1, which is characterized in that injected into ultrasonic operation well default
The steam of flow heats the formation at target locations to production of heavy oil reservoir, comprising:
Calculate the working time of the supersonic generator；
According to the working time of the supersonic generator and power, the steam of preset flow is injected into ultrasonic operation well,
Heat the formation at target locations to production of heavy oil reservoir.
6. a kind of quarrying apparatus of heavy crude reservoir characterized by comprising
Supersonic generator is arranged in the ultrasonic operation well to production of heavy oil reservoir, waits out for generating ultrasonication
Adopt the formation at target locations of heavy crude reservoir；
Steam injection string heats the target to production of heavy oil reservoir for injecting the steam of preset flow into ultrasonic operation well
Stratum；
Flow string, until injection steam is converted to water, opens ultrasonic operation well for closing ultrasonic operation well, right
It is exploited to production of heavy oil reservoir；
The depth to production of heavy oil reservoir is less than 2000m, and core intersection is greater than 10m, and oil reservoir plane permeability is greater than
500md, oil reservoir vertical permeability are greater than 200md, and viscosity of crude is greater than 2000mPa.s, and oil saturation is greater than 50%, net-gross ratio
Greater than 0.7；
The quarrying apparatus of the heavy crude reservoir further include:
Temperature sensor is arranged in the ultrasonic operation well, for monitoring the raising to production of heavy oil reservoir formation at target locations
Temperature；
The steam injection string is specifically used for according to the raising temperature to production of heavy oil reservoir formation at target locations monitored, to ultrasonic wave
The steam for injecting preset flow in well is operated, the formation at target locations to production of heavy oil reservoir is heated；The value model for increasing temperature
Enclose is 20 DEG C~30 DEG C；
Temperature sensor is arranged in the ultrasonic operation well, for monitoring the raising to production of heavy oil reservoir formation at target locations
Temperature；
The steam injection string is specifically used for according to the raising temperature to production of heavy oil reservoir formation at target locations monitored, to ultrasonic wave
The steam for injecting preset flow in well is operated, the formation at target locations to production of heavy oil reservoir is heated；In the ultrasonic operation well
The value range of pressure and the difference of the reset pressure to production of heavy oil reservoir formation at target locations is less than 2 megapascal；
The supersonic generator is specifically used for:
Make that shear action occurs in the formation at target locations of heavy crude reservoir between different medium using ultrasonic wave, increases liquid fluidity, change
The structure of kind formation at target locations；
Utilize the coupling of first kind longitudinal wave and the second class longitudinal wave that ultrasonic wave generates, the opposite fortune of aggravation solid-liquid two-phase interface
It is dynamic, accelerate isolating and falling off for the two-phase medium of formation at target locations；The first kind longitudinal wave is fast wave, and the second class longitudinal wave is slow wave；
It is propagated in the stratum of saturated oil and water using ultrasonic wave, increases the rock width generation capacity of formation at target locations, increase target
The rock permeability on stratum；
It is acted on using the acoustic streaming of ultrasonic wave, heavy crude reservoir fluid is made to generate strong vortex, the crude oil outflow of stagnant pore utilizes sound
Stream causes fluid to agitate, and removes the clay particle of the pore surface adherency of formation at target locations.
7. the quarrying apparatus of heavy crude reservoir as claimed in claim 6, which is characterized in that the pulse sound of the supersonic generator
For power at 10 kilowatts or more, the frequency range that the supersonic generator generates ultrasonic wave is 20 kHz~25 kHz, institute
The operating temperature of supersonic generator is stated less than 250 DEG C, the operating pressure of the supersonic generator is less than 30 megapascal.
8. the quarrying apparatus of heavy crude reservoir as claimed in claim 6, which is characterized in that the supersonic generator is in ultrasound
Wave operates the supersonic generator of 360 ° of rotations in well.
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| CN107352211B (en) * | 2017-08-08 | 2019-03-29 | 浙江海洋大学 | Underground cavern oil storage perturbed system |
| CN108386168B (en) * | 2018-03-02 | 2023-10-31 | 浙江聚能电气科技有限公司 | Device for heavy oil exploitation by utilizing energy-gathering pulse and application method thereof |
| CN108979605A (en) * | 2018-09-18 | 2018-12-11 | 中国石油集团西部钻探工程有限公司 | The method of impulse wave heavy crude producing device and impulse wave heavy crude producing |
| CN112943210A (en) * | 2021-02-08 | 2021-06-11 | 中国矿业大学 | Electric pulse and ultrasonic wave cooperated coalbed methane enhanced mining method |
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