CA2286140A1 - Acid surfactant composition - Google Patents
Acid surfactant composition Download PDFInfo
- Publication number
- CA2286140A1 CA2286140A1 CA002286140A CA2286140A CA2286140A1 CA 2286140 A1 CA2286140 A1 CA 2286140A1 CA 002286140 A CA002286140 A CA 002286140A CA 2286140 A CA2286140 A CA 2286140A CA 2286140 A1 CA2286140 A1 CA 2286140A1
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- CA
- Canada
- Prior art keywords
- composition
- solvent
- dissolving
- water
- acid
- 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.)
- Abandoned
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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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/72—Eroding chemicals, e.g. acids
-
- 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
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)
- Detergent Compositions (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
Surface-active acidic composition for the treatment of bottom hole zone of injection and producing wells to increase permeability and filtration properties of the layer. To increase dissolving and washing of asphalt, gum, paraffin and clay (AGPC) sediments (mud), special ingredients should be added to the mixture of hydrochloric and hydrofluoric acids and non-ionic surfactantsolvent, such as aromatic hydrocarbon solvent (e.g., toluene) or the mix of halogen solvents. During the treatment of the well bottom hole zone such a way influence of acids on clay plugs becomes more effective due to dissolving of hydrophobic AGPC sediments. Presence of nonionic surfactant in this composition, it might be hydroxyethylated alkyl phenol - A.PHI. 9-12) causes better solubility and more uniform (steady) distribution of AGPG solvent in the water-acidic composition as a stable low viscous micro-emulsion oil-in-water type with high peptic and inhibiting properties.
Description
ACID SURFACTANT COMPOSITION
The invention is referred to the oil production industry and can be applied to treat the near well bore area.
A composition is known for treatment of the near well bore area of the reservoir which contains a surfactant, for example, 0.25 - 3.0% of oil or synthetic sulphonate and hydrochloric acid with the concentration of 5-24% (USSR Patent Ns 1161699, E
43/22, 1984).
The disadvantage of the aforementioned composition is not high enough washing properties for asphaltene-resin and paraffin deposits in the near well bore area of the well and insufficient decrease in water permeability of highly permeable zones of heterogeneous reservoirs.
The closest to the proposed invention in its technical essence and achieved results is another composition for treatment of the near well bore area (USSR Patent l~
1571224, E
21 B 43/27, 1998).
The disadvantage of this method is insufficient ei~ectiveness of treatment of the filtrates in the near well bore area of highly flooded wells.
The objective of the invention is to raise the effectiveness of the near well bore area treatment of highly flooded wells through high washing and solvent properties of the applied composition.
The objective is attained due to the fact that unlike known compositions the applied composition that contains inhibited hydrochloric acid and hydrofluoric acid, non ionic surfactant and water, in addition contains emulsified aromatic or haloderivative hydrocarbon with the following ratio of components, % of mass, as a solvent of asphaltene-resin and paraffin deposits (ARPD):
Inhibited hydrochloric acid (HCL) 5.0-23.0 Hydrofluoric acid 2.0-10.0 Non ionic surfactant 1.0-5.0 ARPD solvent 5.0-25.0 Water remaining portion To prepare this acid surfactant composition we use: hydrochloric acid (standard TU
4814-82); hydrofluoric acid (T'U 1426-84); oxiethylated alkyl phenol, for example, Neonol AF 9-12 brand as a non-ionic surfactant and as an ASPD solvent a fiaction of aromatic hydrocarbons or APK-product manufactured by '~Chimprom" (TU 2122-199-05-76-34-68-94) which is a mixture of haloderivative compounds. The composition is prepared as follows: initially a calculated amount of non-ionic surfactant is dissolved in an aromatic or haloderivative solvent or a mixture of these solvents. Later resulted ., CA 02286140 1999-07-29 surfactant solution is mixed with water that has a prior added estimated amount of hydrochloric acid and hydrofluoric acid.
Unlike known surfactant and acid compounds for treatment of the near well bore area the present composition which presents a well filtering in the porous media micro emulsion system, does not only clean the near well bore area from salts and drill mud residue deposits but also peptizes and dissolves paraffin, resin and asphaltene deposits. Besides, the composition preserves its high oil displacement properties after injection into the reservoir and after it is neutralized.
