CN109707354A - Downhole hydraulic pulsation nanometer increasing injection experimental provision and method - Google Patents
Downhole hydraulic pulsation nanometer increasing injection experimental provision and method Download PDFInfo
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- CN109707354A CN109707354A CN201811464949.1A CN201811464949A CN109707354A CN 109707354 A CN109707354 A CN 109707354A CN 201811464949 A CN201811464949 A CN 201811464949A CN 109707354 A CN109707354 A CN 109707354A
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Abstract
The invention belongs to petroleum well increasing injection technical fields, provide a kind of downhole hydraulic pulsation nanometer increasing injection experimental provision and method, experimental provision includes the displacement pump being sequentially communicated by pipeline, intermediate receptacle, pulsating load generating device, core holding unit and stratified stoichiometric system, the core holding unit is connected with confining pressure loading system and resistivity measurement system, the core holding unit is externally provided with insulating box, is equipped with nano material in the intermediate receptacle.The present invention be directed to current fine and close oil-water well increasing injection technical measures validity period is short, the problems such as effect is not significant, by downhole hydraulic pulse technology and nanometer increasing injection Technology Integration Innovation, it is acted synergistically using physical-chemical, improve well treatment radius, improve that nearly well is with holes, infiltration condition, to improve well increasing injection effect, extend measure validity period.
Description
Technical field
The invention belongs to petroleum well increasing injection technical fields；Increase more particularly to a kind of pulsation nanometer decompression of downhole hydraulic
Infuse experimental provision and method.
Background technique
Fine and close oil-water well increasing injection technology mainly include acidification, surfactant, hydraulic vibration, active nano material,
The block releasing techniques such as cycle pulse method.
Acidification is the technical measures for having intensified oil reduction to imitate of well production increment, injection well augmented injection.Its principle is to pass through
Dissolution and corrosion of the acid solution to plug thing in rock cement or formation pore, crack etc., restore or improve formation pore and
The permeability in crack.Under-injected well or deep are dirty caused by for blocking because of the suspended solid particles in reservoir fouling and injection water
Dye, the invalid well of multiple augmented injection.It since acidification technique is to some particular/special requirements of acid solution, needs that additive is added in acid solution, prevent
Only acid solution generates adverse effect in reservoir.Acidification or chemical plugging removal can effectively handle near wellbore zone, the volume increase as auxiliary
Measure.In addition, the acidification technique used for different lithology is also different.
Surfactant can effectively reduce water injection in low-permeability oilfield starting pressure and water injection well injection pressure, to reach drop
The purpose for pressing augmented injection, is a kind of new technology for adapting to low permeability oil field increasing injection, obtains better effects in Daqing Oilfield.
In recent years it has been proposed that under conditions of absolute permeability changes difficult, it is intended to by changing the interface between oil, rock and water
Power, the seepage flow of Lai Gaishan grease improve the permeability of water phase, reduce the new approaches of oil reservoir injection pressure.In this thinking
Under guidance, domestic some low permeability oil fields have carried out low concentration surfactant system increasing injection experimental study successively, and take
Obtained certain achievement.Laboratory test result of study shows surfactant system to inject in rock core, and note can be greatly reduced
Enter pressure, effect most preferably can achieve 40%~60%.In recent years, low concentration surfactant system increasing injection technology had been answered
Field test has been carried out for domestic many oil fields, such as some hyposmosis blocks of grand celebration, triumph and Zhongyuan Oil Field.Well is long-term
Between infuse, stop note or cannot normal injection allocation, shaft bottom is in debt serious, oilwell produced fluid amount is small, formation pressure is low, Liquid output decline rate
Fastly, these problems are prevalent in the test well of these blocks screening, and other well stimulations are difficult to be suitable for these wells.By
In above situation, there is an urgent need to take new increasing injection technology the water flooding effectiveness that improves for hyposmosis extra permeability oilfield
And oil recovery factor.
Hydraulic vibration unblocking and injection increasing technology converts mechanical oscillation for circulating energy by underground vibrating tool, generates pressure
Reeb is propagated in pore channel, and adjust automatically vibration frequency is resonated, makes hole until identical as stratum frequency itself
Salt, dirt and wax on wall are peeled off or fatigue is broken, get through blocked venturi, increase the connectivity between hole, generate solution
Stifled and increasing injection purpose, is usually used in the stratum increasing injection of solid particle in injected water.Site operation shows hydraulic vibration de-plugging
There is preferable plugging removal effect in terms of technology especially borehole wall de-plugging.Hydraulic vibration de-plugging can be used alone as well stimulation,
Also it can be used together with other de-pluggings, such as first be acidified and vibrate afterwards.
Active nano material increasing injection technology, active nano material have extremely strong hydrophobic oleophylic ability.Active nano
Material enters stratum by carrying medium, is adsorbed on formation rock surface, makes rock that wetting overturning occur, and becomes parent from hydrophily
Oiliness stratum, then its oleic permeability is on a declining curve, and water phase permeability is then in rising trend.It has applied and middle original text east oil
Field, the results showed that active nano material can effectively improve water injection well water absorbing capacity, reduce water injection pressure, and without secondary blocking.
