CN104831401A - Oil-soluble temporary blocking agent and preparation method thereof - Google Patents
Oil-soluble temporary blocking agent and preparation method thereof Download PDFInfo
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- CN104831401A CN104831401A CN201510173036.4A CN201510173036A CN104831401A CN 104831401 A CN104831401 A CN 104831401A CN 201510173036 A CN201510173036 A CN 201510173036A CN 104831401 A CN104831401 A CN 104831401A
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Abstract
The present invention discloses an oil-soluble temporary blocking agent and a preparation method thereof, wherein a thermoplastic polymer or a mixture comprising a thermoplastic polymer and one or a plurality of materials selected from a surfactant, an antioxidant and a coupling agent is adopted as a spinning raw material and is subjected to melt electrospinning to prepare the oil-soluble temporary blocking agent. According to the present invention, the oil-soluble temporary blocking agent can be adopted as the temporary blocking agent so as to be applied in the petroleum extraction field, such that the purposes of low cost and complete petroleum extraction and no pollution are achieved; the average diameter of the obtained temporary blocking agent of the present invention is a few microns to tens of microns, even achieves the nano-scale, the distribution is wide, and the oil-soluble temporary blocking agent is suitable for various types of oil wells with complex structures, particularly the temporary blocking operation on the core with the small crack width; the oil-soluble temporary blocking agent has characteristics of high oil dissolution rate, water insolubility, acid insolubility, low residual pollution on stratum, high solubility in diesel fuel, and easy blocking releasing; and the preparation method has characteristics of easily available raw materials, simple preparation process, low cost, and good applicability.
Description
Technical field
The present invention relates to and utilize melt electrostatic spinning technology, prepare a kind of diverting agent, make it have good oil-soluble, thus field of petroleum exploitation can be applied to as a kind of diverting agent, reach the abundant recover petroleum of low cost and free of contamination object, belong to oil field chemical field.
Background technology
Along with large quantities of mature oilfield enters withered term successively, the study hotspot of countries in the world is become to the exploitation again of water flood field.But, even also only can obtain the underground crude oil of 25% ~ 35% through waterflooding extraction, in oil reservoir, still have the reservoir do not employed in a large number or the lower oil reservoir of development degree to exist.Water flooding recovery not only harvest efficiency is low, and continually developing for a long time along with water flood field, after entering the mid-later development phase stage, occur that oil field composite water cut rises, the operations such as well workover, kill-job, sand washing are frequent, workover fluid stratum of bleeding pollutes, and oilfield exploitation benefit such as to be deteriorated year by year at the serious problems.Therefore, most of oil field takes to block up temporarily by carrying out short-term to some aspect of well in operation, thus exploits target zone crude oil, to improve the recovery ratio of crude oil.Water-soluble diverting agent preferentially enters the duct of not oil-containing, even if there is the duct entering oil-containing on a small quantity, and also difficulty de-plugging voluntarily, and also the solid free brine filter loss used is large, and also larger to equipment installation corrosivity.Compared with water-soluble diverting agent, oil-soluble temporary plugging agent has significantly selective, and its reversible action, can structure of oil well be protected, be conducive to follow-up lasting exploitation.Thus, oil-soluble temporary plugging agent be developed to research contents of attaching most importance to.Current development oil-soluble temporary plugging agent kind is out more, but high expensive, be difficult to extensive use, the new oil-soluble temporary plugging agent that development cost is cheap is very necessary.Invention one utilizes melt electrostatic spinning technology, prepare a kind of fine polymer structure, make it have good oil-soluble, thus field of petroleum exploitation can be applied to as a kind of diverting agent, reach the abundant recover petroleum of low cost and free of contamination object.The present invention takes full advantage of that melt electrostatic spinning technology is simple to operation, and spinning material is with low cost, has no side effect, the advantages such as fiber production is high, and size is little, and specific area is large, the diverting agent obtained fully is contacted with oil, there is higher oil-soluble, and there is certain stifled temporarily intensity.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of diverting agent and preparation method thereof with good oil-soluble and temporary stifled intensity.
