CN104563987A - Oil well treatment method for improving oil reservoir driving pressure difference - Google Patents
Oil well treatment method for improving oil reservoir driving pressure difference Download PDFInfo
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- CN104563987A CN104563987A CN201410823131.XA CN201410823131A CN104563987A CN 104563987 A CN104563987 A CN 104563987A CN 201410823131 A CN201410823131 A CN 201410823131A CN 104563987 A CN104563987 A CN 104563987A
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- 238000000034 method Methods 0.000 title claims abstract description 43
- 239000003129 oil well Substances 0.000 title abstract description 20
- 239000003921 oil Substances 0.000 claims abstract description 82
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 47
- 238000002347 injection Methods 0.000 claims abstract description 34
- 239000007924 injection Substances 0.000 claims abstract description 34
- 229920000642 polymer Polymers 0.000 claims abstract description 32
- 239000011435 rock Substances 0.000 claims abstract description 26
- 239000012459 cleaning agent Substances 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 13
- 238000004140 cleaning Methods 0.000 claims abstract description 12
- 239000010779 crude oil Substances 0.000 claims abstract description 9
- 238000004132 cross linking Methods 0.000 claims description 25
- 229920001971 elastomer Polymers 0.000 claims description 25
- 230000008569 process Effects 0.000 claims description 20
- 239000003795 chemical substances by application Substances 0.000 claims description 15
- 230000003111 delayed effect Effects 0.000 claims description 14
- 230000009467 reduction Effects 0.000 claims description 14
- 230000015572 biosynthetic process Effects 0.000 claims description 11
- 230000015556 catabolic process Effects 0.000 claims description 11
- 238000006731 degradation reaction Methods 0.000 claims description 11
- -1 amine salt Chemical class 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 150000002169 ethanolamines Chemical class 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- JRKICGRDRMAZLK-UHFFFAOYSA-L peroxydisulfate Chemical compound [O-]S(=O)(=O)OOS([O-])(=O)=O JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 claims description 3
- 229920002401 polyacrylamide Polymers 0.000 claims description 3
- 229920000768 polyamine Polymers 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 150000003242 quaternary ammonium salts Chemical class 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 claims description 3
- 230000035699 permeability Effects 0.000 abstract description 30
- 238000011084 recovery Methods 0.000 abstract description 15
- 238000004519 manufacturing process Methods 0.000 abstract description 13
- 230000000694 effects Effects 0.000 abstract description 10
- 238000006073 displacement reaction Methods 0.000 abstract description 9
- 238000002955 isolation Methods 0.000 abstract 1
- 239000003607 modifier Substances 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 40
- 239000004530 micro-emulsion Substances 0.000 description 8
- 230000008859 change Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 7
- 230000007423 decrease Effects 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000004971 Cross linker Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000037361 pathway Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000002981 blocking agent Substances 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- 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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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
The invention discloses an oil well treatment method for improving oil reservoir driving pressure difference, which comprises the following steps: closing an injection well corresponding to a high aquifer of the oil production well, and injecting a crude oil cleaning agent of the oil layer and an oil field injection water isolation liquid into the oil layer from the oil production well; injecting a rock surface electrical property modifier into the oil reservoir from the production well; injecting a high strength polymer retarded cross-linked gel system from the production well into the reservoir; injecting a self-degrading polymer gel system from the production well into the reservoir; and injecting a gel cleaning system into the oil layer from the oil production well, closing the oil production well and waiting for a preset time. The oil well treatment method for improving the driving pressure difference of the oil reservoir effectively improves the relative permeability of the medium and low permeability layers, enlarges the swept volume, improves the permeability of the medium and low permeability layers, integrally improves the driving pressure difference of the oil reservoir, greatly reduces the water content, greatly increases the displacement pressure, redistributes the flow components of the layers with different permeability, and achieves the technical effect of improving the recovery ratio.