Cycle pulse method is that working solution is injected oil reservoir, and borehole pressure is made to improve and reduce rapidly, and forms pulse in oil reservoir
Effect, reduces the structural strength of rock stratum, forms microcrack, makes rock stratum internal void space enlargement, and makes the stifled of pore channel
Plug thing matter is removed, so that the permeability on stratum be made to improve.It injects liquid time stage and improves pressure, but cannot be broken greater than stratum
Split pressure.10 ~ 15 circulations are carried out on every stage pressure, and gas-liquid mixed can be used to greatly improve cycle pulse treatment effect
Object makees working solution.Another method for improving cycle pulse treatment effect is to carry out operation using gas lift string.Every stage pressure into
Backwash after row time circulation, can carry out the plugging particle of processing chronostratigraphic zone.Nearly downhole formation is handled using cycle pulse method, is needed
Longer time and a large amount of working solution are spent, but effect is fine.
It is the developing direction for improving well increasing injection effect, extending measure validity period by the above single technology integrated innovation
One of.According to literature survey as a result, waterpower pulse auxiliary acidization technology, but acid solution used be conventional acid, waterpower pulse
Aided nano increasing injection technology has not been reported.
Summary of the invention
The purpose of the present invention is to provide a kind of downhole hydraulic pulsation nanometer increasing injection experimental provisions, overcome current densification
The problems such as oil-water well increasing injection technical measures validity period is short, and effect is not significant.
It is another object of the present invention to provide downhole hydraulic pulsation nanometer increasing injection experimental methods.
Technical solution provided by the invention is as follows:
Downhole hydraulic pulsation nanometer increasing injection experimental provision, including displacement pump, intermediate receptacle, the arteries and veins being sequentially communicated by pipeline
Dynamic loading generating device, core holding unit and stratified stoichiometric system, the core holding unit are connected with confining pressure loading system and electricity
Resistance rate measuring system, the core holding unit are externally provided with insulating box, are equipped with nano material in the intermediate receptacle.
The core holding unit is cube, and the core holding unit includes simulated injection pit shaft, gum cover, confining pressure load sky
Chamber and simulation extraction pit shaft, the gum cover are set to outside gum cover for wrapping up simulation core, the confining pressure load cavity, the rock core
Each side of clamper is folded from inside to outside by multiple confining pressures load cavity, each confining pressure load cavity respectively with confining pressure
Loading system is connected；
The simulated injection pit shaft and simulation extraction pit shaft are vertically arranged along the diagonal line of cube and communicate with simulation core,
The simulated injection pit shaft and simulation extraction pit shaft include simulation wellbore hole internal layer and simulation wellbore hole outer layer, in the simulation wellbore hole
Layer is set in simulation wellbore hole outer layer and the two circumferentially opposed can move, and is all provided on the simulation wellbore hole internal layer and simulation wellbore hole outer layer
There are multiple boreholes, the out of phase of the simulation wellbore hole internal layer is equipped with the borehole of different number.
The pulsating load generating device includes high-frequency impulse servo valve and three-way body, and the three-way body includes level
To piston inserting mouth, the first vertical inlet opening and the second vertical inlet opening, the horizontal direction piston inserting mouth is set to three-way body
Middle part of sliding channel and rear seal, the setting from top to bottom and under respectively of the first vertical inlet opening and the second vertical inlet opening
Supreme setting, the first vertical inlet opening and the second vertical inlet opening communicate and the two with inside horizontal direction piston inserting mouth
It is arranged in a staggered manner, the second vertical inlet opening is communicated with intermediate receptacle, and the first vertical inlet opening is communicated with core holding unit；
The high-frequency impulse servo valve includes sealing shell and the T-shaped piston in sealing shell, the T-shaped piston end
Portion is extend out in horizontal direction piston inserting mouth, and the T-shaped piston includes horizontal direction piston rod and is mounted on horizontal direction piston rod
The piston head in front, the horizontal direction upper cover of piston rod are equipped with reset spring, and reset spring is installed on piston head and sealing is outer
Between the rear inside wall of shell, the sealing shell front is provided with oil inlet, which is successively connected by hydraulic oil conveyance conduit
Be connected to energy-storage tube, metering piston pump and hydraulic oil storage tank, be provided with oil outlet on the middle and back side wall of the sealing shell, it is described go out
Hydraulic fluid port is connected by reflux line with the oil inlet of hydraulic oil storage tank.
The confining pressure loading system includes confining pressure pump and control cabinet, and the control cabinet is electrically connected with confining pressure pump, the extraction
The exit of fluid flow metering system is equipped with backpressure pump.
