CN106350042B - Gel channeling sealing agent, preparation method thereof and channeling sealing method - Google Patents
Gel channeling sealing agent, preparation method thereof and channeling sealing method Download PDFInfo
- Publication number
- CN106350042B CN106350042B CN201610626303.3A CN201610626303A CN106350042B CN 106350042 B CN106350042 B CN 106350042B CN 201610626303 A CN201610626303 A CN 201610626303A CN 106350042 B CN106350042 B CN 106350042B
- Authority
- CN
- China
- Prior art keywords
- envelope
- agent
- alters
- gel
- steam
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 238000007789 sealing Methods 0.000 title abstract description 10
- 230000005465 channeling Effects 0.000 title abstract description 9
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 113
- GHMLBKRAJCXXBS-UHFFFAOYSA-N resorcinol Chemical compound OC1=CC=CC(O)=C1 GHMLBKRAJCXXBS-UHFFFAOYSA-N 0.000 claims abstract description 42
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims abstract description 38
- 229920002401 polyacrylamide Polymers 0.000 claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims abstract description 21
- BGJSXRVXTHVRSN-UHFFFAOYSA-N 1,3,5-trioxane Chemical group C1OCOCO1 BGJSXRVXTHVRSN-UHFFFAOYSA-N 0.000 claims abstract description 20
- CBCKQZAAMUWICA-UHFFFAOYSA-N 1,4-phenylenediamine Chemical compound NC1=CC=C(N)C=C1 CBCKQZAAMUWICA-UHFFFAOYSA-N 0.000 claims abstract description 19
- 235000010265 sodium sulphite Nutrition 0.000 claims abstract description 19
- 239000002994 raw material Substances 0.000 claims abstract description 14
- 239000000499 gel Substances 0.000 claims description 112
- 239000007787 solid Substances 0.000 claims description 18
- 230000007062 hydrolysis Effects 0.000 claims description 16
- 238000006460 hydrolysis reaction Methods 0.000 claims description 16
- 238000003756 stirring Methods 0.000 claims description 13
- 238000006073 displacement reaction Methods 0.000 claims description 11
- 230000015572 biosynthetic process Effects 0.000 claims description 10
- 230000035699 permeability Effects 0.000 claims description 9
- 238000013019 agitation Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims 1
- 239000003129 oil well Substances 0.000 description 19
- 244000025254 Cannabis sativa Species 0.000 description 10
- 230000000694 effects Effects 0.000 description 10
- 238000002347 injection Methods 0.000 description 10
- 239000007924 injection Substances 0.000 description 10
- 239000000243 solution Substances 0.000 description 9
- 238000001879 gelation Methods 0.000 description 8
- 230000001965 increasing effect Effects 0.000 description 8
- 238000010793 Steam injection (oil industry) Methods 0.000 description 7
- UHOVQNZJYSORNB-UHFFFAOYSA-N monobenzene Natural products C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 7
- 238000010276 construction Methods 0.000 description 6
- 230000007423 decrease Effects 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- -1 polypropylene Polymers 0.000 description 6
- 239000003431 cross linking reagent Substances 0.000 description 5
- 229920003023 plastic Polymers 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 239000003381 stabilizer Substances 0.000 description 3
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 2
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 2
- NIPNSKYNPDTRPC-UHFFFAOYSA-N N-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 NIPNSKYNPDTRPC-UHFFFAOYSA-N 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 2
- 229910000278 bentonite Inorganic materials 0.000 description 2
- 239000000440 bentonite Substances 0.000 description 2
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 241000894007 species Species 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- GEYOCULIXLDCMW-UHFFFAOYSA-N 1,2-phenylenediamine Chemical compound NC1=CC=CC=C1N GEYOCULIXLDCMW-UHFFFAOYSA-N 0.000 description 1
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical class [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 229940123973 Oxygen scavenger Drugs 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000002981 blocking agent Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 125000006297 carbonyl amino group Chemical group [H]N([*:2])C([*:1])=O 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
Classifications
-
- 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
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/44—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing organic binders only
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention provides a gel channeling sealing agent, a preparation method thereof and a channeling sealing method. The raw materials for preparing the gel channeling sealing agent comprise, by weight, 0.2% -0.4% of polyacrylamide, 0.01% -0.015% of resorcinol, 0.25% -0.4% of trioxymethylene, 0.15% -0.25% of phenol, 0.04% of sodium sulfite, 0.02% -0.04% of p-phenylenediamine and the balance of water. The gel channeling sealing agent provided by the invention is simple in preparation process and easy to operate, is used for channeling sealing of a steam huff-puff well, has the characteristics of strong temperature resistance and strong plugging property, can resist the temperature of 250 ℃, does not dehydrate after resisting the temperature for 2 months, has the plugging rate of more than 85%, and can greatly improve the utilization efficiency of steam and the yield of the steam huff-puff well.