Description
Technical field
The present invention relates to oil recovery field, particularly relate to a kind of well-treating method improving oil reservoir driving pressure reduction.
Background technology
The most of oil field of China is continental deposit, interlayer, layer intrinsic permeability difference are large, during waterflooding extraction, inject water easily advance by leaps and bounds along high permeability zone, make injection water in the vertical with plane on advance uneven, inject water advance by leaps and bounds to oil well too early, cause waterflood, oil reservoir now has defined the water channel of " channelling " at high permeability zone band, oil reservoir energy is reduced, and reduces the ultimate recovery of oil reservoir.
Profile control and water plugging has become a main water and oil control technology in Chinese High water cut and ultra-high water-containing development late stage oil field, profile control relates generally to well superficial part profile control and deep profile controlling, the period of validity of superficial part profile control is short, the injection water capacity easily produces streams, continue along high permeability zone band " channelling ", deep profile controlling mainly adopts heavy dose of injection mode, profile-controlling and plugging agent is needed to be injected into oil deposit deep part, not only plug agent amount is large, and the shear distance of blocking agent process is long, be difficult to keep original character plastic at oil deposit deep part, can find out, in prior art, the water plugging effect of profile control and water plugging technology to High water cut serious heterogeneity sandstone oil reservoir oil well is undesirable.
Therefore, in prior art there is the technical problem undesirable to the water plugging effect of High water cut serious heterogeneity sandstone oil reservoir oil well in profile control and water plugging technology.
Summary of the invention
The embodiment of the present invention improves by providing a kind of the well-treating method that oil reservoir drives pressure reduction, solves the technical problem undesirable to the water plugging effect of High water cut serious heterogeneity sandstone oil reservoir oil well that in prior art, profile control and water plugging technology exists.
Embodiments provide a kind of well-treating method improving oil reservoir driving pressure reduction, it is characterized in that, comprising:
Close the Injection Well corresponding with producing well high aquifer formation, and inject Crude Oil cleaning agent and oilfield injection water insulating liquid from described producing well to oil reservoir;
Inject rock surface from described producing well to oil reservoir and electrically transform agent;
High-strength polymer delayed cross-linking gel rubber system is injected from described producing well to oil reservoir;
Inject from degradation polymer gel rubber system from described producing well to oil reservoir;
Inject gel cleaning system from described producing well to oil reservoir, close described producing well and wait solidifying Preset Time.
Alternatively, the consumption of described Crude Oil cleaning agent is 1/3 of process voids volume, the consumption of described high-strength polymer delayed cross-linking gel rubber system is 1/3 of described process voids volume, the described consumption from degradation polymer gel rubber system is 1/9 of described process voids volume, and the consumption of described gel cleaning system is 1/9 of described process voids volume;
Described process voids volume is calculated by following formula:
V=K π R
2h φ; Wherein, K is processing coefficient, and R is treatment radius, and h is process thickness, and φ is processing layer degree of porosity.
Alternatively, it is at least one in fatty amine salt, ethanolamine salt, polyethylene polyamines salt, quaternary ammonium salt that described rock surface electrically transforms agent, and described high-strength polymer delayed cross-linking gel rubber system is partially hydrolyzed polyacrylamide (PHPA) and Al
3+cross-linking reaction generates, and described is add starchy material in described high-strength polymer delayed cross-linking gel rubber system from degradation polymer gel rubber system, and described gel cleaning system is one or more in peracid salt, persulfate.
