CN103627377A - Oil layer protective solution - Google Patents
Oil layer protective solution Download PDFInfo
- Publication number
- CN103627377A CN103627377A CN201210302496.9A CN201210302496A CN103627377A CN 103627377 A CN103627377 A CN 103627377A CN 201210302496 A CN201210302496 A CN 201210302496A CN 103627377 A CN103627377 A CN 103627377A
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- CN
- China
- Prior art keywords
- oil layer
- oil
- protection liquid
- layer protection
- stirring
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Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
-
- 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
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
Abstract
The invention discloses an oil layer protective solution, which is composed of water, a tackifier, a filtrate reducer, an anti-swelling agent, a surfactant, and a bactericide. The protective solution utilizes a synergetic effect of the chemical agents mentioned above so as to realize multiple protective functions on oil layer. The preparation method of the oil layer protective solution comprises the following steps: adding a surfactant and a bactericide into clean water, stirring so as to prepare a basic solution; mixing a tackifier, a filtrate reducer, and an anti-swelling agent according to a ratio so as to make into a uniform solid mixture, then adding the solid mixture into the basic solution with stirring, and stirring to dissolve the mixture so as to form the finished product. The protective solution is used during the process of workover operations such as well killing, well washing, sand washing, pump inspecting, electricity inspecting, electricity to pumping transferring, pumping to electricity transferring, blowing to pumping transferring, blowing to electricity transferring, pump upgrading, and pump depth deepening to protect the oil reservoir so as to prevent the oil reservoir from damages caused by workover fluid.
Description
Technical field
The present invention relates to a kind of oil layer protection liquid for oil-field development workover treatment process.
Background technology
Well workover is one and normally produces the releasing fault of carrying out, the work of improving borehole condition for recovering Oil/gas Well.Its objective is and remove down-hole accident, safeguard well bore and improve the fuel-displaced condition of Oil/gas Well, recover the fuel-displaced ability of oil well.It is to improve per-well production and recovery ratio, and important measures that extend manufacture cycle are also the important means of excavating old well potentiality, the new layer of discovery position, expanding exploration results.Along with oil-gas field enters the exploitation middle and later periods, well workover become one important and work frequently.
At present, domestic each oil field workover fluid used mainly contain crude oil after treatment deviate from water, without 6 class systems such as solid phase clear brine, polymkeric substance, oil base, acidic group and emulsions.Wherein, oil base, acidic group and emulsion because price is high, construction inconvenience do not have been used in a large scale, practical application is more be crude oil after treatment deviate from water, without solid phase clear brine and polymeric system.Though wherein crude oil is after treatment deviate from water and unmanned for adding the injury of solid phase and price comparatively cheap without solid phase clear brine, its viscosity is low, solids-carrying capacity is poor, clean that borehole ability is weak, filter loss is high, enter oil reservoir easily with emulsification of crude oil, enter low-permeability layer and easily cause water blocking damage, inorganic salt stablize clay time water-sensitive short, that can not prevent subsequent job to injure and be not suitable for missing more serious oil reservoir.Polymeric system has overcome some shortcomings without solid phase clear brine, but current polymeric system is not described the raising situation of the row's of returning ability quantitatively, do not consider this infringement bringing in the absorption of stratum filtration channel surface of polymkeric substance, should try every possible means to be removed yet; Above-mentioned workover fluid is not all considered the impact on environment simultaneously.
Summary of the invention
The defect existing for overcoming above-mentioned prior art; the technical problem to be solved in the present invention is to provide a kind of oil layer protection liquid; solve the multiple infringement due to workover fluid, reservoir being brought in oil and water well workover treatment process; cause the problem that output after operation decubation is long, recovery rate is low, improve the environment friendly of workover fluid simultaneously.
For solving the problems of the technologies described above, oil layer protection liquid of the present invention, is comprised of the component of following ratio of quality and the number of copies: water 100, tackifier 0.3～0.4, fluid loss agent 1～2, expansion-resisting agent 2～3, tensio-active agent 0.03～0.05, sterilant 0.01.
