CN105542732A - Autogenetic foam micelle acid liquid for water injection well - Google Patents
Autogenetic foam micelle acid liquid for water injection well Download PDFInfo
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- CN105542732A CN105542732A CN201511005986.2A CN201511005986A CN105542732A CN 105542732 A CN105542732 A CN 105542732A CN 201511005986 A CN201511005986 A CN 201511005986A CN 105542732 A CN105542732 A CN 105542732A
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- water injection
- acid
- injection well
- foam
- micella
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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
Abstract
The invention provides autogenetic foam micelle acid liquid for water injection well. The autogenetic foam micelle acid liquid comprises the following components in percentage by mass: 15.0%-20.0% of hydrochloric acid, 3.0%-5.0% of hydrofluoric acid, 0.5%-2.0% of a foaming agent, 0.5%-1.0% of a foam stabilizer, 10.0%-15.0% of a micelle agent. 0.5%-1.0% of a corrosion inhibitor, 2.0%-10.0% of a clay stabilizer, 2.0%-10.0% of an iron ion stabilizer, 2.0%-10.0% of a clean-up additive and the balance of distilled water. According to the autogenetic foam micelle acid liquid, foams are autogenetically formed at the bottom of a well, so that the blockage can be eliminated at a deep part, the secondary damage can be reduced, the flow-back efficiency is relatively high, the acidization process is relatively thorough, and the period of validity is prolonged.
Description
Technical field
The invention belongs to and belong to oilfield injection water development technique field, be specifically related to a kind of preparation method being applied to the water injection well self-generating foam micella acid solution of low permeability oil field high pressure under-injected well acidifying measure.
Background technology
Order water filling is the effective means of supplementary producing energy, guarantee oil field long term stable production, but Changqing oilfields part compact oil reservoir porosity is little, and rate of permeation is low, oil reservoir continuity is poor, and in waterflooding process, because foreign liquid and reservoir rock mineral and reservoir fluid etc. are incompatible, cause reservoir choke, water injection well water-retaining capacity is declined, water injection pressure raises, and reservoir permeability declines, and note not, to note not inlet well many, corresponding oil well output declines, and brings very large impact to oilfield stable production.
Corresponding unblocking and injection increasing technology must be adopted to continue water filling to the water injection well blocked.The technology of current water injection well unblocking and injection increasing comprises soil acid acidizing technology, Compound-acid Acidizing Technology, work-in-progress control technology, polynary slow organic acid Acidizing Technology, oxidisability deep penetration Acidizing Technology, MH acid Acidizing Technology etc., the efficient height of these measures (general >90%), but validity period shorter (3 to 5 months).For the layer of physical property relative mistake, carried out water injection well Fracturing Technology, measure is efficient low, and effect is undesirable.There is no an effective increasing injection technology at present, not only can reduce water injection pressure but also water injection pressure can be kept steady in a long-term.
Summary of the invention
For the problems referred to above, the invention provides a kind of overcome current conventional acidulation return row not thoroughly, the water injection well self-generating foam micella acid solution of the stratum secondary injury problem that causes measure validity period short.
For achieving the above object, by the following technical solutions, a 1. water injection well self-generating foam micella acid solution, is made up of following mass percent component in the present invention:
Hydrochloric acid: 15.0% ~ 20.0%;
Hydrofluoric acid: 3.0% ~ 5.0%;
Pore forming material: 0.5% ~ 2.0%;
Suds-stabilizing agent: 0.5% ~ 1.0%;
Micellar: 10.0% ~ 15.0%;
Inhibiter: 0.5% ~ 1.0%;
Clay stabilizer: 2.0% ~ 10.0%;
Fe stabilizer: 2.0% ~ 10.0%;
Cleanup additive: 2.0% ~ 10.0%;
All the other are distilled water.
Described pore forming material is benzalkonium chloride, fusel, sec-octyl alcohol, sodium lauryl sulphate are mixed with by 1:1:1:2 the aqueous solution that concentration is 20.0%.
Described suds-stabilizing agent is anionic polyacrylamide, polyvinyl alcohol, polyoxyethylenated alcohol sodium sulfate be mixed with by 2:1:1 25.0% the aqueous solution.
Described micellar is sodium taurodeoxycholate, and molecular weight is 522.
The concentration of described hydrochloric acid is 31%; The concentration of hydrofluoric acid is 40%.
