CN103821474B - Ultra-low permeability oil reservoir deep profile control method - Google Patents
Ultra-low permeability oil reservoir deep profile control method Download PDFInfo
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- CN103821474B CN103821474B CN201210466088.7A CN201210466088A CN103821474B CN 103821474 B CN103821474 B CN 103821474B CN 201210466088 A CN201210466088 A CN 201210466088A CN 103821474 B CN103821474 B CN 103821474B
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- 238000000034 method Methods 0.000 title claims abstract description 39
- 230000035699 permeability Effects 0.000 title abstract description 4
- 238000002347 injection Methods 0.000 claims abstract description 116
- 239000007924 injection Substances 0.000 claims abstract description 116
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 81
- 239000008398 formation water Substances 0.000 claims abstract description 6
- 238000004140 cleaning Methods 0.000 claims abstract description 5
- 238000006073 displacement reaction Methods 0.000 claims abstract description 5
- 239000000499 gel Substances 0.000 claims description 105
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 51
- AHLWZBVXSWOPPL-RGYGYFBISA-N 20-deoxy-20-oxophorbol 12-myristate 13-acetate Chemical compound C([C@]1(O)C(=O)C(C)=C[C@H]1[C@@]1(O)[C@H](C)[C@H]2OC(=O)CCCCCCCCCCCCC)C(C=O)=C[C@H]1[C@H]1[C@]2(OC(C)=O)C1(C)C AHLWZBVXSWOPPL-RGYGYFBISA-N 0.000 claims description 48
- 241001602688 Pama Species 0.000 claims description 48
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 42
- GHMLBKRAJCXXBS-UHFFFAOYSA-N resorcinol Chemical compound OC1=CC=CC(O)=C1 GHMLBKRAJCXXBS-UHFFFAOYSA-N 0.000 claims description 42
- 239000011259 mixed solution Substances 0.000 claims description 26
- 230000000694 effects Effects 0.000 claims description 10
- 230000015572 biosynthetic process Effects 0.000 claims description 8
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 claims description 7
- 239000002253 acid Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 239000003292 glue Substances 0.000 claims 1
- 125000000129 anionic group Chemical group 0.000 abstract 2
- 229920002401 polyacrylamide Polymers 0.000 abstract 2
- 238000010521 absorption reaction Methods 0.000 abstract 1
- 239000002245 particle Substances 0.000 abstract 1
- 230000008901 benefit Effects 0.000 description 3
- 239000002981 blocking agent Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 229940079593 drug Drugs 0.000 description 2
- 238000001879 gelation Methods 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 235000020681 well water Nutrition 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002734 clay mineral Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a deep profile control method for an ultra-low permeability oil reservoir, which comprises the following steps: the first section plug: injecting anionic polyacrylamide for displacing formation water; and a second slug: injecting high-concentration weak gel, and forming a block slug in the front of the weak gel to prevent the injected water from pushing the weak gel to move forwards; and a third section plug: injecting medium-concentration weak gel, and transporting the medium-concentration weak gel to the deep part of the stratum in cooperation with the high-concentration weak gel; and IV, slug: injecting particle gel to protect the front slug in the slug and prolong the effective period of measures; section V: injecting anionic polyacrylamide for cleaning the slug. The method adopts a high-concentration weak gel, a medium-concentration weak gel and a granular gel system, and adopts a profile control method combining deep profile control and shallow profile control, so that the problem of unsatisfactory water shutoff and profile control measures of the ultra-low permeability oil reservoir water injection well can be effectively solved, the water absorption condition of a reservoir is improved, the utilization rate of injected water is improved, the swept volume is enlarged, and the oil displacement efficiency is finally improved.
Description
Technical field
The present invention relates to field of petroleum exploitation, particularly to a kind of extra-low-permeability reservoir depth profile control method.
Background technology
Extra-low-permeability reservoir has the advantages that permeability is low, stratum is fine and close, heterogeneous body is strong.It is at waterflooding extraction
In show themselves in that the flushing degree that takes effect is poor, the oil well water breakthrough that takes effect is fast.