Downhole hydraulic pulsation nanometer increasing injection experimental method uses downhole hydraulic pulsation nanometer increasing injection experiment dress
It sets, comprising the following steps:
Longitudinal multilayer heterogeneous core is simulated in step 1) production, is then charged into core holding unit；
Step 2 opens the confining pressure pump in confining pressure loading system, to experiment setting pressure and keeps permanent to core holding unit plus confining pressure
It is fixed；
Step 3) will simulate longitudinal multilayer heterogeneous core and vacuumize injection saturation water flooding；
Step 4) opens insulating box and core holding unit is heated to experiment set temperature and is kept constant；
Step 5) opens displacement pump plus displacement pressure, and the injection rate of displacement pump, note are adjusted according to the injection rate of experimental design
Record displacement pressure one；
Step 6) opens pulsating load generating device, and the nano material that intermediate receptacle is discharged injects rock core after generating pulsating load
Simulation longitudinal direction multilayer heterogeneous core in clamper after the completion of injection, carries out water drive again, records displacement pressure two；
Step 7) obtains the difference of displacement pressure one Yu displacement pressure two, and difference is bigger, then increasing injection effect is good, corresponding to receive
Rice material or injection rate are optimizing technology parameters when the corresponding non-homogeneous multi-layer oil reservoir of the simulation core is constructed.
The longitudinal multilayer heterogeneous core of the simulation passes through natural core or Artificial Core Making, the longitudinal multilayer of the simulation
Model base is made according to practical oil reservoir spread, height fluctuating situation first when heterogeneous core makes, later according to storage
The longitudinal number of plies of layer, is successively processed, bottom agrees with model base.
Process using Artificial Core Making non-homogeneous multi-layer simulation core is as follows: using epoxy according to actual reservoir physical property
Resin and the mixing manufacture of different-grain diameter quartz sand, mixing are completed to be placed on model base, are press-formed, successively process；
After epoxy resin and the mixing of different-grain diameter quartz sand it is not yet cementing before, the probe of resistivity measurement system 8 is embedded in
In each layer, while being embedded in the crack ribbon made of water-soluble high-molecular material polylactic acid in layers crack is arranged.
By resistivity measurement system in experimentation, the resistivity of each position is obtained, by analyzing layer of nanomaterial
Interior distribution situation, and Produced Liquid is collected in outlet end, it analyzes each layer production liquid situation and obtains increasing injection effect, be evenly distributed,
The small then increasing injection effect of production fluid difference is good.
After experiment, by non-homogeneous multi-layer simulation core Slice by slice cutting at API rock core, porosity, permeability, profit are measured
It is moist, further to analyze increasing injection effect.
The nano material is nano polysilicon lotion PS-L, preparation process is as follows: being the second alcohol and water of 3:7 with volume ratio
Mixed solution is solvent, and using ethyl orthosilicate as raw material, hydrolysis occurs under the action of catalyst and generates silicic acid, silicon for ethyl orthosilicate
Dehydration occurs between acid and forms nanometer core, hydrophobically modified dose and the agent of pinning base group modification is then added, with nanometer core surface
- OH bonding, be coated on nano-particle surface, after the reaction was completed, ethyl alcohol be recovered by filtration and washes away inorganic ion and is filtered
Filter cake is dispersed in water by cake, and Hydrophilic modification agent and dispersing aid is added, and nano polysilicon lotion can be obtained in constant temperature stirring
PS-L。
The beneficial effects of the present invention are: the present invention creates downhole hydraulic pulse technology and nanometer increasing injection Integration ofTechnology
Newly, it is acted synergistically using physical-chemical, improves well treatment radius, improve that nearly well is with holes, infiltration condition, to improve well drop
It presses augmented injection effect, extend measure validity period.
It is described in further details below in conjunction with attached drawing.
Detailed description of the invention
Fig. 1 is one embodiment of the present invention structural schematic diagram；
Fig. 2 is the structural schematic diagram of core holding unit；
Fig. 3 is a kind of embodiment schematic diagram of pulsating load generating device；
Fig. 4 is high pulse servo valve and three-way body connection schematic diagram again and again；
Fig. 5 is to simulate longitudinal multilayer heterogeneous core schematic diagram.
In figure: 1, displacement pumps；2, intermediate receptacle；3, pulsating load generating device；4, simulated injection pit shaft；5, simulation extraction
Pit shaft；6, confining pressure loading system；7, core holding unit；8, resistivity measurement system；9, insulating box；10, stratified stoichiometric system；
11, longitudinal multilayer heterogeneous core is simulated；12, simulation wellbore hole outer layer；13, simulation wellbore hole internal layer；14, gum cover；15, confining pressure loads
Cavity；16, hydraulic oil storage tank；17, metering piston pump；18, energy storage canister；19, transition container；20, hydraulic oil delivery control valve；
21, hydraulic oil conveyance conduit；22, high-frequency impulse servo valve；23, three-way body；24, horizontal direction piston inserts mouth；25, first is perpendicular
To inlet opening；26, the second vertical inlet opening；27, T-shaped piston；28, oil inlet；29, reset spring；30, oil outlet.