For comparative evaluation of effectiveness of the compositions we prepared the compounds according the invention and the prototype (AC J~ 1571224) The presented composition is prepared according to the procedure described above. The prototype is prepared dissolving neonole and sulphanole one after another in diluted hydrochloric acid with ratios described in the invention formula.
A part of prepared acid surfactant compositions was analyzed for their dissolving properties as compared to an artificially blended mixture containing calcium carbonate (50% of mass), clay (20'/° of mass) and ARPD (30% of mass).
The dissolving ability (Pc) of the compositions was evaluated according to the intensity of the chemical reaction between them and calcium carbonate and the decrease in the residual weight of dissolved mixture after the chemical reaction ended based on the formula (1):
Pc = [(Go - Gk) x l oo] /Go, Go: treated mixture weight, g.
Gk: undissolved residue after the mixture was treated, g.
Oil displacement ability of compared acid surfactant compositions was analyzed after they were neutralized by calcium carbonate on a reservoir model 50 cm long and 1.1 cm in diameter made of silica sand with 36% porosity and 3.8 mkm2 water permeability.
Initially the model was saturated with produced water with 12.7~/°
total salt content. Later water was displaced by oil with 9.2 cSp viscosity at 20°C. Oil then was displaced by the same produced water to the maximum water cut in fluid samples coming from the core.
Final displacement reached f>S-70%.
Thus treated cores were analyzed for effectiveness of residual oil washing by compared neLltral compositions through their injection in the amount of one pore volume and later displacement of the injected substance by produced water until oil stopped being washed out of the core. Tests were run at room temperature (20 t 5 °C).
.. CA 02286140 1999-07-29 Oil displacemem ability of compared compositions was evaluated by the volume of incremental oil produced from the core which was presented as a displacement ratio NK
in volume percent of residual oil after flood.
Test results for the developed and available compositions are presented in Table 1.
Based on the data provided in the Table the proposed composition unlike its prototype has a higher dissolving ability not only related to the calcium carbonate salts deposits, but at equal content of non-ionic surfactant (comparing compositions 2 and 5) it has a 1.5 times better dissolving ability for ARPD. Oil washing properties of composition 2 are 2 times higher that those of composition 5.
At higher HCL content (23% of mass) the proposed composition (composition 3) in comparison with the prototype (composition 6) has clearly determined dissolving properties towards clay particles (due to HF presence) and 100'/0 oil washing properties due to a higher content of non-ionic surfactant (5% of mass) and effectiveness of APK
solvent (25% of mass). Compared prototype (composition 6) dissolves only 65%
of mass of the artificially blended mixture even at a total content of ionic and non-ionic s<ufactaats of 5.3% of mass and HCL of 23 % of mass. This shows that the dissolving ability of this composition towards ARPD and clay components (allowing for 100% of calcium carbonate dissolving) does not exceed 15% of their mass content.
Application: oil production. The composition can be used for treatment of the near well bore area of injection and production wells to increase permeability and filtration propeaties of the reservoir. The essence of the invention: modifying dissolving and washing properties of the composition towards asphaltene-resin, paraffin and clay deposits through adding into the mixture inhibited hydrochloric and hydrofluoric acid and non-ionic surfactant, an effective aromatic hydrocarbon solvent (toluene, for instance) or a blend of haloderivative solvents mamifact<u~d by '~Chlorprom" according to standard TU 2122-199-OS-76-34-68-94). While treating the near well bore area with the described composition as a result of ARPR (asphaltene-resin and paraffin residue) dissolving more effective chemical impact of the above acids on filtrate damaged areas of the reservoir takes place. Non-ionic surfactant (for example, neonole AF 9-12) present in the composition provides equal distribution of the ARPR solvent in water and acid composition due to the solubility effect. The solvem is distributed as a stable low viscosity micro emulsion oil in water type with high peptizing and inhibiting properties.
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The invention is referred to the oil production industry and can be applied to treat the near well bore area.
A composition is known for treatment of the near well bore area of the reservoir which contains a surfactant, for example, 0.25 - 3.0% of oil or synthetic sulphonate and hydrochloric acid with the concentration of 5-24% (USSR Patent Ns 1161699, E
43/22, 1984).
