CN104293333A - Neutral blocking remover composition for oilfield oil extraction and preparation method thereof - Google Patents
Neutral blocking remover composition for oilfield oil extraction and preparation method thereof Download PDFInfo
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- CN104293333A CN104293333A CN201410489268.6A CN201410489268A CN104293333A CN 104293333 A CN104293333 A CN 104293333A CN 201410489268 A CN201410489268 A CN 201410489268A CN 104293333 A CN104293333 A CN 104293333A
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Abstract
The invention relates to a neutral blocking remover composition for oilfield oil extraction, which is prepared from the following components in parts by weight: 30-35 parts of acrylic acid-methyl acrylate copolymer, 44-50 parts of diethylene triamine pentaacetic acid, 30-35 parts of sodium polyepoxysuccinate, 30-35 parts of amine malate, 10-14 parts of sodium alkyl sulfonate, 5-8 parts of amine hydroxy ethylidene diphosphate, 10-14 parts of hydrolyzed polyacrylamide, 12-17 parts of atlapulgite, 20-25 parts of sodium persulfate, 7-10 parts of sodium lignosulfonate, 5-8 parts of tannin, 12-16 parts of sodium malate, 5-8 parts of sodium sulfosuccinate, 5-8 parts of starch, 9-12 parts of methyl lactate, 0.2-0.3 part of vanadium pentoxide and 0.1-0.3 part of diisobutyl carbinol. The neutral blocking remover composition for oilfield oil extraction has the advantages of high blocking removal speed, no corrosivity due to neutrality and no dead area, can quickly dissolve the material scales, clean the oilfield stratum and remove blocking, and does not generate the phenomenon of precipitation or secondary blocking; and the cleaning waste liquid does not need to be subjected to sewage treatment after returning to the ground.
Description
Technical field
The present invention relates to the auxiliary agent that a kind of oil oil field uses, particularly a kind of neutral unblocking agent composition of oil extraction in oil field being applicable to oil extraction in oil field and using, the invention still further relates to the preparation method of the neutral unblocking agent composition of oil extraction in oil field.
Background technology
Water flooding is the effective means of retentively stressor layer and raising recovery ratio, has been extensively to adopt both at home and abroad.But in the injecting process, causing the original balance of oil reservoir to be destroyed, the various reservoir injury problems caused thus also come one after another.Formation scaling is the common type of reservoir injury in waterflooding process.The main reason of oilfield scaling is, during oil extraction in oil field, injection water and local water are incompatible, and cause injecting the contained one-tenth dirt negatively charged ion of water, meet and produce precipitation with the scaling cations in local water, and to be deposited in oil reservoir and in producing well and gathering line, to define foulant.Especially at water filling inlet place because hole is comparatively large, local water is detained many, and inject water through excessive many, fouling is also more, and foulant is descending to outlet abundance from entrance.The precipitation of foulant, make original macrovoid become little venturi, and the original little venturi overwhelming majority is completely plugged.The druse grown in major path originally, makes fluid in advance, be subject to larger resistance, and rock permeability is declined to a great extent and has a strong impact on gathering of crude oil.
The use of ternary composite displacement system also causes formation scaling and blocking.In the local water that oil field is original, containing calcium ion, magnesium ion and iron ion, these polyvalent metal ions are dominant cation of composition dirt, and inject the mineralizer of oil-reservoir water and calcium ion, magnesium ion concentration all lower than the concentration of original reservoir water, under the effect of cationic exchange, the content reduction amplitude of these polyvalent metal ions is little.And in alkaline surfactant polymer flooding oil-field technology, add highly basic N
aoH, makes the pH of oil reservoir sharply rise to 12 ~ 14 by neutrality, in the pH environment that this is higher, occurs the inorganic salts dirt of calcium carbonate, magnesiumcarbonate, Calucium Silicate powder, Magnesium Silicate q-agent and Sulfates in oil-reservoir water.In addition the Petrocarbon acid salt surfactant also containing higher concentration in ternary composite displacement system and polyacrylamide flocculant, react with the polyvalent cation in local water, generate water-fast divalence calcium mahogany sulfonate (magnesium) salt dirt, polyacrylamide flocculant is also easily polymerized to the polymerization jelly dirt of organic materials dirt.Therefore, the petroleum-sulfonate of these inorganic salts dirts, tensio-active agent is dirty and polymer material is dirty must damage reservoir rock mineral, or even grievous injury, the fouling products of generation can cause formation oil discharge orifice gap and venturi blocking, affects the extraction of crude oil.
In order to alleviate above-mentioned detrimentally affect, at present, mainly adopt acidification to dispel block, acidification to dispel block easily produces dirty slag and secondary precipitate, secondary occurs and blocks producing well and stuck oil well pump; Also can cause corrosion etc. because of factors such as the inhibiter inefficacy in acidization, inhibiter emulsification inequality or misoperations to oil production equipment.
Summary of the invention
The object of the present invention is to provide the neutral unblocking agent composition of a kind of oil extraction in oil field, the present invention also provides the preparation method of the neutral unblocking agent composition of oil extraction in oil field.Unblocking agent of the present invention is fast to oil field stratum de-plugging speed, neutral corrosion-free, energy rapid solution various materials is dirty, realize corrosion-free safe de-plugging.