Specific embodiment
Embodiment 1:
A kind of downhole hydraulic pulsation nanometer increasing injection experimental provision is present embodiments provided, including what is be sequentially communicated by pipeline
Displacement pump 1, intermediate receptacle 2, pulsating load generating device 3, core holding unit 7 and stratified stoichiometric system 10, the rock core clamping
Device 7 is connected with confining pressure loading system 6 and resistivity measurement system 8, and the core holding unit 7 is externally provided with insulating box 9, the centre
Nano material is equipped in container 2.
As shown in Figure 1,1 offer displacement power of displacement pump, the preset working fluid of intermediate receptacle 2 (including driven water-replacing and nanometer
Material), enter core holding unit 7 through pipeline, simulated injection pit shaft 4, confining pressure is loaded into mould through gum cover 14 by confining pressure loading system 6
Quasi- longitudinal direction multilayer heterogeneous core 11, resistivity measurement system 8 is for each position resistivity measurement in displacement process, to analyze
Nano material distribution situation, insulating box 9 are used for simulated formation temperature, and stratified stoichiometric system 10 is used for metering layered produced quantity.
When experiment starts, starting displacement pump 1, high pressure water pushes 2 downlink of intermediate receptacle, and working fluid is forced to enter experiment tube
Line flows into pulsating load generating device 3, and after pulsating load generating device 3, working fluid has pulsating load, carries nanometer
Material enters the longitudinal multilayer heterogeneous core 11 of simulation, is tested by injection pressure, cooperates measurements resistivity, can analyze
Nano material increasing injection effect.
Embodiment 2:
On the basis of embodiment 1, a kind of downhole hydraulic pulsation nanometer increasing injection experimental provision is present embodiments provided, it is described
Core holding unit 7 is cube, and the core holding unit 7 includes simulated injection pit shaft 4, gum cover 14, confining pressure load 15 and of cavity
Simulation extraction pit shaft 5, for wrapping up simulation core, the confining pressure load cavity 15 is set to outside gum cover 14 gum cover 14, described
Each side of core holding unit 7 is folded from inside to outside by multiple confining pressures load cavity 15, and each confining pressure loads cavity 15
It is connected respectively with confining pressure loading system 6；
The simulated injection pit shaft 4 and simulation extraction pit shaft 5 be vertically arranged along the diagonal line of cube and with simulation core phase
Logical, the simulated injection pit shaft 4 and simulation extraction pit shaft 5 are described including simulation wellbore hole internal layer 13 and simulation wellbore hole outer layer 12
Simulation wellbore hole internal layer 13 is set in simulation wellbore hole outer layer 12 and the two circumferentially opposed can move, the simulation wellbore hole internal layer 13 and mould
Multiple boreholes are equipped on quasi- pit shaft outer layer 12, the out of phase of the simulation wellbore hole internal layer 13 is equipped with the big gun of different number
Eye.As shown in Figure 2.
The each end face of cube core holding unit 7 is that the multilayer confining pressure load cavity 15 being arranged from inside to outside folds,
Each confining pressure load cavity 15 is connected with confining pressure pump respectively, and when loaded ring being needed to press, confining pressure pumps to each confining pressure and loads cavity 15
Fluid is injected, each layer forms resultant force and is applied on simulation core by gum cover 14；This method ratio is loaded using conventional load machine, tool
The advantages such as there is uniform load, takes up little area, is easy to operate.
Water filling simulation wellbore hole is made of two layers of pit shaft of simulation wellbore hole internal layer 13 and simulation wellbore hole outer layer 12, can shape between two layers
At sealing, different simulation boreholes are arranged in 13 out of phase of simulation wellbore hole internal layer, and can be rotated, thus can by rotation internal layer pit shaft
The blasthole number being connected with each layer of reservoir is arranged, the water drive situation of different opening degrees is simulated.
Embodiment 3:
On the basis of embodiment 1, a kind of downhole hydraulic pulsation nanometer increasing injection experimental provision is present embodiments provided, it is described
Pulsating load generating device 3 includes high-frequency impulse servo valve 22 and three-way body 23, and the three-way body 23 is living including horizontal direction
Plug inserting mouth 24, the first vertical inlet opening 25 and the second vertical inlet opening 26, the horizontal direction piston inserting mouth 24 are set to threeway
The middle part of sliding channel and rear seal of shell 23, the first vertical inlet opening 25 and the second vertical difference of inlet opening 26 are from top to bottom
It is arranged and is arranged from the bottom to top, the first vertical inlet opening 25 and the second vertical inlet opening 26 inserts mouth with horizontal direction piston
It is communicated inside 24 and the two is arranged in a staggered manner, the second vertical inlet opening 26 is communicated with intermediate receptacle 2, the first vertical feed liquor
Hole 25 is communicated with core holding unit 7；
The high-frequency impulse servo valve 22 includes sealing shell and the T-shaped piston 27 in sealing shell, the T-shaped work
It fills in 27 ends to extend out in horizontal direction piston inserting mouth 24, the T-shaped piston 27 includes horizontal direction piston rod and is mounted on water
The piston head immediately ahead of piston rod is put down, the horizontal direction upper cover of piston rod is equipped with reset spring 29, and reset spring 29 is installed on
Between piston head and the rear inside wall of sealing shell, the sealing shell front is provided with oil inlet 28, which passes through liquid
Pressure oil conveyance conduit 21 is connected with energy-storage tube, metering piston pump 17 and hydraulic oil storage tank 16 in turn, in the sealing shell after
Oil outlet 30 is provided on portion's side wall, the oil outlet 30 is connected by reflux line with the oil inlet 28 of hydraulic oil storage tank.
