CN107338035A - A kind of compound rhythm oil reservoir chromium aluminium ion Compositional type profile control agent and its application method - Google Patents
A kind of compound rhythm oil reservoir chromium aluminium ion Compositional type profile control agent and its application method Download PDFInfo
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- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 106
- 230000033764 rhythmic process Effects 0.000 title claims abstract description 47
- 150000001875 compounds Chemical class 0.000 title claims abstract description 43
- QQHSIRTYSFLSRM-UHFFFAOYSA-N alumanylidynechromium Chemical compound [Al].[Cr] QQHSIRTYSFLSRM-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 97
- 229920000642 polymer Polymers 0.000 claims abstract description 44
- 238000004519 manufacturing process Methods 0.000 claims abstract description 12
- 238000002156 mixing Methods 0.000 claims abstract description 7
- 239000007924 injection Substances 0.000 claims description 43
- 238000002347 injection Methods 0.000 claims description 43
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims description 30
- WYYQVWLEPYFFLP-UHFFFAOYSA-K chromium(3+);triacetate Chemical compound [Cr+3].CC([O-])=O.CC([O-])=O.CC([O-])=O WYYQVWLEPYFFLP-UHFFFAOYSA-K 0.000 claims description 25
- 238000002360 preparation method Methods 0.000 claims description 24
- 229920002401 polyacrylamide Polymers 0.000 claims description 15
- 235000010265 sodium sulphite Nutrition 0.000 claims description 15
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 14
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims description 14
- VZOPRCCTKLAGPN-ZFJVMAEJSA-L potassium;sodium;(2r,3r)-2,3-dihydroxybutanedioate;tetrahydrate Chemical compound O.O.O.O.[Na+].[K+].[O-]C(=O)[C@H](O)[C@@H](O)C([O-])=O VZOPRCCTKLAGPN-ZFJVMAEJSA-L 0.000 claims description 13
- 229940074446 sodium potassium tartrate tetrahydrate Drugs 0.000 claims description 13
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 12
- 229910052760 oxygen Inorganic materials 0.000 claims description 12
- 239000001301 oxygen Substances 0.000 claims description 12
- 239000000654 additive Substances 0.000 claims description 9
- 230000000996 additive effect Effects 0.000 claims description 9
- 239000003814 drug Substances 0.000 claims description 8
- 239000011837 N,N-methylenebisacrylamide Substances 0.000 claims description 7
- -1 alchlor Chemical compound 0.000 claims description 7
- ZIUHHBKFKCYYJD-UHFFFAOYSA-N n,n'-methylenebisacrylamide Chemical compound C=CC(=O)NCNC(=O)C=C ZIUHHBKFKCYYJD-UHFFFAOYSA-N 0.000 claims description 6
- 229920003023 plastic Polymers 0.000 claims description 6
- 239000004033 plastic Substances 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 5
- 238000013461 design Methods 0.000 claims description 4
- 239000010865 sewage Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 230000003068 static effect Effects 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 238000013329 compounding Methods 0.000 claims 2
- 238000011084 recovery Methods 0.000 abstract description 20
- 230000035699 permeability Effects 0.000 abstract description 18
- 239000003431 cross linking reagent Substances 0.000 abstract description 7
- 230000015572 biosynthetic process Effects 0.000 abstract description 5
- 238000012546 transfer Methods 0.000 abstract description 4
- 230000007812 deficiency Effects 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 88
- 239000011435 rock Substances 0.000 description 70
- 239000010410 layer Substances 0.000 description 30
- 238000002474 experimental method Methods 0.000 description 20
- 238000005086 pumping Methods 0.000 description 18
- 230000000694 effects Effects 0.000 description 16
- 238000006073 displacement reaction Methods 0.000 description 14
- 239000010779 crude oil Substances 0.000 description 9
- 238000007789 sealing Methods 0.000 description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 238000001816 cooling Methods 0.000 description 6
- 238000001035 drying Methods 0.000 description 6
- 238000011156 evaluation Methods 0.000 description 6
- 239000012530 fluid Substances 0.000 description 6
- 238000011017 operating method Methods 0.000 description 6
- 239000002352 surface water Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 230000000704 physical effect Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 239000006004 Quartz sand Substances 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 239000012153 distilled water Substances 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 229940123973 Oxygen scavenger Drugs 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 239000002270 dispersing agent Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 1
- 241000237858 Gastropoda Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000033558 biomineral tissue development Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 239000013256 coordination polymer Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000015784 hyperosmotic salinity response Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 229920000554 ionomer Polymers 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- BITYAPCSNKJESK-UHFFFAOYSA-N potassiosodium Chemical compound [Na].[K] BITYAPCSNKJESK-UHFFFAOYSA-N 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