The disadvantage of the aforementioned composition is not high enough washing properties for asphaltene-resin and paraffin deposits in the near well bore area of the well and insufficient decrease in water permeability of highly permeable zones of heterogeneous reservoirs.
The closest to the proposed invention in its technical essence and achieved results is another composition for treatment of the near well bore area (USSR Patent l~
1571224, E
21 B 43/27, 1998).
The disadvantage of this method is insufficient ei~ectiveness of treatment of the filtrates in the near well bore area of highly flooded wells.
The objective of the invention is to raise the effectiveness of the near well bore area treatment of highly flooded wells through high washing and solvent properties of the applied composition.
The objective is attained due to the fact that unlike known compositions the applied composition that contains inhibited hydrochloric acid and hydrofluoric acid, non ionic surfactant and water, in addition contains emulsified aromatic or haloderivative hydrocarbon with the following ratio of components, % of mass, as a solvent of asphaltene-resin and paraffin deposits (ARPD):
Inhibited hydrochloric acid (HCL) 5.0-23.0 Hydrofluoric acid 2.0-10.0 Non ionic surfactant 1.0-5.0 ARPD solvent 5.0-25.0 Water remaining portion To prepare this acid surfactant composition we use: hydrochloric acid (standard TU
4814-82); hydrofluoric acid (T'U 1426-84); oxiethylated alkyl phenol, for example, Neonol AF 9-12 brand as a non-ionic surfactant and as an ASPD solvent a fiaction of aromatic hydrocarbons or APK-product manufactured by '~Chimprom" (TU 2122-199-05-76-34-68-94) which is a mixture of haloderivative compounds. The composition is prepared as follows: initially a calculated amount of non-ionic surfactant is dissolved in an aromatic or haloderivative solvent or a mixture of these solvents. Later resulted ., CA 02286140 1999-07-29 surfactant solution is mixed with water that has a prior added estimated amount of hydrochloric acid and hydrofluoric acid.
Unlike known surfactant and acid compounds for treatment of the near well bore area the present composition which presents a well filtering in the porous media micro emulsion system, does not only clean the near well bore area from salts and drill mud residue deposits but also peptizes and dissolves paraffin, resin and asphaltene deposits. Besides, the composition preserves its high oil displacement properties after injection into the reservoir and after it is neutralized.
For comparative evaluation of effectiveness of the compositions we prepared the compounds according the invention and the prototype (AC J~ 1571224) The presented composition is prepared according to the procedure described above. The prototype is prepared dissolving neonole and sulphanole one after another in diluted hydrochloric acid with ratios described in the invention formula.
A part of prepared acid surfactant compositions was analyzed for their dissolving properties as compared to an artificially blended mixture containing calcium carbonate (50% of mass), clay (20'/° of mass) and ARPD (30% of mass).
The dissolving ability (Pc) of the compositions was evaluated according to the intensity of the chemical reaction between them and calcium carbonate and the decrease in the residual weight of dissolved mixture after the chemical reaction ended based on the formula (1):
Pc = [(Go - Gk) x l oo] /Go, Go: treated mixture weight, g.
Gk: undissolved residue after the mixture was treated, g.
Oil displacement ability of compared acid surfactant compositions was analyzed after they were neutralized by calcium carbonate on a reservoir model 50 cm long and 1.1 cm in diameter made of silica sand with 36% porosity and 3.8 mkm2 water permeability.
Initially the model was saturated with produced water with 12.7~/°
total salt content. Later water was displaced by oil with 9.2 cSp viscosity at 20°C. Oil then was displaced by the same produced water to the maximum water cut in fluid samples coming from the core.
Final displacement reached f>S-70%.
Thus treated cores were analyzed for effectiveness of residual oil washing by compared neLltral compositions through their injection in the amount of one pore volume and later displacement of the injected substance by produced water until oil stopped being washed out of the core. Tests were run at room temperature (20 t 5 °C).
.. CA 02286140 1999-07-29 Oil displacemem ability of compared compositions was evaluated by the volume of incremental oil produced from the core which was presented as a displacement ratio NK
in volume percent of residual oil after flood.
Test results for the developed and available compositions are presented in Table 1.