As shown in Figure 3, Figure 4.In use process, the high pressure liquid pressure oil in hydraulic oil storage tank 16 is through metering piston pump 17, liquid
The oil inlet 28 of high-frequency impulse servo valve 22 is sent into the output of pressure oil delivery control valve 20, and accordingly pushes T font piston horizontal direction
After move, meanwhile, the displacing fluid for flowing to the second vertical fluid hole by the first vertical inlet opening 25 is impacted, T font piston
Level moves backward the reset spring 29 that gradually reduces in the process, and when T font piston motion to oil outlet 30, starts to let out
Pressure, i.e. high pressure liquid pressure oil in horizontal direction plunger shaft are discharged from oil outlet 30, and the high pressure liquid pressure oil being discharged from oil outlet 30 is logical
It crosses reflux line and is back to hydraulic oil storage tank；After the high pressure liquid pressure oil in horizontal direction plunger shaft is discharged from oil outlet 30, and work as
When the elastic force of reset spring 29 is greater than thrust of the high pressure liquid pressure oil to T font piston, T font piston is in reset spring 29
Effect is lower to return to original position, so constantly reciprocal, and mutually the first vertical inlet opening 25 of reply flow to the displacement of the second vertical fluid hole
Liquid is constantly impacted, so that waterpower pulse is generated in vertical fluid hole, it is non-to the simulation longitudinal direction multilayer in rock core fastener
Homogeneous rock core 11 carries out impulse action.
In the present embodiment, the hydraulic oil conveyance conduit 21 between energy storage canister 18 and the inlet of high-frequency impulse servo valve 22
Upper that middle transition container 19 is housed, effect is buffering.Wherein, confining pressure loading system 6 include confining pressure pump and control cabinet, control cabinet with
Confining pressure pump electrical connection, the exit for producing fluid flow metering system are equipped with backpressure pump.When outlet pressure is greater than the setting pressure of backpressure pump
When power, Produced Liquid discharge.
Embodiment 4:
On the basis of embodiment 2, a kind of downhole hydraulic pulsation nanometer increasing injection experimental method is present embodiments provided, is used
Downhole hydraulic pulsation nanometer increasing injection experimental provision, comprising the following steps:
Longitudinal multilayer heterogeneous core 11 is simulated in step 1) production, is then charged into core holding unit 7；
Step 2 opens the confining pressure pump in confining pressure loading system 6, to experiment setting pressure and keeps to core holding unit 7 plus confining pressure
It is constant；
Step 3) will simulate longitudinal multilayer heterogeneous core 11 and vacuumize injection saturation water flooding；
Step 4) opens insulating box 9 and core holding unit 7 is heated to experiment set temperature and is kept constant；
Step 5) opens displacement pump 1 plus displacement pressure, and the injection rate of displacement pump 1 is adjusted according to the injection rate of experimental design,
Record displacement pressure one；
Step 6) opens pulsating load generating device 3, and the nano material that intermediate receptacle 2 is discharged injects rock after generating pulsating load
Simulation longitudinal direction multilayer heterogeneous core 11 in heart clamp holder 7 after the completion of injection, carries out water drive again, records displacement pressure two；
Step 7) obtains the difference of displacement pressure one Yu displacement pressure two, and difference is bigger, then increasing injection effect is good, corresponding to receive
Rice material or injection rate are optimizing technology parameters when the corresponding non-homogeneous multi-layer oil reservoir of the simulation core is constructed.
The experimental method is to simulate increasing injection feelings under the technological parameters such as different nano materials, discharge capacity, nano material concentration
Condition provides technical support to fracturing parameter design, process optimization for stall temporary under panting action.
Embodiment 5:
On the basis of embodiment 4, a kind of downhole hydraulic pulsation nanometer increasing injection experimental method is present embodiments provided, it is described
It simulates longitudinal multilayer heterogeneous core 11 and passes through natural core or Artificial Core Making, the longitudinal multilayer heterogeneous core of the simulation
Model base is made according to practical oil reservoir spread, height fluctuating situation first when 11 production, later according to reservoir longitudinal layer
Number, is successively processed, and bottom agrees with model base.Simulate longitudinal multilayer heterogeneous core 11 as shown in Figure 5.