Extra-low-permeability reservoir water plugging and profile controlling method is mainly to block up at present, continues to increase blocking agent intensity, mainly
Plugging strength is improved with in-situ gelling system and granular system.But the Gelation Conditions of in-situ gelling system is harsh,
Cannot ensure gelling strength after injecting earth formation deep, granular system cannot inject earth formation deep, is subsequently implanted into water
Easily channelling, it is impossible to realize extra-low-permeability reservoir deep profile controlling.Water injection well is using conventional method water plugging and profile controlling
After, to inject the water capacity and easily stream, measure effective time is short, and lateral oilwell measure effect is poor.
Summary of the invention
In order to solve problem of the prior art, embodiments provide one and be applicable to extra-low-permeability reservoir
Depth profile control method, it is possible to increase inject the swept volume of water, thus improve oil recovery.
The present invention adopts the technical scheme that to achieve these goals:
A kind of extra-low-permeability reservoir depth profile control method, it is characterised in that described method includes:
Ith slug: inject PAMA for displacement formation water；
IIth slug: inject high concentration Weak Gels, forms lattice gear slug, prevents from injecting water in Weak Gels front portion
Weak Gels is promoted to migrate forward；
IIIth slug: concentration Weak Gels in injection, collaborative high concentration Weak Gels is migrated to earth formation deep；
IVth slug: inject granulated gel, in slug, the anterior slug of protection, extends measure effect duration；
Vth slug: inject PAMA and be used for cleaning slug.
In described Ith slug: the speed injecting PAMA is 2-5m3/ h, percentage by weight is dense
Degree is 0.15%-0.3%, consumption 100m3-300m3；
In described IIth slug: described high concentration Weak Gels injection rate is 2-5m3/ h, consumption
300m3-500m3, injection pressure is higher than water injection pressure 1-1.5MPa；
Described high concentration Weak Gels is soluble in water by PAMA, formaldehyde, resorcinol and acetic acid
Mix；
In described high concentration Weak Gels, each component weight percent concentration in mixed solution is:
PAMA 0.25-0.35%；Formaldehyde 0.15-0.25%；Resorcinol 0.02-0.03%, second
Acid 0.05-0.07%；
In described IIIth slug: the injection rate of described middle concentration Weak Gels is 2-5m3/ h, consumption
1000m3-1500m3, injection pressure is higher than water injection pressure 1-2MPa；
Described middle concentration Weak Gels is soluble in water by PAMA, formaldehyde, resorcinol and acetic acid
Mix；
In described middle concentration Weak Gels, each component weight percent concentration in mixed solution is:
PAMA 0.15-0.2%, formaldehyde 0.05-0.1%, resorcinol 0.01-0.018%, second
Acid 0.02-0.04%；
In described IVth slug: described granulated gel injection rate is 2-5m3/ h, consumption 200m3-300m3,
Injection pressure is higher than water injection pressure 2.5-4MPa；
Described granulated gel is mixed by PAMA and water drip control degree are soluble in water；
In described granulated gel, each component weight percent concentration in mixed solution is:
PAMA 0.1-0.2%, water drip control degree 0.4-0.6%；
In described Vth slug: the injection rate of PAMA is 2-5m3/ h, consumption
100m3-300m3, weight percent concentration is 0.15-0.30%.
In described high concentration Weak Gels, each component weight percent concentration in mixed solution is:
PAMA 0.3%；Formaldehyde 0.2%；Resorcinol 0.024%, acetic acid 0.06%.
In described middle concentration Weak Gels, each component weight percent concentration in mixed solution is:
PAMA 0.2%；Formaldehyde 0.1%；Resorcinol 0.012%, acetic acid 0.03%.
In described granulated gel, each component weight percent concentration in mixed solution is:
PAMA 0.15%；Water drip control degree 0.5%.