Above-mentioned water is clear water.
Above-mentioned tackifier are hydroxypropylguar gum.
Above-mentioned fluid loss agent is hydroxypropylated starch.
Above-mentioned expansion-resisting agent is palmityl trimethyl ammonium chloride.
Above-mentioned tensio-active agent is polyoxyethylene nonylphenol ether.
Above-mentioned sterilant is 1427 cats products.
Oil layer protection liquid of the present invention have density adjustable, without solid phase, low leak-off, suppress by force,, interfacial tension low easily return row good with reservoir compatibleness, the feature such as drill core permeability rate recovery rate is high and environmental friendliness, cost be relatively low.Specific as follows:
1. viscosity can be controlled in 50～200mPas, can play clean, take bits effect;
2.API filter loss≤15ml/30min, reduces filtrate to formation damage;
3. anti-swollen rate >=90%, reduces the infringement that hydration and expansion of clay brings;
4. interfacial tension≤3mN/m, is conducive to liquid and returns row;
5. resume permeability rate >=90%, oil reservoir overall damage is little;
6. automatically degradable;
7.EC
50>=1 * 10
5mg/L, lifeless matter toxicity, to environment without injury.
Embodiment
The required component of oil layer protection liquid of the present invention is industrial goods, can purchase from market.
Below in conjunction with productive experiment example and concrete application process, the present invention is described in further detail:
Embodiment 1
By following proportioning, prepare raw material:
30 tons, clear water, hydroxypropylguar gum 90kg, hydroxypropylated starch 450kg, palmityl trimethyl ammonium chloride 900kg, polyoxyethylene nonylphenol ether 15kg, 1427 cats product 3kg.
Production method is as follows:
First in clear water, add polyoxyethylene nonylphenol ether (tensio-active agent) and 1427 cats products (sterilant), stir 10min and be mixed with base fluid, again hydroxypropylguar gum (tackifier), hydroxypropylated starch (fluid loss agent), palmityl trimethyl ammonium chloride (expansion-resisting agent) are mixed with to uniform solid mixture in proportion, while stirring this solid mixture is added in base fluid to stirring and dissolving 2 hours.
Above-mentioned oil layer protection liquid is for pump detection and workover, and post-job output decubation shortens 4 days than in the past.
Embodiment 2
By following proportioning, prepare raw material:
40 tons, clear water, hydroxypropylguar gum 160kg, hydroxypropylated starch 800kg, palmityl trimethyl ammonium chloride 1200kg, polyoxyethylene nonylphenol ether 12kg, 1427 cats product 4kg.
Production method is as follows:
First in clear water, add polyoxyethylene nonylphenol ether (tensio-active agent) and 1427 cats products (sterilant), stir 10min and be mixed with base fluid, again hydroxypropylguar gum (tackifier), hydroxypropylated starch (fluid loss agent), palmityl trimethyl ammonium chloride (expansion-resisting agent) are mixed with to uniform solid mixture in proportion, while stirring this solid mixture is added in base fluid to stirring and dissolving 3 hours.
Above-mentioned oil layer protection liquid is for the inspection pump sand washing operation of D6-15K well, and post-job drainage period shortens 9 days than in the past, output decubation shortening 18 days, output recovery rate have improved 74 percentage points.
Embodiment 3
By following proportioning, prepare raw material:
30 tons, clear water, hydroxypropylguar gum 120kg, hydroxypropylated starch 300kg, palmityl trimethyl ammonium chloride 900kg, polyoxyethylene nonylphenol ether 15kg, 1427 cats product 3kg.
Production method is as follows:
First in clear water, add polyoxyethylene nonylphenol ether (tensio-active agent) and 1427 cats products (sterilant), stir 10min and be mixed with base fluid, again hydroxypropylguar gum (tackifier), hydroxypropylated starch (fluid loss agent), palmityl trimethyl ammonium chloride (expansion-resisting agent) are mixed with to uniform solid mixture in proportion, while stirring this solid mixture is added in base fluid to stirring and dissolving 3 hours.