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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
- C09K8/50—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
-
- 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
- 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
-
- 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
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Abstract
A kind of compound rhythm oil reservoir chromium aluminium ion Compositional type profile control agent 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, has the strong characteristic of high viscosity, shear resistant, can implement firm closure to high permeability formation in the middle part of oil reservoir；Rearmounted slug mixing low molecule quality Complex polymer and chromium aluminium ion crosslinking agent, with the strong characteristic of low viscosity, mobility, inject oil reservoir after preposed attributives effectively block, to being oozed in oil reservoir, low-permeability layer implement transfer drive, with reduce residual oil content in oil reservoir, increase injectivity index；Improve Reservoir Heterogeneity by way of double slug combinations, increase sequent water flooding sweep efficiency, suppress compound rhythm oil reservoir region of bypassed oil and 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 compound rhythm oil reservoir chromium aluminium ion Compositional type profile control agent and its application method, the profile control agent can
Improve reservoir 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 the main reason for influenceing remaining oil distribution；Changed according to the microcosmic Petrographic Features on reservoir longitudinal direction
Rule, it 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 reduce, 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
The control of top and the bottom cadence types, during water flooding, show as that middle part is advanced by leaps and bounds or more uniform waterline promotes type,
It is mostly 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.
For a large amount of compound actual recoverys percent of reserves of rhythm oil reservoir 10%~20%, 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 high permeability formation 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 high permeability formation, and
In, the water-driven situation of low-permeability layer it is very poor；Due to interlayer contradiction, most moveable oils of middle and high infiltration layer are in hand-hole
Produced before gap volume 1PV, influence of the injection water later more than 1PV to improving recovery ratio amplitude is relatively small；Remaining oil master
Wanting branch, permeability grade is bigger, and low-permeability layer oil displacement efficiency is lower, and the ratio of remaining oil branch is bigger in hypotonic interval.
Recovery efficiency technique demand is improved for compound rhythm oil reservoir, the present invention designs a kind of chromium aluminium ion Compositional type profile control
Agent, overcome it is above-mentioned during water drive the drawbacks of.
The content of the invention
It is an object of the invention to provide a kind of compound rhythm oil reservoir chromium aluminium ion Compositional type profile control agent and its application method,
Characterized in that, inject compound rhythm oil reservoir by double slug forms, preposed attributives mixing high molecule mass Complex polymer and
Chromium aluminium ion crosslinking agent, there is the strong characteristic of high viscosity, shear resistant, firm closure can be implemented to high permeability formation in the middle part of oil reservoir；Afterwards
Slug mixing low molecule quality Complex polymer and chromium aluminium ion crosslinking agent are put, there is the strong characteristic of low viscosity, mobility, preceding
Put slug effectively closure after inject oil reservoir, to being oozed in oil reservoir, low-permeability layer implement transfer drive, with reduce residual oil content in oil reservoir, increase
Add injectivity index；Improve Reservoir Heterogeneity by way of double slug combinations, increase sequent water flooding sweep efficiency, suppress compound
Rhythm oil reservoir region of bypassed oil is formed, to improve traditional oil production method to drawbacks such as the compound low, deficiencies in economic performance of rhythm oil recovery.
To reach above-mentioned purpose, the present invention adopts the following technical scheme that.
It is an object of the invention to provide a kind of compound rhythm oil reservoir chromium aluminium ion Compositional type profile control agent and its application method,
Its main component is：Partially hydrolyzed polyacrylamide (PHPA) relative molecular mass is respectively 500*104、800*104、1000*104、
1500*104、2000*104, chromium acetate, alchlor, sodium sulfite, triethanolamine, sodium potassium tartrate tetrahydrate, N, N- di-2-ethylhexylphosphine oxides third
Acrylamide, calgon；For compound rhythm oil reservoir, double slug formula profile control agents are designed, below with slug A profile control agents and slug
B profile control agents are 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) forms, 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 being preparation water for 0.1%-0.2%, remaining components.
