CN107288592A - A kind of double slug type profile control agents of compound rhythm oil reservoir and its application method - Google Patents
A kind of double slug type profile control agents of compound rhythm oil reservoir and its application method Download PDFInfo
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- CN107288592A CN107288592A CN201710663638.7A CN201710663638A CN107288592A CN 107288592 A CN107288592 A CN 107288592A CN 201710663638 A CN201710663638 A CN 201710663638A CN 107288592 A CN107288592 A CN 107288592A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- 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
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/512—Compositions based on water or polar solvents containing organic compounds macromolecular compounds containing cross-linking agents
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
- C09K8/584—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids characterised by the use of specific surfactants
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
Abstract
A kind of double slug type profile control agents of compound rhythm oil reservoir and its application method, are related to field use chemical field.The present invention injects compound rhythm oil reservoir, preposed attributives mixing high molecule mass Complex polymer and chromium aluminium ion crosslinking agent by double slug forms, with the strong characteristic of high viscosity, shear resistant, can implement firm closure to hypertonic band in the middle part of oil reservoir；Rearmounted slug is compound surfactant, oil reservoir is injected after preposed attributives are effectively blocked, to without being oozed in closure, hypotonic band carry out surfactant flooding, to reduce residual oil content in oil reservoir, increase oil reservoir injectivity index, improve wax, the phenomenon that colloid, asphalitine are deposited near wellbore zone；The present invention improves Reservoir Heterogeneity by way of double slug combinations, increases sequent water flooding sweep efficiency, suppresses compound rhythm oil reservoir region of bypassed oil and is formed, to improve traditional oil production method to drawbacks such as the compound low, deficiencies in economic performance of rhythm oil recovery.
Description
Technical field
The present invention relates to a kind of double slug type profile control agents of compound rhythm oil reservoir and its application method, the profile control agent can improve storage
Layer adaptability, and then compound rhythm type of law oil reservoir oil recovery can be improved, belong to field use chemical agent field.
Background technology
Reservoir heterogeneity refers to the inhomogeneity inside reservoir, is mainly shown as the side such as reservoir lithology, physical property, oiliness
The anisotropy in face, it is to influence the main cause of remaining oil distribution；According to the microcosmic Petrographic Features change on reservoir longitudinal direction
Rule, is divided into positive rhythm, the anti-rhythm and compound rhythm reservoir；Positive rhythm reservoir is the common trait of various fluvial deposit sand bodies,
From sandstone bottom to top granularity from the coarse to fine, permeability is by high step-down；Due to the difference of river deposition, many positive rhythms
The permeability grade change of layer of sand is a kind of highly undesirable oil reservoir so as to cause the difference of oil saturation very greatly；The anti-rhythm
Oil reservoir reflection depositional environment hydrodynamic condition grows from weak to strong rule change, and its highest permeable formation is at the top of sand body, rock from top to bottom
Property, physical property be gradually deteriorated, density gradually increases, apparent resistivity reduction, due to the difference of deposition, many coarsening upwards sands
Permeability grade changes very greatly, is also a kind of highly undesirable oil reservoir so as to cause the difference of oil saturation；It is compound
Rhythm oil reservoir is the combination of positive and negative two kinds of cadence types, its internal lithology, physical property, electrical property feature and rule of waterflooding respectively by
Top and the bottom cadence type control, during water flooding, shows as middle part and advances by leaps and bounds or more uniform waterline propulsion type,
It is generally middle and high water logging in the middle part of the rhythm；It is low, non-water logging at the top and bottom of the rhythm.
Largely the compound actual recovery percent of reserves of rhythm oil reservoir is 10%~20%, and recovery percent of reserves is relatively low, there are some researches show：It is compound
Rhythm Reservoir Permeability is differential bigger, and its anisotropism is more serious, and recovery percent of reserves is lower, faster, the hypertonic band displacement of reservoir oil of aqueous rising
Efficiency is higher, and low-permeability layer oil displacement efficiency is then lower；During waterflooding extraction, the injection water overwhelming majority all pours in hypertonic band, and
In, the water-driven of low-permeability layer it is very poor with situation；Due to interlayer contradiction, the middle and high most moveable oils for oozing band are in hand-hole
Produced before gap volume 1PV, influence of later more than the 1PV injection water to improving recovery ratio amplitude is relatively small；Remaining oil master
Want branch in hypotonic interval, permeability grade is bigger, low-permeability layer oil displacement efficiency is lower, the ratio of remaining oil branch is bigger.
Recovery efficiency technique demand is improved for compound rhythm oil reservoir, the present invention a kind of pair of slug type profile control agent of design overcomes
It is above-mentioned during the water drive the drawbacks of.
