CN1583942A - Fuel thickening chemical producing aid and use thereof - Google Patents
Fuel thickening chemical producing aid and use thereof Download PDFInfo
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- CN1583942A CN1583942A CN 200410027471 CN200410027471A CN1583942A CN 1583942 A CN1583942 A CN 1583942A CN 200410027471 CN200410027471 CN 200410027471 CN 200410027471 A CN200410027471 A CN 200410027471A CN 1583942 A CN1583942 A CN 1583942A
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Abstract
Whether invention this diclose on congeal oil chemistr is it adopt pharmaceutical to help, is it quarry pharmaceutical with manner of weight of the following composition mixture to help. Ion 3-15 of surface-active agnet, anion 5-40 of surface-active agent, high polymer polypropylene acyl amine polypropylene acyl 1-5 of amine, 10-50 of water, ion type surface-active agent whether C8-C12 alkyl phenol gather oxygen ethylene ether, mountain pear alcohol ester type gather oxygen ethylene mountain pear alcohol ester type, the anion surface-active agent is the sweet-smelling base sulfonic acid sodium of C8-C12 alkyl, the high polymer and polypropylene acyl amine and polypropylene acyl amine are that the molecular weight is high polymer and polypropylene acly amine of 6 million-30 million, is it quarry pharmaceutical can contain yellow original glue 1-5 also, through congeal pit shaft or sleeve pipe of oil well is it quarry pharmaceutical inject the stratum into to help, make simply, easy to use, use the advantage such as being effectural, can drop congealing the oil solidifying point to under 5deg.C, above zero degree. Can is its congeal mobility of oil to improve, realize cold to adopt smoothly, is it exploit petroleum congeal oil use to suited to extensively effectively.
Description
Technical field the present invention relates to a kind of oiling that coagulates and learns adjuvant and application, more particularly, relate to a kind of height oil freezing point with fixed attention that is used for reducing, improve height and coagulate oily low-temperature fluidity, be lower than cold adjuvant of oiling with fixed attention and the application of adopting of the following pour point depression of freezing point temperature to realize the high oil that coagulates.
Background technology finds height to be coagulated the water-soluble oiling adjuvant that coagulates of oily emulsification pour point depression in the prior art as yet.In coagulating oily recovery process, coagulate oil because of its wax content height, zero pour is just high, the flowability that causes coagulating oil with the separating out of the reduction of temperature and wax, coalescent, deposit and be set in immediate vicinity of wellbore and the pit shaft, be difficult to flow, for the exploitation of coagulating oil brings difficulty.Domestic and international existing height coagulates oily production technique and mainly uses heating exploitation, i.e. steam treatment heating method solves height and coagulates oily mining problem; Utilize the auxiliary methods such as hot water, hollow sucker rod heating carrier, heating sucker rod of mixing of pit shaft to solve the blocking problem of coagulating oil well in addition.Above-mentionedly coagulate oily production technique energy consumption height, investment is big, equipment requirements is special, complex process, and can not generally adopting because of the actual conditions restriction.
Summary of the invention the object of the present invention is to provide a kind of oiling that coagulates to learn adjuvant, under the condition that does not heat, learn the aqueous solution injection stratum and the pit shaft of adjuvant with coagulating oiling, utilize physico-chemical process, regulate the stratum oil and water interfacial tension, emulsification is coagulated oil and is reduced the zero pour of coagulating oil, improves the high oil flowability at low temperatures of coagulating, and effectively realizes coagulating oil cooling and adopts and coagulate oil well tube pour point depression.
In order to achieve the above object, the invention provides following technical scheme: develop a kind of oiling that coagulates and learn adjuvant, contain tensio-active agent, high polymer polyacrylamide or modified high-molecular polyacrylamide, described adjuvant is the mixture with following composition and parts by weight: 3～15 parts of nonionogenic tensides, 5～40 parts of anion surfactants, 1～5 part of high polymer polyacrylamide, 10～50 parts in water, described nonionic surface active agent is C
8～C
12The mixture of a kind of or its several arbitrary proportions of alkylphenol polyoxyethylene class, sorbitol ester class and polyoxyethylene sorbitan ester class, described anion surfactant are C
8～C
18The mixture of a kind of or its several arbitrary proportions of sodium alkylarysulfonate, described polyacrylamide are that molecular weight is 6,000,000～3,000 ten thousand the high polymer polyacrylamide or the high polymer polyacrylamide of modification.Coagulate the aqueous solution that oiling learns adjuvant and coagulate after oil contact, adsorb on the oil reservoir surface, sprawl, infiltration, wetting, emulsification and dissemination, the emulsion that forms oil-in-water (O/W) evenly and be dispersed in the water the better flowability that maintenance is oily with fixed attention.Stop high coagulate in the oil wax be lower than under the freezing point temperature separate out, coalescent, deposit and solidify, reduce high zero pour of coagulating oil.Tensio-active agent plays adjusting oil-water-rock surface tension force in coagulating oily adjuvant, the effect of amphipathic property, rise the infiltration of coagulating oil, wetting, emulsification and dissemination.Water-soluble polymer polyacrylamide (polyacrylamind) plays thickening, water dispersion stabilization in coagulating oily adjuvant.Use of the present invention coagulating after oiling learns adjuvant, the zero pour that can guarantee to coagulate oil+5 ℃ with down to above zero, high to coagulate oil still be flowable state, thereby effectively realized oily with fixed attention smooth cold the adopting and the pit shaft pour point depression of height.
The present invention's technical scheme preferably is: contain 1～5 part of xanthan gum in the adjuvant mixture.Xanthan gum is Xanthomonas campestris polysaccharide (X
c, xanthan gun), be dissolved in the water at low temperature, be a kind of pseudoplastic fluid, have the characteristics of " shear shinning ", add a small amount of xanthan gum, both helped reducing high oil viscosity with fixed attention, helped keeping high stability of coagulating oil again, be convenient to realize cold adopting smoothly at the water dispersion that adds adjuvant formation.
The present invention's technical scheme preferably can be: adjuvant is the mixture with following composition and parts by weight: 8～10 parts of nonionogenic tensides, 20～30 parts of anion surfactants, 3～4 parts of high polymer polyacrylamides, 25～35 parts in water, this prescription is an optimum formula of the present invention, the ratio of each composition is moderate, uses and regulates the stratum oil and water interfacial tension, and it is splendid to improve the high oil mobile effect at low temperatures of coagulating.
The present invention's technical scheme preferably can be again: contain 2～3 parts of xanthan gum in the adjuvant mixture.Prescription by claim 3 uses, and there is no need to add more xanthan gum, and what add does not then have remarkable effect to reducing the high oil viscosity that coagulates with the stability that keeps water dispersion very little.
The present invention's technical scheme preferably can be again: alkylphenol polyoxyethylene is polyoxyethylene octylphenol ether, polyoxyethylene nonylphenol ether, dodecyl phenol polyethenoxy ether.Above-mentioned three kinds of compounds are cheap and easy to get, and the performance of product is also better, are fit to more adopt.
The present invention's technical scheme preferably also can be: the sorbitol ester class is that this dish class tensio-active agent is sorbitan monolaurate (this dish-20), sorbyl alcohol monopalmitate (this dish-40), sorbitol monostearate (this dish-60), sorbyl alcohol tristearate (Span-65), sorbitol monooleate (Span-80), sorbyl alcohol sesquioleate (Span-83), sorbitol olein (this dish-85).All are emulsifying agents preferably, are suitable for making adjuvant and use.
The present invention's technical scheme preferably can also be: the polyoxyethylene sorbitan ester class is that the Tweens tensio-active agent is polyoxyethylene sorbitan monolaurate (tween 20), polyoxyethylene (4) sorbitan monolaurate (tween-21), polyoxyethylene sorbitol monopalmitate (Tween-40), polyoxyethylene sorbitol monostearate (Tween-60), polyoxyethylene (4) sorbitol monostearate (tween-61), Polyoxyethylene sorbitol tristearate (Tween-65), octadecanoic acid ester of polyethylene glycol (tween-80,81), polyoxyethylene sorbitol trioleate (tween 85).Above-mentioned Tweens compound all is emulsifying agents, is formed by hydroxyl and ethylene oxide condensation in this dish class emulsifying agent molecule, and water-soluble and easy dispersion is as better with this dish class emulsifier mix result of use.