To achieve these goals, the technical scheme that the present invention takes is as follows: the neutral unblocking agent composition of a kind of oil extraction in oil field, it is characterized in that it is made up of following component and parts by weight: copolymer of acrylic acid and methyl acrylate 30 ~ 35 parts, second diene pentaacetic acid amine 44 ~ 50 parts, polyepoxy sodium succinate 30 ~ 35 parts, hydroxy-butanedioic acid amine 30 ~ 35 parts, sodium allyl sulfonate 10 ~ 14 parts, hydroxy ethylidene-diphosphate amine 5 ~ 8 parts, hydro-polyacrylamide 10 ~ 14 parts, atlapulgite 12 ~ 17 parts, Sodium Persulfate 20 ~ 25 parts, sodium lignosulfonate 7 ~ 10 parts, tannin 5 ~ 8 parts, 12 ~ 16 parts, hydroxy-butanedioic acid sodium, amber acid ester sodium sulfonate 5 ~ 8 parts, starch 5 ~ 8 parts, methyl lactate 9 ~ 12 parts, Vanadium Pentoxide in FLAKES 0.2 ~ 0.3 part and diisobutyl carbinol(DIBC) 0.1 ~ 0.3 part.
The method component of above-mentioned parts by weight being prepared into the neutral unblocking agent composition of oil extraction in oil field comprises the steps:
1, by copolymer of acrylic acid and methyl acrylate 30 ~ 35 parts, second diene pentaacetic acid amine 44 ~ 50 parts, polyepoxy sodium succinate 30 ~ 35 parts, hydroxy-butanedioic acid amine 30 ~ 35 parts, sodium allyl sulfonate 10 ~ 14 parts, hydroxy ethylidene-diphosphate amine 5 ~ 8 parts, hydro-polyacrylamide 10 ~ 14 parts and atlapulgite 10 ~ 14 parts, fragmentation is carried out with shredder, stir 40 minutes after crossing 20 mesh sieves to evenly, obtain the first powder; First powder is as the main component of unblocking agent in oil extraction in oil field;
2, by Sodium Persulfate 20 ~ 25 parts, sodium lignosulfonate 7 ~ 10 parts, tannin 5 ~ 8 parts, 12 ~ 16 parts, hydroxy-butanedioic acid sodium and amber acid ester sodium sulfonate 5 ~ 8 parts, with cone blender mix and blend 40 minutes to evenly, obtained second powder of 20 mesh sieves is crossed; Second powder is as the solvay-type supporting surfactant of unblocking agent in oil extraction in oil field;
3, by Vanadium Pentoxide in FLAKES 0.2 ~ 0.3 part and atlapulgite 2 ~ 3 parts, 40 minutes are stirred to even with cone blender, Vanadium Pentoxide in FLAKES and atlapulgite carrier are fully adsorbed, and cross obtained 3rd powder of 40 mesh sieves, the 3rd powder is as the catalyzer of unblocking agent in oil extraction in oil field;
4, by starch 5 ~ 8 parts, methyl lactate 9 ~ 12 parts and diisobutyl carbinol(DIBC) 0.1 ~ 0.3 part, stir 40 minutes with tapered mixing and blending machine, cross obtained 4th powder of 20 mesh sieves; 4th powder is as taking starch as the solid cleaning permeate agent that carrier is made;
5, by the mixing of obtained the first powder, the second powder, the 3rd powder and the 4th powder, stir and namely make the neutral unblocking agent of oil extraction in oil field.
The neutral unblocking agent composition of oil extraction in oil field provided by the invention, its outward appearance is colourless or slight yellowish is Powdered, and particle size diameter is for being less than 20 orders, and water content is less than 6%, and bulk specific gravity is 1.03 ~ 1.12g/cm
3, pH is 6 ~ 7, and corrosion rate is less than 0.1g/ (m
2.h); During oil field stratum de-plugging, the aqueous solution being mixed with mass percent concentration 2 ~ 5% according to dirt chocking-up degree water carries out de-plugging, the present invention has carried out application test in middle oily Karamay oilfield, by 10Mpa high-pressure pump, the aqueous solution of the present invention for mass percent concentration 2 ~ 5% is injected in oil extraction in oil field stratum, under oil field stratum temperature 55 DEG C of conditions, chemical reaction is there is with calcium carbonate, carbonic acid magne-scale and ternary composite driving polymer material dirt etc., within 24 hours, complete oil field stratum cleaning de-plugging, after de-plugging, oil extraction in oil field rate reaches the designed capacity of producing well.
The neutral unblocking agent composition of oil extraction in oil field provided by the invention, effectively can solve the cleaning de-plugging of oil field stratum and the etching problem of oil production equipment, and unblocking agent and sandstone speed of response can be controlled, and generate mashed prod, improve the rate of permeation on stratum, prevent the pollution of formation, improve the recovery ratio of crude oil.Fast to oil field stratum de-plugging speed, neutral corrosion-free, can rapid solution various materials dirt, Pitch deposits dirty, carbonate scale, silicate scale and sulfate scale, the waste liquid of cleaning de-plugging has self-degradation, carries out sewage disposal without the need to the row of returning ground.Cleaning oil field stratum de-plugging, corrosion-free, without dead angle, do not produce and to precipitate and secondary blocks up well phenomenon, the de-plugging treatment time is no more than 24 hours, reaches corrosion-free safe de-plugging, than traditional pickling de-plugging, biological plugging releasing and solvent de-plugging safety and reliability.
main Function and the application mechanism of each component of the present invention are as described below:
1, copolymer of acrylic acid and methyl acrylate: be the copolymerization being participated in polyreaction by two or more monomers.Therefore, change molecular chain structure, improve the distribution situation of polymers function group, also have impact on its relative molecular weight distribution situation, copolymerization have also been introduced the functional group of different performance, this just compensate for the deficiency of single functional group self, Liang Zhong functional group is on same macromolecular chain, when playing functional performance, can maximize favourable factors and minimize unfavourable ones, common performance synergy, reaches the object of synergy.
2, second diene pentaacetic acid amine: be a kind of important amino complexing agent, very strong complexing action is had to calcium, magnesium, iron incrustation ion, especially strong especially to the complex ability of high volence metal ion, molten dirt is effective, during with complexometry descaling and blockage relieving, effect is better than EDETATE SODIUM salt and EDTA ammonium salt, can be miscible with all components in this unblocking agent, the component having complexing with other can play synergy, improves de-plugging speed and effect.
3, polyepoxy sodium succinate: the polyepoxy sodium succinate used in this unblocking agent, it is made up of the compound of five to six rings, can not cause environmental accumulation, polluted-water after de-plugging, biological degradability is good, is our complexing of metal ion agent by a large amount of molten dirty test and Selection.We prove through de-plugging research evaluation result: polyepoxy sodium succinate and metal ion generate complex compound, usually form multiple complexing ring.The more, the stability of complex compound is higher for number in a complex molecules, and the more, the complex compound that ligand and complexing of metal ion are formed is just more stable for the complexing ring formed when ligand and complexing of metal ion.Polyepoxy sodium succinate has multiple complexing ring, and can simultaneously with many metal ions as Ca
2+, Mg
2+, Fe
3+, Fe
2+, Ba
2+and Sr
2+plasma produces Complex effect, generate the stable complex compound with higher solubility, stop these particles to be combined with corresponding acid group, prevent precipitation, thus effectively prevent the secondary precipitate after the molten dirt of unblocking agent to block kapillary and the trunnion of oil field stratum.Simultaneously; polyepoxy sodium succinate also has good corrosion inhibition; Sauerstoffatom in its molecular polarity group; there is non-share electron pair; adsorption center adsorbing metal can be become and metal forms five-membered cyclic compound; and be adsorbed on metallic surface, form the protective membrane of one deck densification along metallic surface, thus play the effect of inhibition protection oil production equipment.
4, hydroxy-butanedioic acid amine: be a kind of complexing agent containing multiple hydroxyl and amido, complex compound soluble in water can be formed with calcium metal, magnesium, iron plasma, can be used for the various ferric oxide product removing metallic corrosion, can with other all components compatibilities of this unblocking agent, and there is good inhibition and perviousness, safety non-toxic.
5, sodium allyl sulfonate: the main constitutive material being intended for the unblocking agent of oil extraction in oil field pump, there is good preservative property, dispersiveness, static resistance and intermiscibility, and the throw out of cleaning process generation can be removed, safe and reliable, when effectively can eliminate de-plugging, molten dirt remains the phenomenon of bulk dirt, avoids the de-plugging accident of the deposition stuck oil well pump of secondary again because of large block dirt.
6, hydroxy ethylidene-diphosphate amine: be a kind of complexing agent, has good corrosion-mitigation scale-inhibition, can act on metallic surface formed and deposit protective membrane with divalent-metal ion; Corrosion inhibition rate reaches more than 95%, can react generate six-ring complex compound with the many kinds of metal ions in incrustation scale, especially can form complex compound soluble in water with calcium, magnesium ion.And can with this unblocking agent all components with the use of, there is synergistic effect, improve plugging removal effect.
7, hydro-polyacrylamide: pH value is aobvious neutral, soluble dispersion in water, facile hydrolysis, because hydrolysis degree is different, in macromolecular chain, the content of hydroxyl and amide group is also different, and the carboxyl-content that hydrolysis degree is larger is high, as effective during oil pump unblocking agent.
8, atlapulgite: be mainly used in refinery products (lubricating oil, paraffin, Vaseline).For the decolorizing and refining of various mineral oil, edible vegetable oil, animal oil, solid paraffin, lipid acid, ethanol and benzene etc. and gas, liquid dried dehydration.As catalyzer and the powder pesticide filler of chemical industry.Atlapulgite manufactures the carrier of pressed powder as clean-out system, complexing agent, permeate agent in this unblocking agent.
9, Sodium Persulfate: Sodium Persulfate is in a large number for the clean-out system of metal, etching and petroleum drilling, and borehole operation is just decomposed into free radical at normal temperatures, has strong oxidizing property, has Scavenging activity to calcium carbonate scale, carbonic acid magne-scale.For the polymer material dirt that ternary oil displacement system produces, there are good oxidative cleavage and solvency action.
10, sodium lignosulfonate: be a kind of aromatics forming complexity, there is the uneven anion layer of polymolecularity, degradable ionogen, non-secondary pollution, be a kind of promising green unblocking agent component, it contains hydroxyl, methoxyl group, aldehyde radical and carboxyl, because it is rich in many groups, so it can with the complexing of metal ion of indissoluble material, the inductive effect also by phenolic hydroxyl group makes the alpha-carbon atom of contraposition side chain activate, and strengthens its response capacity.Therefore, more phenolic hydroxyl group can be separated out on lignin molecule by chemical reaction, protect already present free phenolic hydroxyl group to avoid condensation as far as possible, lignin reaction's activity will be improved; Phenolic or non-phenolic lignin structure unit all have comparatively extensive chemical response capacity.
11, tannin: tannin belongs to polyhydric phenols, containing a large amount of hydroxyls and carboxyl, makes it have and Ca
2+, Mg
2+, Fe
2+and Fe
3+there is very strong complex ability, particularly with Ca
2+and Mg
2+complexing can become the complex compound that solubleness is very large, the precipitation at the particulate dirt end stoping unblocking agent to dissolve.Tannin also has corrosion inhibiting ability, and can form fine and close protective membrane at oil extraction pump and flow string metallic surface, protective membrane is the reticulated structure be made up of tannin molecule and ferric iron, containing α-Fe
2o
3structure.
12, hydroxy-butanedioic acid sodium: be a kind of complexing agent containing multiple hydroxyl and amido, complex compound soluble in water can be formed with calcium metal, magnesium, iron plasma, can be used for the various ferric oxide product removing metallic corrosion, can with other all components compatibilities of this unblocking agent, and there is good inhibition and perviousness, safety non-toxic.
13, amber acid ester sodium sulfonate: being the two fat sulfonate of a kind of succsinic acid, is excellent industry cleaning link wetting agent, permeate agent.It is the product that the monoester hydrocarbon sulfonation generated by fatty alcohol-polyoxyethylene ether and fatty monoethanol amide and maleic anhydride obtains.Because raw material sources are abundant, production cost is low, and result of use is good, does not produce the three wastes, belongs to environmental protection raw material.
14, starch: starch is that crude substance source is wide, cheap, pollution-free.Starch is shunk by much glucose to form, and it contains many hydroxyls, and these hydroxyls also have complexing action.In this unblocking agent, starch is used to the carrier adsorbing the tensio-active agent added, so that the product making solid powdery after liquid adsorption.
15, methyl lactate: be important aromatic series intermediate and Organic Chemicals, is used as medicine, agriculture intermediate, and can be used as solvent, clean-out system, permeate agent etc.It has good temperature expression range, can be compatible with water and organic system, readily biodegradable, that can replace most of Halogen with poisonous solvent.
16, Vanadium Pentoxide in FLAKES: Vanadium Pentoxide in FLAKES in this agent as catalyzer, in oil field stratum and oil well pipe laying, the deposition dirt of divalence sulfonate reacts with the polycarboxylic acid amine salt in this unblocking agent, under the effect of the catalyzer of Vanadium Pentoxide in FLAKES, generate the micromolecular compound that metal carboxylate is soluble in water.
17, diisobutyl carbinol(DIBC): be a kind of defoamer, there is the foaming eliminated rapidly oil field stratum de-plugging process and produce, its surface tension is lower, and easily absorption spreads on the liquid film of foam, sprawl when defoamer and be adsorbed in after on bubble film, the local surface tension of liquid film can be made to reduce, and under taking away liquid film, contiguous liquid causes thinning of liquid film and breaks simultaneously.This defoamer sprawl on liquid film very soon, very book, can froth breaking rapidly, no longer foam generated in de-plugging process.
Oil extraction in oil field provided by the invention neutral unblocking agent composition mechanism
:in recent years, along with developing rapidly of China's economy, problem of environmental pollution becomes increasingly conspicuous, and living environment quality progressively declines, and has even badly influenced the standard of living of the people, healthy and activity in production.In the face of this serious realistic problem, the present invention uses Green Chemistry Theory and technology, selects nontoxic development of raw materials green synthesis process and the production process of create environment friendly.Further, product of the present invention when oil field stratum de-plugging, to operator and oil field environment nontoxic.
1, neutral unblocking agent dissolves incrustation scale by ion compatibility
In oil extraction in oil field process, water flood recovery causes the factor of producing well and oil extraction pump fouling a lot, as long as but have HCO
3 -, CO
3 2-, SiO
3 2-, SO
4 -deng negatively charged ion, and C
a 2+, M
g 2+, B
a 2+, S
r 2+etc. cationic existence, just likely form C
acO
3, M
gcO
3, C
asiO
3, M
gsiO
3, C
asO
4, M
gsO
4, B
asO
4, S
rsO
4etc. precipitation.Internal cause is the basis of change, and external causes are the conditions for change, and thus external cause is worked by interior.And the change of the physical chemical factors such as temperature, pressure, pH value is external cause, if the positively charged ion of dirt and negatively charged ion complexometry can be generated water miscible complex compound, or the positively charged ion of dirt and negatively charged ion are become water-soluble compound by ion compatibility, just solve the de-plugging problem of oil field stratum and producing well.
The complexing ring formed when compatibility body and complexing of metal ion is more, compatibility body and complexing of metal ion quantity more, in system, the increase of entropy is more, and Complex effect is more remarkable, and the stability of complex compound is also higher.And the complex compound that stability is higher, cleaning and descaling de-plugging performance is better.Such as, polyepoxy sodium succinate component in this agent has multiple complexing ring, and can produce Complex effect with many divalent-metal ions simultaneously, generates the stable complex compound with higher solubility, thus reaches the object of de-plugging.
2, complexing descaling and blockage relieving mechanism
Negatively charged ion in the neutral unblocking agent of oil extraction in oil field, amine ion isoreactivity group and carbonate scale, silicate scale, sulfate scale react and generate mashed prod, by complexing of metal ion, become aqua complex soluble in water, thus play de-plugging effect.This kind of complex reaction is not stoichiometrically carried out, but carries out according to chemical molecular ratio, usually the every complexing unblocking agent of several grams to tens grams, and the salt that just can dissolve the metal ions such as a few hectogram calcium, magnesium is dirty.That is, even if when unblocking agent consumption is very low, also can with a large amount of complexing of metal ion, this effect is called low dose effect.
3, the impact of complex structure
The structures and characteristics of complex compound determines the size of complexing ring in formed complex compound, quantity and sterically hindered (mainly referring to some atom in molecule or the closer to each other and steric restriction effect that causes of group) etc., and these factors are very large to the stability influence of complexing agent.Prove through lot of experiments, the stability with the compound of five to six rings is the highest, wherein, has pentacyclic Stability of Metal Complexes the highest.And when there being double bond in complexing ring, the complex compound of six-ring is the most stable.There is the C in the polyepoxy sodium succinate of certain polymerization degree and dirt
a 2+, M
g 2+, F
e 2+, F
e 3+the complex compound formed Deng complexing of metal ion has five-ring or six-membered ring structure.Complexing number of rings amount in a complex molecules is more, and the stability of complex compound is higher.When polyepoxy sodium succinate and metal ion generate complex compound, usually form multiple complexing ring, therefore, this complex compound is highly stable, and complexing plugging removal effect is better.
4, dissemination is dissolved
Macromolecular complex thing in this unblocking agent has dissolving and dissemination, the surface that these charged macromole components are adsorbed on dirt forms electrostatic double layer, the profile of dirt " parcel " is got up, change the charge condition that dirt surface is original, increase the electrostatic repulsion between particle, avoid the secondary deposition dissolving dirt, make the dispersion state that stably can be in mashed prod by the dirt cleaning dissolving, with water flow, thus avoid the hole and the venturi that precipitate dirty slag blocking oil field stratum.
5, to the descaling and blockage relieving mechanism of ternary composite driving dirt
In order to improve oil extraction in oil field rate, promote the application of alkaline surfactant polymer flooding oil-field technology, in ternary composite driving, owing to containing alkali, tensio-active agent and polyacrylamide in formula, make the injection and extraction system of combination flooding produce fouling, cause the hole of oil field stratum and the blocking of trunnion.This is mainly because alkali is with the high valence ion reaction in rock and local water, and in suitable pressure, temperature, ion forms and under pH condition, deposition generates inorganic salt crust.The dirt formed in ternary composite driving mainly contains: calcium carbonate, magnesiumcarbonate, calcium hydroxide, magnesium hydroxide, Calucium Silicate powder, Magnesium Silicate q-agent etc., also have the sulfate scale etc. of barium and strontium sometimes.Simultaneously, due to sulfonated petro-leum conventional in ternary composite driving, in the high-valence cationic aqueous solution, precipitation generates the polymer material dirt of divalence sulfonic acid salt crust and polyacrylamide generation, these organic materials dirts condense together and define gluey organic deposition, seriously block formation pore, cause oil flow resistance large, even passage is blocked, significantly limit gathering of crude oil.This unblocking agent utilizes " polarity is close to mix " principle, with polar group-OH ,-CONH
2,-ON
awith the multiple complex compound containing strong polar group and tensio-active agent.As the copolymer of acrylic acid and methyl acrylate in this agent, second diene pentaacetic acid amine, hydroxy-butanedioic acid amine, sodium allyl sulfonate, hydroxy ethylidene-diphosphate amine and Sodium Persulfate and various tensio-active agent, dissolve under the effect of complexing, dispersion, under free from corrosion cleaning and descaling working condition, complete the dissolving of the inorganic salt crust of oil field stratum, become complex compound hydration salt soluble in water.For organic materials dirt, be then oxidized, chain rupture, coordination, conversion, finally generate small molecule solution soluble in water, to reach the object of oil field stratum de-plugging.
6, this unblocking agent is on the impact of environment and Study on compatibility thereof
Along with the high development of industry, the environmental pollution of global property and ecological damage are day by day serious, and protection of the environment is very urgent.As the unblocking agent of specialty chemicals, its development strategy requires consistent with the Green Chemistry of environmental requirement.The general thought of the unblocking agent research of oil field chemical is that fundamentally de-plugging, eliminates source of pollution, and makes in de-plugging waste liquid no longer containing pollutent.Therefore, the chemical composition of this unblocking agent should ensure that each component is all efficient to greatest extent, and make other components produce synergy as much as possible, to reach, consumption is few, scale removal thorough, efficient de-plugging, and to the liquid after oil field stratum de-plugging without the need to the row's of returning floor treatment, environmentally safe.
Details are as follows for the beneficial effect of the neutral unblocking agent composition of oil extraction in oil field provided by the invention:
1, neutral unblocking agent completes oil field stratum de-plugging by single stage method
This neutral unblocking agent is made up of copolymer of acrylic acid and methyl acrylate, second diene pentaacetic acid amine, polyepoxy sodium succinate, hydroxy-butanedioic acid amine, sodium allyl sulfonate, hydroxy ethylidene-diphosphate amine, hydro-polyacrylamide, Sodium Persulfate, atlapulgite, sodium lignosulfonate, tannin, hydroxy-butanedioic acid sodium, amber acid ester sodium sulfonate and kinds of surface promoting agent, the pH of unblocking agent is 6 ~ 7, not containing harmful ions such as mineral acid, organic acid, chlorion and sulfate radicals, corrosion rate is less than 0.1g (m
2h), corrosion-free safe de-plugging can be reached.In oil field stratum de-plugging process, use this neutral unblocking agent, under normal temperature to 100 DEG C condition, the chemical cleaning de-plugging to all kinds of incrustation scale can be completed by single stage method, without the need to neutralizing treatment and Passivation Treatment, improve de-plugging efficiency.
2, polymer material dirt and the bituminous matter of removing stratum ternary composite driving generation are dirty
The compound scale that this agent generates precipitations such as the divalence sulfonated petro-leum precipitation dirt, polyacrylamide polymers material dirt and the Ferric oxide scale that are produced by tensio-active agent in ternary compound oil drive system oil recovery process, in 24 hours, under free from corrosion cleaning working condition, complete the chemically neutral descaling and blockage relieving of oil field stratum.The tamper of this agent energy rapid solution oil field stratum studies on asphaltene dirt, the permeate agent etc. of interpolation is made to be with the inside of organic polymer material dirt rapidly, unblocking agent is contacted rapidly with organic polymer material dirt, make bituminous matter dirt and polymer material dirt expand, transform, finally formed soluble in the small molecule solution of water.
3, protection stratum support and kapillary can safe de-pluggings
This neutral unblocking agent is to dredge pore constriction, to recover for the purpose of reservoir permeability; the cleaning de-plugging dirty to carbonate scale, silicate scale, sulfate scale and tensio-active agent and polymer material is dirty; there is good complexing, perviousness and lyotropy; can penetrate into the deep of oil field stratum, de-plugging area is large, and reaction residue becomes pasty state; do not produce dirty slag and secondary precipitate etc.; make reservoir exempt from acid infringement, have reaming effect to kapillary, protection stratum support.This unblocking agent can solve hydrochloric acid and hydrofluoric acid speed of response is too fast, solution cavity is large and short, and not easily go deep into stratum and the cleaning problems such as operating range is short, the extraction for reservoir fluid forms good passage, reduce additional capillary pressure, improve relative permeability and the tar productivity of oil.
4, the waste liquid that de-plugging process produces easily is degraded, without the need to the row's of returning floor treatment
Because all components of this unblocking agent is all made up of raw materials such as the complexing agent of easily degrading, emulsifying agent, dispersion agent and oxygenants, with the dirt generation chemical reaction cleaned in oil field stratum, generate the small molecules salt of easily degraded, oilbearing stratum can be reached to the oil recovery quality of water quality and environmental requirement.Use this unblocking agent to after oil field stratum chemical plugging removal, oil field stratum cleans the waste liquid of de-plugging without the need to the row's of returning process earthward, liquid waste disposal operation and expense after saving cleaning de-plugging.
Embodiment
Embodiment 1, takes raw material by following component and weight: copolymer of acrylic acid and methyl acrylate 30kg, second diene pentaacetic acid amine 48kg, polyepoxy sodium succinate 32kg, hydroxy-butanedioic acid amine 30kg, sodium allyl sulfonate 11kg, hydroxy ethylidene-diphosphate amine 7kg, hydro-polyacrylamide 14kg, atlapulgite 16kg, Sodium Persulfate 22kg, sodium lignosulfonate 8kg, tannin 7kg, hydroxy-butanedioic acid sodium 15kg, amber acid ester sodium sulfonate 7kg, starch 7kg, methyl lactate 11kg, Vanadium Pentoxide in FLAKES 0.3kg and diisobutyl carbinol(DIBC) 0.2kg.
Above-mentioned raw materials is prepared into by the following method the neutral unblocking agent composition of oil extraction in oil field:
1, by copolymer of acrylic acid and methyl acrylate, second diene pentaacetic acid amine, polyepoxy sodium succinate, hydroxy-butanedioic acid amine, sodium allyl sulfonate, hydroxy ethylidene-diphosphate amine, hydro-polyacrylamide and atlapulgite 13kg, fragmentation is carried out with shredder, stir 40 minutes after crossing 20 mesh sieves to evenly, obtain the first powder; First powder is as the main component of unblocking agent in oil extraction in oil field;
2, by Sodium Persulfate, sodium lignosulfonate, tannin, hydroxy-butanedioic acid sodium and amber acid ester sodium sulfonate, with cone blender mix and blend 40 minutes to evenly, obtained second powder of 20 mesh sieves is crossed; Second powder is as the solvay-type supporting surfactant of unblocking agent in oil extraction in oil field;
3, by Vanadium Pentoxide in FLAKES and atlapulgite 3kg, stir 40 minutes to evenly, Vanadium Pentoxide in FLAKES and atlapulgite carrier are fully adsorbed with cone blender, cross obtained 3rd powder of 40 mesh sieves, the 3rd powder is as the catalyzer of unblocking agent in oil extraction in oil field;
4, by starch, methyl lactate and diisobutyl carbinol(DIBC), stir 40 minutes with tapered mixing and blending machine, cross obtained 4th powder of 20 mesh sieves, the 4th powder is as taking starch as the solid cleaning permeate agent that carrier is made;
5, by the mixing of obtained the first powder, the second powder, the 3rd powder and the 4th powder, stir and namely make the neutral unblocking agent of oil extraction in oil field.
Embodiment 2, takes raw material by following component and weight: copolymer of acrylic acid and methyl acrylate 35kg, second diene pentaacetic acid amine 46kg, polyepoxy sodium succinate 30kg, hydroxy-butanedioic acid amine 35kg, sodium allyl sulfonate 14kg, hydroxy ethylidene-diphosphate amine 8kg, hydro-polyacrylamide 11kg, atlapulgite 12kg, Sodium Persulfate 22kg, sodium lignosulfonate 7kg, tannin 6kg, hydroxy-butanedioic acid sodium 12kg, amber acid ester sodium sulfonate 5kg, starch 8kg, methyl lactate 10kg, Vanadium Pentoxide in FLAKES 0.2kg and diisobutyl carbinol(DIBC) 0.1kg.
Above-mentioned raw materials is prepared into by the following method the neutral unblocking agent composition of oil extraction in oil field:
1, by copolymer of acrylic acid and methyl acrylate, second diene pentaacetic acid amine, polyepoxy sodium succinate, hydroxy-butanedioic acid amine, sodium allyl sulfonate, hydroxy ethylidene-diphosphate amine, hydro-polyacrylamide and atlapulgite 10kg, fragmentation is carried out, remaining same embodiment 1 with shredder;
2, with embodiment 1;
3, by Vanadium Pentoxide in FLAKES and atlapulgite 2kg, 40 minutes are stirred to even with cone blender, remaining same embodiment 1;
4, with embodiment 1;
5, with embodiment 1.
Embodiment 3, takes raw material by following component and weight: copolymer of acrylic acid and methyl acrylate 33kg, second diene pentaacetic acid amine 44kg, polyepoxy sodium succinate 35kg, hydroxy-butanedioic acid amine 32kg, sodium allyl sulfonate 10kg, hydroxy ethylidene-diphosphate amine 6kg, hydro-polyacrylamide 12kg, atlapulgite 14kg, Sodium Persulfate 25kg, sodium lignosulfonate 10kg, tannin 8kg, hydroxy-butanedioic acid sodium 14kg, amber acid ester sodium sulfonate 6kg, starch 5kg, methyl lactate 12kg, Vanadium Pentoxide in FLAKES 0.25kg and diisobutyl carbinol(DIBC) 0.3kg.
Above-mentioned raw materials is prepared into by the following method the neutral unblocking agent composition of oil extraction in oil field:
1, by copolymer of acrylic acid and methyl acrylate, second diene pentaacetic acid amine, polyepoxy sodium succinate, hydroxy-butanedioic acid amine, sodium allyl sulfonate, hydroxy ethylidene-diphosphate amine, hydro-polyacrylamide and atlapulgite 12kg, fragmentation is carried out, remaining same embodiment 1 with shredder;
2, with embodiment 1;
3, by Vanadium Pentoxide in FLAKES and atlapulgite 2kg, 40 minutes are stirred to even with cone blender, remaining same embodiment 1;
4, with embodiment 1;
5, with embodiment 1.
Embodiment 4, takes raw material by following component and weight: copolymer of acrylic acid and methyl acrylate 32kg, second diene pentaacetic acid amine 46kg, polyepoxy sodium succinate 31kg, hydroxy-butanedioic acid amine 30kg, sodium allyl sulfonate 12kg, hydroxy ethylidene-diphosphate amine 5kg, hydro-polyacrylamide 10kg, atlapulgite 15kg, Sodium Persulfate 20kg, sodium lignosulfonate 9kg, tannin 5kg, hydroxy-butanedioic acid sodium 16kg, amber acid ester sodium sulfonate 6kg, starch 6kg, methyl lactate 9kg, Vanadium Pentoxide in FLAKES 0.25kg and diisobutyl carbinol(DIBC) 0.25kg.
Above-mentioned raw materials is prepared into by the following method the neutral unblocking agent composition of oil extraction in oil field:
1, by copolymer of acrylic acid and methyl acrylate, second diene pentaacetic acid amine, polyepoxy sodium succinate, hydroxy-butanedioic acid amine, sodium allyl sulfonate, hydroxy ethylidene-diphosphate amine, hydro-polyacrylamide and atlapulgite 13kg, fragmentation is carried out, remaining same embodiment 1 with shredder;
2, with embodiment 1;
3, by Vanadium Pentoxide in FLAKES and atlapulgite 2kg, 40 minutes are stirred to even with cone blender, remaining same embodiment 1;
4, with embodiment 1;
5, with embodiment 1.
Embodiment 5, takes raw material by following component and weight: copolymer of acrylic acid and methyl acrylate 32kg, second diene pentaacetic acid amine 50kg, polyepoxy sodium succinate 34kg, hydroxy-butanedioic acid amine 31kg, sodium allyl sulfonate 11kg, hydroxy ethylidene-diphosphate amine 6kg, hydro-polyacrylamide 12kg, atlapulgite 17kg, Sodium Persulfate 22kg, sodium lignosulfonate 7kg, tannin 6kg, hydroxy-butanedioic acid sodium 13kg, amber acid ester sodium sulfonate 8kg, starch 8kg, methyl lactate 9kg, Vanadium Pentoxide in FLAKES 0.2kg and diisobutyl carbinol(DIBC) 0.3kg.
Above-mentioned raw materials is prepared into by the following method the neutral unblocking agent composition of oil extraction in oil field:
1, by copolymer of acrylic acid and methyl acrylate, second diene pentaacetic acid amine, polyepoxy sodium succinate, hydroxy-butanedioic acid amine, sodium allyl sulfonate, hydroxy ethylidene-diphosphate amine, hydro-polyacrylamide and atlapulgite 14kg, fragmentation is carried out, remaining same embodiment 1 with shredder;
2, with embodiment 1;
3, by Vanadium Pentoxide in FLAKES and atlapulgite 3kg, 40 minutes are stirred to even with cone blender, remaining same embodiment 1;
4, with embodiment 1;
5, with embodiment 1.
Claims (2)
1. the neutral unblocking agent composition of oil extraction in oil field, it is characterized in that it is made up of following component and parts by weight: copolymer of acrylic acid and methyl acrylate 30 ~ 35 parts, second diene pentaacetic acid amine 44 ~ 50 parts, polyepoxy sodium succinate 30 ~ 35 parts, hydroxy-butanedioic acid amine 30 ~ 35 parts, sodium allyl sulfonate 10 ~ 14 parts, hydroxy ethylidene-diphosphate amine 5 ~ 8 parts, hydro-polyacrylamide 10 ~ 14 parts, atlapulgite 12 ~ 17 parts, Sodium Persulfate 20 ~ 25 parts, sodium lignosulfonate 7 ~ 10 parts, tannin 5 ~ 8 parts, 12 ~ 16 parts, hydroxy-butanedioic acid sodium, amber acid ester sodium sulfonate 5 ~ 8 parts, starch 5 ~ 8 parts, methyl lactate 9 ~ 12 parts, Vanadium Pentoxide in FLAKES 0.2 ~ 0.3 part and diisobutyl carbinol(DIBC) 0.1 ~ 0.3 part.
2. the method for the neutral unblocking agent composition of preparation oil extraction in oil field according to claim 1, is characterized in that comprising the steps:
A, by copolymer of acrylic acid and methyl acrylate 30 ~ 35 parts, second diene pentaacetic acid amine 44 ~ 50 parts, polyepoxy sodium succinate 30 ~ 35 parts, hydroxy-butanedioic acid amine 30 ~ 35 parts, sodium allyl sulfonate 10 ~ 14 parts, hydroxy ethylidene-diphosphate amine 5 ~ 8 parts, hydro-polyacrylamide 10 ~ 14 parts and atlapulgite 10 ~ 14 parts, fragmentation is carried out with shredder, stir 40 minutes after crossing 20 mesh sieves to evenly, obtain the first powder;
B, by Sodium Persulfate 20 ~ 25 parts, sodium lignosulfonate 7 ~ 10 parts, tannin 5 ~ 8 parts, 12 ~ 16 parts, hydroxy-butanedioic acid sodium and amber acid ester sodium sulfonate 5 ~ 8 parts, with cone blender mix and blend 40 minutes to evenly, cross obtained second powder of 20 mesh sieves;
C, by Vanadium Pentoxide in FLAKES 0.2 ~ 0.3 part and atlapulgite 2 ~ 3 parts, stir 40 minutes to evenly with cone blender, Vanadium Pentoxide in FLAKES and atlapulgite carrier are fully adsorbed, cross 40 mesh sieves and obtain the 3rd powder;
D, by starch 5 ~ 8 parts, methyl lactate 9 ~ 12 parts and diisobutyl carbinol(DIBC) 0.1 ~ 0.3 part, stir 40 minutes with tapered mixing and blending machine, cross obtained 4th powder of 20 mesh sieves;
E, the first powder, the second powder, the 3rd powder and the 4th powder mixing that will obtain, stir and namely make the neutral unblocking agent of oil extraction in oil field.
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