Based on the data provided in the Table the proposed composition unlike its prototype has a higher dissolving ability not only related to the calcium carbonate salts deposits, but at equal content of non-ionic surfactant (comparing compositions 2 and 5) it has a 1.5 times better dissolving ability for ARPD. Oil washing properties of composition 2 are 2 times higher that those of composition 5.
At higher HCL content (23% of mass) the proposed composition (composition 3) in comparison with the prototype (composition 6) has clearly determined dissolving properties towards clay particles (due to HF presence) and 100'/0 oil washing properties due to a higher content of non-ionic surfactant (5% of mass) and effectiveness of APK
solvent (25% of mass). Compared prototype (composition 6) dissolves only 65%
of mass of the artificially blended mixture even at a total content of ionic and non-ionic s<ufactaats of 5.3% of mass and HCL of 23 % of mass. This shows that the dissolving ability of this composition towards ARPD and clay components (allowing for 100% of calcium carbonate dissolving) does not exceed 15% of their mass content.
Application: oil production. The composition can be used for treatment of the near well bore area of injection and production wells to increase permeability and filtration propeaties of the reservoir. The essence of the invention: modifying dissolving and washing properties of the composition towards asphaltene-resin, paraffin and clay deposits through adding into the mixture inhibited hydrochloric and hydrofluoric acid and non-ionic surfactant, an effective aromatic hydrocarbon solvent (toluene, for instance) or a blend of haloderivative solvents mamifact<u~d by '~Chlorprom" according to standard TU 2122-199-OS-76-34-68-94). While treating the near well bore area with the described composition as a result of ARPR (asphaltene-resin and paraffin residue) dissolving more effective chemical impact of the above acids on filtrate damaged areas of the reservoir takes place. Non-ionic surfactant (for example, neonole AF 9-12) present in the composition provides equal distribution of the ARPR solvent in water and acid composition due to the solubility effect. The solvem is distributed as a stable low viscosity micro emulsion oil in water type with high peptizing and inhibiting properties.
a~
.
E" 00 c~
oo ooo . .
.
G ' O ~
~
v M
v ~T
O
T
..~', .;., d4 Cr"
r ..
O O O O
O O
"' O ~1 O ~1 V t!1 V1 A 00 v p 00 v O~ ~O
i 1 O O I~
O O
t~
t~
tV
n 00 Ov (~ 00 M l'~
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~
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~ U o 0 M
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~, t~.
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Claims (2)
1. Acid surfactant composition for bore hole treats of oil wells, including the mixture of inhibited hydrochloric and hydrofluoric acids, non-ionogenic surfactant substance and water, that differs in the following, that in order to increase the dissolving and oil washing-out capabilities, the composition, additionally, in emulsified condition.
contains the effective AWPS (asphalt-wax and paraffin sediments) solvent with the following ratio of the components (% mass):
~ Inhibited hydrochloric acid (calculated for HCI) -5.0 - 23.0 ~ Hydrofluoric acid - 2.0 - 10.0 ~ Non-inogenic surfactant substance -1.0 - 5.0 ~ AWSP solvent -5.0 - 25.0 ~ Water - the rest
contains the effective AWPS (asphalt-wax and paraffin sediments) solvent with the following ratio of the components (% mass):
~ Inhibited hydrochloric acid (calculated for HCI) -5.0 - 23.0 ~ Hydrofluoric acid - 2.0 - 10.0 ~ Non-inogenic surfactant substance -1.0 - 5.0 ~ AWSP solvent -5.0 - 25.0 ~ Water - the rest