The present invention adopts technique scheme, have the following advantages: water injection well self-generating foam micella acid solution prepared by the present invention and slug combination, this acid solution combines the feature of foamed acid and micellar, at shaft bottom self-generating foam, reach the object of removing clog in deep reservoir, and the generation of secondary injury can be reduced under the effect of micellar, and the row's of returning efficiency is higher, acidization can be made more thorough, extend the expiration date.
Embodiment
Further a kind of water injection well self-generating foam micella acid solution is described in detail according to embodiment below.
Embodiment 1
One one kinds of water injection well self-generating foam micella acid solutions, is characterized in that, be made up of following mass percent component:
Hydrochloric acid: 15.0% ~ 20.0%;
Hydrofluoric acid: 3.0% ~ 5.0%;
Pore forming material: 0.5% ~ 2.0%;
Suds-stabilizing agent: 0.5% ~ 1.0%;
Micellar: 10.0% ~ 15.0%;
Inhibiter: 0.5% ~ 1.0%;
Clay stabilizer: 2.0% ~ 10.0%;
Fe stabilizer: 2.0% ~ 10.0%;
Cleanup additive: 2.0% ~ 10.0%;
All the other are distilled water.
At work, the foam micella acid solution that the present embodiment provides, in construction process, construction shows,, average water injection pressure decline 4.5MPa, individual well water-retaining capacity rising 25m3/d, measure efficient 100.0%, measure validity period more than 200 days, illustrates that self-generating foam micella acidifying acid fluid system can effectively improve water injection well situation, increases zone permeability, improve resident fluid circulation situation, there is good actual application value.
Embodiment 2
A kind of water injection well self-generating foam micella acid solution, prepare according to following steps:
1) in acid-resistant container, add the concentrated hydrochloric acid that mass percent is 15.0%, the concentration of this concentrated hydrochloric acid is 31%, not thin up;
2) add in step 1) in the container of concentrated hydrochloric acid and carry out adding inhibiter, the emulsion splitter of 1.0%, clay stabilizer, the Fe stabilizer of 10.0%, the cleanup additive composition of 10.0% of 10.0% that mass percent is 1.0% according to following order;
3) to step 2) in container in add the hydrofluoric acid that mass percent is 3%, the concentration of this hydrofluoric acid is 40%;
4) in the container in step 3), add distilled water, the acid solution be stirred well in container fully mixes with reagent;
5) in the container in step 4), the pore forming material that mass percent is 2.0% is added, this pore forming material be from benzalkonium chloride, fusel, sec-octyl alcohol, sodium lauryl sulphate by 1:1:1:2 proportions become concentration be 20.0% the aqueous solution, and join in container according to the order from benzalkonium chloride, fusel, sec-octyl alcohol, sodium lauryl sulphate, and stir;
6) in the container in step 5), the suds-stabilizing agent that mass percent is 1.0% is added, this suds-stabilizing agent is made up of the anionic polyacrylamide of 2:1:1, polyvinyl alcohol, polyoxyethylenated alcohol sodium sulfate, and join in container according to the order of anionic polyacrylamide, polyvinyl alcohol, polyoxyethylenated alcohol sodium sulfate, and stir;
7) in the container in step 6), add the micellar that mass percent is 15.0%, this micellar is sodium taurodeoxycholate, and molecular weight is 522, and stirs, and namely obtains foam micella acid solution.
In practice of construction process, after formation hydrochloric acid, hydrogen fluoride, additive mixing, soltion viscosity is 20.0mPa.s to 30.0mPa.s, after adding micellar, soltion viscosity increases to 60.0mPa.s to 500.0mPa.s, meets and reduces hydrochlorate speed of response and reduce the requirements such as leak-off.
The construction Segment combination models of this acid fluid system is:
(1) first slug: 15%HCL+5% micellar+1% inhibiter+water 5m
3;
(2) second slugs: foamed acid 8m
3+ 15% sodium hydrogen carbonate solution 6m
3+ foamed acid 10m
3+ 15% sodium hydrogen carbonate solution 4m
3+ foamed acid 10m
3;
(3) the 3rd slugs: clear water 10 side.