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 compounds, and forms the polymer with matrix type cross-linked structure, with colloid physical property is stable, the broken glue time is long, salt tolerant
Property etc. effect, firm closure can be implemented to hypertonic band in the middle part of compound rhythm oil reservoir；Triethanolamine uses as auxiliary crosslinking agent, increases
Strong profile control agent stability, and increase broken glue time；Sodium potassium tartrate tetrahydrate uses as dispersant, can make Complex polymer system point
More uniformly spread between son, increase molecular coil periphery absorption affinity, so as to improve profile control agent in the middle part of compound rhythm oil reservoir it is hypertonic
The plugging effect of band；Sodium sulfite can suppress oxygen in process for preparation and in oil reservoir to viscosity reduction caused by profile control agent as oxygen scavenger
Effect, increase 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 the compound rhythm
The anisotropism of oil reservoir so that be subsequently implanted into slug B profile control agents into compound rhythm oil reservoir, less permeable layer, it is double so as to be formed
Slug acts synergistically.
Slug B profile control agents include Complex polymer and additive；Wherein, Complex polymer is by three kinds of different molecular quality
Partially hydrolyzed polyacrylamide (PHPA) forms, and molecular mass is respectively 500*104、800*104、1000*104, its mass ratio is 50：35：
15；Additive includes chromium acetate, alchlor, N,N methylene bis acrylamide, calgon；It is multiple in slug B profile control agents
It is 0.05%-0.15% with polymer quality ratio, chromium acetate mass ratio is 0.05%-0.1%, and alchlor mass ratio is
0.02%-0.07%, N, N- methylene-bisacrylamide mass ratio are 0.02%-0.07%, and calgon mass ratio is
0.1%-0.15%, remaining components are preparation water.
Preferably, in slug B profile control agents, Complex polymer, chromium acetate, alchlor, N, N- methylene-bisacrylamides,
Calgon mass ratio is 0.07%-0.13%：0.06%-0.09%：0.03%-0.06%：0.03%-0.06%：
0.11%-0.14%, remaining components are preparation water.
It is highly preferred that in slug B profile control agents, Complex polymer, chromium acetate, alchlor, N, N- methylene bisacrylamide acyls
Amine, calgon mass ratio are 0.1%：0.075%：0.045%：0.045%：0.12%, remaining components are preparation water.
Slug B profile control agent main function mechanism is to be crosslinked by mixing low molecule quality Complex polymer with chromium aluminium ion
Agent, there is the strong characteristic of low viscosity, mobility, inject oil reservoir after preposed attributives effectively block, to being oozed in oil reservoir, low-permeability layer it is real
Transfer drive is applied, to reduce residual oil content in oil reservoir, increase oil reservoir injectivity index；N in slug B profile control agents, N- methylene bisacrylamides
Acid amides can increase the work of polyacrylamide molecular coil peripheral groups as a kind of auxiliary type water shutoff agent and auxiliary type crosslinking agent
Property so that slug B profile control agents are in contact partly with oil reservoir duct has larger viscosity, is oozed so as to increase it in, low-permeability layer
Holdup time；Calgon plays dispersant effect, can make Complex polymer system is intermolecular to more uniformly spread, strengthen it
Mobility, oozed so as to improve slug B profile control agents in, the oil displacement efficiency in low-permeability layer, to reach the purpose of transfer drive；In slug A
After forming effectively closure, slug B is injected into oil reservoir, oozed in can entering, low-permeability layer carries out polymer flooding, to be oozed in reduction, hypotonic
Layer residual oil blocks to caused by oil reservoir, strengthens its flow conductivity；Improve Reservoir Heterogeneity by way of double slug combinations,
Increase sequent water flooding sweep efficiency, suppress compound rhythm oil reservoir region of bypassed oil and formed, and traveling one is entered to oil reservoir by sequent water flooding
Step exploitation.
A kind of application method of compound rhythm oil reservoir chromium aluminium ion Compositional type profile control agent, it is characterised in that including following step
Suddenly：
Step 1. combines oil field actual production design data profile control agent injection rate, injection rate and other injection parameters；
Step 2. carries out sudden and violent oxygen processing to preparing water, prepares water and uses oilfield sewage or source water, is dissolved preparing in water
Oxygen content 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 hours, obtain profile control agent；
Step 4. carries out machine plugging operation to water injection well, blocks in compound rhythm oil reservoir, 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, after injection rate reaches preset range static 24-48 hours make the abundant plastic of profile control agent；
Step 6. releases machine plugging, injects driven water-replacing 0.2PV, injects slug B profile control agents, and injection rate reaches preset range
Static 24-48 hours make the abundant plastic of profile control agent afterwards, then carry out follow-up note and adopt 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, wait 24-
Make within 48 hours the abundant plastic of slug A profile control agents, then to driven water-replacing 0.2PV is injected in oil reservoir or rock core, then to oil reservoir or rock
Slug B profile control agent 0.2-0.4PV are injected in the heart, wait 24-48 hours to make the abundant plastic of slug B profile control agents, are then carried out follow-up
Note adopts operation.
The present invention the advantage is that relative to prior art：
1st, improve recovery efficiency technique demand for compound rhythm oil reservoir, the present invention design a kind of compound rhythm oil reservoir chromium aluminium from
Sub- Compositional type profile control agent, it is characterised in that Complex polymer type profile control agent slug A, pass through three kinds of high molecule mass partial hydrolysis
Polyacrylamide is compounded, and forms the Compositional type polymer with molecular coil form, can be to high in the middle part of compound rhythm oil reservoir
Ooze band and implement firm closure.
2nd, by adding chromium acetate, alchlor is used as crosslinking agent, can form matrix type cross-linked structure, there is colloid physical property
The effects such as stable, broken glue time length, salt tolerance.
3rd, sodium sulfite can effectively suppress oxygen in process for preparation and in oil reservoir to drop caused by profile control agent as oxygen scavenger
Viscous effect, strengthen the stability of profile control agent.
4th, the additive applied in the mode of Complex polymer and formula can increase the salinity adaptability of polymeric system
By force, it is suitable for salinity 500mg/L-35000mg/L preparation water.
5th, the present invention by double slugs inject form, improve compound rhythm Reservoir Heterogeneity, recovery percent of reserves it is low, water suction refer to
The low and water injection pressure of number 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 500*104、800*104、1000*104、1500*104、2000*104, effective mass fraction is 90%；Chromium acetate is
Shandong West Asia chemical industry Co., Ltd produces, and analysis is pure；Alchlor produces for Jining Hong Ming chemical reagent Co., Ltd, point
Analyse pure；Sodium sulfite produces for Tianjin Zhi Yuan chemical reagent Co., Ltd, and analysis is pure；Triethanolamine is Nanjing chemical reagent stock
The production of part Co., Ltd, analyzes pure AR；Sodium potassium tartrate tetrahydrate produces for Dezhou Run Xin laboratory apparatus Co., Ltd, analyzes pure AR；N,
N- methylene-bisacrylamides produce for Nanjing chemical reagent limited company, CP, and 98%；Calgon is that Shandong ancient cooking vessel is glad
Bio tech ltd produces, and 98%.
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, will prepare content of oxygen dissolved in water reduces
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 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 0.25%：0.15%：0.15%：0.35%：0.15%：
0.15%, remaining components are preparation water.
Slug B：Complex polymer is made up of the partially hydrolyzed polyacrylamide (PHPA) of three kinds of different molecular quality, molecular mass point
Wei not 500*104、800*104、1000*104, its mass ratio is 50：35：15；Complex polymer, chromium acetate, alchlor, N,
N- methylene-bisacrylamides, calgon mass ratio are 0.1%：0.075%：0.045%：0.045%：0.12%, it is remaining
The following group is divided into 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 crude oil, viscosity 37mPa.s in the case of 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 is 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, when observation core surface bubble-free generates
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 to water is put into core holding unit, adds confined pressure 4MPa, then with 2mL/min speed
Into rock core, injection configuration water, records the pressure and flow when pressure stability；
(4) baffling device is set in clamper entrance and rock core contact site, stopped in injection fluid inflow, 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, which injects, to be adjusted
Pressure when cuing open agent, stand 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 evaluation 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
Five layers of non-average rock core profile control effect are obvious, and the hypertonic band in middle part has formed firm closure, 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 is 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, when observation core surface bubble-free generates
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 being 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) baffling device is set in clamper entrance and rock core contact site, stopped in injection fluid inflow, hyposmosis
Layer, to simulate the machine plugging in actual pit shaft, with the positive injection slug A profile control agent 0.2PV of 0.9mL/min speed, note
Pressure when recording injection profile agent, stand 36 hours it is stand-by, baffling device in clamper is released, then to injecting driven water-replacing in rock core
0.2PV, the positive injection slug B profile control agent 0.2PV into rock core, stand 24 hours it is stand-by；
(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 evaluation such as following table：
Learnt from above-mentioned data, prepare profile control agent using simulation source water, displacement is carried out in the case of 30 DEG C of oil reservoir is simulated
Experiment, after implementing profile control to five layers of heterogeneous core, rock core anisotropism is improved, has improved recovery ratio 28.82%, 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, will prepare content of oxygen dissolved in water reduces
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：Complex polymer is made up of the partially hydrolyzed polyacrylamide (PHPA) of three kinds of different molecular quality, molecular mass point
Wei not 500*104、800*104、1000*104, its mass ratio is 50：35：15；Complex polymer, chromium acetate, alchlor, N,
N- methylene-bisacrylamides, calgon mass ratio are 0.05%：0.05%：0.02%：0.02%：0.1%, remaining group
It is divided into 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 crude oil, viscosity 32mPa.s in the case of 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 is 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, when observation core surface bubble-free generates
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 to water is put into core holding unit, adds confined pressure 4MPa, then with 2mL/min speed
Into rock core, injection configuration water, records the pressure and flow when pressure stability；
(4) baffling device is set in clamper entrance and rock core contact site, stopped in injection fluid inflow, 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, stand 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 evaluation 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
Five layers of non-average rock core profile control effect are obvious, and the hypertonic band in middle part has formed firm closure, in ooze, hypotonic band still has mobility,
Illustrate that the profile control agent and simulating oil field produced 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 is 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, when observation core surface bubble-free generates
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 being 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) baffling device is set in clamper entrance and rock core contact site, stopped in injection fluid inflow, hyposmosis
Layer, to simulate the machine plugging in actual pit shaft, with the positive injection slug A profile control agent 0.25PV of 0.9mL/min speed, note
Record injection pressure, stand 36 hours it is stand-by, release clamper in baffling device, then in rock core inject driven water-replacing 0.2PV, to
Positive injection slug B profile control agent 0.3PV in rock core, stand 36 hours it is stand-by；
(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 evaluation such as following table：
Learnt from above-mentioned data, prepare profile control agent using simulating oil field produced water, driven in the case of 50 DEG C of oil reservoir is simulated
For experiment, after implementing profile control to five layers of heterogeneous core, rock core anisotropism is improved, has improved recovery ratio 26.5%, illustrated 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, will prepare content of oxygen dissolved in water reduces
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, to simulate the oilfield sewage used 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：Complex polymer is made up of the partially hydrolyzed polyacrylamide (PHPA) of three kinds of different molecular quality, molecular mass point
Wei not 500*104、800*104、1000*104, its mass ratio is 50：35：15；Complex polymer, chromium acetate, alchlor, N,
N- methylene-bisacrylamides, calgon mass ratio are 0.15%：0.1%：0.07%：0.07%：0.15%, remaining group
It is divided into 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 crude oil, viscosity 25.3mPa.s in the case of 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 is 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, when observation core surface bubble-free generates
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 to water is put into core holding unit, adds confined pressure 4MPa, then with 2mL/min speed
Into rock core, injection configuration water, records the pressure and flow when pressure stability；
(4) baffling device is set in clamper entrance and rock core contact site, stopped in injection fluid inflow, 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, stand 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 evaluation 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
Five layers of non-average rock core profile control effect are obvious, and the hypertonic band in middle part has formed firm closure, in ooze, hypotonic band still has mobility,
Illustrate that the profile control agent and simulating oil field produced 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 is 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, when observation core surface bubble-free generates
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 being 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) baffling device is set in clamper entrance and rock core contact site, stopped in injection fluid inflow, hyposmosis
Layer, to simulate the machine plugging in actual pit shaft, with the positive injection slug A profile control agent 0.26PV of 0.9mL/min speed, note
Record injection pressure, stand 36 hours it is stand-by, release clamper in baffling device, then in rock core inject driven water-replacing 0.2PV, to
Positive injection slug B profile control agent 0.4PV in rock core, stand 48 hours it is stand-by；
(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 evaluation such as following table：
Learnt from above-mentioned data, prepare profile control agent using simulating oil field produced water, driven in the case of 70 DEG C of oil reservoir is simulated
For experiment, after implementing profile control to five layers of heterogeneous core, rock core anisotropism is improved, has improved recovery ratio 28.5%, illustrated this
Invention profile control agent can improve Reservoir Heterogeneity, and profile control effect is obvious.
Claims (6)
1. a kind of compound rhythm oil reservoir chromium aluminium ion Compositional type profile control agent, it is characterised in that including slug A profile control agents and slug B
Profile control agent；
Slug A profile control agents include Complex polymer and additive；Wherein, Complex polymer by three kinds of different molecular quality part
Hydrolyzed polyacrylamide forms, 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 being preparation water for 0.1%-0.2%, remaining components；And
Slug B profile control agents include Complex polymer and additive；Wherein, Complex polymer by three kinds of different molecular quality part
Hydrolyzed polyacrylamide forms, and molecular mass is respectively 500*104、800*104、1000*104, its mass ratio is 50：35：15；
Additive includes chromium acetate, alchlor, N,N methylene bis acrylamide, calgon；In slug B profile control agents, compounding
Polymer quality ratio is 0.05%-0.15%, and chromium acetate mass ratio is 0.05%-0.1%, and alchlor mass ratio is
0.02%-0.07%, N, N- methylene-bisacrylamide mass ratio are 0.02%-0.07%, and calgon mass ratio is
0.1%-0.15%, remaining components are preparation water.
2. a kind of compound rhythm oil reservoir chromium aluminium ion Compositional type profile control agent as claimed in claim 1, it is characterised in that described section
Complex polymer, chromium acetate, alchlor, sodium sulfite, triethanolamine, sodium potassium tartrate tetrahydrate mass ratio are in plug A profile control agents
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. a kind of compound rhythm oil reservoir chromium aluminium ion Compositional type profile control agent as claimed in claim 1, it is characterised in that described section
Complex polymer, chromium acetate, alchlor, sodium sulfite, triethanolamine, sodium potassium tartrate tetrahydrate mass ratio are in plug A profile control agents
0.25%：0.15%：0.15%：0.35%：0.15%：0.15%, remaining components are preparation water.
4. a kind of compound rhythm oil reservoir chromium aluminium ion Compositional type profile control agent as claimed in claim 1, it is characterised in that described section
Complex polymer, chromium acetate, alchlor, N,N methylene bis acrylamide, calgon mass ratio are in plug B profile control agents
0.07%-0.13%：0.06%-0.09%：0.03%-0.06%：0.03%-0.06%：0.11%-0.14%, remaining group
It is divided into preparation water.
5. a kind of compound rhythm oil reservoir chromium aluminium ion Compositional type profile control agent as claimed in claim 1, it is characterised in that described section
Complex polymer, chromium acetate, alchlor, N,N methylene bis acrylamide, calgon mass ratio are in plug B profile control agents
0.1%：0.075%：0.045%：0.045%：0.12%, remaining components are preparation water.
6. a kind of application method of compound rhythm oil reservoir chromium aluminium ion Compositional type profile control agent, 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. carries out sudden and violent oxygen processing to preparing water, 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, it is small at the uniform velocity to stir 4-6
When, obtain profile control agent；
Step 4. carries out machine plugging operation to water injection well, blocks in compound rhythm oil reservoir, 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, after injection rate reaches preset range static 24-48 hours make the abundant plastic of profile control agent；
Step 6. releases machine plugging, injects driven water-replacing 0.2PV, injects slug B profile control agents, and injection rate reaches quiet after preset range
Only 24-48 hours make the abundant plastic of profile control agent, then carry out follow-up note and adopt operation.
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Cited By (1)
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| CN116104460A (en) * | 2023-03-02 | 2023-05-12 | 东北石油大学 | Combined profile control technology dosage design method |
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Cited By (1)
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| CN116104460A (en) * | 2023-03-02 | 2023-05-12 | 东北石油大学 | Combined profile control technology dosage design method |
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Application publication date: 20171110 |