Description
Technical field
The invention belongs to technical field of petroleum extraction, it is related to that a kind of gel envelope alters agent and preparation method thereof and envelope alters method.
Background technique
Currently, major oil-field thick-oil block mainly uses steam soak mode to exploit.With the increase of steam soak round,
There are macropore or predominant pathways on stratum, due to enhancing in layer with interlayer heterogeneity, appearance oil during steam injection
The longitudinal air-breathing unevenness of layer and steam channeling phenomenon cause to inject steam utilization reduction, and the aqueous rapid increase of producing well, reduction is opened
Send out effect.Therefore, oil well is carried out effectively envelope to alter being the important measures for improving effectiveness before steam injection.
Carry out that the research altered of envelope is relatively more, and the envelope of most common of them, which alters agent mainly, there are inorganic particulate species for steam-stimulated well
High temperature envelope alters agent, gel type high temp envelope alters agent and foam high temperature envelope alters agent；But it is had some disadvantages when applying at the scene, it is inorganic
Particulate species blocking agent haves the shortcomings that operating distance is short and big to formation damage, as people are to the continuous of oil-well strata protective awareness
Increase, which uses fewer and fewer；Gel type high temp envelope alters agent, and there are the main problems of temperature tolerance difference；Foam type high temp envelope is altered
Agent has that operating distance and validity period are short.Therefore, three compares, and gel type high temp envelope alters the main side that agent is research
To not damaged to stratum because it while effectively being blocked, can also carry out effective de-plugging.
CN101255260A discloses a kind of heatproof salt-resistant cross-linking polymer system, and gel rubber system uses polyacrylamide
For host agent, melamine and formaldehyde are crosslinking agent, carry out plastic, the closure suitable for 30 DEG C of -110 DEG C of stratum.CN1103130A
A kind of bentonite gel plugging agent is disclosed, plastic is carried out using bentonite, polyacrylamide, sulfonated phenol formaldehyde resin etc., is applicable in
Closure in 20 DEG C of -150 DEG C of stratum；However, when steam-stimulated well steam injection, bottom hole temperature (BHT) at 250 DEG C or so, therefore, it is necessary to
Gel rubber system high temperature resistant, shut-off capacity is strong, just can effectively realize and alter to the envelope of steam.
Summary of the invention
It is directed to the problem that gel type high temp envelope alters the difference of temperature tolerance existing for agent, it is solidifying that the purpose of the present invention is to provide one kind
Glue envelope alters agent and preparation method thereof and envelope alters method.
The purpose of the present invention is achieved by the following technical programs:
A kind of gel envelope alters agent, by weight percentage, prepares gel envelope and alters the raw material of agent and include:
Polyacrylamide 0.2%-0.4%
Resorcinol 0.01%-0.015%
Metaformaldehyde 0.25%-0.4%
Phenol 0.15%-0.25%
Sodium sulfite 0.04%
P-phenylenediamine 0.02%-0.04%
The water of surplus.
Above-mentioned gel envelope is altered in agent, and the polyacrylamide can use conventional polypropylene amide；Preferably, described poly- third
The molecular weight of acrylamide is 16,000,000, solid content 93.2%, degree of hydrolysis 21.3%.
Above-mentioned gel envelope is altered in agent, it is preferable that the gelling temperature that the gel envelope alters agent is 60 DEG C -90 DEG C.
Above-mentioned gel envelope is altered in agent, it is preferable that the gelation time that the gel envelope alters agent is 10h-72h.
Above-mentioned gel envelope is altered in agent, it is preferable that the gel envelope altered agent is 5000mPas- at adhesiveness
30000mPa·s。
The present invention also provides the preparation methods that above-mentioned gel envelope alters agent comprising following steps:
Polyacrylamide is added in Agitation Tank first, stirring is uniformly mixed it with water；Then be added resorcinol,
Metaformaldehyde, phenol, sodium sulfite and p-phenylenediamine, are uniformly mixed, and obtain gel envelope and alter agent.
The present invention also provides a kind of envelopes of steam-stimulated well to alter method, and above-mentioned gel envelope is used to alter agent, including following step
It is rapid:
Step 1 first injects the polyacrylamide solution that weight percent concentration is 0.2% into steam-stimulated well；
Then step 2 injects the gel envelope into steam-stimulated well again and alters agent.
Above-mentioned envelope is altered in method, it is contemplated that and gel envelope alters agent in the suction-operated on stratum, injects before gel envelope alters agent slug,
It first injects the polyacrylamide solution that a certain amount of weight percent concentration is 0.2% and is used as and sacrifice slug；According to practical operation,
Calculating dosage is carried out generally according to the displacement radius of near wellbore zone 0.5m-1m；Calculation formula is obtained according to cylindrical cubature formula
Sacrifice agent dosage V1=π r2H Φ, wherein r is displacement radius, m；H is Effective thickness of formation, m；Φ is formation porosity, %；
Above-mentioned envelope is altered in method, it is preferable that in step 2, for the stratum of middle permeability, is injected the gel envelope and is altered
Agent take first injection Weak Gels envelope alter agent, reinject the mode that strong gel envelope alters agent.
Above-mentioned envelope is altered in method, and the stratum of the middle permeability refers to that permeability is 50 × 10-3μm2-500×10-3μm2
Stratum.
Above-mentioned envelope is altered in method, for the stratum of middle permeability, inject gel envelope alter agent take first injection Weak Gels envelope alter
Agent can enter stratum duct higher depth under a certain pressure, cut open so as to adjust air-breathing since it is with certain mobility
Face；It is subsequently implanted into strong gel envelope and alters the effect that agent primarily serves closure stratum and the Weak Gels envelope of front end injection is protected to alter agent.By force
The specific dosage of gel is calculated according to blocking radius, and for straight well, general displacement radius is 1.5m-2.0m, utilizes circle
Cylindricality cubature formula obtains strong amount of gel V2=π r2H Φ, wherein r is displacement radius, m；H is Effective thickness of formation, m；Φ is
Formation porosity, %；Weak Gels dosage V3=gel envelope alters the strong amount of gel V of the total dosage V- of agent2；Calculated for gel envelope is altered agent and is always used
Measure V=π r2(wherein r is displacement radius, m to H Φ；H is Effective thickness of formation, m；Φ is formation porosity, %) when, in channeling journey
On the basis of degree and construction funds, dosage is as big as possible, and adjustment displacement radius is generally not less than 10m.
Above-mentioned envelope is altered in method, the displacement radius refers to using oil-water well wellbore centre as the center of circle, to pit shaft around extend
Distance.
Above-mentioned envelope is altered in method, it is preferable that by weight percentage, preparing the raw material that the Weak Gels envelope alters agent includes:
Polyacrylamide 0.2%-0.25%
Resorcinol 0.01%-0.012%
Metaformaldehyde 0.25%
Phenol 0.15%
Sodium sulfite 0.04%
P-phenylenediamine 0.02%
The water of surplus.
Above-mentioned envelope is altered in method, it is preferable that by weight percentage, preparing the raw material that the strong gel envelope alters agent includes:
Polyacrylamide 0.3%-0.4%
Resorcinol 0.012%-0.015%
Metaformaldehyde 0.35%
Phenol 0.2%
Sodium sulfite 0.04%
P-phenylenediamine 0.03%-0.04%
The water of surplus.
Above-mentioned envelope is altered in method, and what the Weak Gels envelope altered agent is 5000mPas-10000mPas at adhesiveness；Institute
State that strong gel envelope alters agent is 10000mPas-30000mPas at adhesiveness.
Gel envelope provided by the invention is altered in agent, in preparing the raw material components that gel envelope alters agent, resorcinol and three
Polyformaldehyde is as crosslinking agent, and phenol is as reinforcing agent, and sodium sulfite is as oxygen scavenger, and p-phenylenediamine is as high-temperature stabilizer.It is poly-
Acrylamide has certain viscosity, passes through during gel-forming as the polymer substance for preparing gel, solution itself
The effect of crosslinking agent makes its strand form space network, increases its viscosity.
Envelope provided by the invention is altered in method, and resorcinol and phenol all can by reacting, to form phenolic aldehyde pre- with metaformaldehyde
Aggressiveness passes through the-CH in phenolic aldehyde performed polymer2Amide groups-the CONH of OH and polyacrylamide2It crosslinks reaction and generates gel
Component, temperature is lower before injecting steam, and the crosslinking agent for playing key reaction at this time is resorcinol, first after under ground portion plastic
First block stratum, prevent subsequent medicament from channelling occurs, when injecting steam, temperature is increased, at this moment play a major role be phenol and
P-phenylenediamine forms high-temperature-resgelant gelant by acting synergistically between medicament.
And the addition of the stronger p-phenylenediamine of reproducibility, the double properties with phenyl ring and amino, by-NH2With water
- CH in the carboxyl-COOH and phenolic aldehyde performed polymer of the polyacrylamide of solution2OH reaction, the rigidity of enhancing colloid crosslinking node, makes
Its temperature tolerance greatly improves.The metaformaldehyde used belongs to solid particle, compared with formaldehyde, without penetrating odor, can keep away
Exempt from harm of the site operation in the process to resident near construction personnel and scene, there is certain environmental-protecting performance.