Above-mentioned oil layer protection liquid for electricity, turn take out, sand washing operation, after operation, day production fluid improves 4m
3, day produce oil improves 4 tons.
Embodiment 4:
By following proportioning, prepare raw material:
50 tons, clear water, hydroxypropylguar gum 200kg, hydroxypropylated starch 750kg, palmityl trimethyl ammonium chloride 1000kg, polyoxyethylene nonylphenol ether 20kg, 1427 cats product 5kg.
Production method is as follows:
First in clear water, add polyoxyethylene nonylphenol ether (tensio-active agent) and 1427 cats products (sterilant), stir 10min and be mixed with base fluid, again hydroxypropylguar gum (tackifier), hydroxypropylated starch (fluid loss agent), palmityl trimethyl ammonium chloride (expansion-resisting agent) are mixed with to uniform solid mixture in proportion, while stirring this solid mixture is added in base fluid to stirring and dissolving 3 hours.
Above-mentioned oil layer protection liquid is for pump upgrading operation, and after operation, day production fluid is by 22m
3be increased to 44m
3, a day produce oil is increased to 15 tons by 9 tons.
Embodiment 5:
By following proportioning, prepare raw material:
40 tons, clear water, hydroxypropylguar gum 160kg, hydroxypropylated starch 800kg, palmityl trimethyl ammonium chloride 1200kg, polyoxyethylene nonylphenol ether 20kg, 1427 cats product 4kg.
Production method is as follows:
First in clear water, add polyoxyethylene nonylphenol ether (tensio-active agent) and 1427 cats products (sterilant), stir 10min and be mixed with base fluid, again hydroxypropylguar gum (tackifier), hydroxypropylated starch (fluid loss agent), palmityl trimethyl ammonium chloride (expansion-resisting agent) are mixed with to uniform solid mixture in proportion, while stirring this solid mixture is added in base fluid to stirring and dissolving 3 hours.
Above-mentioned oil layer protection liquid turns and takes out operation for blowing, and within post-job day, production fluid is by 20m
3be increased to 56m
3, a day produce oil is increased to 27 tons by 9 tons.
Embodiment 6:
By following proportioning, prepare raw material:
60 tons, clear water, hydroxypropylguar gum 180kg, hydroxypropylated starch 1200kg, palmityl trimethyl ammonium chloride 1200kg, polyoxyethylene nonylphenol ether 20kg, 1427 cats product 6kg.
Production method is as follows:
First in clear water, add polyoxyethylene nonylphenol ether (tensio-active agent) and 1427 cats products (sterilant), stir 10min and be mixed with base fluid, again hydroxypropylguar gum (tackifier), hydroxypropylated starch (fluid loss agent), palmityl trimethyl ammonium chloride (expansion-resisting agent) are mixed with to uniform solid mixture in proportion, while stirring this solid mixture is added in base fluid to stirring and dissolving 2 hours.
Kill-job when above-mentioned oil layer protection liquid is used for sand control treatment, production fluid operation more in the past in post-job day improves 5m
3, day produce oil improves 6 tons.
Claims (7)
1. an oil layer protection liquid, is characterized in that being comprised of the component of following ratio of quality and the number of copies: water 100, tackifier 0.3～0.4, fluid loss agent 1～2, expansion-resisting agent 2～3, tensio-active agent 0.03～0.05, sterilant 0.01.
2. oil layer protection liquid according to claim 1, is characterized in that described water is clear water.
3. oil layer protection liquid according to claim 1, is characterized in that described tackifier are hydroxypropylguar gum.
4. oil layer protection liquid according to claim 1, is characterized in that described fluid loss agent is hydroxypropylated starch.
5. oil layer protection liquid according to claim 1, is characterized in that described expansion-resisting agent is palmityl trimethyl ammonium chloride.