Table one is originally by the self-generating foam micella acidifying site operation effect data table of embodiment 2:
Embodiment 3:
A kind of water injection well self-generating foam micella acid solution, prepare according to following steps:
1) in acid-resistant container, add the concentrated hydrochloric acid that mass percent is 20.0%, the concentration of this concentrated hydrochloric acid is 31%, not thin up;
2) add in step 1) in the container of concentrated hydrochloric acid and carry out adding inhibiter, the emulsion splitter of 0.5%, clay stabilizer, the Fe stabilizer of 2.0%, the cleanup additive composition of 2.0% of 2.0% that mass percent is 0.5% according to following order;
3) to step 2) in container in add the hydrofluoric acid that mass percent is 5%, the concentration of this hydrofluoric acid is 40%;
4) in the container in step 3), add distilled water, the acid solution be stirred well in container fully mixes with reagent;
5) in the container in step 4), the pore forming material that mass percent is 0.5% is added, this pore forming material be from benzalkonium chloride, fusel, sec-octyl alcohol, sodium lauryl sulphate by 1:1:1:2 proportions become concentration be 20.0% the aqueous solution, and join in container according to the order from benzalkonium chloride, fusel, sec-octyl alcohol, sodium lauryl sulphate, and stir;
6) in the container in step 5), the suds-stabilizing agent that mass percent is 0.5% is added, this suds-stabilizing agent is made up of the anionic polyacrylamide of 2:1:1, polyvinyl alcohol, polyoxyethylenated alcohol sodium sulfate, and join in container according to the order of anionic polyacrylamide, polyvinyl alcohol, polyoxyethylenated alcohol sodium sulfate, and stir;
7) in the container in step 6), add the micellar that mass percent is 10.0%, this micellar is sodium taurodeoxycholate, and molecular weight is 522, and stirs, and namely obtains foam micella acid solution.
In practice of construction process, after formation hydrochloric acid, hydrogen fluoride, additive mixing, soltion viscosity is 20.0mPa.s to 30.0mPa.s, after adding micellar, soltion viscosity increases to 60.0mPa.s to 500.0mPa.s, meets and reduces hydrochlorate speed of response and reduce the requirements such as leak-off.
The construction Segment combination models of this acid fluid system is:
(1) first slug: 10%HCL+8% micellar+1.5% inhibiter+water 8m
3;
(2) second slugs: foamed acid 10m
3+ 15% sodium hydrogen carbonate solution 6m
3+ foamed acid 10m
3+ 15% sodium hydrogen carbonate solution 4m
3+ foamed acid 10m
3;
(3) the 3rd slugs: clear water 15 side.
Table two is originally by the self-generating foam micella acidifying site operation effect data table of embodiment 3:
Embodiment 4
A kind of water injection well self-generating foam micella acid solution, prepare according to following steps:
1) in acid-resistant container, add the concentrated hydrochloric acid that mass percent is 18.0%, the concentration of this concentrated hydrochloric acid is 31%, not thin up;
2) add in step 1) in the container of concentrated hydrochloric acid and carry out adding inhibiter, the emulsion splitter of 0.8%, clay stabilizer, the Fe stabilizer of 6.0%, the cleanup additive composition of 6.0% of 6.0% that mass percent is 0.8% according to following order;
3) to step 2) in container in add the hydrofluoric acid that mass percent is 4%, the concentration of this hydrofluoric acid is 40%
4) in the container in step 3), add distilled water, the acid solution be stirred well in container fully mixes with reagent;
5) in the container in step 4), the pore forming material that mass percent is 0.8% is added, this pore forming material be from benzalkonium chloride, fusel, sec-octyl alcohol, sodium lauryl sulphate by 1:1:1:2 proportions become concentration be 20.0% the aqueous solution, and join in container according to the order from benzalkonium chloride, fusel, sec-octyl alcohol, sodium lauryl sulphate, and stir;
6) in the container in step 5), the suds-stabilizing agent that mass percent is 0.8% is added, this suds-stabilizing agent is made up of the anionic polyacrylamide of 2:1:1, polyvinyl alcohol, polyoxyethylenated alcohol sodium sulfate, and join in container according to the order of anionic polyacrylamide, polyvinyl alcohol, polyoxyethylenated alcohol sodium sulfate, and stir;
7) in the container in step 6), add the micellar that mass percent is 13.0%, this micellar is sodium taurodeoxycholate, and molecular weight is 522, and stirs, and namely obtains foam micella acid solution.
In practice of construction process, after formation hydrochloric acid, hydrogen fluoride, additive mixing, soltion viscosity is 20.0mPa.s to 30.0mPa.s, after adding micellar, soltion viscosity increases to 60.0mPa.s to 500.0mPa.s, meets and reduces hydrochlorate speed of response and reduce the requirements such as leak-off.
The construction Segment combination models of this acid fluid system is:
(1) first slug: 13%HCL+6% micellar+1.3% inhibiter+water 6m
3;
(2) second slugs: foamed acid 9m
3+ 15% sodium hydrogen carbonate solution 5m
3+ foamed acid 9m
3+ 15% sodium hydrogen carbonate solution 5m
3+ foamed acid 9m
3;
(3) the 3rd slugs: clear water 13 side.