Process using Artificial Core Making non-homogeneous multi-layer simulation core is as follows: using epoxy according to actual reservoir physical property
Resin and the mixing manufacture of different-grain diameter quartz sand, mixing are completed to be placed on model base, are press-formed, successively process；
After epoxy resin and the mixing of different-grain diameter quartz sand it is not yet cementing before, the probe of resistivity measurement system 8 is embedded in
In each layer, while being embedded in the crack ribbon made of water-soluble high-molecular material polylactic acid in layers crack is arranged.
By resistivity measurement system 8 in experimentation, the resistivity of each position is obtained, by analyzing layer of nanomaterial
Interior distribution situation, and Produced Liquid is collected in outlet end, it analyzes each layer production liquid situation and obtains increasing injection effect, be evenly distributed,
The small then increasing injection effect of production fluid difference is good.
After experiment, porosity, infiltration can also be measured by non-homogeneous multi-layer simulation core Slice by slice cutting at API rock core
Rate, wetability, further to analyze increasing injection effect.
Nano material is nano polysilicon lotion PS-L, and preparation process is as follows: the mixing of the second alcohol and water with volume ratio for 3:7
Solution is solvent, using ethyl orthosilicate as raw material, ethyl orthosilicate occur under the action of catalyst hydrolysis generate silicic acid, silicic acid it
Between occur dehydration form nanometer core, hydrophobically modified dose and pinning group (hydrophilic radical) dressing agent is then added, with nanometer core
- the OH on surface is bonded, and is coated on nano-particle surface, after the reaction was completed, ethyl alcohol is recovered by filtration and washes away inorganic ion obtains
To filter cake, filter cake is dispersed in water, Hydrophilic modification agent and dispersing aid is added, nano polysilicon cream can be obtained in constant temperature stirring
Liquid PS-L.
Using liquid phase surface modification technology in situ, a nano polysilicon lotion has been synthesized.It is nascent in nano silicon dioxide particles
Cheng Shi, by with strong suction-operated group and hydrophobic grouping be bonded to the surface of nanoparticle, this can not only assign poly- silicon
Hydrophobicity and adsorptivity, moreover it is possible to control nano-particles size to a certain degree, be conducive to enter earth formation deep.To hydrophobic modification
After, Hydrophilic modification is added and and prepares nano polysilicon lotion under the coordinative role of dispersing aid.
The foregoing examples are only illustrative of the present invention；The limitation to protection scope of the present invention is not constituted；It is all
It is within being all belonged to the scope of protection of the present invention with the same or similar design of the present invention.The component that embodiment does not describe in detail
With the well-known components and common structure or conventional means of the structure category industry；Here it does not describe one by one.
Claims (10)
- The nanometer increasing injection experimental provision 1. downhole hydraulic is pulsed, it is characterised in that: including the displacement being sequentially communicated by pipeline Pump (1), intermediate receptacle (2), pulsating load generating device (3), core holding unit (7) and stratified stoichiometric system (10), the rock Heart clamp holder (7) is connected with confining pressure loading system (6) and resistivity measurement system (8), and the core holding unit (7) is externally provided with perseverance Incubator (9), the intermediate receptacle (2) is interior to be equipped with nano material.
- The nanometer increasing injection experimental provision 2. downhole hydraulic according to claim 1 is pulsed, it is characterised in that: the rock core Clamper (7) is cube, and the core holding unit (7) includes simulated injection pit shaft (4), gum cover (14), confining pressure load cavity (15) and simulation extraction pit shaft (5), the gum cover (14) are set to glue for wrapping up simulation core, confining pressure load cavity (15) Cover (14) outside, each side of the core holding unit (7) is folded from inside to outside by multiple confining pressures load cavity (15), often A confining pressure load cavity (15) is connected with confining pressure loading system (6) respectively；The simulated injection pit shaft (4) and simulation extraction pit shaft (5) be vertically arranged along the diagonal line of cube and with simulation rock The heart communicates, and the simulated injection pit shaft (4) and simulation extraction pit shaft (5) include outside simulation wellbore hole internal layer (13) and simulation wellbore hole Layer (12), the simulation wellbore hole internal layer (13) is set in simulation wellbore hole outer layer (12) and the two circumferentially opposed can move, the mould Multiple boreholes, the different phases of the simulation wellbore hole internal layer (13) are equipped on quasi- pit shaft internal layer (13) and simulation wellbore hole outer layer (12) Position is equipped with the borehole of different number.
- The nanometer increasing injection experimental provision 3. downhole hydraulic according to claim 1 is pulsed, it is characterised in that: the pulsation Load generating device (3) includes high-frequency impulse servo valve (22) and three-way body (23), and the three-way body (23) includes level To piston inserting mouth (24), the first vertical inlet opening (25) and the second vertical inlet opening (26), the horizontal direction piston inserts mouth (24) middle part of sliding channel and rear seal of three-way body (23), the first vertical inlet opening (25) and the second vertical feed liquor are set to Hole (26) is from top to bottom arranged respectively and is arranged from the bottom to top, the first vertical inlet opening (25) and the second vertical inlet opening (26) it is communicated with horizontal direction piston inserting mouth (24) inside and the two is arranged in a staggered manner, the second vertical inlet opening (26) is in Between container (2) communicate, the first vertical inlet opening (25) communicates with core holding unit (7)；The high-frequency impulse servo valve (22) includes sealing shell and the T-shaped piston (27) in sealing shell, the T word Shape piston (27) end is extend out in horizontal direction piston inserting mouth (24), and the T-shaped piston (27) includes horizontal direction piston rod With the piston head being mounted on immediately ahead of horizontal direction piston rod, the horizontal direction upper cover of piston rod is equipped with reset spring (29), resets Spring (29) is installed between piston head and the rear inside wall of sealing shell, and the sealing shell front is provided with oil inlet (28), The oil inlet (28) is connected with energy-storage tube, metering piston pump (17) and hydraulic oil storage tank in turn by hydraulic oil conveyance conduit (21) (16), it is provided with oil outlet (30) on the middle and back side wall of the sealing shell, the oil outlet (30) passes through reflux line and liquid The oil inlet (28) of pressure oil storage tank connects.
- The nanometer increasing injection experimental provision 4. downhole hydraulic according to claim 1 is pulsed, it is characterised in that: the confining pressure Loading system (6) includes confining pressure pump and control cabinet, and the control cabinet is electrically connected with confining pressure pump, the extraction fluid flow metering system Exit is equipped with backpressure pump.
- The nanometer increasing injection experimental method 5. downhole hydraulic is pulsed is dropped using downhole hydraulic pulsation nanometer described in claim 1 Press augmented injection experimental provision, which comprises the following steps:Longitudinal multilayer heterogeneous core (11) is simulated in step 1) production, is then charged into core holding unit (7)；Step 2 opens the confining pressure pump in confining pressure loading system (6), adds confining pressure extremely experiment setting pressure simultaneously to core holding unit (7) It keeps constant；Step 3) will simulate longitudinal multilayer heterogeneous core (11) and vacuumize injection saturation water flooding；Step 4) opens insulating box (9) and core holding unit (7) is heated to experiment set temperature and is kept constant；Step 5) opens displacement pump (1) plus displacement pressure, and the injection speed of displacement pump (1) is adjusted according to the injection rate of experimental design Degree records displacement pressure one；Step 6) opens pulsating load generating device (3), and the nano material that intermediate receptacle (2) are discharged is infused after generating pulsating load Enter the simulation longitudinal direction multilayer heterogeneous core (11) in core holding unit (7), after the completion of injection, carries out water drive again, record drives For pressure two；Step 7) obtains the difference of displacement pressure one Yu displacement pressure two, and difference is bigger, then increasing injection effect is good, corresponding to receive Rice material or injection rate are optimizing technology parameters when the corresponding non-homogeneous multi-layer oil reservoir of the simulation core is constructed.
- The nanometer increasing injection experimental method 6. downhole hydraulic according to claim 5 is pulsed, it is characterised in that: the simulation Longitudinal multilayer heterogeneous core (11) passes through natural core or Artificial Core Making, the longitudinal multilayer heterogeneous core of the simulation (11) model base is made according to practical oil reservoir spread, height fluctuating situation first when making, later according to reservoir longitudinal direction The number of plies, is successively processed, and bottom agrees with model base.
- The nanometer increasing injection experimental method 7. downhole hydraulic according to claim 6 is pulsed, it is characterised in that: using artificial The process that rock core makes non-homogeneous multi-layer simulation core is as follows: using epoxy resin and different-grain diameter stone according to actual reservoir physical property Sand mixing manufacture, mixing are completed to be placed on model base, are press-formed, successively process；After epoxy resin and the mixing of different-grain diameter quartz sand it is not yet cementing before, the probe of resistivity measurement system (8) is embedding In each layer, while being embedded in the crack ribbon made of water-soluble high-molecular material polylactic acid in layers crack is arranged.
- The nanometer increasing injection experimental method 8. downhole hydraulic according to claim 5 is pulsed, it is characterised in that: experimentation In by resistivity measurement system (8), obtain the resistivity of each position, by distribution situation in analysis layer of nanomaterial, with And collect Produced Liquid in outlet end, analyze each layer and produce liquid situation and obtain increasing injection effect, be evenly distributed, production fluid difference it is small then Increasing injection effect is good.
- The nanometer increasing injection experimental method 9. downhole hydraulic according to claim 5 is pulsed, it is characterised in that: experiment terminates Afterwards, non-homogeneous multi-layer simulation core Slice by slice cutting is measured into porosity, permeability, wetability, at API rock core further to divide Analyse increasing injection effect.
- The nanometer increasing injection experimental method 10. downhole hydraulic according to claim 5 is pulsed, it is characterised in that: described to receive Rice material is nano polysilicon lotion PS-L, and preparation process is as follows: the mixed solution of the second alcohol and water with volume ratio for 3:7 is molten Agent, using ethyl orthosilicate as raw material, hydrolysis occurs under the action of catalyst and generates silicic acid for ethyl orthosilicate, occurs between silicic acid de- Water forms nanometer core, and hydrophobically modified dose and the agent of pinning base group modification is then added, is bonded with-the OH on nanometer core surface, coats In nano-particle surface, after the reaction was completed, ethyl alcohol is recovered by filtration and washes away inorganic ion obtains filter cake, filter cake is dispersed in water In, Hydrophilic modification agent and dispersing aid is added, nano polysilicon lotion PS-L can be obtained in constant temperature stirring.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112324406A (en) * | 2020-11-02 | 2021-02-05 | 王战勇 | Nano-pulse high-pressure blockage removal, pressure reduction and storage increase method for low-permeability water-sensitive oil reservoir water well |
| CN114961670A (en) * | 2021-02-22 | 2022-08-30 | 中国石油天然气股份有限公司 | Gas-solid mixing device, device and method for improving low-order reservoir coal bed gas yield |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101985875A (en) * | 2010-09-27 | 2011-03-16 | 中国石油大学(华东) | Hydraulic pulse-assisted reservoir chemical remedial treatment experiment device and method |
| CN102031955A (en) * | 2010-09-27 | 2011-04-27 | 中国石油大学(华东) | Ultrasonic-assisted reservoir stratum chemical blockage removal experimental facility and experimental method |
| CN202023547U (en) * | 2011-04-29 | 2011-11-02 | 中国矿业大学 | Coal mine underground pulsed hydraulic fracturing equipment |
| CN104005741A (en) * | 2014-06-04 | 2014-08-27 | 中国石油大学(华东) | Multi-phase fluid oil displacement and pulse unblocking integrated physical simulation experiment device and method |
| CN105545267A (en) * | 2015-12-09 | 2016-05-04 | 东北石油大学 | Method for realizing variable filtrational resistance oil displacement |
| CN107083944A (en) * | 2017-06-08 | 2017-08-22 | 西安石油大学 | A kind of Oil/gas Well hydraulic fracturing underground low frequency hydraulic pulse generating means |
| CN107355219A (en) * | 2016-05-09 | 2017-11-17 | 中国石油化工股份有限公司 | Fractured reservoir model and its application method |
-
2018
- 2018-12-03 CN CN201811464949.1A patent/CN109707354A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101985875A (en) * | 2010-09-27 | 2011-03-16 | 中国石油大学(华东) | Hydraulic pulse-assisted reservoir chemical remedial treatment experiment device and method |
| CN102031955A (en) * | 2010-09-27 | 2011-04-27 | 中国石油大学(华东) | Ultrasonic-assisted reservoir stratum chemical blockage removal experimental facility and experimental method |
| CN202023547U (en) * | 2011-04-29 | 2011-11-02 | 中国矿业大学 | Coal mine underground pulsed hydraulic fracturing equipment |
| CN104005741A (en) * | 2014-06-04 | 2014-08-27 | 中国石油大学(华东) | Multi-phase fluid oil displacement and pulse unblocking integrated physical simulation experiment device and method |
| CN105545267A (en) * | 2015-12-09 | 2016-05-04 | 东北石油大学 | Method for realizing variable filtrational resistance oil displacement |
| CN107355219A (en) * | 2016-05-09 | 2017-11-17 | 中国石油化工股份有限公司 | Fractured reservoir model and its application method |
| CN107083944A (en) * | 2017-06-08 | 2017-08-22 | 西安石油大学 | A kind of Oil/gas Well hydraulic fracturing underground low frequency hydraulic pulse generating means |
Non-Patent Citations (1)
| Title |
|---|
| VIP专项文档: "纳米聚硅降压增注剂", 《百度文库》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112324406A (en) * | 2020-11-02 | 2021-02-05 | 王战勇 | Nano-pulse high-pressure blockage removal, pressure reduction and storage increase method for low-permeability water-sensitive oil reservoir water well |
| CN112324406B (en) * | 2020-11-02 | 2022-10-25 | 王战勇 | Nano-pulse high-pressure blockage removal, pressure reduction and storage increase method for low-permeability water-sensitive oil reservoir water well |
| CN114961670A (en) * | 2021-02-22 | 2022-08-30 | 中国石油天然气股份有限公司 | Gas-solid mixing device, device and method for improving low-order reservoir coal bed gas yield |
| CN114961670B (en) * | 2021-02-22 | 2023-07-25 | 中国石油天然气股份有限公司 | Gas-solid mixing device, device and method for improving coalbed methane yield of low-order reservoir |
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