CN104893703A - Low-solidifying-point foaming agent for oilfield operation - Google Patents
Low-solidifying-point foaming agent for oilfield operation Download PDFInfo
- Publication number
- CN104893703A CN104893703A CN201510272477.XA CN201510272477A CN104893703A CN 104893703 A CN104893703 A CN 104893703A CN 201510272477 A CN201510272477 A CN 201510272477A CN 104893703 A CN104893703 A CN 104893703A
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- Prior art keywords
- whipping agent
- foaming agent
- agent
- low
- glycerol
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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
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
- C09K8/584—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids characterised by the use of specific surfactants
-
- 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
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- 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)
- Oil, Petroleum & Natural Gas (AREA)
- Lubricants (AREA)
Abstract
The invention relates to a low-solidifying-point foaming agent for oilfield operation. The foaming agent is compounded from polyoxyethylene fatty alcohol sodium sulfate (ASE), cocamidopropyl betaine (CAB), an anionic polymer, glycerol and water. The synergistic action of the AES and CAB increases the foam yield. The anionic polymer added into the compounded system enhances the strength of the foam liquid film, thereby further enhancing the foam stability. The added glycerol lowers the solidifying point of the system to -15 DEG C below, and does not influence the stability of the foaming agent. In the preferable scheme, the low-solidifying-point foaming agent for oilfield operation is composed of the following components in percentage by mass: 24.5% of ASE, 1.4% of CAB, 0.35% of anionic polymer, 30% of glycerol and 43.75% of water. The foaming agent has the advantages of favorable foaming property, high stability, simple preparation process and the like, is convenient to use, and can be well applied in field and especially in a low-temperature environment.
Description
Technical field
The present invention relates to oil field operation whipping agent, relate to a kind of operation whipping agent that still can keep good flow in low temperature environment particularly.
Background technology
In the long-time running of Oilfield Pipelines, there will be shake out, analyse wax, fouling etc. affect oil-gas field produce phenomenon, for ensure oil field normally produce and need carry out well-flushing to it.Enriched in foam technology has the advantage such as effective, usage quantity is little and is used widely.This technology needs to use whipping agent; Oil field whipping agent is dissolved in disturbance in water and produces a large amount of bubble, and inject position to be washed and clean, because the shear force of aerated fluid is comparatively large, viscosity is high, and there is good dispersiveness and emulsifying property, make to have the paraffin be attached on the inside and outside wall of oil pipe, internal surface of sleeve pipe and down-hole and passage and adhesive to peel off scavenging(action) preferably.In addition, whipping agent also can be used for Sand-washing in Oilfield, takes sand etc.
Oil field operation whipping agent kind is more in the market, use properties is better, but zero pour is all higher, as about-1 DEG C conventional, UT8-2 zero pour, quick solidification in low temperature environment, its mobility declines to a great extent, even lost flowability, makes whipping agent normally use, and then makes enriched in foam deleterious, whipping agent after simultaneously solidifying can cause transport inconvenience, easily leaks and causes environmental pollution.Each oil field to the north of China Qin Huai line, winter, external temperature all can be reduced to subzero, as Daqing oil field processing temperature can be low to moderate-15 DEG C.Under cold condition, the whipping agent of energy applications well is significant to guaranteeing that oil field normally produces.
Summary of the invention
The object of the present invention is to provide one under cryogenic, be specifically low to moderate-15 DEG C, the whipping agent industrialization product that can normally use.The development of this pore forming material is by the composite realization of tensio-active agent with other auxiliary, and wherein tensio-active agent is for generation of bubble, to realize the technical requirements of operation whipping agent; Neat solvent, for reducing the zero pour of blowing agent system, makes whipping agent realize keeping good performance under cryogenic, simultaneously this neat solvent can not Surfactant foaming, foam stability can have a negative impact.For achieving the above object, the technical solution used in the present invention is:
First prepare foaming system, this system by massfraction be respectively 35% AES, 2% CAB, 0.5% anionic polymer and 62.5% water; Again by massfraction get 70% foaming system and 30% glycerol compositely obtain this whipping agent.Be converted into total formula, each constituent mass mark: AES is 24.5%, CAB is 1.4%, anionic polymer is 0.35%, pure water is 43.75%, glycerol is 30%.This whipping agent has good mobility under cryogenic, and meets operation whipping agent general technical specifications (QSH1020_1970-2008).
Feature of the present invention is:
1) compared with other operation whipping agent on market, described whipping agent not only has good foam performance, meets operation whipping agent general technical specifications, can also keep good flowing, can be applied to Daqing oil field well when temperature is low to moderate-15 DEG C.
2) this blowing agent system seethes with excitement in 102 DEG C, does not have flash-point, stores very safe
3) this blowing agent system carries out evaluation institute survey technology index according to " QSH1020_1970-2008 " standard and all meets service index.
Accompanying drawing explanation
Fig. 1 is that pour point depressant dosage affects result to system zero pour, and data show that, when dosage is 30%, whole system zero pour can be down to-18 DEG C.
Fig. 2 is that dissimilar pour point depressant affects result to blowing agent system character, and now each pour point depressant dosage massfraction is 30%, and data show the requirement of comprehensive flash-point and foam performance, glycerol best performance.
Fig. 3 is the comparison diagram of this pore forming material system and UT8-2 dosage and lathering property, and data show that this bubbling system foam performance is better than UT8-2 under the condition of triumph salt solution.
Embodiment
The present invention includes a kind of oil field operation whipping agent, this whipping agent is by tensio-active agent, suds-stabilizing agent and pour point depressant and other auxiliary is composite makes.Whole system is made in two steps:
1) prepare foaming system, the anionic polymer that this system is respectively 0.5% by massfraction is dissolved in the water of 62.5%, then adds 2%CAB, system is warming up to the AES that 60 DEG C add 35%, treats to dissolve completely to be cooled to room temperature and to obtain foaming system;
2) get massfraction be 70% foaming system and 30% glycerol room temperature under carry out composite, obtain this oil field operation foaming system after Homogeneous phase mixing.
Embodiment
The foam performance of whipping agent is evaluated, its judgement criteria is carried out according to Shengli Oil Field Petroleum Authority of SINOPEC company standard " QSH1020_1970-2008 ", accurately take 1.50g whipping agent sample, take 498.50g triumph salt solution in 1000mL beaker, stir with uniform speed slow, gained strength of solution is 0.3%, carry out laboratory experiment with gained solution according to Shengli Oil Field Petroleum Authority of SINOPEC company standard, result shows its indices and all reaches quality standard needed for industry.Its foam volume reaches 340ml, and the transformation period is for reaching 120min.
Application examples
This whipping agent is used for operation well-flushing, there is good effect.Using method realizes by following steps:
1) substitute former whipping agent UT8-2 with this whipping agent, during use, doubly prepare foam liquid measure by the 1.5-2.0 of well actual useful volume;
2) transfer in oil pipe by flushing fluid by atomizer pump, transferring the degree of depth is the above 10m of well middle sleeve footwear; If flowing capacity of oilwell is strong, it is few to shake out, the above 50-100m of payzone can be placed in by transferring mouth;
3) adopt backwash process to new well or the high well of output, foam enters from sleeve pipe, and oil pipe goes out; Namely old well is yielded poorly, impaired serious well adopt just wash technique, foam enters from oil pipe, and sleeve pipe goes out;
4) determine technology for washing well and carry out well-flushing operation after completing preparation work; To be washed till when crude oil returns out termination of pumping to observe, if peak pressure when oil pressure does not reach pressure testing, again for well, repeatedly several times to oil pressure close to peak pressure during pressure testing, now foam arrives bottom oil well; After to return ejecta in comb be crude oil, stop well-flushing operation.
Claims (6)
1. a low-freezing oil field operation whipping agent, is made up of tensio-active agent and other auxiliary; It is characterized in that: tensio-active agent produces a large amount of operation foam, other auxiliary increases froth stability, reduces system zero pour.
2. according to the whipping agent of claim 1, it is characterized in that: tensio-active agent forms by AES and CAB is composite; In operational version, AES massfraction is 20-30%, and the best is 24.5%; CAB massfraction is 0.5-2%, and the best is 1.4%.
3. according to the whipping agent of claim 1, it is characterized in that: other described auxiliary is suds-stabilizing agent, pour point depressant and water.
4. according to the whipping agent of claim 3, it is characterized in that: described suds-stabilizing agent can be anionic polymer, cationic polymers; Wherein best with anionic polymer HPAM result of use, its functional quality mark can be 0.1-0.5%, and the best is 0.35%.
5. according to the whipping agent of claim 3, it is characterized in that: described pour point depressant can be glycerol, Virahol, 1,2 propylene glycol, salt etc.; Wherein with glycerol best results, its functional quality mark can be 20-40%, and the best is 30%.
6. according to the whipping agent of claims 3, it is characterized in that: described water is ortho-water, functional quality mark can be 40-50%, and the best is 43.75%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510272477.XA CN104893703A (en) | 2015-05-26 | 2015-05-26 | Low-solidifying-point foaming agent for oilfield operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510272477.XA CN104893703A (en) | 2015-05-26 | 2015-05-26 | Low-solidifying-point foaming agent for oilfield operation |
Publications (1)
| Publication Number | Publication Date |
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| CN104893703A true CN104893703A (en) | 2015-09-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510272477.XA Pending CN104893703A (en) | 2015-05-26 | 2015-05-26 | Low-solidifying-point foaming agent for oilfield operation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106833599A (en) * | 2016-12-28 | 2017-06-13 | 北京晨础石油科技有限公司 | Exempt from liquid proppant and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1277238A (en) * | 2000-06-06 | 2000-12-20 | 中国石油辽河油田公司采油工艺研究院 | Antifreezing foaming agent and its use |
| CN102312666A (en) * | 2010-07-06 | 2012-01-11 | 中国石油天然气股份有限公司 | Method for improving water displacement recovery ratio of low-permeability reservoir |
| CN102504788A (en) * | 2011-10-25 | 2012-06-20 | 中国石油天然气股份有限公司 | Foaming agent suitable for oilfield development |
| CN104357037A (en) * | 2014-11-10 | 2015-02-18 | 中国石油天然气股份有限公司 | Anti-freezing foaming agent and preparation method thereof |
-
2015
- 2015-05-26 CN CN201510272477.XA patent/CN104893703A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1277238A (en) * | 2000-06-06 | 2000-12-20 | 中国石油辽河油田公司采油工艺研究院 | Antifreezing foaming agent and its use |
| CN102312666A (en) * | 2010-07-06 | 2012-01-11 | 中国石油天然气股份有限公司 | Method for improving water displacement recovery ratio of low-permeability reservoir |
| CN102504788A (en) * | 2011-10-25 | 2012-06-20 | 中国石油天然气股份有限公司 | Foaming agent suitable for oilfield development |
| CN104357037A (en) * | 2014-11-10 | 2015-02-18 | 中国石油天然气股份有限公司 | Anti-freezing foaming agent and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106833599A (en) * | 2016-12-28 | 2017-06-13 | 北京晨础石油科技有限公司 | Exempt from liquid proppant and preparation method thereof |
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Application publication date: 20150909 |