2. Acid surfactant composition for bottom hole treatments of oil wells as per Claim # 1, that differs in the following; that as a AWSP solvent they use the aromatic hydrocarbon fraction (e.g. toluene- xylene fraction) or the mixture of gala-derived solvents (e.g. APK product, produced by "CHIMPROM" JSC as per Spec.# TY 2122-199-05-76-34-68-94).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RU98105909A RU2131972C1 (en) | 1998-03-25 | 1998-03-25 | Acid surfactant composition for treatment of bottom-hole zone |
| RU98105909 | 1998-03-25 | ||
| PCT/RU1998/000424 WO1999049182A1 (en) | 1998-03-25 | 1998-12-21 | Surface-active acidic composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2286140A1 true CA2286140A1 (en) | 1999-09-30 |
Family
ID=20204117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002286140A Abandoned CA2286140A1 (en) | 1998-03-25 | 1998-12-21 | Acid surfactant composition |
Country Status (3)
| Country | Link |
|---|---|
| CA (1) | CA2286140A1 (en) |
| RU (1) | RU2131972C1 (en) |
| WO (1) | WO1999049182A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103890132A (en) * | 2011-09-13 | 2014-06-25 | 路博润高级材料公司 | Surfactant responsive micro-gels |
Families Citing this family (32)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EA008567B1 (en) * | 2005-05-16 | 2007-06-29 | Елена Александровна Румянцева | Acidic surfactant for treating well bottom zone |
| US9222013B1 (en) | 2008-11-13 | 2015-12-29 | Cesi Chemical, Inc. | Water-in-oil microemulsions for oilfield applications |
| RU2494136C1 (en) * | 2012-03-07 | 2013-09-27 | Общество с ограниченной ответственностью "ЛУКОЙЛ-Инжиниринг" (ООО "ЛУКОЙЛ-Инжиниринг") | Surface-active acid composition for treatment of carbonate basins |
| EP2838970B1 (en) | 2012-04-15 | 2016-12-28 | Flotek Chemistry, LLC | Surfactant formulations for foam flooding |
| US11407930B2 (en) | 2012-05-08 | 2022-08-09 | Flotek Chemistry, Llc | Compositions and methods for enhancement of production of liquid and gaseous hydrocarbons |
| US9200192B2 (en) | 2012-05-08 | 2015-12-01 | Cesi Chemical, Inc. | Compositions and methods for enhancement of production of liquid and gaseous hydrocarbons |
| US10053619B2 (en) | 2013-03-14 | 2018-08-21 | Flotek Chemistry, Llc | Siloxane surfactant additives for oil and gas applications |
| US10941106B2 (en) | 2013-03-14 | 2021-03-09 | Flotek Chemistry, Llc | Methods and compositions incorporating alkyl polyglycoside surfactant for use in oil and/or gas wells |
| US10287483B2 (en) | 2013-03-14 | 2019-05-14 | Flotek Chemistry, Llc | Methods and compositions for use in oil and/or gas wells comprising a terpene alcohol |
| US9868893B2 (en) | 2013-03-14 | 2018-01-16 | Flotek Chemistry, Llc | Methods and compositions for use in oil and/or gas wells |
| US10000693B2 (en) | 2013-03-14 | 2018-06-19 | Flotek Chemistry, Llc | Methods and compositions for use in oil and/or gas wells |
| US11254856B2 (en) | 2013-03-14 | 2022-02-22 | Flotek Chemistry, Llc | Methods and compositions for use in oil and/or gas wells |
| US9464223B2 (en) | 2013-03-14 | 2016-10-11 | Flotek Chemistry, Llc | Methods and compositions for use in oil and/or gas wells |
| US10717919B2 (en) | 2013-03-14 | 2020-07-21 | Flotek Chemistry, Llc | Methods and compositions for use in oil and/or gas wells |
| US9321955B2 (en) | 2013-06-14 | 2016-04-26 | Flotek Chemistry, Llc | Methods and compositions for stimulating the production of hydrocarbons from subterranean formations |
| US9068108B2 (en) | 2013-03-14 | 2015-06-30 | Cesi Chemical, Inc. | Methods and compositions for stimulating the production of hydrocarbons from subterranean formations |
| US11180690B2 (en) | 2013-03-14 | 2021-11-23 | Flotek Chemistry, Llc | Diluted microemulsions with low surface tensions |
| US10590332B2 (en) | 2013-03-14 | 2020-03-17 | Flotek Chemistry, Llc | Siloxane surfactant additives for oil and gas applications |
| US10421707B2 (en) | 2013-03-14 | 2019-09-24 | Flotek Chemistry, Llc | Methods and compositions incorporating alkyl polyglycoside surfactant for use in oil and/or gas wells |
| US9428683B2 (en) | 2013-03-14 | 2016-08-30 | Flotek Chemistry, Llc | Methods and compositions for stimulating the production of hydrocarbons from subterranean formations |
| US10577531B2 (en) | 2013-03-14 | 2020-03-03 | Flotek Chemistry, Llc | Polymers and emulsions for use in oil and/or gas wells |
| US9884988B2 (en) | 2013-03-14 | 2018-02-06 | Flotek Chemistry, Llc | Methods and compositions for use in oil and/or gas wells |
| RU2523276C1 (en) * | 2013-09-17 | 2014-07-20 | Общество с ограниченной ответственностью "Татнефть-РемСервис" | Acidising composition for bottomhole formation zone |
| US9890625B2 (en) | 2014-02-28 | 2018-02-13 | Eclipse Ior Services, Llc | Systems and methods for the treatment of oil and/or gas wells with an obstruction material |
| US9890624B2 (en) | 2014-02-28 | 2018-02-13 | Eclipse Ior Services, Llc | Systems and methods for the treatment of oil and/or gas wells with a polymeric material |
| US9505970B2 (en) | 2014-05-14 | 2016-11-29 | Flotek Chemistry, Llc | Methods and compositions for use in oil and/or gas wells |
| CA2898770C (en) | 2014-07-28 | 2019-05-21 | Cesi Chemical, Inc. | Methods and compositions related to gelled layers in oil and/or gas wells |
| RU2643050C2 (en) * | 2015-11-09 | 2018-01-30 | Фарит Фазитович Мухамедьянов | Acid surface-active composition for treating bottom-hole zone of oil and gas wells |
| US10934472B2 (en) | 2017-08-18 | 2021-03-02 | Flotek Chemistry, Llc | Compositions comprising non-halogenated solvents for use in oil and/or gas wells and related methods |
| US11053433B2 (en) | 2017-12-01 | 2021-07-06 | Flotek Chemistry, Llc | Methods and compositions for stimulating the production of hydrocarbons from subterranean formations |
| US11104843B2 (en) | 2019-10-10 | 2021-08-31 | Flotek Chemistry, Llc | Well treatment compositions and methods comprising certain microemulsions and certain clay control additives exhibiting synergistic effect of enhancing clay swelling protection and persistency |
| US11512243B2 (en) | 2020-10-23 | 2022-11-29 | Flotek Chemistry, Llc | Microemulsions comprising an alkyl propoxylated sulfate surfactant, and related methods |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4163727A (en) * | 1977-12-05 | 1979-08-07 | Basf Wyandotte Corporation | Acidizing-gel composition |
| NO173146C (en) * | 1984-11-07 | 1993-11-10 | Berol Kemi Ab | PROCEDURE FOR ACID TREATMENT OF AN UNDERGRADUAL FORM |
| SU1571224A1 (en) * | 1988-07-19 | 1990-06-15 | Центральная научно-исследовательская лаборатория Производственного объединения "Укрнефть" | Composition for processing face zone of seam |
| SU1740644A1 (en) * | 1989-11-22 | 1992-06-15 | Башкирский государственный научно-исследовательский и проектный институт нефтяной промышленности | Bottomhole treatment compound |
| RU2047756C1 (en) * | 1992-10-13 | 1995-11-10 | Пермский государственный научно-исследовательский и проектный институт нефтяной промышленности | Method for acid treatment of bottom hole area of formation |
| RU2065950C1 (en) * | 1993-10-27 | 1996-08-27 | Николай Александрович Петров | Method of acid treatment of productive bed |
-
1998
- 1998-03-25 RU RU98105909A patent/RU2131972C1/en not_active IP Right Cessation
- 1998-12-21 CA CA002286140A patent/CA2286140A1/en not_active Abandoned
- 1998-12-21 WO PCT/RU1998/000424 patent/WO1999049182A1/en unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103890132A (en) * | 2011-09-13 | 2014-06-25 | 路博润高级材料公司 | Surfactant responsive micro-gels |
| CN103890132B (en) * | 2011-09-13 | 2017-07-28 | 路博润高级材料公司 | The microgel of surfactant response |
Also Published As
| Publication number | Publication date |
|---|---|
| RU2131972C1 (en) | 1999-06-20 |
| WO1999049182A1 (en) | 1999-09-30 |
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| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |