CN104230016A - Oilfield reinjection water scale inhibitor and preparation method thereof - Google Patents
Oilfield reinjection water scale inhibitor and preparation method thereof Download PDFInfo
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- CN104230016A CN104230016A CN201410451303.5A CN201410451303A CN104230016A CN 104230016 A CN104230016 A CN 104230016A CN 201410451303 A CN201410451303 A CN 201410451303A CN 104230016 A CN104230016 A CN 104230016A
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Abstract
The invention relates to an oilfield reinjection water scale inhibitor and a preparation method thereof and belongs to the technical field of petroleum additives. The oilfield reinjection water scale inhibitor is prepared from the following components in parts by weight: 0.5-1 part of fresh sterculia nobilis seeds, 1-3 parts of fresh gleditsia sinensis seeds, 10-15 parts of diethylenetriaminepenta acid, 12-16 parts of polyaspartic acid, 4-7 parts of lauryl polyoxyethylene ether tartrate, 2-5 parts of chitosan, 3-4 parts of sodium humate, 6-11 parts of sodium polyanetholesulfonate, 0.5-1 part of a non-ionic fluorocarbon surfactant, 2-5 parts of polyethylene glycol and 30-50 parts of water. The oilfield reinjection water scale inhibitor provided by the invention has a good scale inhibiting performance and corrosion inhibition. Experiments show that the inhibition rate is greater than or equal to 96% and the scale inhibiting ratio is greater than or equal to 98%. Meanwhile, the oilfield reinjection water scale inhibitor provided by the invention is simple in preparation method; the prepared oilfield reinjection water scale inhibitor has a good dispersing effect on ferric oxide, further has an effect of stabilizing zinc salt and is easy to popularize and apply.
Description
Technical field
The invention belongs to petroleum additive technical field, be specifically related to a kind of oil field reinjection water Scale inhibitors and preparation method thereof.
Background technology
Oil field secondary oil recovery technique, adopt produced-water reinjection process, reinjected water contains a large amount of calcium, magnesium and strontium, barium plasma, the corresponding problem such as calcium magnesium scale, corrosion bringing pipeline.The fouling of waterflood-transmission line can cause the faults such as plugging, pump card, water injection pressure rising, thus causes the serious harms such as water-injection efficiency declines, oil well output greatly reduces.
Along with the development of water technology, people have higher requirement to Scale inhibitors.Be mainly reflected in two aspects: one is except the ability except having resistance calcium carbonate, calcium phosphate etc., also requires that dirt dispersion agent has good dispersing iron oxide ability, with the impact of the deposition heat exchanging effect and metallic corrosion that alleviate iron dirt; Two is due to zinc salt a large amount of uses as inhibiter principal constituent in water treatment agent, causes zinc dirt very easily to deposit, and requires that dirt dispersion agent has ability that is stable, dispersion zinc salt simultaneously for this reason.Therefore the multifunctional anti-incrustation dispersion agent petroleum additive technical field that exploitation has resistance calcium carbonate, calcium phosphate scale has dispersing iron oxide and stable zinc salt ability concurrently needs the problem of solution badly.
Summary of the invention
The present invention is in order to solve the deficiencies in the prior art, and provide a kind of oil field reinjection water Scale inhibitors and preparation method thereof, this Scale inhibitors has good scale-inhibiting properties, has the effect of good inhibition, dispersing iron oxide and stable zinc salt simultaneously.
The technical solution used in the present invention is as follows:
A kind of oil field reinjection water Scale inhibitors, comprises the following component according to weight parts: fresh sterculia nobilis's seed 0.5-1 part, fresh Gleditsia sinensis Seeds 1-3 part, diethylene triamine pentamethylene phosphonic 10-15 part, poly-aspartic-acid 12-16 part, ethoxylated dodecyl alcohol tartrate 4-7 part, chitosan 2-5 part, Sodium salts humic acids 3-4 part, poly-fennel sodium sulfonate 6-11 part, non-ion fluorin carbon surface active agent 0.5-1 part, polyoxyethylene glycol 2-5 part, water 30-50 part.
Further, preferably described oil field reinjection water Scale inhibitors, comprises the following component according to weight parts: 0.7 part, fresh sterculia nobilis's seed, fresh Gleditsia sinensis Seeds 2 parts, diethylene triamine pentamethylene phosphonic 12 parts, poly-aspartic-acid 13 parts, ethoxylated dodecyl alcohol tartrate 6 parts, chitosan 4 parts, Sodium salts humic acids 3.6 parts, poly-fennel sodium sulfonate 9 parts, non-ion fluorin carbon surface active agent 0.8 part, polyoxyethylene glycol 4 parts, 35 parts, water.
Further, preferably described oil field reinjection water Scale inhibitors, comprises the following component according to weight parts: 0.9 part, fresh sterculia nobilis's seed, fresh Gleditsia sinensis Seeds 2.4 parts, diethylene triamine pentamethylene phosphonic 14 parts, poly-aspartic-acid 15 parts, ethoxylated dodecyl alcohol tartrate 5 parts, chitosan 3 parts, Sodium salts humic acids 3.8 parts, poly-fennel sodium sulfonate 7 parts, non-ion fluorin carbon surface active agent 0.6 part, polyoxyethylene glycol 3 parts, 46 parts, water.
The present invention also provides a kind of preparation method of oil field reinjection water Scale inhibitors, comprises the steps:
Step (1), is 30-35% by fresh sterculia nobilis's seed and Gleditsia sinensis Seeds natural air drying to water ratio, is then crushed to 100-200 order with micronizer mill, then by it as in water, at 40-50 DEG C, after ultrasonic 30-50min, leave standstill, centrifugal, get supernatant liquid;
Step (2), adds ethoxylated dodecyl alcohol tartrate, chitosan, Sodium salts humic acids, non-ion fluorin carbon surface active agent successively in the mixed solution of the supernatant liquid that polyoxyethylene glycol and step (1) obtain, is stirred to after mixing, obtains premix material;
Step (3), adds diethylene triamine pentamethylene phosphonic, poly-aspartic-acid and poly-fennel sodium sulfonate successively in the premix material that step (2) obtains, is warming up to 50-60 DEG C, after stirring 1-2h, leaves standstill naturally cooling, to obtain final product.
Speed centrifugal in step (1) in technique scheme is 2800-3000r/min.
The speed stirred in step (3) in technique scheme is 100-200r/min.
compared with prior art, its beneficial effect is in the present invention:(1), the present invention has good scale-inhibiting properties and inhibition, through measuring: corrosion inhibition rate>=96%, scale inhibition performance>=98%; (2) preparation method of the present invention is simple, and obtained oil field reinjection water Scale inhibitors has good dissemination to ferric oxide, can also stablize the effect of zinc salt simultaneously; (3) raw material sources of the present invention are extensive, cheap and easy to get, are easy to apply.
Embodiment
Below in conjunction with embodiment, set forth the present invention further.
Embodiment 1
A kind of oil field reinjection water Scale inhibitors, comprises the following component according to weight parts: 0.5 part, fresh sterculia nobilis's seed, fresh Gleditsia sinensis Seeds 1 part, diethylene triamine pentamethylene phosphonic 10 parts, poly-aspartic-acid 12 parts, ethoxylated dodecyl alcohol tartrate 4 parts, chitosan 2 parts, Sodium salts humic acids 3 parts, poly-fennel sodium sulfonate 6 parts, non-ion fluorin carbon surface active agent 0.5 part, polyoxyethylene glycol 2 parts, 30 parts, water.
The preparation method of the present embodiment oil field reinjection water Scale inhibitors, comprises the steps:
Step (1), is 30-35% by fresh sterculia nobilis's seed and Gleditsia sinensis Seeds natural air drying to water ratio, is then crushed to 100-200 order with micronizer mill, then by it as in water, at 40 DEG C, after ultrasonic 30min, leave standstill, with the centrifugation of 2800r/min, get supernatant liquid;
Step (2), adds ethoxylated dodecyl alcohol tartrate, chitosan, Sodium salts humic acids, non-ion fluorin carbon surface active agent successively in the mixed solution of the supernatant liquid that polyoxyethylene glycol and step (1) obtain, is stirred to after mixing, obtains premix material;
Step (3), adds diethylene triamine pentamethylene phosphonic, poly-aspartic-acid and poly-fennel sodium sulfonate successively in the premix material that step (2) obtains, is warming up to 50 DEG C, after stirring 1h, leaves standstill naturally cooling, to obtain final product with the speed of 100r/min.
Embodiment 2
A kind of oil field reinjection water Scale inhibitors, comprises the following component according to weight parts: 1 part, fresh sterculia nobilis's seed, fresh Gleditsia sinensis Seeds 3 parts, diethylene triamine pentamethylene phosphonic 15 parts, poly-aspartic-acid 16 parts, ethoxylated dodecyl alcohol tartrate 7 parts, chitosan 5 parts, Sodium salts humic acids 4 parts, poly-fennel sodium sulfonate 11 parts, non-ion fluorin carbon surface active agent 1 part, polyoxyethylene glycol 5 parts, 50 parts, water.
The preparation method of the present embodiment oil field reinjection water Scale inhibitors, comprises the steps:
Step (1), is 30-35% by fresh sterculia nobilis's seed and Gleditsia sinensis Seeds natural air drying to water ratio, is then crushed to 100-200 order with micronizer mill, then by it as in water, at 50 DEG C, after ultrasonic 50min, leave standstill, with the centrifugation of 3000r/min, get supernatant liquid;
Step (2), adds ethoxylated dodecyl alcohol tartrate, chitosan, Sodium salts humic acids, non-ion fluorin carbon surface active agent successively in the mixed solution of the supernatant liquid that polyoxyethylene glycol and step (1) obtain, is stirred to after mixing, obtains premix material;
Step (3), adds diethylene triamine pentamethylene phosphonic, poly-aspartic-acid and poly-fennel sodium sulfonate successively in the premix material that step (2) obtains, is warming up to 60 DEG C, after stirring 2h, leaves standstill naturally cooling, to obtain final product with the speed of 200r/min.
Embodiment 3
A kind of oil field reinjection water Scale inhibitors, comprises the following component according to weight parts: 0.7 part, fresh sterculia nobilis's seed, fresh Gleditsia sinensis Seeds 2 parts, diethylene triamine pentamethylene phosphonic 12 parts, poly-aspartic-acid 13 parts, ethoxylated dodecyl alcohol tartrate 6 parts, chitosan 4 parts, Sodium salts humic acids 3.6 parts, poly-fennel sodium sulfonate 9 parts, non-ion fluorin carbon surface active agent 0.8 part, polyoxyethylene glycol 4 parts, 35 parts, water.
The preparation method of the present embodiment oil field reinjection water Scale inhibitors, comprises the steps:
Step (1), is 30-35% by fresh sterculia nobilis's seed and Gleditsia sinensis Seeds natural air drying to water ratio, is then crushed to 100-200 order with micronizer mill, then by it as in water, at 45 DEG C, after ultrasonic 36min, leave standstill, with the centrifugation of 2900r/min, get supernatant liquid;
Step (2), adds ethoxylated dodecyl alcohol tartrate, chitosan, Sodium salts humic acids, non-ion fluorin carbon surface active agent successively in the mixed solution of the supernatant liquid that polyoxyethylene glycol and step (1) obtain, is stirred to after mixing, obtains premix material;
Step (3), adds diethylene triamine pentamethylene phosphonic, poly-aspartic-acid and poly-fennel sodium sulfonate successively in the premix material that step (2) obtains, is warming up to 55 DEG C, after stirring 1.2h, leaves standstill naturally cooling, to obtain final product with the speed of 120r/min.
Embodiment 4
A kind of oil field reinjection water Scale inhibitors, comprises the following component according to weight parts: 0.9 part, fresh sterculia nobilis's seed, fresh Gleditsia sinensis Seeds 2.4 parts, diethylene triamine pentamethylene phosphonic 14 parts, poly-aspartic-acid 15 parts, ethoxylated dodecyl alcohol tartrate 5 parts, chitosan 3 parts, Sodium salts humic acids 3.8 parts, poly-fennel sodium sulfonate 7 parts, non-ion fluorin carbon surface active agent 0.6 part, polyoxyethylene glycol 3 parts, 46 parts, water.
The preparation method of the present embodiment oil field reinjection water Scale inhibitors, comprises the steps:
Step (1), is 30-35% by fresh sterculia nobilis's seed and Gleditsia sinensis Seeds natural air drying to water ratio, is then crushed to 100-200 order with micronizer mill, then by it as in water, at 48 DEG C, after ultrasonic 45min, leave standstill, with the centrifugation of 2940r/min, get supernatant liquid;
Step (2), adds ethoxylated dodecyl alcohol tartrate, chitosan, Sodium salts humic acids, non-ion fluorin carbon surface active agent successively in the mixed solution of the supernatant liquid that polyoxyethylene glycol and step (1) obtain, is stirred to after mixing, obtains premix material;
Step (3), adds diethylene triamine pentamethylene phosphonic, poly-aspartic-acid and poly-fennel sodium sulfonate successively in the premix material that step (2) obtains, is warming up to 57 DEG C, after stirring 1.6h, leaves standstill naturally cooling, to obtain final product with the speed of 180r/min.
comparative example 1
The difference of the present embodiment and embodiment 4 is not add fresh sterculia nobilis's seed and Gleditsia sinensis Seeds.
comparative example 2
The difference of the present embodiment and embodiment 4 is not add poly-fennel sodium sulfonate.
comparative example 3
The difference of the present embodiment and embodiment 4 is not add non-ion fluorin carbon surface active agent.
performance Detection:
By embodiment of the present invention 1-4 gained finished product and comparative example 1-3 gained finished product, process recovered water, after the recovered water after process is used as reinjected water, its scale inhibition effect and corrosion mitigating effect are as following table 1:
Table 1
| ? | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Comparative example 1 | Comparative example 2 | Comparative example 3 |
| Scale inhibition performance, % | 98.2 | 99.1 | 99.9 | 99.8 | 80 | 85 | 86 |
| Corrosion inhibition rate, % | 96.5 | 96.2 | 98.4 | 97.8 | 72 | 78 | 69 |
As can be seen from Table 1, in embodiment 1-4, embodiment 3 is optimum embodiment, and scale inhibition effect and corrosion mitigating effect are all best.The effect of comparative example 1-3 is all inferior to embodiment, illustrates in the present invention's formula to have good synergy.
Claims (6)
1. an oil field reinjection water Scale inhibitors, it is characterized in that, comprise the following component according to weight parts: fresh sterculia nobilis's seed 0.5-1 part, fresh Gleditsia sinensis Seeds 1-3 part, diethylene triamine pentamethylene phosphonic 10-15 part, poly-aspartic-acid 12-16 part, ethoxylated dodecyl alcohol tartrate 4-7 part, chitosan 2-5 part, Sodium salts humic acids 3-4 part, poly-fennel sodium sulfonate 6-11 part, non-ion fluorin carbon surface active agent 0.5-1 part, polyoxyethylene glycol 2-5 part, water 30-50 part.
2. oil field reinjection water Scale inhibitors according to claim 1, it is characterized in that, comprise the following component according to weight parts: 0.7 part, fresh sterculia nobilis's seed, fresh Gleditsia sinensis Seeds 2 parts, diethylene triamine pentamethylene phosphonic 12 parts, poly-aspartic-acid 13 parts, ethoxylated dodecyl alcohol tartrate 6 parts, chitosan 4 parts, Sodium salts humic acids 3.6 parts, poly-fennel sodium sulfonate 9 parts, non-ion fluorin carbon surface active agent 0.8 part, polyoxyethylene glycol 4 parts, 35 parts, water.
3. oil field reinjection water Scale inhibitors according to claim 1, it is characterized in that, comprise the following component according to weight parts: 0.9 part, fresh sterculia nobilis's seed, fresh Gleditsia sinensis Seeds 2.4 parts, diethylene triamine pentamethylene phosphonic 14 parts, poly-aspartic-acid 15 parts, ethoxylated dodecyl alcohol tartrate 5 parts, chitosan 3 parts, Sodium salts humic acids 3.8 parts, poly-fennel sodium sulfonate 7 parts, non-ion fluorin carbon surface active agent 0.6 part, polyoxyethylene glycol 3 parts, 46 parts, water.