The present invention's technical scheme preferably can be again: sodium alkylarysulfonate is Sodium dodecylbenzene sulfonate, dodecyl sodium naphthasulfonate.Above-mentioned two kinds of compounds are the most frequently used aniorfic surfactant, have good wettability, are wetting agent, emulsifying agent and dispersion agent preferably, are suitable for using as the composition of adjuvant.
The application of adjuvant of the present invention: be used for the high oil cooling that coagulates when adopting, by pit shaft or the sleeve pipe that coagulates oil well adjuvant is injected the stratum, realize coagulating the stratum emulsification pour-viscosity reduction of oil, or adjuvant is injected pit shaft, realize coagulating the pit shaft emulsification pour-viscosity reduction of oil by pit shaft or the sleeve pipe that coagulates oil well.After injecting the stratum, after coagulating the aqueous solution of oiling adjuvant and coagulating oily the contact, adsorb on oil reservoir surface, sprawl, the emulsion of infiltration, wetting, emulsification and dissemination formation oil-in-water (O/W), keep coagulating the better flowability of oil, stop high coagulate in the oil wax be lower than under the freezing point temperature separate out, coalescent, deposit and solidify, can make and high coagulate the depression of the freezing point of oil and reach+below 5 ℃, above zero, effectively realize coagulating chemical cold the adopting of oil.When being used for high-solidifiability oil well tube pour point depression, by pit shaft or the sleeve pipe that coagulates oil well adjuvant is injected pit shaft, effectively the oily with fixed attention pit shaft breast flower pour point depression of realization falls to help and adopts.
Compared with prior art, the present invention has following tangible advantage: 1, technique effect is good: adjuvant pour point depression efficient height of the present invention, and can make the depression of the freezing point of high oil with fixed attention arrive+5 ℃ with down to above zero, effectively realize chemical cold the adopting of oil with fixed attention; 2, make simple and good water solubility: during manufacturing, described nonionogenic tenside, anion surfactant, polyacrylamide and xanthan gum and each composition of water are got final product by metering mixing stirring, coagulate oily adjuvant with solvent-borne type and compare, no fire-fighting taboo, transportation and safe in utilization; 3, easy to use: pit shaft or sleeve pipe by the heavy crude petroleum well directly inject the stratum with adjuvant, adsorb on oil reservoir surface, sprawl, the emulsion of infiltration, wetting, emulsification and dissemination formation oil-in-water (O/W), keep coagulating the better flowability of oil, stop high coagulate in the oil wax be lower than under the freezing point temperature separate out, coalescent, deposit and solidify, can make high to coagulate the depression of the freezing point of oil and reach+5 ℃ with down to above zero, effectively realizes coagulating chemical cold the adopting of oil; 4, low energy: avoided the use heating exploitation, do not need other off-set facility, energy consumption is low, investment is little, energy conservation and consumption reduction effects is remarkable, owing to do not need other off-set facility, can not be subjected to condition restriction during use, thereby can generally adopt, also can utilize the oil field reinjection water dilution, recycle water saving; 5, environmental protection: do not have element and the material that organophosphorus, organochlorine, highly basic, heavy metal etc. damage stratum, oil reservoir and underground water in the adjuvant composition of the present invention, pollution-free, height being coagulated the following process of oil does not have influence, and metallic conduit is had certain corrosion inhibition.
By specific embodiment the present invention is carried out more detailed description below the embodiment:
The preparation of embodiment 1 adjuvant
It is 2,000 ten thousand polyacrylamide 20 grams, water 200 grams that example 1-1 takes by weighing tensio-active agent polyoxyethylene octylphenol ether 15 gram, this dish-20 (sorbitan monolaurate) 25 grams, octadecyl phenylbenzimidazole sulfonic acid sodium 180 grams, molecular weight, add in the 500ml volumetrical beaker, be stirred to whole dissolvings and be solution state and get final product.
Embodiment 1-2～1-10 method is with routine 1-1, and concrete metering sees Table 1.
Table 1 adjuvant proportioning components one is pulled the list position: gram
| Composition | Example 1-2 | Example 1-3 | Example 1-4 | Example 1-5 | Example 1-6 | Example 1-7 | Example 1-8 | Example 1-9 | ??1-10 |
| ??A | ??20 | ??7 | |||||||
| ??B | ??15 | ??10 | |||||||
| ??C | ??30 | ??13 | |||||||
| ??D | ??30 | ??120 | ??65 | ||||||
| ??E | ??60 | ??70 | |||||||
| ??F | ??125 | ??25 |
| ?G | ??25 | ??100 | ??110 | ||||||
| ?H | ??40 | ??80 | ??105 | ||||||
| ?S-20 | ??20 | ||||||||
| ?S-40 | ??5 | ??15 | |||||||
| ?S-60 | ??30 | ||||||||
| ?S-65 | ??18 | ||||||||
| ?S-80 | ??15 | ||||||||
| ?S-83 | ??7 | ||||||||
| ?S-85 | ??10 | ||||||||
| ?T-20 | ??3 | ||||||||
| ?T-21 | ??37 | ||||||||
| ?T-40 | ??5 | ||||||||
| ?T-60 | ??5 | ||||||||
| ?T-61 | ??12 | ||||||||
| ?T-65 | ??8 | ||||||||
| ?T-80 | ??15 | ||||||||
| ?T-81 | ??5 | ||||||||
| ?T-85 | ??25 | ||||||||
| ?I | ?5 | ??25 | ??18 | ??15 | ??20 | ??20 | ??23 | ??12 | ??16 |
| ?J | ??5 | ??25 | ??20 | ||||||
| Water | ?120 | ??200 | ??150 | ??180 | ??250 | ??160 | ??60 | ??120 | ??150 |
In the table: A-polyoxyethylene octylphenol ether, B-polyoxyethylene nonylphenol ether, C-dodecyl phenol polyethenoxy ether, the D-Sodium dodecylbenzene sulfonate, E-dodecyl sodium naphthasulfonate, F-octyl sodium naphthasulfonate, G-octadecyl benzene sulfonic acid sodium salt, H-18 dialkyl group sodium naphthasulfonates, I-polyacrylamide, J-xanthan gum, S-Si coils compounds, concrete chemical name sees before, T-Tweens compound, and concrete chemical name sees before.
Wherein, routine 1-3 contains xanthan gum in 5,7 the adjuvant, and its content is respectively 1,5,4 parts, does not contain xanthan gum among all the other embodiment.
The Molecular Weight for Polyacrylamide that embodiment 2-1～2-10 uses respectively is 6,000,000,1,000 ten thousand, 1,200 ten thousand, 1,500 ten thousand, 2,000 ten thousand, 2,200 ten thousand, 3,000 ten thousand.
The application of embodiment 2 adjuvants
The oil sample 100 that coagulates that example 2-1 takes by weighing 40 ℃ at zero pour restrains, adjuvant 100 grams that add embodiment 1-2, stir a little, in 45 ℃ thermostat water bath, placed 30 minutes, take out the sample in the beaker and place it in the flowability of coagulating the profit dispersion in the freezer compartment in the cup of observed temperature reduction back, read temperature, coagulate oil to 5 ℃ in the temperature reduction process and stop to flow with mercurythermometer, and under this temperature constant temperature 2 hours, observation stable case and reading of data.Coagulating the depression of the freezing point number of degrees of oiling adjuvant is: 40-5=35 ℃.
Example 2-2 gets adjuvant 100 grams of embodiment 1-3, coagulate oil 100 grams with Suqian, Jiangsu Province 4# pipe, recording oily with fixed attention zero pour is 40 ℃, and the zero pour after using the method processing of embodiment 2-1 and measuring the adding adjuvant is+3 ℃, and the depression of the freezing point number of degrees of oiling adjuvant are with fixed attention: 40-3=37 ℃.The adjuvant of embodiment 1-3 is injected the stratum by the pit shaft that coagulates oil well, realized+coagulated more than 3 ℃ cold the adopting of oil.
Example 2-3 gets adjuvant 100 grams of embodiment 1-6, coagulate oil 100 grams with Suqian, Jiangsu Province 3# pipe, recording oily with fixed attention zero pour is 43 ℃, and the zero pour after using the method processing of embodiment 2-1 and measuring the adding adjuvant is+5 ℃, and the depression of the freezing point number of degrees of oiling adjuvant are with fixed attention: 43-5=38 ℃.The adjuvant of embodiment 1-6 is injected the stratum by the sleeve pipe that coagulates oil well, realized+coagulated more than 5 ℃ cold the adopting of oil.
Example 2-4 gets adjuvant 100 grams of embodiment 1-7, coagulate oil 100 grams with the Liaohe River, recording oily with fixed attention zero pour is 53 ℃, is+5 ℃ with the method processing of the routine 2-1 of embodiment and the zero pour behind the mensuration adding adjuvant, coagulates the depression of the freezing point number of degrees of oiling adjuvant and is: 53-5=48 ℃.The adjuvant of embodiment 1-7 is injected the stratum by the pit shaft that coagulates oil well, realized+coagulated more than 5 ℃ cold the adopting of oil.
Claims (9)
1, a kind of oiling that coagulates is learned adjuvant, contains tensio-active agent, high polymer polyacrylamide or modified high-molecular polyacrylamide, and it is characterized in that: adjuvant is the mixture with following composition and parts by weight:
3～15 parts of nonionogenic tensides
5～40 parts of anion surfactants
1～5 part of high polymer polyacrylamide
10～50 parts in water
Described nonionic surface active agent is C
8～C
12The mixture of a kind of or its several arbitrary proportions of alkylphenol polyoxyethylene class, sorbitol ester class and polyoxyethylene sorbitan ester class, described anion surfactant are C
8～C
18The mixture of a kind of or its several arbitrary proportions of sodium alkylarysulfonate, described polyacrylamide are that molecular weight is 6,000,000～3,000 ten thousand the high polymer polyacrylamide or the high polymer polyacrylamide of modification.
2, the oiling that coagulates according to claim 1 is learned adjuvant, it is characterized in that: contain 1～5 part of xanthan gum in the adjuvant mixture.
3, the oiling that coagulates according to claim 1 is learned adjuvant, and it is characterized in that: adjuvant is the mixture with following composition and parts by weight:
8～10 parts of nonionogenic tensides
20～30 parts of anion surfactants
3～4 parts of high polymer polyacrylamides
25～35 parts in water
4, the oiling that coagulates according to claim 3 is learned adjuvant, it is characterized in that: contain 2～3 parts of xanthan gum in the adjuvant mixture.
5, adjuvant according to claim 1 is characterized in that: alkylphenol polyoxyethylene is polyoxyethylene octylphenol ether, polyoxyethylene nonylphenol ether, dodecyl phenol polyethenoxy ether.
6, adjuvant according to claim 1 is characterized in that: the sorbitol ester class is sorbitan monolaurate, sorbyl alcohol monopalmitate, sorbitol monostearate, sorbyl alcohol tristearate, sorbitol monooleate, sorbyl alcohol sesquioleate, sorbitol olein.
7, adjuvant according to claim 1 is characterized in that: polyoxyethylene sorbitol acid anhydride ester class is polyoxyethylene sorbitan monolaurate, polyoxyethylene (4) sorbitan monolaurate, polyoxyethylene sorbitol monopalmitate, polyoxyethylene sorbitol monostearate, polyoxyethylene (4) sorbitol monostearate, Polyoxyethylene sorbitol tristearate, octadecanoic acid ester of polyethylene glycol, polyoxyethylene sorbitol trioleate.
8, adjuvant according to claim 1 is characterized in that: sodium alkylarysulfonate is Sodium dodecylbenzene sulfonate, dodecyl sodium naphthasulfonate.
9, the application of the described adjuvant of claim 1, it is characterized in that: be used for the high oil cooling that coagulates when adopting, by pit shaft or the sleeve pipe that coagulates oil well adjuvant is injected the stratum, realize coagulating the stratum emulsification pour-viscosity reduction of oil, or by the pit shaft or the sleeve pipe of oil well inject pit shaft with adjuvant, the pit shaft emulsification pour-viscosity reduction that realization is oily with fixed attention with fixed attention.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410027471 CN1240806C (en) | 2004-06-02 | 2004-06-02 | Fuel thickening chemical producing aid and use thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410027471 CN1240806C (en) | 2004-06-02 | 2004-06-02 | Fuel thickening chemical producing aid and use thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1583942A true CN1583942A (en) | 2005-02-23 |
| CN1240806C CN1240806C (en) | 2006-02-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410027471 Expired - Fee Related CN1240806C (en) | 2004-06-02 | 2004-06-02 | Fuel thickening chemical producing aid and use thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101280182B (en) * | 2007-04-04 | 2010-10-06 | 中国石油化工股份有限公司 | Surfactant composition and use thereof |
| CN101280180B (en) * | 2007-04-04 | 2011-02-09 | 中国石油化工股份有限公司 | Surfactant composition and use thereof |
| CN101280181B (en) * | 2007-04-04 | 2011-02-09 | 中国石油化工股份有限公司 | Surfactant composition and use thereof |
| CN102212344A (en) * | 2011-04-08 | 2011-10-12 | 西安石油大学 | High-temperature foam scrubbing agent for drainage gas recovery |
| CN102277149A (en) * | 2010-06-11 | 2011-12-14 | 中国石油天然气股份有限公司 | Low-permeability oil field surfactant oil displacement agent |
| CN102618243A (en) * | 2012-03-02 | 2012-08-01 | 中国石油天然气股份有限公司 | Pour point depressing and viscosity reducing agent for high-condensation-point heavy oil |
| EP2459672A4 (en) * | 2009-07-29 | 2013-10-23 | Univ City New York Res Found | Methods for thickening hydrophobic liquids with amphiphilic esters |
| CN103666429A (en) * | 2012-09-04 | 2014-03-26 | 中国石油天然气股份有限公司 | Surfactant compound system for oil displacement of low-permeability oil field |
| CN108641698A (en) * | 2018-04-23 | 2018-10-12 | 谢新昇 | A kind of preparation method of polydactyl acid base heavy crude thinner |
| CN115386359A (en) * | 2022-11-01 | 2022-11-25 | 山东东方盛嘉石油科技有限责任公司 | Viscous oil cold-production dispersing huff and puff viscosity reducer and preparation method thereof |
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| CN101665685B (en) * | 2009-09-14 | 2012-11-14 | 天津师范大学 | Oil-displacing agent for enhancing crude oil recovery efficiency in tertiary recovery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101280182B (en) * | 2007-04-04 | 2010-10-06 | 中国石油化工股份有限公司 | Surfactant composition and use thereof |
| CN101280180B (en) * | 2007-04-04 | 2011-02-09 | 中国石油化工股份有限公司 | Surfactant composition and use thereof |
| CN101280181B (en) * | 2007-04-04 | 2011-02-09 | 中国石油化工股份有限公司 | Surfactant composition and use thereof |
| EP2459672A4 (en) * | 2009-07-29 | 2013-10-23 | Univ City New York Res Found | Methods for thickening hydrophobic liquids with amphiphilic esters |
| CN102277149A (en) * | 2010-06-11 | 2011-12-14 | 中国石油天然气股份有限公司 | Low-permeability oil field surfactant oil displacement agent |
| CN102277149B (en) * | 2010-06-11 | 2013-12-04 | 中国石油天然气股份有限公司 | Low-permeability oil field surfactant oil displacement agent |
| CN102212344A (en) * | 2011-04-08 | 2011-10-12 | 西安石油大学 | High-temperature foam scrubbing agent for drainage gas recovery |
| CN102618243A (en) * | 2012-03-02 | 2012-08-01 | 中国石油天然气股份有限公司 | Pour point depressing and viscosity reducing agent for high-condensation-point heavy oil |
| CN102618243B (en) * | 2012-03-02 | 2013-10-16 | 中国石油天然气股份有限公司 | Pour point depressing and viscosity reducing agent for high-condensation-point heavy oil |
| CN103666429A (en) * | 2012-09-04 | 2014-03-26 | 中国石油天然气股份有限公司 | Surfactant compound system for oil displacement of low-permeability oil field |
| CN108641698A (en) * | 2018-04-23 | 2018-10-12 | 谢新昇 | A kind of preparation method of polydactyl acid base heavy crude thinner |
| CN115386359A (en) * | 2022-11-01 | 2022-11-25 | 山东东方盛嘉石油科技有限责任公司 | Viscous oil cold-production dispersing huff and puff viscosity reducer and preparation method thereof |
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