6. oil layer protection liquid according to claim 1, is characterized in that described tensio-active agent is polyoxyethylene nonylphenol ether.
7. oil layer protection liquid according to claim 1, is characterized in that described sterilant is 1427 cats products.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210302496.9A CN103627377B (en) | 2012-08-23 | 2012-08-23 | Oil layer protective solution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210302496.9A CN103627377B (en) | 2012-08-23 | 2012-08-23 | Oil layer protective solution |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103627377A true CN103627377A (en) | 2014-03-12 |
| CN103627377B CN103627377B (en) | 2016-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210302496.9A Active CN103627377B (en) | 2012-08-23 | 2012-08-23 | Oil layer protective solution |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104479661A (en) * | 2014-11-25 | 2015-04-01 | 中国海洋石油总公司 | Waterproof injury front reservoir protection operating fluid and preparation method |
| CN105238370A (en) * | 2015-11-02 | 2016-01-13 | 中国海洋石油总公司 | Isolating and temporary-plugging well-repair working fluid for offshore oilfield and preparation method for isolating and temporary-plugging well-repair working fluid |
| CN105733538A (en) * | 2016-03-18 | 2016-07-06 | 中国石油天然气集团公司 | Low-solid-content reservoir protection workover fluid and preparation method thereof |
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| CN1381538A (en) * | 2002-06-03 | 2002-11-27 | 大庆油田有限责任公司 | Composite protecting liquid for pressurizing well in injection region |
| CN1548498A (en) * | 2003-05-16 | 2004-11-24 | 韩文峰 | Oil layer protecting drilling fluid without clay |
| CN101230259A (en) * | 2008-02-21 | 2008-07-30 | 河南德凯化工科技有限公司 | High temperature resistant anti-salt solid-free environment protection drilling and completing fluids |
| CN101676360A (en) * | 2008-09-18 | 2010-03-24 | 中国石油天然气股份有限公司 | Ultra-low permeability oil layer protection drilling fluid for horizontal well |
| CN102533232A (en) * | 2010-12-13 | 2012-07-04 | 中国石油天然气股份有限公司 | Solid-phase-free multi-functional well completion working solution |
-
2012
- 2012-08-23 CN CN201210302496.9A patent/CN103627377B/en active Active
Patent Citations (5)
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| CN1381538A (en) * | 2002-06-03 | 2002-11-27 | 大庆油田有限责任公司 | Composite protecting liquid for pressurizing well in injection region |
| CN1548498A (en) * | 2003-05-16 | 2004-11-24 | 韩文峰 | Oil layer protecting drilling fluid without clay |
| CN101230259A (en) * | 2008-02-21 | 2008-07-30 | 河南德凯化工科技有限公司 | High temperature resistant anti-salt solid-free environment protection drilling and completing fluids |
| CN101676360A (en) * | 2008-09-18 | 2010-03-24 | 中国石油天然气股份有限公司 | Ultra-low permeability oil layer protection drilling fluid for horizontal well |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104479661A (en) * | 2014-11-25 | 2015-04-01 | 中国海洋石油总公司 | Waterproof injury front reservoir protection operating fluid and preparation method |
| CN105238370A (en) * | 2015-11-02 | 2016-01-13 | 中国海洋石油总公司 | Isolating and temporary-plugging well-repair working fluid for offshore oilfield and preparation method for isolating and temporary-plugging well-repair working fluid |
| CN105238370B (en) * | 2015-11-02 | 2018-10-23 | 中国海洋石油集团有限公司 | A kind of offshore oilfield temporary stifled well-repairing work fluid of isolation and preparation method thereof |
| CN105733538A (en) * | 2016-03-18 | 2016-07-06 | 中国石油天然气集团公司 | Low-solid-content reservoir protection workover fluid and preparation method thereof |
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| Publication number | Publication date |
|---|---|
| CN103627377B (en) | 2016-06-08 |
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