4. the preparation method of oil field reinjection water Scale inhibitors according to claim 1, is characterized in that, comprise the steps:
Step (1), is 30-35% by fresh sterculia nobilis's seed and Gleditsia sinensis Seeds natural air drying to water ratio, is then crushed to 100-200 order with micronizer mill, then by it as in water, at 40-50 DEG C, after ultrasonic 30-50min, leave standstill, centrifugal, get supernatant liquid;
Step (2), adds ethoxylated dodecyl alcohol tartrate, chitosan, Sodium salts humic acids, non-ion fluorin carbon surface active agent successively in the mixed solution of the supernatant liquid that polyoxyethylene glycol and step (1) obtain, is stirred to after mixing, obtains premix material;
Step (3), adds diethylene triamine pentamethylene phosphonic, poly-aspartic-acid and poly-fennel sodium sulfonate successively in the premix material that step (2) obtains, is warming up to 50-60 DEG C, after stirring 1-2h, leaves standstill naturally cooling, to obtain final product.
5. the preparation method of oil field reinjection water Scale inhibitors according to claim 4, is characterized in that speed centrifugal in step (1) is 2800-3000r/min.
6., according to the preparation method of oil field reinjection water Scale inhibitors according to claim 4, it is characterized in that the speed stirred in step (3) is 100-200r/min.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104874329A (en) * | 2015-06-03 | 2015-09-02 | 中国科学院沈阳应用生态研究所 | Application of plant source surface active agent |
| CN106315877A (en) * | 2016-10-13 | 2017-01-11 | 林少忠 | Corrosion and scale inhibitor for oil field as well as preparation method and application of corrosion and scale inhibitor |
| CN106348469A (en) * | 2016-08-29 | 2017-01-25 | 山东胜伟园林科技有限公司 | Efficient salt resistance scale inhibitor and application thereof |
| CN106430425A (en) * | 2016-11-04 | 2017-02-22 | 中海油天津化工研究设计院有限公司 | Reverse osmosis membrane anti-scale agent applicable to garbage leachate treatment system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101607767A (en) * | 2009-06-09 | 2009-12-23 | 新疆德蓝股份有限公司 | A kind of preparation that is used for the neutral composite scale inhibitor of oil field reinjection water |
| CN103708629A (en) * | 2014-01-02 | 2014-04-09 | 山东化友化学有限公司 | Special solid corrosion and scale inhibitor for oilfield reinjection water |
| CN103805152A (en) * | 2014-02-24 | 2014-05-21 | 山东省泰和水处理有限公司 | Scale and corrosion inhibitor for oilfield water injection and preparation method thereof |
| CN103991974A (en) * | 2014-05-16 | 2014-08-20 | 威海翔宇环保科技有限公司 | Oilfield reinjection water scale inhibitor and preparation method thereof |
-
2014
- 2014-09-07 CN CN201410451303.5A patent/CN104230016A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101607767A (en) * | 2009-06-09 | 2009-12-23 | 新疆德蓝股份有限公司 | A kind of preparation that is used for the neutral composite scale inhibitor of oil field reinjection water |
| CN103708629A (en) * | 2014-01-02 | 2014-04-09 | 山东化友化学有限公司 | Special solid corrosion and scale inhibitor for oilfield reinjection water |
| CN103805152A (en) * | 2014-02-24 | 2014-05-21 | 山东省泰和水处理有限公司 | Scale and corrosion inhibitor for oilfield water injection and preparation method thereof |
| CN103991974A (en) * | 2014-05-16 | 2014-08-20 | 威海翔宇环保科技有限公司 | Oilfield reinjection water scale inhibitor and preparation method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104874329A (en) * | 2015-06-03 | 2015-09-02 | 中国科学院沈阳应用生态研究所 | Application of plant source surface active agent |
| CN106348469A (en) * | 2016-08-29 | 2017-01-25 | 山东胜伟园林科技有限公司 | Efficient salt resistance scale inhibitor and application thereof |
| CN106315877A (en) * | 2016-10-13 | 2017-01-11 | 林少忠 | Corrosion and scale inhibitor for oil field as well as preparation method and application of corrosion and scale inhibitor |
| CN106430425A (en) * | 2016-11-04 | 2017-02-22 | 中海油天津化工研究设计院有限公司 | Reverse osmosis membrane anti-scale agent applicable to garbage leachate treatment system |
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Application publication date: 20141224 |