Further, when the injection pressure of the IIth slug is not higher than water injection pressure 1MPa, raise high concentration weak
Gel strength, equal proportion raises drug concentration, makes injection pressure be higher than water injection pressure 1-1.5MPa.
Further, when the injection pressure of the IIIth slug is not higher than water injection pressure 1MPa, concentration in rise
Weak Gels concentration, equal proportion raises drug concentration, makes injection pressure be higher than water injection pressure 1-2MPa.
Further, when the injection pressure of the IVth slug is not higher than water injection pressure 2.5MPa, equal proportion rise
Each concentration of component in grain gel, makes injection pressure be higher than water injection pressure 2.5-4MPa.
The technical scheme that the embodiment of the present invention provides has the benefit that
The extra-low-permeability reservoir depth profile control method of the present invention uses high concentration Weak Gels to add middle concentration Weak Gels,
Add granulated gel system again, the profile control method combined with superficial part profile control with deep profile controlling, the injection of the present invention
Pressure should design according to early stage water injection pressure, and injection rate is generally 2-5m3/ h, plug agent amount is for injecting water institute
The hole swept volume controlled.The present invention can effectively solve the problem that extra-low-permeability reservoir water injection well water plugging and profile controlling measure
The problem that effect is undesirable, improves reservoir water swelling elastomer, improves the utilization rate injecting water, expands swept volume,
Finally improve oil recovery.
In the present invention, the addition effect of each material is as follows:
(1) PAMA
Displacement formation water, delays the formation water dilution to being subsequently implanted into blocking agent.
(2) high concentration Weak Gels
Middle concentration Weak Gels front portion formed lattice gear slug, prevent inject water promote Weak Gels migrate forward and not
Water drive swept volume can be improved.
(3) concentration Weak Gels in
Injecting the Weak Gels of doses, collaborative high concentration Weak Gels is migrated to earth formation deep, and Weak Gels to be protected
Card doses, Weak Gels Gelation Conditions is relatively harsh, and the most guaranteed doses guarantee Weak Gels exists
Plastic under formation condition.
(4) granulated gel
Under the conditions of extra-low-permeability reservoir, the degree of depth that granulated gel is injected into stratum is limited, rises in slug
To the anterior slug of protection, extend the effect of measure effect duration.
(5) PAMA
Cleaning slug, the PAMA of certain viscosity can carry and be trapped in nearly well ground because of profile control
Remaining blocking agent and the clay mineral of band are migrated a segment distance to earth formation deep, prevent from blocking around water injection well pit shaft.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below embodiment of the present invention is made
Describe in detail further.
Embodiment 1
A kind of extra-low-permeability reservoir depth profile control method, described method includes:
Ith slug: injecting weight percent concentration is the PAMA of 1.5%, and injection rate is
4m3/h；Injection rate is 200m3;Inject PAMA for displacement formation water；
IIth slug: inject high concentration Weak Gels, forms lattice gear slug, prevents from injecting water in Weak Gels front portion
Weak Gels is promoted to migrate forward；Described high concentration Weak Gels injection rate is 3m3/ h, consumption 400m3, inject
Pressure is higher than water injection pressure 1MPa；Hypotony can raise high concentration Weak Gels concentration, controls it and injects pressure
Power；Concrete control method is as follows:
When the injection pressure of the IIth slug is not higher than water injection pressure 1MPa, raise high concentration Weak Gels concentration,
Equal proportion raises the concentration of each component in high concentration Weak Gels, the concentration of each component is transferred to be original concentration
0.1 times, if not reaching requirement, also can suitably raise, finally making injection pressure be higher than water injection pressure 1MPa.
By PAMA (HPAM), formaldehyde, resorcinol and acetic acid is soluble in water is sufficiently mixed,
The mixed solution obtained is high concentration Weak Gels；
In described high concentration Weak Gels, each component weight percent concentration in mixed solution is:
PAMA 0.3%；Formaldehyde 0.2%；Resorcinol 0.024%, acetic acid 0.06%；
IIIth slug: concentration Weak Gels in injection, collaborative high concentration Weak Gels is migrated to earth formation deep；Described
The injection rate of middle concentration Weak Gels is 3m3/ h, consumption 1200m3, injection pressure is higher than water injection pressure
1.5MPa；
Hypotony can raise in concentration Weak Gels concentration, control its injection pressure；Concrete control method is such as
Under:
When the injection pressure of the IIIth slug is not higher than water injection pressure 1.5MPa, concentration Weak Gels concentration in rise,
In equal proportion rise, the concentration of each component in concentration Weak Gels, the concentration of each component is transferred to be original concentration
0.1 times, if not reaching requirement, also can suitably raise, finally making injection pressure be higher than water injection pressure
1.5MPa。
It is sufficiently mixed soluble in water to HPAM, formaldehyde, resorcinol and acetic acid, during the mixed solution obtained is
Concentration Weak Gels；
In described middle concentration Weak Gels, each component weight percent concentration in mixed solution is:
PAMA 0.2%；Formaldehyde 0.1%；Resorcinol 0.012%, acetic acid 0.03%；
IVth slug: inject granulated gel, in slug, the anterior slug of protection, extends measure effect duration；Institute
The injection rate stating granulated gel is 3m3/ h, consumption 250m3, injection pressure is higher than water injection pressure 2.5MPa；
When the injection pressure of the IVth slug is not higher than water injection pressure 2.5MPa, raise water drive stream in granulated gel
To the concentration of change agent, during adjustment, the concentration that can make water drip control degree is original 0.1 times, if
Do not reach requirement, also can suitably raise, finally make injection pressure be higher than water injection pressure 2.5MPa；
HPAM and water drip control degree being sufficiently mixed, the mixed solution obtained is granulated gel；
In described granulated gel, each component weight percent concentration in mixed solution is:
PAMA 0.15%；Water drip control degree 0.5%；
Vth slug: injecting weight percent concentration is the PAMA of 0.2%, and injection rate is
3m3/h；Injection rate is 200m3;Inject PAMA to be used for cleaning slug.
The PAMA of the present embodiment, formaldehyde, resorcinol, acetic acid are purchased from Xi'an nation prosperous
Trade Co., Ltd.；Water drip control degree is purchased from Pu oil chemical general factory.
Embodiment 2
A kind of extra-low-permeability reservoir depth profile control method, described method includes:
Ith slug: injecting weight percent concentration is the PAMA of 1.5%, and injection rate is
2m3/h；Injection rate is 300m3;
IIth slug: injecting high concentration Weak Gels, described high concentration Weak Gels injection rate is 2m3/ h, consumption
300m3, injection pressure is higher than water injection pressure 1.5MPa；
Hypotony can raise high concentration Weak Gels concentration, controls its injection pressure；Concrete control method is such as
Embodiment 1；
Configuring high concentration Weak Gels according to the method for embodiment 1, wherein, in high concentration Weak Gels, each component exists
Weight percent concentration in mixed solution is:
PAMA 0.25%；Formaldehyde 0.25%；Resorcinol 0.02%, acetic acid 0.07%；
IIIth slug: concentration Weak Gels in injection, the injection rate of described middle concentration Weak Gels is 5m3/ h, uses
Amount 1000m3, injection pressure is higher than water injection pressure 1MPa；
Hypotony can raise in concentration Weak Gels concentration, control its injection pressure；Concrete control method is such as
Embodiment 1；
Concentration Weak Gels in configuring according to the method for embodiment 1, wherein, in middle concentration Weak Gels, each component exists
Weight percent concentration in mixed solution is:
PAMA 0.15%；Formaldehyde 0.05%；Resorcinol 0.01%, acetic acid 0.04%；
IVth slug: injecting granulated gel, the injection rate of described granulated gel is 5m3/ h, consumption is 300m3,
Injection pressure is higher than water injection pressure 3.5MPa；The too low concentration that can raise water drip control degree of injection pressure,
Control its injection pressure；Concrete method of adjustment such as embodiment 1；
HPAM and water drip control degree being sufficiently mixed, the mixed solution obtained is granulated gel；
In described granulated gel, each component weight percent concentration in mixed solution is:
PAMA 0.1%, water drip control degree 0.6%；
Vth slug: injecting weight percent concentration is the PAMA of 0.15%, and injection rate is
2m3/h；Injection rate is 300m3。
Embodiment 3
A kind of extra-low-permeability reservoir depth profile control method, described method includes:
Ith slug: injecting weight percent concentration is the PAMA of 1.5%, and injection rate is
5m3/h；Injection rate is 100m3;
IIth slug: injecting high concentration Weak Gels, described high concentration Weak Gels injection rate is 5m3/ h, consumption
500m3, injection pressure is higher than water injection pressure 1MPa；
Hypotony can raise high concentration Weak Gels concentration, controls its injection pressure；Concrete control method is such as
Embodiment 1；
Configuring high concentration Weak Gels according to the method for embodiment 1, wherein, in high concentration Weak Gels, each component exists
Weight percent concentration in mixed solution is:
PAMA 0.35%；Formaldehyde 0.15%；Resorcinol 0.03%, acetic acid 0.05%；
IIIth slug: concentration Weak Gels in injection, the injection rate of described middle concentration Weak Gels is 2m3/ h, uses
Amount 1500m3, injection pressure is higher than water injection pressure 2MPa；
Hypotony can raise in concentration Weak Gels concentration, control its injection pressure；Concrete control method is such as
Embodiment 1；
Concentration Weak Gels in configuring according to the method for embodiment 1, wherein, in middle concentration Weak Gels, each component exists
Weight percent concentration in mixed solution is:
PAMA 0.18%；Formaldehyde 0.09%；Resorcinol 0.018%, acetic acid 0.02%.
IVth slug: injecting granulated gel, the injection rate of described granulated gel is 2m3/ h, consumption is 200m3,
Injection pressure is higher than water injection pressure 4MPa；The too low concentration that can raise water drip control degree of injection pressure,
Control its injection pressure；Concrete method of adjustment such as embodiment 1；
HPAM and water drip control degree being sufficiently mixed, the mixed solution obtained is granulated gel；
In described granulated gel, each component weight percent concentration in mixed solution is:
PAMA 0.2%, water drip control degree 0.4%；
Vth slug: injecting weight percent concentration is the PAMA of 0.3%, and injection rate is
5m3/h；Injection rate is 100m3;
The method using the present invention, implements 5 mouthfuls of wells of test in * * oil field, and average individual well group is accumulative increases oil 300t,
Accumulative precipitation 800m3.Can be seen that the present invention improves the utilization rate of injection water from accumulative precipitation, expansion involves
Volume.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all the present invention's
Within spirit and principle, any modification, equivalent substitution and improvement etc. made, should be included in the present invention's
Within protection domain.
Claims (7)
1. an extra-low-permeability reservoir depth profile control method, it is characterised in that described method includes:
Ith slug: inject PAMA for displacement formation water；
IIth slug: inject high concentration Weak Gels, forms lattice gear slug, prevents from injecting water in Weak Gels front portion
Weak Gels is promoted to migrate forward；
IIIth slug: concentration Weak Gels in injection, collaborative high concentration Weak Gels is migrated to earth formation deep；
IVth slug: inject granulated gel, in slug, the anterior slug of protection, extends measure effect duration；
Vth slug: inject PAMA and be used for cleaning slug；
In described Ith slug: the speed injecting PAMA is 2-5m3/ h, percentage by weight is dense
Degree is 0.15%-0.3%, consumption 100m3-300m3；
In described IIth slug: described high concentration Weak Gels injection rate is 2-5m3/ h, consumption
300m3-500m3, injection pressure is higher than water injection pressure 1-1.5MPa；
Described high concentration Weak Gels is soluble in water by PAMA, formaldehyde, resorcinol and acetic acid
Mix；
In described high concentration Weak Gels, each component weight percent concentration in mixed solution is:
PAMA 0.25-0.35%；Formaldehyde 0.15-0.25%；Resorcinol 0.02-0.03%, second
Acid 0.05-0.07%；
In described IIIth slug: the injection rate of described middle concentration Weak Gels is 2-5m3/ h, consumption
1000m3-1500m3, injection pressure is higher than water injection pressure 1-2MPa；
Described middle concentration Weak Gels is soluble in water by PAMA, formaldehyde, resorcinol and acetic acid
Mix；
In described middle concentration Weak Gels, each component weight percent concentration in mixed solution is:
PAMA 0.15-0.2%, formaldehyde 0.05-0.1%, resorcinol 0.01-0.018%, second
Acid 0.02-0.04%；
In described IVth slug: described granulated gel injection rate is 2-5m3/ h, consumption 200m3-300m3,
Injection pressure is higher than water injection pressure 2.5-4MPa；
Described granulated gel is mixed by PAMA and water drip control degree are soluble in water；
In described granulated gel, each component weight percent concentration in mixed solution is:
PAMA 0.1-0.2%, water drip control degree 0.4-0.6%；
In described Vth slug: the injection rate of PAMA is 2-5m3/ h, consumption
100m3-300m3, weight percent concentration is 0.15-0.30%.
A kind of extra-low-permeability reservoir depth profile control method the most according to claim 1, it is characterised in that
In described high concentration Weak Gels, each component weight percent concentration in mixed solution is:
PAMA 0.3%；Formaldehyde 0.2%；Resorcinol 0.024%, acetic acid 0.06%.
A kind of extra-low-permeability reservoir depth profile control method the most according to claim 1 and 2, its feature exists
In,
In described middle concentration Weak Gels, each component weight percent concentration in mixed solution is:
PAMA 0.2%；Formaldehyde 0.1%；Resorcinol 0.012%, acetic acid 0.03%.
A kind of extra-low-permeability reservoir depth profile control method the most according to claim 3, it is characterised in that
In described granulated gel, each component weight percent concentration in mixed solution is:
PAMA 0.15%；Water drip control degree 0.5%.
A kind of extra-low-permeability reservoir depth profile control method the most according to claim 1, it is characterised in that
When the injection pressure of the IIth slug is not higher than water injection pressure 1MPa, equal proportion raises high concentration Weak Gels
In the concentration of each component, make injection pressure be higher than water injection pressure 1MPa.
A kind of extra-low-permeability reservoir depth profile control method the most according to claim 1, it is characterised in that
When the injection pressure of the IIIth slug is not higher than water injection pressure 1.5MPa, during equal proportion raises, concentration is weak solidifying
The concentration of each component in glue, makes injection pressure be higher than water injection pressure 1.5MPa.
A kind of extra-low-permeability reservoir depth profile control method the most according to claim 1, it is characterised in that
When the injection pressure of the IVth slug is not higher than water injection pressure 2.5MPa, equal proportion raises in granulated gel each
Concentration of component, makes injection pressure be higher than water injection pressure 2.5-4MPa.
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| CN201210466088.7A CN103821474B (en) | 2012-11-16 | 2012-11-16 | Ultra-low permeability oil reservoir deep profile control method |
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| CN104962264A (en) * | 2015-06-04 | 2015-10-07 | 辽宁瑞达石油技术有限公司 | Selective controllable five-slug gel profile adjusting and water plugging agent and profile adjusting and water plugging method |
| CN105298438B (en) * | 2015-10-23 | 2017-12-22 | 克拉玛依新科澳石油天然气技术股份有限公司 | More fine profile control methods in round polymer gel deep |
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| CN105971550A (en) * | 2016-06-27 | 2016-09-28 | 烟台智本知识产权运营管理有限公司 | Profile control method for medium-and-high-permeability reservoir |
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