The one or more technical schemes provided in the embodiment of the present invention, at least have following technique effect or advantage:
1, the cleaning agent injected can produce microemulsion with crude oil, the microemulsion produced is by follow-up injection liquid, oil deposit deep part deposit is shifted onto towards Injection Well direction from oil well, the original route entering oil reservoir due to cleaning agent is blocked by follow-up polymer gel, during oil well production, these microemulsions being stored in oil reservoir deep can not enter producing well along original route, but be advanced to less permeable layer by follow-up injection water and carry out washing oil, less permeable layer in dredging, thus the relative permeability of less permeable layer in improving further, reach and expand the object that swept volume improves recovery ratio;
2, the rock surface injected electrically is transformed agent and be can be adsorbed on rock surface, the rock surface nonpolar group part that is adsorbed on its polar group freely stretches the cross-linking system that can inject follow-up slug in the solution and produces certain resistance, make it not easily depart from oil reservoir from oil well output, improve the validity of its shutoff;
3, the high-strength polymer delayed cross-linking gel rubber system injected can effective shutoff high permeability formation, and during oil well production, increase the filtrational resistance injecting water, the water forcing Injection Well to inject generation is streamed, and involves to middle less permeable layer, expansion swept volume;
That 4, injects can be cross-linked shutoff system piston type to the propelling of oil reservoir deep to main body on the one hand from degradation polymer gel rubber system, and meeting broken glue voluntarily after this system plastic, avoids causing producing well near wellbore zone to block on the other hand;
Injection process can be entered the cross-linking system degraded of less permeable layer by gel cleaning system on a small quantity that 5, inject, prevents from causing less permeable layer blocking near wellbore zone, has less permeable layer permeability in efficient recovery;
6, overall can improve oil reservoir and drive pressure reduction, moisturely significantly to decline, displacement pressure significantly rises, the shunt volume of different permeable layer is redistributed, high permeability formation liquid measure significantly reduces, and middle less permeable layer liquid measure improves, and ultimate recovery comparatively water drive improves more than 10 percentage points.
Accompanying drawing explanation
The flow chart of the well-treating method of the raising oil reservoir driving pressure reduction that Fig. 1 provides for the embodiment of the present invention
The effect schematic diagram of the well-treating method of the raising oil reservoir driving pressure reduction that Fig. 2 provides for the embodiment of the present invention;
The core physical simulation test oil displacement efficiency curve map that Fig. 3 provides for the embodiment of the present invention;
Different permeable layer flows, oil mass, moisture change curve that Fig. 4 provides for the embodiment of the present invention.
Detailed description of the invention
The embodiment of the present invention improves by providing a kind of the well-treating method that oil reservoir drives pressure reduction, solves the technical problem undesirable to the water plugging effect of High water cut serious heterogeneity sandstone oil reservoir oil well that in prior art, profile control and water plugging technology exists.
Please refer to Fig. 1, Fig. 1 is the flow chart of the well-treating method of the raising oil reservoir driving pressure reduction that the embodiment of the present invention provides, and as shown in Figure 1, the method comprises:
S1: close the Injection Well corresponding with producing well high aquifer formation, and inject Crude Oil cleaning agent and oilfield injection water insulating liquid from producing well to oil reservoir, carry out washing oil on the one hand, adsorb at rock surface so that the rock surface of follow-up injection electrically transforms agent, the cleaning agent injected on the other hand can with crude oil generation emulsification, the microemulsion produced is by follow-up injection liquid, oil deposit deep part deposit is shifted onto towards Injection Well direction from oil well, the original route entering oil reservoir due to cleaning agent is blocked by follow-up polymer gel, during oil well production, these microemulsions being stored in oil reservoir deep can not enter producing well along original route, but be advanced to less permeable layer by follow-up injection water and carry out washing oil, less permeable layer in dredging, thus the relative permeability of less permeable layer in improving further, reach and expand the object that swept volume improves recovery ratio,
S2: inject rock surface from producing well to oil reservoir and electrically transform agent, because the permeability at current predominant pathway place is higher, resistance is minimum, the rock surface injected electrically is transformed agent and preferentially can be entered " channelling " passage, and be adsorbed on rock surface, freely stretch the cross-linking system that can inject follow-up slug in the solution produce certain resistance because its polar group is adsorbed on rock surface nonpolar group part, make it not easily depart from oil reservoir from oil well output, improve shutoff validity;
S3: inject high-strength polymer delayed cross-linking gel rubber system from producing well to oil reservoir, the water-insoluble shutoff current predominant pathway that cross-linking reaction generates, during oil well production, increase the filtrational resistance injecting water, the water forcing Injection Well to inject produces and streams, involve to middle less permeable layer, and expand swept volume further;
S4: inject from degradation polymer gel rubber system from producing well to oil reservoir, can be cross-linked shutoff system piston type to main body on the one hand and advance to oil reservoir deep, and meeting broken glue voluntarily after this system plastic, avoids causing producing well near wellbore zone to block on the other hand;
S5: inject gel cleaning system from producing well to oil reservoir, the cross-linking system degraded of middle less permeable layer can be entered on a small quantity in injection process, prevent from causing less permeable layer blocking near wellbore zone, there is less permeable layer permeability in efficient recovery, then close producing well and wait solidifying Preset Time as 3-4 days, namely can open Injection Well and producing well, namely can carry out normally oil extraction operation.