Gel provided by the invention envelope alters that agent has the characteristics that temperature tolerance by force and seal-off effect is strong, and heatproof is and resistance to up to 250 DEG C
Temperature is not dehydrated for 2 months, and sealing ratiod is greater than 85%, can greatly improve the utilization efficiency of steam, improves steam soak well production, and
Extemporaneous preparation process is simple, easily operated.
Specific embodiment
In order to which technical characteristic of the invention, purpose and beneficial effect are more clearly understood, now to skill of the invention
Art scheme carries out described further below, but should not be understood as that limiting the scope of the invention.
Following polyacrylamides used in the examples are the production of Coal Burst In Fushun Longfeng Coal chemical plant, and molecular weight is 16,000,000, Gu
Content is 93.2%, degree of hydrolysis 21.3%；Under different temperatures, the polyacrylamide of different weight percentage concentration is corresponding viscous
Degree is as shown in table 1.
Table 1
Embodiment 1
The present embodiment provides a kind of gel envelopes to alter agent, by weight percentage, prepares gel envelope and alters the raw material of agent and include:
Polyacrylamide 0.4% (molecular weight 16,000,000, solid content 93.2%, degree of hydrolysis 21.3%)
Resorcinol 0.015%
Metaformaldehyde 0.4%
Phenol 0.25%
Sodium sulfite 0.04%
P-phenylenediamine 0.04%
The water of surplus.
The present embodiment also provides the method that above-mentioned gel envelope alters agent for preparing comprising following steps:
By weight percentage, first by 0.4% polyacrylamide (molecular weight 16,000,000, solid content 93.2%, hydrolysis
21.3%) degree is added in Agitation Tank, 700r/min at the uniform velocity stirs 1h, is uniformly mixed it with water；It is then respectively adding
0.015% resorcinol, 0.4% metaformaldehyde, 0.25% phenol, 0.04% sodium sulfite and 0.04% to benzene
Diamines, stirring 30min are uniformly mixed, and are obtained gel envelope and are altered agent.
After tested, gelling temperature are as follows: 70 DEG C；Gelation time is 14h.
The envelope that the present embodiment also provides a kind of steam-stimulated well alters method, and the steam-stimulated well is low temperature grass 55-556
Oil well, due to its in-place permeability 656 × 10 that is averaged-3μm2, there are macropore, the stronger feature of heterogeneity.
Agent is altered using gel manufactured in the present embodiment envelope, is injected first into low temperature grass 55-556 oil well a certain amount of heavy
Measure the polyacrylamide that percent concentration is 0.2% (molecular weight is 16,000,000, solid content 93.2%, degree of hydrolysis 21.3%)
Solution, the gel envelope for then reinjecting the present embodiment alter agent.
After agent is altered to low temperature grass 55-556 oil well implementation injection gel envelope in scene, the results are shown in Table 2, on steam injection pressure
It rises obviously, compared to 3.8MPa is increased, the average product of oil well 2.5t/d from before constructing becomes 3.9t/d, Liquid output for construction front and back
Decline, dewatering effect are obvious.
Embodiment 2
The present embodiment provides two kinds of gel envelopes to alter agent, and one is Weak Gels envelopes to alter agent, and one is strong gel envelopes to alter agent, with weight
Percentages are measured, preparing the raw material that the Weak Gels envelope alters agent includes:
Polyacrylamide 0.25% (molecular weight 16,000,000, solid content 93.2%, degree of hydrolysis 21.3%)
Resorcinol 0.012%
Metaformaldehyde 0.25%
Phenol 0.15%
Sodium sulfite 0.04%
P-phenylenediamine 0.02%
The water of surplus；
Preparing the raw material that the strong gel envelope alters agent includes:
Polyacrylamide 0.35% (molecular weight 16,000,000, solid content 93.2%, degree of hydrolysis 21.3%)
Resorcinol 0.015%
Metaformaldehyde 0.35%
Phenol 0.2%
Sodium sulfite 0.04%
P-phenylenediamine 0.04%
The water of surplus.
The present embodiment also provides the method that above-mentioned Weak Gels envelope alters agent for preparing comprising following steps:
By weight percentage, first by 0.25% polyacrylamide (molecular weight 16,000,000, solid content 93.2%, water
Solution degree 21.3%) it is added in Agitation Tank, 700r/min at the uniform velocity stirs 1h, is uniformly mixed it with water；It is then respectively adding
0.012% resorcinol, 0.25% metaformaldehyde, 0.15% phenol, 0.04% sodium sulfite and 0.02% pair
Phenylenediamine, stirring 30min are uniformly mixed, and are obtained Weak Gels envelope and are altered agent.
After tested, gelling temperature are as follows: 60 DEG C；Gelation time is 47h.