The content of the invention
It is an object of the invention to provide a kind of double slug type profile control agents of compound rhythm oil reservoir and its application method, its feature
It is, double compound rhythm oil reservoirs of slug form injection, preposed attributives mixing high molecule mass Complex polymer is handed over chromium aluminium ion
Join agent, with the strong characteristic of high viscosity, shear resistant, firm closure can be implemented to hypertonic band in the middle part of oil reservoir；Rearmounted slug is multiple
With surfactant, oil reservoir is injected after preposed attributives are effectively blocked, to without being oozed in closure, hypotonic band carry out surface-active
Agent is driven, and to reduce residual oil content in oil reservoir, increase oil reservoir injectivity index, improves wax, colloid, asphalitine heavy near wellbore zone
Long-pending phenomenon；The present invention improves Reservoir Heterogeneity by way of double slug combinations, increases sequent water flooding sweep efficiency, suppresses
Compound rhythm oil reservoir region of bypassed oil is formed, to improve traditional oil production method to compound low, deficiency in economic performance of rhythm oil recovery etc.
Drawback.
To reach above-mentioned purpose, the present invention is adopted the following technical scheme that.
It is an object of the invention to provide a kind of double slug type profile control agents of compound rhythm oil reservoir and its application method, its is main
Composition is：Partially hydrolyzed polyacrylamide (PHPA) relative molecular weight is respectively 1000*104、1500*104、2000*104, chromium acetate, three
Aluminium chloride, sodium sulfite, triethanolamine, sodium potassium tartrate tetrahydrate, cocoanut fatty acid diethanolamide, trimethyl chlorination
Ammonium, Cocoamidopropyl betaine；For compound rhythm oil reservoir, the double slug formula profile control agents of design, below with slug A profile control agents and
Slug B is described.
Slug A profile control agents include Complex polymer and additive；Wherein, Complex polymer is by three kinds of different molecular quality
Partially hydrolyzed polyacrylamide (PHPA) is constituted, and molecular mass is respectively 1000*104、1500*104、2000*104, its mass ratio is 35：
45：20；Additive includes chromium acetate, alchlor, sodium sulfite, triethanolamine, sodium potassium tartrate tetrahydrate；It is multiple in slug A profile control agents
It is 0.2%-0.3% with polymer quality ratio, chromium acetate mass ratio is 0.1%-0.2%, and alchlor mass ratio is 0.1%-
0.2%, sodium sulfite mass ratio is 0.3%-0.4%, and triethanolamine mass ratio is 0.1%-0.2%, sodium potassium tartrate tetrahydrate quality
Than for 0.1%-0.2%, remaining components is prepare water.
Preferably, in slug A profile control agents, Complex polymer, chromium acetate, alchlor, sodium sulfite, triethanolamine, wine
Stone acid potassium sodium mass ratio is 0.22%-0.28%：0.12%-0.18%：0.12%-0.18%：0.33%-0.37%：
0.12%-0.18%：0.12%-0.18%, remaining components are preparation water.
It is highly preferred that in slug A profile control agents, Complex polymer, chromium acetate, alchlor, sodium sulfite, triethanolamine,
Sodium potassium tartrate tetrahydrate mass ratio is 0.25%：0.15%：0.15%：0.35%：0.15%：0.15%, remaining components are preparation water.
Slug A profile control agent main function mechanism is to pass through three kinds of high molecule mass partially hydrolyzed polyacrylamide (PHPA)s and chromium aluminium
Ionomer is compounded, and forms the polymer with matrix type cross-linked structure, with stable, the broken glue time length of colloid physical property, salt tolerant
Property etc. effect, hypertonic band in the middle part of compound rhythm oil reservoir can effectively be blocked；Triethanolamine is used as auxiliary crosslinking agent, is increased
Strong profile control agent stability, and increase broken glue time；Sodium potassium tartrate tetrahydrate is used as dispersant, can make Complex polymer system point
More uniformly spread between son, the peripheral absorption affinity of increase molecular coil, so that it is hypertonic in the middle part of compound rhythm oil reservoir to improve profile control agent
The plugging effect of band；What the oxygen that sodium sulfite can effectively suppress in process for preparation and in oil reservoir as oxygen scavenger was produced to profile control agent
Viscosity reduction effect, increases the stability of profile control agent；Slug A is mainly used as blocking hypertonic band in the middle part of compound rhythm oil reservoir, improves compound
The anisotropism of rhythm oil reservoir so that be subsequently implanted into slug B can enter in compound rhythm oil reservoir, less permeable layer, so as to form double
Slug acts synergistically.
Slug B includes cocoanut fatty acid diethanolamide, DTAC, cocamidopropyl propyl amide beet
Alkali；In slug B, cocoanut fatty acid diethanolamide mass ratio is 0.5%-1%, DTAC mass ratio
For 1%-2%, Cocoamidopropyl betaine mass ratio is 0.5%-1%, and remaining components are preparation water.
Preferably, in slug B, cocoanut fatty acid diethanolamide, DTAC, coconut oleoyl amine third
Base glycine betaine mass ratio is 0.6%-0.9%：1.2%-1.8%：0.6%-0.9%, remaining components are preparation water.