Pass through above-mentioned steps, effectively improve the relative permeability of middle less permeable layer, expand swept volume, improve the permeability of middle less permeable layer, the overall oil reservoir that improves drives pressure reduction, moisturely significantly to decline, displacement pressure significantly rises, the shunt volume of different permeable layer is redistributed, high permeability formation liquid measure significantly reduces, middle less permeable layer liquid measure improves, reach the technique effect improving recovery ratio, with taken measures by Injection Well to improve compared with injection well pressure as added water shutoff agent etc., there is pressure release point in the mode of being taken measures by Injection Well, at Injection Well Ex post, injection water is walked around after between treatment region and still can be entered water breakthrough layer, the permeability of less permeable layer in can not effectively improving.
In order to better understand technique scheme, in ensuing part, by introducing a core physical simulation test, and in conjunction with manual figure and concrete embodiment, technique scheme will be described in detail.
In the present embodiment, rock core adopts three layers of non-homogeneous model, high permeability formation permeability 3000mD, middle infiltration layer permeability 1500mD, low-permeability layer permeability 500mD; Model parameter: length 60cm, width 9cm, thickness 4.5cm.
Test procedure:
(1) perm-plug method measuring rock core is 1430mD;
(2) found time by rock core 2 hours, weigh 7750kg, the injection water that saturated filtration is good, and weigh 8200kg, and voids volume is 450mL, and calculating degree of porosity is 18.5%;
(3) with 1mL/min, 2mL/min speed water drive, record displacement pressure, calculating average water phase permeability is 1237mD;
(4) rock core is placed on constant temperature more than 12 hours in 58 DEG C of insulating boxs;
(5) saturated oils, to exporting not water outlet, displaces water 365mL altogether, and calculating initial oil saturation is 81%, puts air aging 24 hours;
(6) water drive oil is to rock core outlet moisture 99%, and displacement pressure is 0.061MPa, calculates waterflood recovery efficiency factor 31.1%;
(7) rock core is carried out to the well-treating method process of the raising oil reservoir driving pressure reduction that the embodiment of the present invention provides, process volume is that (0.1PV cleaning agent+0.15PV rock surface electrically transforms agent+0.15PV cross-linking system+0.05PV stifled system+0.05PV tail portion reason system temporarily to 0.5PV, wherein, PV is the abbreviation of pore volume, translator of Chinese is pore volume injected), process voids volume is calculated by following formula:
wherein detergent concentration is 0.5%, it is 0.4% that rock surface electrically transforms agent concentration, high-strength polymer delayed cross-linking gel rubber system (polymer concentration 3000mg/L+ crosslinker concentration is 800mg/L), from degradation polymer gel rubber system (polymer concentration 1500mg/L+ crosslinker concentration is 100mg/L+ stifled additive 5000mg/L temporarily), gel cleaning system concentration is 0.2%; Its treatment effect schematic diagram as shown in Figure 2, wherein, it is at least one in fatty amine salt, ethanolamine salt, polyethylene polyamines salt, quaternary ammonium salt that rock surface electrically transforms agent, high-strength polymer delayed cross-linking gel rubber system is that partially hydrolyzed polyacrylamide (PHPA) and Al3+ cross-linking reaction generate, be add starchy material in high-strength polymer delayed cross-linking gel rubber system from degradation polymer gel rubber system, gel cleaning system is one or more in peracid salt, persulfate;
(8) stop displacement waiting solidifying 24 hours, it should be noted that, due to experiment restriction, this sentences 24 hours for example, does not limit the time of other embodiments;
(9) forward water drive is to 5PV, calculates recovery ratio.
Result of the test shows:
A. adopt and improve after oil reservoir drives the well-treating method of pressure reduction to process, moisturely as shown in Figure 3 maximumly drop to 72% by 99%; Water-flooding pressure rises to 1.1MPa by 0.1MPa, and the highest displacement pressure is 2.4MPa; Ultimate recovery comparatively water drive improves 14.3 percentage points.
B. different permeable layer flow, oil mass, moisture change are obvious
After carrying out physical simulation experiment, the flow of different permeable formation, oil mass, moisture change are as shown in table 1, Fig. 4, and the flow of high permeability formation significantly declines, and moisturely significantly reduce; In, the flow of low-permeability layer increases substantially, rate of change, up to 1300%, moisturely significantly to decline, and minimumly drops to 33.3%.
Table 1 different permeable layer flow, oil mass, moisture change
The one or more technical schemes provided in the invention described above embodiment, at least have following technique effect or advantage:
1, the cleaning agent injected can produce microemulsion with crude oil, the microemulsion produced is by follow-up injection liquid, oil deposit deep part deposit is shifted onto towards Injection Well direction from oil well, the original route entering oil reservoir due to cleaning agent is blocked by follow-up polymer gel, during oil well production, these microemulsions being stored in oil reservoir deep can not enter producing well along original route, but be advanced to less permeable layer by follow-up injection water and carry out washing oil, less permeable layer in dredging, thus the relative permeability of less permeable layer in improving further, reach and expand the object that swept volume improves recovery ratio;
2, the rock surface injected electrically is transformed agent and be can be adsorbed on rock surface, the rock surface nonpolar group part that is adsorbed on its polar group freely stretches the cross-linking system that can inject follow-up slug in the solution and produces certain resistance, make it not easily depart from oil reservoir from oil well output, improve the validity of its shutoff;
3, the high-strength polymer delayed cross-linking gel rubber system injected can effective shutoff high permeability formation, and during oil well production, increase the filtrational resistance injecting water, the water forcing Injection Well to inject generation is streamed, and involves to middle less permeable layer, expansion swept volume;
That 4, injects can be cross-linked shutoff system piston type to the propelling of oil reservoir deep to main body on the one hand from degradation polymer gel rubber system, and meeting broken glue voluntarily after this system plastic, avoids causing producing well near wellbore zone to block on the other hand;
Injection process can be entered the cross-linking system degraded of less permeable layer by gel cleaning system on a small quantity that 5, inject, prevents from causing less permeable layer blocking near wellbore zone, has less permeable layer permeability in efficient recovery;
6, overall can improve oil reservoir and drive pressure reduction, moisturely significantly to decline, displacement pressure significantly rises, the shunt volume of different permeable layer is redistributed, high permeability formation liquid measure significantly reduces, and middle less permeable layer liquid measure improves, and ultimate recovery comparatively water drive improves more than 10 percentage points.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (3)
1. improve the well-treating method that oil reservoir drives pressure reduction, it is characterized in that, comprising:
Close the Injection Well corresponding with producing well high aquifer formation, and inject Crude Oil cleaning agent and oilfield injection water insulating liquid from described producing well to oil reservoir;
Inject rock surface from described producing well to oil reservoir and electrically transform agent;
High-strength polymer delayed cross-linking gel rubber system is injected from described producing well to oil reservoir;
Inject from degradation polymer gel rubber system from described producing well to oil reservoir;
Inject gel cleaning system from described producing well to oil reservoir, close described producing well and wait solidifying Preset Time.
2. the method for claim 1, it is characterized in that, the consumption of described Crude Oil cleaning agent is 1/3 of process voids volume, the consumption of described high-strength polymer delayed cross-linking gel rubber system is 1/3 of described process voids volume, the described consumption from degradation polymer gel rubber system is 1/9 of described process voids volume, and the consumption of described gel cleaning system is 1/9 of described process voids volume;
Described process voids volume is calculated by following formula:
V=K π R
2h φ; Wherein, K is processing coefficient, and R is treatment radius, and h is process thickness, and φ is processing layer degree of porosity.
3. the method for claim 1, it is characterized in that, it is at least one in fatty amine salt, ethanolamine salt, polyethylene polyamines salt, quaternary ammonium salt that described rock surface electrically transforms agent, and described high-strength polymer delayed cross-linking gel rubber system is partially hydrolyzed polyacrylamide (PHPA) and Al
3+cross-linking reaction generates, and described is add starchy material in described high-strength polymer delayed cross-linking gel rubber system from degradation polymer gel rubber system, and described gel cleaning system is one or more in peracid salt, persulfate.
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| CN201410823131.XA CN104563987A (en) | 2014-12-25 | 2014-12-25 | Oil well treatment method for improving oil reservoir driving pressure difference |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105545268A (en) * | 2015-12-30 | 2016-05-04 | 中国石油天然气股份有限公司 | Method for improving driving pressure difference of microbial flooding reservoir |
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|---|---|---|---|---|
| US4475593A (en) * | 1983-01-24 | 1984-10-09 | Getty Oil Company | Method for profile control and conformance correction |
| CN101876241A (en) * | 2009-04-30 | 2010-11-03 | 中国石油天然气股份有限公司 | Method for improving water drive recovery ratio of positive rhythm thick oil layer |
| CN102071003A (en) * | 2009-11-24 | 2011-05-25 | 王健 | High temperature resistant delay crosslinking polymer deep profile control agent |
| CN102504790A (en) * | 2011-11-09 | 2012-06-20 | 蒋官澄 | Method for reversing gas humidity on surface of rock core by using cationic fluorocarbon surfactant |
| CN103821474A (en) * | 2012-11-16 | 2014-05-28 | 中国石油天然气股份有限公司 | Ultra-low permeability oil reservoir deep profile control method |
-
2014
- 2014-12-25 CN CN201410823131.XA patent/CN104563987A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4475593A (en) * | 1983-01-24 | 1984-10-09 | Getty Oil Company | Method for profile control and conformance correction |
| CN101876241A (en) * | 2009-04-30 | 2010-11-03 | 中国石油天然气股份有限公司 | Method for improving water drive recovery ratio of positive rhythm thick oil layer |
| CN102071003A (en) * | 2009-11-24 | 2011-05-25 | 王健 | High temperature resistant delay crosslinking polymer deep profile control agent |
| CN102504790A (en) * | 2011-11-09 | 2012-06-20 | 蒋官澄 | Method for reversing gas humidity on surface of rock core by using cationic fluorocarbon surfactant |
| CN103821474A (en) * | 2012-11-16 | 2014-05-28 | 中国石油天然气股份有限公司 | Ultra-low permeability oil reservoir deep profile control method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105545268A (en) * | 2015-12-30 | 2016-05-04 | 中国石油天然气股份有限公司 | Method for improving driving pressure difference of microbial flooding reservoir |
| CN105545268B (en) * | 2015-12-30 | 2018-11-16 | 中国石油天然气股份有限公司 | Method for improving driving pressure difference of microbial flooding reservoir |
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