Table two is originally by the self-generating foam micella acidifying site operation effect data table of embodiment 4:
Can be found out by embodiment 2-4, the foam micella acid solution of preparation, in construction process, construction shows, average water injection pressure decline 4.5MPa, individual well water-retaining capacity rising 25m3/d, measure efficient 100.0%, measure validity period more than 200 days, illustrate that self-generating foam micella acidifying acid fluid system can effectively improve water injection well situation, increase zone permeability, improve resident fluid circulation situation, foam micella acid solution performance in the process of construction that the foam micella acid solution of preparation in embodiment 4 is prepared relative to embodiment 2 and embodiment 3 is more stable, relative to embodiment 2 and embodiment 3 effect more.
In above-described embodiment, inhibiter is selected from the ALS-2 acidification corrosion inhibitor of Lu Xing chemical developer company limited of Anqiu City; Emulsion splitter is selected from the Thg-9603 type emulsion splitter of Fengshun, Tianjin ten thousand science and trade Development Co., Ltd; Clay stabilizer is selected from the clay stabilizer of the BSA-101 of Beijing Shi great Order Science and Technology Ltd.; Fe stabilizer is selected from the BSA-604 Fe stabilizer of Beijing Shi great Order Science and Technology Ltd., the OF-103 cleanup additive of the cleanup additive Shanghai effective company of Chu Xing chemical industry.
More than exemplifying is only illustrate of the present invention, does not form the restriction to protection scope of the present invention, everyly all belongs within protection scope of the present invention with the same or analogous design of the present invention.
Claims (5)
1. a water injection well self-generating foam micella acid solution, is characterized in that, is made up of following mass percent component:
Hydrochloric acid: 15.0% ~ 20.0%;
Hydrofluoric acid: 3.0% ~ 5.0%;
Pore forming material: 0.5% ~ 2.0%;
Suds-stabilizing agent: 0.5% ~ 1.0%;
Micellar: 10.0% ~ 15.0%;
Inhibiter: 0.5% ~ 1.0%;
Clay stabilizer: 2.0% ~ 10.0%;
Fe stabilizer: 2.0% ~ 10.0%;
Cleanup additive: 2.0% ~ 10.0%;
All the other are distilled water.
2. a kind of water injection well self-generating foam micella acid solution according to claim 1, is characterized in that, described pore forming material is benzalkonium chloride, fusel, sec-octyl alcohol, sodium lauryl sulphate be mixed with by 1:1:1:2 the aqueous solution that concentration is 20.0%.
3. a kind of water injection well self-generating foam micella acid solution according to claim 1, it is characterized in that, described suds-stabilizing agent is anionic polyacrylamide, polyvinyl alcohol, polyoxyethylenated alcohol sodium sulfate be mixed with by 2:1:1 25.0% the aqueous solution.
4. a kind of water injection well self-generating foam micella acid solution according to claim 1, it is characterized in that, described micellar is sodium taurodeoxycholate, and molecular weight is 522.
5. a kind of water injection well self-generating foam micella acid solution according to claim 1, it is characterized in that, the concentration of described hydrochloric acid is 31%; The concentration of hydrofluoric acid is 40%.
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|---|---|---|---|
| CN201511005986.2A CN105542732B (en) | 2015-12-29 | 2015-12-29 | A kind of water injection well self-generating foam micella acid solution |
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| CN105542732B CN105542732B (en) | 2018-06-01 |
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Cited By (3)
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| CN107474811A (en) * | 2017-09-25 | 2017-12-15 | 中国石油大学(北京) | A kind of microfoam acid solution and preparation method thereof |
| CN111394078A (en) * | 2020-04-29 | 2020-07-10 | 西安长泽石化科技有限公司 | Foam uniform acid and preparation method and use method thereof |
| CN111778009A (en) * | 2020-07-10 | 2020-10-16 | 陕西华天能源科技有限公司 | Composite steering micelle acid acidification de-plugging liquid and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107474811A (en) * | 2017-09-25 | 2017-12-15 | 中国石油大学(北京) | A kind of microfoam acid solution and preparation method thereof |
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| CN111394078A (en) * | 2020-04-29 | 2020-07-10 | 西安长泽石化科技有限公司 | Foam uniform acid and preparation method and use method thereof |
| CN111778009A (en) * | 2020-07-10 | 2020-10-16 | 陕西华天能源科技有限公司 | Composite steering micelle acid acidification de-plugging liquid and preparation method thereof |
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