For solving the problems of the technologies described above, the technical scheme that the present invention proposes is: provide a kind of diverting agent having good oil-soluble and block up intensity temporarily, it is characterized in that diverting agent is by thermoplastic polymer or thermoplastic polymer and surfactant, antioxidant, one or more the mixture in coupling agent is that spinning material is prepared through melt electrostatic spinning.
For solving the problems of the technologies described above, the present invention proposes a kind of preparation method with the diverting agent of good oil-soluble and temporary stifled intensity.Capital equipment comprises: high-voltage pulse power source, melt electrostatic spinning ejecting device, heating collar, dash receiver.
Preparation method is as follows:
With thermoplastic polymer or thermoplastic polymer and surfactant, antioxidant, one or more the mixture in coupling agent is spinning material, adopts melt electrostatic spinning method to prepare diverting agent.Melt electrostatic spinning optimum configurations: spinning distance 2-18cm, spinning voltage 30-90kV, frequency and the pulse registration of high-voltage pulse power source are fixed value, and spinning temperature is the above 10-60 DEG C of melt temperature of spinning material.
In preparation method of the present invention, thermoplastic polymer is polyethylene, polypropylene, polyamide, phenolic resins, polyester, PLA, one or more compositions in polycaprolactone.
In preparation method of the present invention, surfactant is perfluoroalkyl, aliphatic group, aryl radical, mixing alkyl or its mixture.
In preparation method of the present invention, antioxidant is antioxidant 1010, antioxidant 168, antioxidant 164 or its mixture.
In preparation method of the present invention, coupling agent is silane coupler, titanate coupling agent or its mixture.
In preparation method of the present invention, diverting agent is micron order or nano level long fiber or staple fibre, irregular microballon, microballoon or its mixed form.
In preparation method of the present invention, for spinning experiment each time, frequency and the pulse registration of high-voltage pulse power source are fixed, then can according to different spinning conditions and diverting agent features of shape regulating frequency and pulse for different spinning experiment.
The present invention compared with prior art, has following advantage:
The average diameter of gained diverting agent is several microns to tens microns, even can reach nanoscale, adjustable length, and it is wide to distribute, and is applicable in the oil well of all kinds of labyrinth, and the rock core that particularly Fracture Width is little is stifled operation temporarily; Oil solution ratio is high, and water is insoluble, and acid is insoluble, and formation residual contamination is little; Solubility in diesel oil is large, is easy to remove blocking; Raw material is easy to get, and preparation process is simple, and with low cost, applicability is good.
Detailed description of the invention
Example one:
With block phenolic resins for spinning material carries out melt electrostatic spinning, spinning distance 8cm, spinning voltage 40kV, the frequency of high voltage source and pulse registration are the dutycycle of 2.12KHz and 32.5%, spinning temperature 160 DEG C.
The spinning of gained is staple fibre, below length 1cm, average diameter 4.4 μm, gets the above-mentioned fiber of about 1g, and the oil-soluble in 10ml, 90 DEG C of oil is good, dissolution time 30min, and dissolution rate is greater than 95%, and after 2 hours, staple fibre dissolves completely.
Example two:
Be that spinning material carries out melt electrostatic spinning, spinning distance 10cm, spinning voltage 60kV with particulate polypropylene, the frequency of high voltage source and pulse registration are respectively the dutycycle of 1.41 KHz and 0.9%, spinning temperature 235 DEG C.
The spinning of gained is continuous print long fiber, and average diameter 6 μm gets the above-mentioned fiber of about 1g, and the oil-soluble in 10ml, 130 DEG C of oil is good, dissolution time 35min, and dissolution rate 98%, after 2 hours, fiber dissolves completely.
Claims (4)
1. oil-soluble temporary plugging agent and preparation method thereof, it is characterized in that, diverting agent is by thermoplastic polymer or thermoplastic polymer and surfactant, antioxidant, one or more mixture in coupling agent is that spinning material is prepared through melt electrostatic spinning, melt electrostatic spinning optimum configurations: spinning distance 2-18cm, spinning voltage 30-90kV, frequency and the pulse registration of high-voltage pulse power source are fixed value, and spinning temperature is the above 10-60 DEG C of melt temperature of spinning material; Gained diverting agent is micron order or nano level long fiber or staple fibre, irregular microballon, microballoon or its mixed form, and thermoplastic polymer is polyethylene, polypropylene, polyamide, phenolic resins, polyester, PLA, one or more compositions in polycaprolactone.
2. the surfactant according to claims 1, is characterized in that, surfactant is perfluoroalkyl, aliphatic group, aryl radical, mixing alkyl or its mixture.
3. the antioxidant according to claims 1, is characterized in that, antioxidant is antioxidant 1010, antioxidant 168, antioxidant 164 or its mixture.
4. the coupling agent according to claims 1, is characterized in that, coupling agent is silane coupler, titanate coupling agent or its mixture.
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| CN201510173036.4A CN104831401A (en) | 2015-04-14 | 2015-04-14 | Oil-soluble temporary blocking agent and preparation method thereof |
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| CN201510173036.4A CN104831401A (en) | 2015-04-14 | 2015-04-14 | Oil-soluble temporary blocking agent and preparation method thereof |
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Cited By (7)
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| CN109762544A (en) * | 2019-03-14 | 2019-05-17 | 中国科学院理化技术研究所 | A kind of high temperature resistant diverting agent and its preparation method and application |
| CN109868121A (en) * | 2017-12-01 | 2019-06-11 | 中石化石油工程技术服务有限公司 | A kind of crack sealing agent and preparation method of the drilling fluid based on nano-micrometer fiber |
| CN110240894A (en) * | 2019-07-23 | 2019-09-17 | 四川宝麟新材料科技有限公司 | A kind of efficient diverting agent and preparation method thereof |
| CN111139046A (en) * | 2020-02-26 | 2020-05-12 | 刘小龙 | Polymer gel composite plugging agent and preparation method thereof |
| CN111548469A (en) * | 2020-05-06 | 2020-08-18 | 四川捷贝通能源科技有限公司 | High-strength long-acting temporary plugging agent |
| CN114479800A (en) * | 2020-11-12 | 2022-05-13 | 中国石油化工股份有限公司 | Ultrahigh temperature resistant particle plugging agent and preparation method thereof |
| CN116875288A (en) * | 2023-06-07 | 2023-10-13 | 新奥科技发展有限公司 | Composite temporary plugging agent material and preparation method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109868121A (en) * | 2017-12-01 | 2019-06-11 | 中石化石油工程技术服务有限公司 | A kind of crack sealing agent and preparation method of the drilling fluid based on nano-micrometer fiber |
| CN109762544A (en) * | 2019-03-14 | 2019-05-17 | 中国科学院理化技术研究所 | A kind of high temperature resistant diverting agent and its preparation method and application |
| CN110240894A (en) * | 2019-07-23 | 2019-09-17 | 四川宝麟新材料科技有限公司 | A kind of efficient diverting agent and preparation method thereof |
| CN111139046A (en) * | 2020-02-26 | 2020-05-12 | 刘小龙 | Polymer gel composite plugging agent and preparation method thereof |
| CN111548469A (en) * | 2020-05-06 | 2020-08-18 | 四川捷贝通能源科技有限公司 | High-strength long-acting temporary plugging agent |
| CN111548469B (en) * | 2020-05-06 | 2023-05-12 | 四川捷贝通能源科技有限公司 | High-strength long-acting temporary plugging agent |
| CN114479800A (en) * | 2020-11-12 | 2022-05-13 | 中国石油化工股份有限公司 | Ultrahigh temperature resistant particle plugging agent and preparation method thereof |
| CN116875288A (en) * | 2023-06-07 | 2023-10-13 | 新奥科技发展有限公司 | Composite temporary plugging agent material and preparation method thereof |
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Application publication date: 20150812 |