The present embodiment also provides the method that above-mentioned strong gel envelope alters agent for preparing comprising following steps: with weight percent
0.35% polyacrylamide (molecular weight 16,000,000, solid content 93.2%, degree of hydrolysis 21.3%), is added to liquid by meter first
In tank, 700r/min at the uniform velocity stirs 1h, is uniformly mixed it with water；Be then respectively adding 0.015% resorcinol, 0.35%
Metaformaldehyde, 0.2% phenol, 0.04% sodium sulfite and 0.04% p-phenylenediamine, stirring 30min be uniformly mixed,
It obtains strong gel envelope and alters agent.
After tested, gelling temperature are as follows: 60 DEG C；Gelation time is 32h.
The envelope that the present embodiment also provides a kind of steam-stimulated well alters method, and the steam-stimulated well is low temperature grass 40-
558,40-559 and 42-565 oil well, due to its in-place permeability 191 × 10 that is averaged-3μm2, heterogeneity is strong, therefore design segments
It is divided into Weak Gels envelope when plug and alters agent+strong gel envelope and alter the combination of agent and injected, stratum is blocked to greatest extent.
Agent is altered using Weak Gels manufactured in the present embodiment envelope and strong gel envelope alters agent, first respectively to low temperature grass 40-
558, the polyacrylamide (molecular weight that a certain amount of weight percent concentration is 0.2% is injected in 40-559 and 42-565 oil well
It is 16,000,000, solid content 93.2%, degree of hydrolysis 21.3%) solution, the Weak Gels for being then poured into the present embodiment, which seal, alters agent, then
The strong gel envelope of injection the present embodiment alters agent.
After agent is altered to low temperature grass 40-558,40-559 and 42-565 oil well implementation injection gel envelope in scene, as a result such as table 2
Shown, steam injection pressure rises obviously, and construction front and back is compared, and 49-558 oil well pressure increases 0.8MPa, 40-559 oil well pressure
1.7MPa is increased, 42-565 oil well pressure increases 1.5MPa, and the average product of three oil wells 1.1t/d from before constructing becomes
1.73t/d, Liquid output decline, dewatering effect are obvious.
Embodiment 3
The present embodiment provides two kinds of gel envelopes to alter agent, and one is Weak Gels envelopes to alter agent, and one is strong gel envelopes to alter agent, with weight
Percentages are measured, preparing the raw material that the Weak Gels envelope alters agent includes:
Polyacrylamide 0.2% (molecular weight 16,000,000, solid content 93.2%, degree of hydrolysis 21.3%)
Resorcinol 0.01%
Metaformaldehyde 0.25%
Phenol 0.15%
Sodium sulfite 0.04%
P-phenylenediamine 0.02%
The water of surplus；
Preparing the raw material that the strong gel envelope alters agent includes:
Polyacrylamide 0.3% (molecular weight 16,000,000, solid content 93.2%, degree of hydrolysis 21.3%)
Resorcinol 0.012%
Metaformaldehyde 0.35%
Phenol 0.2%
Sodium sulfite 0.04%
P-phenylenediamine 0.03%
The water of surplus.
The present embodiment also provides the method that above-mentioned Weak Gels envelope alters agent for preparing comprising following steps: with weight percent
0.2% polyacrylamide (molecular weight 16,000,000, solid content 93.2%, degree of hydrolysis 21.3%), is added to liquid by meter first
In tank, 700r/min at the uniform velocity stirs 1h, is uniformly mixed it with water；Be then respectively adding 0.01% resorcinol, 0.25%
Metaformaldehyde, 0.15% phenol, 0.04% sodium sulfite and 0.02% p-phenylenediamine, stirring 30min be uniformly mixed,
It obtains Weak Gels envelope and alters agent.
After tested, gelling temperature are as follows: 80 DEG C；Gelation time is 37h.
The present embodiment also provides the method that above-mentioned strong gel envelope alters agent for preparing comprising following steps:
By weight percentage, first by 0.3% polyacrylamide (molecular weight 16,000,000, solid content 93.2%, hydrolysis
21.3%) degree is added in Agitation Tank, 700r/min at the uniform velocity stirs 1h, is uniformly mixed it with water；It is then respectively adding
0.012% resorcinol, 0.35% metaformaldehyde, 0.2% phenol, 0.04% sodium sulfite and 0.03% to benzene
Diamines, stirring 30min are uniformly mixed, and are obtained strong gel envelope and are altered agent.
After tested, gelling temperature are as follows: 80 DEG C；Gelation time is 14h.
The envelope that the present embodiment also provides a kind of steam-stimulated well alters method, and the steam-stimulated well is low temperature grass 41- flat 2
Oil well, due to its in-place permeability 81 × 10 that is averaged-3μm2, heterogeneity is strong, therefore is divided into Weak Gels envelope when design slug and alters agent
+ the combination that gel envelope alters agent by force is injected, and is blocked to greatest extent to stratum.
Agent is altered using Weak Gels manufactured in the present embodiment envelope and strong gel envelope alters agent, puts down 2 oil wells to low temperature grass 41- first
(molecular weight is 16,000,000 to the polyacrylamide that middle a certain amount of weight percent concentration of injection is 0.2%, and solid content is
93.2%, degree of hydrolysis 21.3%) solution, the Weak Gels for being then poured into the present embodiment, which seal, alters agent, reinjects the strong of the present embodiment
Gel envelope alters agent.
After agent is altered to the flat 2 oil wells implementation injection gel envelope of low temperature grass 41- in scene, the results are shown in Table 2, on steam injection pressure
It rises obviously, compared to 1.3MPa is increased, the average product of oil well 1.9t/d from before constructing becomes 3.2t/d, Liquid output for construction front and back
Decline, dewatering effect are obvious.
Table 2 is that oil well injection gel envelope alters steam injection pressure and oil-producing Liquid output comparison diagram before and after agent.It is mentioned using embodiment 1-3
The gel envelope of confession alters agent, year secondary using 5 wells in low temperature grass steam-stimulated well respectively, the construction operation from 2014 to 2015
Afterwards, corresponding oil well stream-injection force pressure rises, and decreasing water cut and increasing oil effect is obvious；Stage accumulative increasing oil 1206.1t, adds up precipitation
15808m3, average individual well increasing oil 241.2t, average single sinking 3161.6m3, average aqueous decline 5% brings good economy
Benefit.
Table 2
Embodiment 4
The present embodiment provides the polyacrylamide of different weight percentage concentration, (molecular weight is 16,000,000, and solid content is
93.2%, degree of hydrolysis 21.3%) influence for altering the viscosity of agent is sealed to the gel of preparation.
By weight percentage, it prepares gel envelope and alters the raw material of agent and include:
Polyacrylamide 0.2%, 0.25%, 0.3%, 0.35%, 0.4%
Resorcinol 0.015%
Metaformaldehyde 0.4%
Phenol 0.25%
Sodium sulfite 0.04%
P-phenylenediamine 0.04%
The water of surplus.
The preparation method is the same as that of Example 1-3.Gelling temperature is 70 DEG C.The results are shown in Table 3, and table 3 is different weight percentage
Concentration polyacrylamide preparation gel envelope alter agent at adhesiveness and time comparison diagram.
Table 3
From 3 experimental data of table: with the increase of polyacrylamide weight percent concentration, gelation time gradually contracts
It is short, it is higher and higher at adhesiveness.The reason is that, with the increase of concentration of polyacrylamide, polyacrylamide amine molecule in solution
Quantity is also increasing, and the node in conjunction with crosslinking agent increases, and the speed for forming space net structure is also faster, and quantity is also got over
It is more, so that gelation time reduces, increase at adhesiveness.
Embodiment 5
The present embodiment provides gel envelope of the high-temperature stabilizer hydroquinone of different weight percentage concentration to preparation to alter agent
The influence of dehydrating amount.
By weight percentage, it prepares gel envelope and alters the raw material of agent and include:
Polyacrylamide 0.3%
Resorcinol 0.015%
Metaformaldehyde 0.4%
Phenol 0.25%
Sodium sulfite 0.04%
P-phenylenediamine 0%, 0.01%, 0.02%, 0.03%, 0.04%
The water of surplus.
The preparation method is the same as that of Example 1-3.Gelling temperature is 70 DEG C, after plastic, is placed in 250 DEG C of insulating box, is observed
Gel envelope alters the cases of dehydration of agent under different time, and the results are shown in Table 4, and table 4 is different weight percentage concentration to benzene two
The gel envelope of amine preparation alters the influence that agent changes over time dehydrating amount.
Table 4
From 4 experimental data of table: with the increase of high-temperature stabilizer p-phenylenediamine additive amount, and with high-temperature time
Extension, gel envelope alters the dehydrating amount of agent and gradually decreases.Reason is: gel heatproof mainly sees that it is formed solid netted
The intensity of structure, hydrone are wrapped in its space network, under the high temperature conditions, if destructurized, are wrapped in
Its internal hydrone just releases, and colloid is largely dehydrated, viscosity decline, strength reduction.Gel envelope provided in this embodiment
Altering agent has the characteristics that temperature tolerance is strong and seal-off effect is strong, and heatproof is up to 250 DEG C, and heatproof 2 months are not dehydrated, and sealing ratiod is greater than
85%.
In conclusion gel envelope provided by the invention, which alters agent, has the characteristics that temperature tolerance is strong and seal-off effect is strong, heatproof is reachable
250 DEG C, and heatproof 2 months are not dehydrated, sealing ratiod is greater than 85%, can greatly improve the utilization efficiency of steam, improves steam and gulps down
Well production is spat, and extemporaneous preparation process is simple, easily operated.
Claims (4)
1. a kind of envelope of steam-stimulated well alters method comprising following steps:
Step 1 first injects the polyacrylamide solution that weight percent concentration is 0.2% into steam-stimulated well；
Then step 2 first injects Weak Gels envelope into steam-stimulated well again and alters agent, reinjects strong gel envelope and alter agent；
Wherein, it is 0.5m-1m according to the near wellbore zone displacement radius of steam-stimulated well, utilizes cylindrical cubature formula V1=π r1 2H
Φ obtains polyacrylamide solution dosage, wherein r1For near wellbore zone displacement radius, m；H is Effective thickness of formation, m；Φ is ground
Layer porosity, %；
It is 1.5m-2.0m according to the displacement radius of steam-stimulated well, utilizes cylindrical cubature formula V=π r2H Φ obtains strong gel
Envelope alters agent dosage and Weak Gels envelope alters agent dosage, and wherein r is the displacement radius of steam-stimulated well, m；H is Effective thickness of formation, m；
Φ is formation porosity, %；
The stratum is the stratum of middle permeability, and permeability is 50 × 10-3μm2-500×10-3μm2；
By weight percentage, preparing the raw material that the Weak Gels envelope alters agent includes:
By weight percentage, preparing the raw material that the strong gel envelope alters agent includes:
2. envelope according to claim 1 alters method, it is characterised in that: the molecular weight of the polyacrylamide is 16,000,000,
Solid content is 93.2%, degree of hydrolysis 21.3%.
3. envelope according to claim 1 alters method, it is characterised in that: what Weak Gels envelope altered agent is at adhesiveness
5000mPa·s-10000mPa·s；What the strong gel envelope altered agent is 10000mPas-30000mPas at adhesiveness.
4. envelope according to claim 1 alters method, it is characterised in that: the Weak Gels envelope alters agent and the strong gel envelope is altered
Agent preparation method is identical, are as follows:
Agent is altered according to Weak Gels envelope or the strong gel envelope alters the formula of agent, and polyacrylamide is added to Agitation Tank first
In, stirring is uniformly mixed it with water；Then resorcinol, metaformaldehyde, phenol, sodium sulfite and p-phenylenediamine is added, stirs
Mix it is uniformly mixed, obtain Weak Gels envelope alter agent or strong gel envelope alter agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610626303.3A CN106350042B (en) | 2016-08-02 | 2016-08-02 | Gel channeling sealing agent, preparation method thereof and channeling sealing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610626303.3A CN106350042B (en) | 2016-08-02 | 2016-08-02 | Gel channeling sealing agent, preparation method thereof and channeling sealing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106350042A CN106350042A (en) | 2017-01-25 |
| CN106350042B true CN106350042B (en) | 2019-02-15 |
Family
ID=57843520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610626303.3A Active CN106350042B (en) | 2016-08-02 | 2016-08-02 | Gel channeling sealing agent, preparation method thereof and channeling sealing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106350042B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107654219A (en) * | 2017-11-03 | 2018-02-02 | 西南石油大学 | A kind of steam soak method exploitation of gas hydrate system and technique |
| CN108003854B (en) * | 2017-11-23 | 2020-05-08 | 中国石油天然气股份有限公司 | Channeling sealing agent for buried hill fractured reservoir and injection method thereof |
| CN108531159B (en) * | 2018-04-11 | 2021-01-01 | 东北石油大学 | High-temperature plugging agent system for heavy oil thermal recovery oil reservoir |
| CN109181664B (en) * | 2018-09-14 | 2021-03-12 | 四川大学 | Temperature-resistant gel blocking agent of phenylenediamine cross-linked polyacrylamide and preparation method thereof |
| CN112983369B (en) * | 2019-12-12 | 2022-10-04 | 中国石油天然气股份有限公司 | Three-slug high-temperature profile control method for steam huff-puff ultra-heavy oil well |
| CN114106800A (en) * | 2020-08-26 | 2022-03-01 | 中国海洋石油集团有限公司 | Bisphenol S and formaldehyde cross-linked high-temperature-resistant gel blocking agent |
| CN113881410A (en) * | 2021-10-11 | 2022-01-04 | 克拉玛依市红都有限责任公司 | Plugging agent suitable for SAGD micro-fracturing and preparation method thereof |
| CN113652214B (en) * | 2021-10-19 | 2022-03-08 | 山东德仕化工有限公司 | Supercritical carbon dioxide channeling sealing agent and preparation method and application thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101020816A (en) * | 2007-02-12 | 2007-08-22 | 中国石化集团河南石油勘探局 | High temperature profile control agent |
| CN102533233A (en) * | 2012-01-04 | 2012-07-04 | 中国石油天然气股份有限公司 | High-temperature-resistant high-salinity water shutoff profile control agent and preparation method and application thereof |