It is highly preferred that in slug B, cocoanut fatty acid diethanolamide, DTAC, coconut oleoyl amine
CAB mass ratio is 0.75%：1.5%：0.75%, remaining components are preparation water.
Slug B main function mechanism is, by mixing nonionic surfactant cocoanut fatty acid diethanolamide, sun
Ionic surface active agent DTAC and zwitterionic surfactant Cocoamidopropyl betaine, are played
Surfactant cooperative effect；Compound surfactant solution has relatively low surface and interface tension force, and stronger wetting
Ability, can improve rock hydrophily, and washing oil purpose is reached indirectly, be referred to reducing residual oil content in oil reservoir, increase oil reservoir water suction
Number；Three kinds of surfactant compounds, can increase its saline-alkaline tolerance, can adapt to different types of stratum water；And three kinds of tables
Face activating agent composite usage effect is better than single surfactant；After slug A forms effectively closure, slug B is injected into oil reservoir,
Ooze, low-permeability layer carries out surfactant flooding, with the closure oozed in reduction, low-permeability layer residual oil is caused to oil reservoir, increase in can entering
Its strong flow conductivity；Improve Reservoir Heterogeneity by way of double slug combinations, increase sequent water flooding sweep efficiency, suppress multiple
Close rhythm oil reservoir region of bypassed oil to be formed, and oil reservoir is further developed by sequent water flooding.
The application method of the double slug type profile control agents of a kind of compound rhythm oil reservoir, it is characterised in that comprise the following steps：
Step 1. combines oil field actual production design data profile control agent injection rate, injection rate and other injection parameters；
Step 2. pair prepares water and carries out sudden and violent oxygen processing, prepares water and uses oilfield sewage or source water, is dissolved preparing in water
Oxygen content
It is reduced to below 3mg/L；
Under the conditions of 15-55 DEG C of step 3. temperature range, in the mixing container, medicament is added to preparing in water, is at the uniform velocity stirred
4-6
Hour, obtain profile control agent；
Step 4. is carried out to water injection well in machine plugging operation, the compound rhythm oil reservoir of closure, hypotonic band, makes injection profile agent
Into
The hypertonic band in middle part；
Water injection well is connected by step 5. with stainless steel and supercharging device, starts supercharging device, and slug A profile control agents are injected
Oil reservoir,
Injection rate reaches that static 24-48 hours makes the abundant plastic of profile control agent after preset range；
Step 6. releases machine plugging, injects driven water-replacing 0.15PV, injects slug B, then carries out follow-up note and adopts operation.
The specific injection rate of profile control agent is：Slug A profile control agent 0.2-0.3PV are injected first into oil reservoir or rock core, 24- is waited
Make within 48 hours the abundant plastic of slug A profile control agents, then to driven water-replacing 0.15PV is injected in oil reservoir or rock core, then to oil reservoir or rock
Slug B0.2-0.3PV is injected in the heart, is then carried out follow-up note and is adopted operation.
The present invention the advantage is that relative to prior art：
1st, recovery efficiency technique demand is improved for compound rhythm oil reservoir, a kind of compound rhythm oil reservoir compounding of present invention design is poly-
Compound type profile control agent, it is characterised in that Complex polymer type profile control agent slug A, it is poly- by three kinds of high molecule mass partial hydrolysis
Acrylamide is compounded, and forms the Compositional type polymer with molecular coil form, can be to hypertonic in the middle part of compound rhythm oil reservoir
Band implements firm closure.
2nd, in slug A, it is used as crosslinking agent by adding chromium acetate, alchlor, matrix type cross-linked structure can be formed, had
The effects such as stable, the broken glue time length of colloid physical property, salt tolerance.
3rd, in slug A, sodium sulfite can effectively suppress in process for preparation with the oxygen in oil reservoir to profile control agent as oxygen scavenger
The viscosity reduction effect of generation, strengthens the stability of profile control agent.
4th, in slug B, nonionic surfactant cocoanut fatty acid diethanolamide, cationic surfactant are passed through
DTAC and zwitterionic surfactant Cocoamidopropyl betaine compound synergic, play surface work
Property agent cooperative effect, its application effect be better than single surfactant.
5th, the present invention injects form by double slugs, improves compound rhythm Reservoir Heterogeneity, recovery percent of reserves is low, absorbing water refers to
Number is low and water injection pressure is big, increases sequent water flooding sweep efficiency, suppresses region of bypassed oil generation, to improve traditional oil production method to compound
The drawbacks such as rhythm oil recovery is low, deficiency in economic performance.
Embodiment
Experimental method used in following embodiments is conventional method unless otherwise specified.
The partially hydrolyzed polyacrylamide (PHPA) used in following embodiments produces for Daqing Refinery company of CNPC, relative point
Protonatomic mass is 1000*104、1500*104、2000*104, effective mass fraction is 90%；Chromium acetate is Shandong West Asia chemical industry
Co., Ltd produces, and analyzes pure；Alchlor produces for Jining Hong Ming chemical reagent Co., Ltd, analyzes pure；Sodium sulfite is
Tianjin Zhi Yuan chemical reagent Co., Ltd produces, and analyzes pure；Triethanolamine produces for Nanjing chemical reagent limited company,
Analyze pure AR；Sodium potassium tartrate tetrahydrate produces for Dezhou Run Xin laboratory apparatus Co., Ltd, analyzes pure AR；Coco-nut oil fatty acid diethanol
Acid amides is the small wild chemical limited company's production in Shandong, is analyzed pure；DTAC is Nanjing chemical reagent
Limited company produces, purity 98%；Cocoamidopropyl betaine produces for Guangzhou Ying Hong Chemical Co., Ltd.s, industry
Level.
Profile control agent plugging effect is evaluated by laboratory core experimental method, it is specific as follows：
Embodiment one：
1st, profile control agent application method：(1) sudden and violent oxygen processing is carried out to preparing water first, content of oxygen dissolved in water reduction will be prepared
To below 3mg/L；(2) under the conditions of 15 DEG C of temperature, medicament is added to preparing in water, at the uniform velocity stirs 4 hours, obtains profile control agent；(3)
Profile control agent is directly injected into rock core after the completion of preparation.
2nd, water is prepared, is 500mg/L by adding NaCl into distilled water and adjusting to salinity, to simulate actual production
The middle source water used.
3rd, concrete medicament application amount is：
Slug A Complex polymers are made up of the partially hydrolyzed polyacrylamide (PHPA) of three kinds of different molecular quality, molecular mass point
Wei not 1000*104、1500*104、2000*104, its mass ratio is 35：45：20, Complex polymer, chromium acetate, alchlor,
Sodium sulfite, triethanolamine, sodium potassium tartrate tetrahydrate mass ratio are 0.25%：0.15%：0.15%：0.35%：0.15%：
0.15%, remaining components are preparation water.
Slug B：Cocoanut fatty acid diethanolamide, DTAC, Cocoamidopropyl betaine
Mass ratio is 0.75%：1.5%：0.75%, remaining components are preparation water.
4th, specific rock core manufacture scale is as follows：
Experiment rock core is quartz sand epoxy resin cementitious five layers of heterogeneous artificial cores, and specific size is 4.5cm*
4.5cm*30cm, from top to bottom perm-plug method is respectively 500*10-3μm2、1000*10-3μm2、2000*10-3μm2、1000*
10-3μm2、500*10-3μm2, compound rhythm oil reservoir is simulated by heterogeneous core.
5th, displacement oil is viscosity 37mPa.s in the case of crude oil, 30 DEG C.
6th, sealing characteristics test operating procedure is as follows：
(1) rock core to be used is put into 70 DEG C of insulating boxs and dried to constant weight, weighed its quality after taking out cooling, be designated as
m1；
(2) rock core after drying is put into saturation in vacuum pumping device and prepares water, during the bubble-free generation of observation core surface
Stop pumping, surface water is removed into rock core taking-up wiping, weighed, quality is designated as m2；
(3) rock core that saturation is configured into water is put into core holding unit, plus confined pressure 4MPa, then with 2mL/min speed
Into rock core, injection configuration water, records the pressure and flow when pressure stability；
(4) in clamper entrance and rock core contact site set baffling device, stop injection fluid to flow into, hyposmosis
Layer, to simulate the machine plugging in actual pit shaft, the positive injection slug A profile control agent 0.25PV into rock core, record injection is adjusted
Pressure when cuing open agent, stands 24 hours stand-by, baffling devices in releasing clamper；
(5) water drive is carried out with 2mL/min speed, record outlet brings out the first breakthrough pressure when dripping, and treats that pressure is steady
The time recording pressure and flow；
(6) whole experiment is carried out in the case of 30 DEG C of constant temperature, is permeated after calculating original permeability according to record result, block up
Rate, sealing ratiod, breakthrough pressure gradient, resistance coefficient.
7th, sealing characteristics evaluates such as following table
Permeability is five layers of non-average rock core overall permeability before stifled, from the above in can draw, slug A profile control agents pair
Substantially, the hypertonic band in middle part has formed firm closure for five layers of non-average rock core profile control effect, in ooze, hypotonic band still has mobility,
Illustrate that the profile control agent and simulation source water combination profile control effect are obvious, and seepage channel is left to be subsequently implanted into slug B.
8th, oil-displacement capacity test operating procedure is as follows：
(1) rock core to be used is put into 70 DEG C of insulating boxs and dried to constant weight, weighed its quality after taking out cooling, be designated as
m3；
(2) rock core after drying is put into saturation in vacuum pumping device and configures water, during the bubble-free generation of observation core surface
Stop pumping, surface water is removed into rock core taking-up wiping, weighed, quality is designated as m4；
(3) with 1.5mL/min speed into rock core saturation crude oil, be driven to the port of export no longer water outlet when termination of pumping, record is tired
Count water yield, stand 4 hours it is stand-by；
(4) rock core of the complete crude oil of saturation is put into core holding unit, whole process experiment is carried out in the case of 30 DEG C of constant temperature, with
2mL/min speed carries out water drive oil, be driven to the port of export it is no longer fuel-displaced when termination of pumping, record oil pump capacity and recovery ratio；
(5) in clamper entrance and rock core contact site set baffling device, stop injection fluid to flow into, hyposmosis
Layer, to simulate the machine plugging in actual pit shaft, with 0.9mL/min speed forward direction injection slug A profile control agent 0.2PV, note
Pressure when recording injection profile agent, stands 36 hours stand-by, baffling devices in releasing clamper, is driven then to positive injection in rock core
For water 0.15PV, the positive injection slug B0.2PV into rock core；
(6) positive water drive experiment is carried out, stops experiment when being driven to aqueous 98%, records oil pump capacity, and it is final to calculate rock core
Recovery ratio value.
9th, oil-displacement capacity evaluates such as following table：
Learnt from above-mentioned data, profile control agent is prepared using simulation source water, displacement is carried out in the case of 30 DEG C of oil reservoir of simulation
Five layers of heterogeneous core are implemented after profile control by experiment, have improved rock core anisotropism, improve recovery ratio 27.65%, illustrate this hair
Bright profile control agent can improve Reservoir Heterogeneity, and profile control effect is obvious.
Embodiment two：
1st, profile control agent application method：(1) sudden and violent oxygen processing is carried out to preparing water first, content of oxygen dissolved in water reduction will be prepared
To below 3mg/L；(2) under the conditions of 35 DEG C of temperature, medicament is added to preparing in water, at the uniform velocity stirs 5 hours, obtains profile control agent；(3)
Profile control agent is directly injected into rock core after the completion of preparation.
2nd, water is prepared, is 8000mg/L by adding NaCl into distilled water and adjusting to salinity, to simulate actual life
The oilfield sewage used in production.
3rd, concrete medicament application amount is：
Slug A：Complex polymer is made up of the partially hydrolyzed polyacrylamide (PHPA) of three kinds of different molecular quality, molecular mass point
Wei not 1000*104、1500*104、2000*104, its mass ratio is 35：45：20, Complex polymer, chromium acetate, alchlor,
Sodium sulfite, triethanolamine, sodium potassium tartrate tetrahydrate mass ratio are 0.2%：0.1%：0.1%：0.3%：0.1%：0.1%, it is remaining
Component is preparation water.
Slug B：Cocoanut fatty acid diethanolamide, DTAC, Cocoamidopropyl betaine
Mass ratio is 0.5%：1%：0.5%, remaining components are preparation water.
4th, specific rock core manufacture scale is as follows：
Experiment rock core is quartz sand epoxy resin cementitious five layers of heterogeneous artificial cores, and specific size is 4.5cm*
4.5cm*30cm, from top to bottom perm-plug method is respectively 500*10-3μm2、1000*10-3μm2、2000*10-3μm2、1000*
10-3μm2、500*10-3μm2, compound rhythm oil reservoir is simulated by heterogeneous core.
5th, displacement oil is viscosity 32mPa.s in the case of crude oil, 50 DEG C.
6th, sealing characteristics test operating procedure is as follows：
(1) rock core to be used is put into 70 DEG C of insulating boxs and dried to constant weight, weighed its quality after taking out cooling, be designated as
m5；
(2) rock core after drying is put into saturation in vacuum pumping device and prepares water, during the bubble-free generation of observation core surface
Stop pumping, surface water is removed into rock core taking-up wiping, weighed, quality is designated as m6；
(3) rock core that saturation is configured into water is put into core holding unit, plus confined pressure 4MPa, then with 2mL/min speed
Into rock core, injection configuration water, records the pressure and flow when pressure stability；
(4) in clamper entrance and rock core contact site set baffling device, stop injection fluid to flow into, hyposmosis
Layer, to simulate the machine plugging in actual pit shaft, into rock core, positive injection slug A profile control agent 0.3PV, record injection profile
Pressure during agent, stands 48 hours stand-by, baffling devices in releasing clamper；
(5) water drive is carried out with 2mL/min speed, record outlet brings out the first breakthrough pressure when dripping, and treats that pressure is steady
The time recording pressure and flow；
(6) whole experiment is carried out in the case of 50 DEG C of constant temperature, is permeated after calculating original permeability according to record result, block up
Rate, sealing ratiod, breakthrough pressure gradient, resistance coefficient.
7th, sealing characteristics evaluates such as following table
Permeability is five layers of non-average rock core overall permeability before stifled, from the above in can draw, slug A profile control agents pair
Substantially, the hypertonic band in middle part has formed firm closure for five layers of non-average rock core profile control effect, in ooze, hypotonic band still has mobility,
Illustrate that the profile control agent is obvious with simulating oil field produced water combination profile control effect, and seepage channel is left to be subsequently implanted into slug B.
8th, oil-displacement capacity test operating procedure is as follows：
(1) rock core to be used is put into 70 DEG C of insulating boxs and dried to constant weight, weighed its quality after taking out cooling, be designated as
m7；
(2) rock core after drying is put into saturation in vacuum pumping device and configures water, during the bubble-free generation of observation core surface
Stop pumping, surface water is removed into rock core taking-up wiping, weighed, quality is designated as m8；
(3) with 1.5mL/min speed into rock core saturation crude oil, be driven to the port of export no longer water outlet when termination of pumping, record is tired
Count water yield, stand 4 hours it is stand-by；
(4) rock core of the complete crude oil of saturation is put into core holding unit, whole process experiment is carried out in the case of 50 DEG C of constant temperature, with
2mL/min speed carries out water drive oil, be driven to the port of export it is no longer fuel-displaced when termination of pumping, record oil pump capacity and recovery ratio；
(5) in clamper entrance and rock core contact site set baffling device, stop injection fluid to flow into, hyposmosis
Layer, to simulate the machine plugging in actual pit shaft, with 0.9mL/min speed forward direction injection slug A profile control agent 0.25PV, note
Record injection pressure, stands 36 hours stand-by, baffling devices in releasing clamper, then to positive injection driven water-replacing in rock core
0.15PV, the positive injection slug B0.25PV into rock core；
(6) positive water drive experiment is carried out, stops experiment when being driven to aqueous 98%, records oil pump capacity, and it is final to calculate rock core
Recovery ratio value.
9th, oil-displacement capacity evaluates such as following table：
Learnt from above-mentioned data, profile control agent is prepared using simulating oil field produced water, driven in the case of 50 DEG C of oil reservoir of simulation
For experiment, five layers of heterogeneous core are implemented after profile control, have improved rock core anisotropism, recovery ratio 26.16% is improved, illustrate this
Invention profile control agent can improve Reservoir Heterogeneity, and profile control effect is obvious.
Embodiment three：
1st, profile control agent application method：(1) sudden and violent oxygen processing is carried out to preparing water first, content of oxygen dissolved in water reduction will be prepared
To below 3mg/L；(2) under the conditions of 55 DEG C of temperature, medicament is added to preparing in water, at the uniform velocity stirs 6 hours, obtains profile control agent；(3)
Profile control agent is directly injected into rock core after the completion of preparation.
2nd, water is prepared, by adding solubility salt regulating mineralization degree of injected oil into distilled water, final salinity is 35000mg/
L, the oilfield sewage used to simulate in actual production.
3rd, concrete medicament application amount is：
Slug A：Complex polymer is made up of the partially hydrolyzed polyacrylamide (PHPA) of three kinds of different molecular quality, molecular mass point
Wei not 1000*104、1500*104、2000*104, its mass ratio is 35：45：20, Complex polymer, chromium acetate, alchlor,
Sodium sulfite, triethanolamine, sodium potassium tartrate tetrahydrate mass ratio are 0.3%：0.2%：0.2%：0.4%：0.2%：0.2%, it is remaining
Component is preparation water.
Slug B：Cocoanut fatty acid diethanolamide, DTAC, Cocoamidopropyl betaine
Mass ratio is 1%：2%：1%, remaining components are preparation water.
4th, specific rock core manufacture scale is as follows：
Experiment rock core is quartz sand epoxy resin cementitious five layers of heterogeneous artificial cores, and specific size is 4.5cm*
4.5cm*30cm, from top to bottom perm-plug method is respectively 500*10-3μm2、1000*10-3μm2、2000*10-3μm2、1000*
10-3μm2、500*10-3μm2, compound rhythm oil reservoir is simulated by heterogeneous core.
5th, displacement oil is viscosity 25.3mPa.s in the case of crude oil, 70 DEG C.
6th, sealing characteristics test operating procedure is as follows：
(1) rock core to be used is put into 70 DEG C of insulating boxs and dried to constant weight, weighed its quality after taking out cooling, be designated as
m9；
(2) rock core after drying is put into saturation in vacuum pumping device and prepares water, during the bubble-free generation of observation core surface
Stop pumping, surface water is removed into rock core taking-up wiping, weighed, quality is designated as m10；
(3) rock core that saturation is configured into water is put into core holding unit, plus confined pressure 4MPa, then with 2mL/min speed
Into rock core, injection configuration water, records the pressure and flow when pressure stability；
(4) in clamper entrance and rock core contact site set baffling device, stop injection fluid to flow into, hyposmosis
Layer, to simulate the machine plugging in actual pit shaft, into rock core, positive injection slug A profile control agent 0.3PV, record injection profile
Pressure during agent, stands 36 hours stand-by, baffling devices in releasing clamper；
(5) water drive is carried out with 2mL/min speed, record outlet brings out the first breakthrough pressure when dripping, and treats that pressure is steady
The time recording pressure and flow；
(6) whole experiment is carried out in the case of 70 DEG C of constant temperature, is permeated after calculating original permeability according to record result, block up
Rate, sealing ratiod, breakthrough pressure gradient, resistance coefficient.
7th, sealing characteristics evaluates such as following table
Permeability is five layers of non-average rock core overall permeability before stifled, from the above in can draw, slug A profile control agents pair
Substantially, the hypertonic band in middle part has formed firm closure for five layers of non-average rock core profile control effect, in ooze, hypotonic band still has mobility,
Illustrate that the profile control agent is obvious with simulating oil field produced water combination profile control effect, and seepage channel is left to be subsequently implanted into slug B.
8th, oil-displacement capacity test operating procedure is as follows：
(1) rock core to be used is put into 70 DEG C of insulating boxs and dried to constant weight, weighed its quality after taking out cooling, be designated as
m11；
(2) rock core after drying is put into saturation in vacuum pumping device and configures water, during the bubble-free generation of observation core surface
Stop pumping, surface water is removed into rock core taking-up wiping, weighed, quality is designated as m12；
(3) with 1.5mL/min speed into rock core saturation crude oil, be driven to the port of export no longer water outlet when termination of pumping, record is tired
Count water yield, stand 4 hours it is stand-by；
(4) rock core of the complete crude oil of saturation is put into core holding unit, whole process experiment is carried out in the case of 70 DEG C of constant temperature, with
2mL/min speed carries out water drive oil, be driven to the port of export it is no longer fuel-displaced when termination of pumping, record oil pump capacity and recovery ratio；
(5) in clamper entrance and rock core contact site set baffling device, stop injection fluid to flow into, hyposmosis
Layer, to simulate the machine plugging in actual pit shaft, with 0.9mL/min speed forward direction injection slug A profile control agent 0.3PV, note
Record injection pressure, stands 36 hours stand-by, baffling devices in releasing clamper, then to positive injection driven water-replacing in rock core
0.15PV, the positive injection slug B0.3PV into rock core；
(6) positive water drive experiment is carried out, stops experiment when being driven to aqueous 98%, records oil pump capacity, and it is final to calculate rock core
Recovery ratio value.
9th, oil-displacement capacity evaluates such as following table：
Learnt from above-mentioned data, profile control agent is prepared using simulating oil field produced water, driven in the case of 70 DEG C of oil reservoir of simulation
For experiment, five layers of heterogeneous core are implemented after profile control, have improved rock core anisotropism, recovery ratio 28.4% is improved, illustrate this
Invention profile control agent can improve Reservoir Heterogeneity, and profile control effect is obvious.
Claims (6)
1. the double slug type profile control agents of a kind of compound rhythm oil reservoir, it is characterised in that including slug A profile control agents and slug B；
Slug A profile control agents include Complex polymer and additive；Wherein, Complex polymer is by the part of three kinds of different molecular quality
Hydrolyzed polyacrylamide is constituted, and molecular mass is respectively 1000*104、1500*104、2000*104, its mass ratio is 35：45：
20；Additive includes chromium acetate, alchlor, sodium sulfite, triethanolamine, sodium potassium tartrate tetrahydrate；In slug A profile control agents, compounding
Polymer quality ratio is 0.2%-0.3%, and chromium acetate mass ratio is 0.1%-0.2%, and alchlor mass ratio is 0.1%-
0.2%, sodium sulfite mass ratio is 0.3%-0.4%, and triethanolamine mass ratio is 0.1%-0.2%, sodium potassium tartrate tetrahydrate quality
Than for 0.1%-0.2%, remaining components is prepare water；And
Slug B includes cocoanut fatty acid diethanolamide, DTAC, Cocoamidopropyl betaine；
In slug B, cocoanut fatty acid diethanolamide mass ratio is 0.5%-1%, and DTAC mass ratio is
1%-2%, Cocoamidopropyl betaine mass ratio is 0.5%-1%, and remaining components are preparation water.
2. the double slug type profile control agents of a kind of compound rhythm oil reservoir as claimed in claim 1, it is characterised in that the slug A is adjusted
Complex polymer in agent, chromium acetate, alchlor, sodium sulfite, triethanolamine, sodium potassium tartrate tetrahydrate mass ratio are cutd open for 0.22%-
0.28%：0.12%-0.18%：0.12%-0.18%：0.33%-0.37%：0.12%-0.18%：0.12%-0.18%,
Remaining components are preparation water.
3. the double slug type profile control agents of a kind of compound rhythm oil reservoir as claimed in claim 1, it is characterised in that the slug A is adjusted
It is 0.25% to cut open Complex polymer in agent, chromium acetate, alchlor, sodium sulfite, triethanolamine, sodium potassium tartrate tetrahydrate mass ratio：
0.15%：0.15%：0.35%：0.15%：0.15%, remaining components are preparation water.
4. the double slug type profile control agents of a kind of compound rhythm oil reservoir as claimed in claim 1, it is characterised in that in the slug B
Cocoanut fatty acid diethanolamide, DTAC, Cocoamidopropyl betaine mass ratio are 0.6%-
0.9%：1.2%-1.8%：0.6%-0.9%, remaining components are preparation water.
5. the double slug type profile control agents of a kind of compound rhythm oil reservoir as claimed in claim 1, it is characterised in that in the slug B
Cocoanut fatty acid diethanolamide, DTAC, Cocoamidopropyl betaine mass ratio are 0.75%：
1.5%：0.75%, remaining components are preparation water.
6. the application method of the double slug type profile control agents of a kind of compound rhythm oil reservoir, it is characterised in that comprise the following steps：
Step 1. combines oil field actual production design data profile control agent injection rate, injection rate and other injection parameters；
Step 2. pair prepares water and carries out sudden and violent oxygen processing, prepares water and uses oilfield sewage or source water, will prepare oxygen in water and contains
Amount is reduced to below 3mg/L；
Under the conditions of 15-55 DEG C of step 3. temperature range, in the mixing container, medicament is added to preparing in water, at the uniform velocity stir 4-6 small
When, obtain profile control agent；
Step 4. is carried out to water injection well in machine plugging operation, the compound rhythm oil reservoir of closure, hypotonic band, enters injection profile agent
The hypertonic band in middle part；
Water injection well is connected by step 5. with stainless steel and supercharging device, starts supercharging device, and slug A profile control agents are injected into oil
Hide, injection rate reaches that static 24-48 hours makes the abundant plastic of profile control agent after preset range；
Step 6. releases machine plugging, injects driven water-replacing 0.15PV, injects slug B, then carries out follow-up note and adopts operation.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060096758A1 (en) * | 2004-11-10 | 2006-05-11 | Bj Services Company | Method of treating an oil or gas well with biodegradable low toxicity fluid system |
| EP2078066A2 (en) * | 2006-08-02 | 2009-07-15 | Kemira Chemicals Inc. | Biocide for well stimulation and treatment fluids |
| CN102061158A (en) * | 2010-11-26 | 2011-05-18 | 华鼎鸿基采油技术服务（北京）有限公司 | Foam reinforcing polymer oil displacement agent and method |
| CN103216211A (en) * | 2012-01-18 | 2013-07-24 | 中国石油天然气股份有限公司 | Method for carrying out profile control on fracture-type oil reservoir |
| CN104514531A (en) * | 2013-09-27 | 2015-04-15 | 中国石油天然气股份有限公司 | Method for profile control and water shutoff in two-fluid process for three-low sandstone reservoir |
| CN105840156A (en) * | 2016-04-06 | 2016-08-10 | 大庆金军石油科技开发有限公司 | Multi-slug composite profile control and oil displacement process |
| CN106801597A (en) * | 2015-11-26 | 2017-06-06 | 中国石油化工股份有限公司 | Heavy crude reservoir combined type flooding method and displacement composition |
-
2017
- 2017-08-06 CN CN201710663638.7A patent/CN107288592A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060096758A1 (en) * | 2004-11-10 | 2006-05-11 | Bj Services Company | Method of treating an oil or gas well with biodegradable low toxicity fluid system |
| EP2078066A2 (en) * | 2006-08-02 | 2009-07-15 | Kemira Chemicals Inc. | Biocide for well stimulation and treatment fluids |
| CN102061158A (en) * | 2010-11-26 | 2011-05-18 | 华鼎鸿基采油技术服务（北京）有限公司 | Foam reinforcing polymer oil displacement agent and method |
| CN103216211A (en) * | 2012-01-18 | 2013-07-24 | 中国石油天然气股份有限公司 | Method for carrying out profile control on fracture-type oil reservoir |
| CN104514531A (en) * | 2013-09-27 | 2015-04-15 | 中国石油天然气股份有限公司 | Method for profile control and water shutoff in two-fluid process for three-low sandstone reservoir |
| CN106801597A (en) * | 2015-11-26 | 2017-06-06 | 中国石油化工股份有限公司 | Heavy crude reservoir combined type flooding method and displacement composition |
| CN105840156A (en) * | 2016-04-06 | 2016-08-10 | 大庆金军石油科技开发有限公司 | Multi-slug composite profile control and oil displacement process |
Non-Patent Citations (2)
| Title |
|---|
| 杜巧云等: "《表面活性剂基础及应用》", 31 August 1996 * |
| 白玉等: "《井下实用工具手册》", 31 August 2007 * |
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Application publication date: 20171024 |