| CN102807849A (en) * | 2012-04-06 | 2012-12-05 | 中国石油大学(华东) | Gel plugging agent for deep profile control of higher temperature oil reservoir and preparation method of gel plugging agent |
| CN103030916A (en) * | 2012-11-23 | 2013-04-10 | 中国石油天然气股份有限公司 | Gel composition and nitrogen foam gel composite temporary plugging agent containing same |
| CN105484697A (en) * | 2015-12-22 | 2016-04-13 | 中国石油天然气股份有限公司 | Profile control channeling sealing method for super heavy oil reservoir |
-
2016
- 2016-08-02 CN CN201610626303.3A patent/CN106350042B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101020816A (en) * | 2007-02-12 | 2007-08-22 | 中国石化集团河南石油勘探局 | High temperature profile control agent |
| CN102533233A (en) * | 2012-01-04 | 2012-07-04 | 中国石油天然气股份有限公司 | High-temperature-resistant high-salinity water shutoff profile control agent and preparation method and application thereof |
| CN102807849A (en) * | 2012-04-06 | 2012-12-05 | 中国石油大学(华东) | Gel plugging agent for deep profile control of higher temperature oil reservoir and preparation method of gel plugging agent |
| CN103030916A (en) * | 2012-11-23 | 2013-04-10 | 中国石油天然气股份有限公司 | Gel composition and nitrogen foam gel composite temporary plugging agent containing same |
| CN105484697A (en) * | 2015-12-22 | 2016-04-13 | 中国石油天然气股份有限公司 | Profile control channeling sealing method for super heavy oil reservoir |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106350042A (en) | 2017-01-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106350042B (en) | Gel channeling sealing agent, preparation method thereof and channeling sealing method | |
| CN103232839B (en) | Water shutoff agent applicable to high-temperature high-salt oil reservoir water shutoff profile control | |
| CN102559159B (en) | High-temperature-resistant phenolic resin weak gel profile control water plugging agent | |
| CN104974724B (en) | Underground gel-forming plugging agent suitable for medium-high temperature high-salt low-permeability oil reservoir and preparation method thereof | |
| CN105586024B (en) | Profile control and water shutoff agent for high-temperature hypersalinity oil reservoir and profile control and water shutoff method | |
| CN105086967A (en) | Channeling-preventing and blocking agent and construction method for blocking and blocking channeling by using same | |
| CN106047324A (en) | Reinforced gel dispersion deep profile control and flooding agent for low-permeability high-temperature high-salt oil reservoirs | |
| CN101531890B (en) | Preparation method of profile control agent for oil field deep temporary blocking | |
| CN106947450B (en) | Deep profile control and flooding agent with low initial viscosity and preparation method thereof | |
| CN104629699B (en) | A kind of heat-resistant salt-resistant frozen glue of low cross-linking agent consumption | |
| CN104357032A (en) | High-temperature resistant secondary cross-linked gel profile control agent and preparation method thereof | |
| CN104099074B (en) | Volume fracturing reconstruction crack plugging agent and water plugging construction method | |
| CN104531105B (en) | Temporary plugging workover fluid for low-pressure sandstone reservoir gas well and preparation method | |
| CN108659805A (en) | A kind of emulsion-type low temperature sand-fixating agent and the preparation method and application thereof | |
| CN106479463A (en) | Retarded crosslinking high intensity frozen glue profile-controlling and plugging agent | |
| CN106188403A (en) | A kind of anti-CO of high temperature and high salt oil deposit2has channeling blocking agent and preparation method thereof | |
| CN101880522A (en) | Novel inorganic-organic ternary composite plugging agent for oil extraction and preparation method | |
| CN104449624A (en) | Novel sand control agent for high-temperature sand control in steam huff-puff oil well | |
| CN104419390A (en) | Composite plugging agent for oil well water control and preparation method thereof | |
| CN107739599A (en) | A kind of high temperature low-density water shutoff agent and preparation method thereof and onsite application method | |
| CN108505982A (en) | Old well repeated fracturing production increase method for realizing temporary plugging steering by adopting liquid rubber plug | |
| CN105683330A (en) | Carbonate-based slurry fracturing with solid acid for unconventional reservoir | |
| CN104371692A (en) | Deep coating composite gel modifying and flooding agent for oil recovery and preparation method of deep coating composite gel modifying and flooding agent | |
| CN105802598B (en) | Modified alkali lignin plural gel blocking agent of a kind of polyacrylonitrile sodium salt and preparation method thereof | |
| CN103484086B (en) | Gel particle type plugging agent and preparation method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |