CN104673268A - Neutral fracturing fluid composition in oil extraction floor layer of oil field and preparation method of neutral fracturing fluid composition - Google Patents
Neutral fracturing fluid composition in oil extraction floor layer of oil field and preparation method of neutral fracturing fluid composition Download PDFInfo
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Abstract
The invention discloses a neutral fracturing fluid composition in an oil extraction floor layer of an oil field. The neutral fracturing fluid composition is prepared from the following raw materials in parts by weight: 37-44 parts of polyepoxysuccinic amide, 15-21 parts of butylbenzylaminoethyl imidazoline chlorinated quaternary ammonium salt, 1-3 parts of imidazoline sodium phosphate, 16-21 parts of nonyl phenoloxy vinyl ether-n, 9-14 parts of a copolymer of methacrylic acid and methylacrylic aminoalkyl ester, 12-17 parts of potassium perfluorooctoate, 0.1-0.3 part of diethyl ethanol, 10-14 parts of carboxymethyl galactomannan, 20-28 parts of carboxymethyl hydroxypropyl galactomannan, 11-15 parts of 2,2-diethyl dodecyl amine, 14-20 parts of sodium dodecyl benzene sulfonate and 155-165 parts of water. The neutral fracturing fluid composition disclosed by the invention is high in deblocking speed, neutral, free of corrosion and capable of being used for rapidly dissolving material scales, asphalt sediment scales, carbonate scales and the like generated by a ternary composite precursor system; the neutral fracturing fluid composition deblocking waste liquid can be self-degraded; the fracturing deblocking time is not longer than 24 hours; no corrosion is caused; no dead corner is generated; precipitates are not generated; secondary blocking of the floor layer and an oil extraction well are avoided.
Description
Technical field
The present invention relates to a kind of oil field stratum pressure break and use the fracturing liquid substituting acidifying, particularly the neutral fracturing fluid compositions in a kind of oil extraction in oil field stratum, the invention still further relates to the preparation method of the neutral fracturing fluid compositions in oil extraction in oil field stratum.
Background technology
Many oil fields both domestic and external in water flooding recovery all to some extent by fouling injure perplex, especially enter stage intermediary and later stages in exploitation, along with the increase of Water Content in Oil amount, scale problems becomes more general and serious.Because oil-field water fouling causes reservoir injury, stratum kapillary and throat blocked, substantially increase cost for oil production, have a strong impact on the normal production of oil gas.In order to solve the scale problems of oil field stratum better, the fouling solved in oilfield water extraction injures this technical barrier, needs to use a kind of safe pressure break blockages relieving fluid product.
Oil is the strategic goods and materials being related to China's economic lifeline, in China, middle and high infiltration oil reservoir development Steady product technique is relatively ripe, but how old well continuously steady production is realized for low permeability and ultra-low permeability reservoirs, and obtain higher ultimate recovery factor and economic benefit, be a major challenge that domestic many oil fields face.Therefore, how to improve tertiary oil recovery technology level, increase the recovery ratio of existing oil reservoir, adopt pressure break de-plugging to have important economic worth and strategic importance.Along with the use of oil extraction in oil field three-component compound system, gathering of alkali consumption, serious injury is had to the skeleton of reservoir rock and cementing matter, also the injury to oil reservoir is caused, reduce reservoir permeability, injection pressure declines, oil and water well fouling is serious, to sulfonated petro-leum conventional in tertiary oil recovery, impact to a certain degree and injury is had on the precipitation etc. occurred in multivalent cation aqueous solution, therefore, to producing formation and the producing well of application three-component compound system, need to use pressure break de-plugging scale removal product to carry out eliminate the harmful effect, become the major measure that output is improved in oil field.
At present, oil field mainly adopts fracture acidizing de-plugging, fracture acidizing de-plugging is by means of mineral acid (hydrochloric acid, hydrofluoric acid, also useful sulfuric acid), also the chemical corrosion of organic acid (formic acid, acetic acid etc.) formation rock, tamper can be used, and the hydraulic action of fracture acidizing pressure, improve stratum permeability, realize the engineering measure of oil well production increasing, intensified injection of wells.In order to complete fracture acidizing engineering objective, in fracture acidizing liquid except host strong acid, also need to add inhibiter, Fe stabilizer etc.The hydrochloric acid that fracture acidizing is used and mud acid are strong acid, especially the reaction of hydrochloric acid and carbonate is exceedingly fast, easily cause the excessive acidifying in stratum at nearly well position, and deep-section can not get abundant acidifying, the high temperature deep well impact of this phenomenon on low permeability formation is larger, is the major cause causing fracture acidizing effect failure.In fracture acidizing process, fracture acidizing inhibiter is subject to the impact of formation temperature, pressure and iron ion and lost efficacy, once fracture acidizing inhibiter lost efficacy, will cause the heavy corrosion of producing well, oil well pump and oil transporting appliance, therefore fracture acidizing de-plugging also existed potential great risk.
Prior art acidifying hydrochloric acid and hydrofluoric acid and formation rock ore deposit are reacted acutely, it is fast to consume, and solution cavity is large and pressure break de-plugging operating range is short, and pressure break de-plugging area is little and thorough, is difficult to the object reaching deep acidification, affects acidizing effect.
The neutral fracturing liquid in oil field of the present invention can reach the object of deep pressure break de-plugging, neutral fracturing liquid motion is carried out with certain speed, the neutral fracturing liquid of q.s is made to enter oil reservoir depth position, open deep oil flow channel, extraction for reservoir fluid forms good passage, reduce additional capillary pressure, improve the relative permeability of crude oil, and improve tar productivity.
4, neutral fracturing liquid de-plugging waste liquid is easily degraded, need not the row's of returning floor treatment
Because the neutral of the fracturing fluid all components of the present invention is all made up of the complexing agent of easily degrading, emulsifying agent, dispersion agent and oxygenant, react with the dirt cleaned in oil field stratum, generate the small molecules salt of easily degraded, oilbearing stratum can be reached to the quality of water quality and environmental requirement.With this neutral fracturing liquid to after the pressure break de-plugging of oil field stratum chemistry, the waste liquid of oil field stratum cleaning pressure break de-plugging need not the row of returning earthward, and after saving pressure break de-plugging, waste liquid returns row's floor treatment expense, decreases the row's of returning treatment process, reduces the pollution to environment.
Summary of the invention
The object of the present invention is to provide the neutral fracturing fluid compositions in fast, the free from corrosion oil extraction in oil field stratum of a kind of pressure break de-plugging speed; The material dirt that this fracturing liquid energy rapid solution ternary composite displacement system produces, Pitch deposits are dirty, carbonate scale, silicate scale and sulfate scale.The second object of the present invention is the preparation method providing the neutral fracturing fluid compositions in oil extraction in oil field stratum.
Realize the technical scheme that the object of the invention takes as follows: the neutral fracturing fluid compositions in a kind of oil extraction in oil field stratum, be made up of the raw material of following portions by weight: poly-epoxy succinic acid amine 37 ~ 44 parts, Ding Ji Benzyl base amine ethyl imidazol(e) quinoline quaternary ammonium chloride 15 ~ 21 parts, 1 ~ 3 part, tetrahydroglyoxaline phosphoric acid ester sodium, nonyl phenol oxygen Vinyl Ether-n 16 ~ 21 parts, the multipolymer of methacrylic acid and methacrylic acid aminoalkyl fat 9 ~ 14 parts, Potassium perfluorooctanoate 12 ~ 17 parts, diethylaluminum ethoxide 0.1 ~ 0.3 part, carboxymethyl polygalactomannan 10 ~ 14 parts, carboxymethyl carboxylic propyl group polygalactomannan 20 ~ 28 parts, 2, 2 diethyldodecylamine 11 ~ 15 parts, Sodium dodecylbenzene sulfonate 14 ~ 20 parts and 155 ~ 165 parts, water.
A preparation method for the neutral fracturing fluid compositions in oil extraction in oil field stratum, comprises the steps:
(1), the multipolymer 9 ~ 14 parts of poly-epoxy succinic acid amine 37 ~ 44 parts, Ding Ji Benzyl base amine ethyl imidazol(e) quinoline quaternary ammonium chloride 15 ~ 21 parts, 1 ~ 3 part, tetrahydroglyoxaline phosphoric acid ester sodium, nonyl phenol oxygen Vinyl Ether-n 16 ~ 21 parts, methacrylic acid and methacrylic acid aminoalkyl fat, Potassium perfluorooctanoate 12 ~ 17 parts, diethylaluminum ethoxide 0.1 ~ 0.3 part and 155 ~ 165 parts, water add in reactor, mix and blend obtains liquid to evenly in 30 minutes; This liquid is as the main component of neutral fracturing fluid compositions;
(2), carboxymethyl polygalactomannan 10 ~ 14 parts, carboxymethyl carboxylic propyl group polygalactomannan 20 ~ 28 parts add in cone blender, stirs 30 minutes to evenly, cross obtained first powder of 20 mesh sieves; First powder is as the viscosifying agent of neutral fracturing fluid compositions;
(3), 2,2 diethyldodecylamine 11 ~ 15 parts, Sodium dodecylbenzene sulfonate 14 ~ 20 parts add in tapered mixing and blending machine, stirs 30 minutes to evenly, cross obtained second powder of 20 mesh sieves; Second powder is as the Surfactant Used in Viscoelastic Fracturing Fluids of neutral fracturing fluid compositions;
(4), in the preparation of step (1) have gradation in the reactor of liquid to add the first powder and the second powder, namely mix and blend makes the neutral fracturing fluid compositions in oil extraction in oil field stratum to evenly in 40 minutes.
The neutral fracturing fluid compositions in oil extraction in oil field stratum provided by the invention, its outward appearance is colourless or slight yellowish liquid, and density is 1.07 ~ 1.17g/cm
3, pH is 6 ~ 7, during the neutrality fracturing liquid de-plugging of oil extraction in oil field stratum, is mixed with the aqueous solution of mass percent concentration 2% ~ 5%, in 24 hours, just can completes pressure break de-plugging according to oil field stratum dirt chocking-up degree water.
The present invention is not containing mineral acid and organic acid, and also not containing harmful ions such as hydrogen ion, chlorion and sulfate radicals, corrosion rate is less than 0.1g/ (m
2h), the safe de-plugging of corrosion-free pressure break is reached.
The neutral fracturing liquid in oil extraction in oil field stratum provided by the invention, use the method for infiltration, solubilising, oxidation, chain rupture and conversion, various types of dirts and this fracturing liquid generation chemical reaction in stratum is made to be converted into water soluble salt, after adopting fracturing liquid de-plugging of the present invention, carbonate scale, silicate scale and sulfate scale that calcium, magnesium metal ion are produced dissolve in fracturing liquid.Neutral of the fracturing fluid active group, can be converted into water-soluble cpds by carbonate scale and sulfate scale.For using at oil recovery process, the divalence sulfonated petro-leum throw out produced in alkaline surfactant polymer flooding oil-field is dirty and polyacrylamide polymers material is dirty and iron oxide precipitation is dirty, with reactions such as the polycarboxylic acid amine salt in this fracturing liquid, generate solubility micromolecular compound, and there is degradation property, bituminous matter dirt in oil field stratum and the-OH in other polymer scales and this agent component, there is molten dirty synergistic effect in the groups such as-ONa, reaction chain rupture generates molecular weight polymers soluble in water, polymer material dirt and bituminous matter dirt is removed to reach, realize the object to the neutral pressure break de-plugging of oil field stratum.
The neutral fracturing fluid compositions non-corrosiveness of the present invention, block up for the lamination cracking of wash oil field, single stage method can complete the pressure break de-plugging of oil field stratum, the material dirt that energy rapid solution ternary composite displacement system produces, Pitch deposits dirt, carbonate scale, silicate scale and sulfate scale, cleaning that of the fracturing fluid waste liquid has can self-degradation, need not fracturing liquid wastewater treatment be carried out in the row of returning ground, have corrosion-free, without dead angle, do not produce the advantages such as precipitation and secondary precipitate particles holography stratum capillary phenomenon, the neutral fracture treatment time is no more than 24 hours, reach corrosion-free safe pressure break de-plugging, than traditional acid fracturing de-plugging safety and reliability.
The present invention is also applicable in oil extraction in oil field process, can solve the pressure break de-plugging of oil field stratum and the etching problem of oil production equipment, effective control fracturing liquid and sandstone speed of response, and generate mashed prod, improve the rate of permeation on stratum, prevent formation from polluting, improve oil recovery factor.
main Function and the application mechanism of each component of the present invention are as described below:
1, poly-epoxy succinic acid amine: the poly-epoxy succinic acid amine used as the of the fracturing fluid main component of neutrality, it is made up of the compound of five to six rings, environmental accumulation can not be caused after pressure break de-plugging, can not polluted-water, 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: poly-epoxy succinic acid amine 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.Poly-epoxy succinic acid amine 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.And; poly-epoxy succinic acid amine also has good corrosion inhibition; Sauerstoffatom in its molecular polarity group; there is non-share electron pair; adsorption center adsorbing metal can be become, form five-membered cyclic compound with metal, and be adsorbed in metallic surface; form the protective membrane of one deck densification along metallic surface, thus play the effect of inhibition protection oil production equipment.
2, Ding Ji Benzyl base amine ethyl imidazol(e) quinoline quaternary ammonium chloride, tetrahydroglyoxaline phosphoric acid ester sodium: both are combined as compound corrosion inhibitor, mineral ion in they and neutral fracturing liquid and anion surfactant have synergy, composite use corrosion mitigating effect is best, increasing amount is little, under identical corrosion mitigating effect, composite corrosion inhibitor significantly reduces the increasing amount of host, reduces cost.Two kinds of inhibiter all can suppress corrosion reaction anode and cathode to be reacted, and have good corrosion mitigating effect.Research shows, after adding single inhibiter, larger skew does not occur the corrosion potential of system, belongs to mixture control type inhibiter; After adding composite corrosion inhibitor, the corrosion potential of system shows slightly negative and moves, and anode and cathode current concentration all shows slightly reduction, belongs to mixing cathode depolarizer type inhibiter.
3, nonyl phenol oxygen Vinyl Ether-n: be nonionic surface active agent, be called as " green " tensio-active agent, it is high in water base stability, not easily affect by electrolytical, also the impact of acid and alkali alkali, and good with the other types promoting agent intermiscibility added in product of the present invention, in neutral fracturing liquid, there is good solvability, and have the amphiphilic structure of hydrophilic group (hydroxyl-OH, ether chain-O-, polyoxyethylene chain etc.) and oleophilic group (hydrocarbon chain R, polyoxyethylene chain etc.).
4, the multipolymer of methacrylic acid and methacrylic acid aminoalkyl fat: be polymeric surface active agent, its relative molecular weight up to several thousand, several ten thousand, millions of, and there is good surfactivity, emulsifying power is good, dispersion force is excellent, and have and increase stickiness, flocculation, dispersion, emulsifying property preferably, and belong to hypotoxic environment-friendly materials.
5, Potassium perfluorooctanoate: the pollutent silicate of Potassium perfluorooctanoate formation and vitriol dirt, have good solubility property, high, anti-oxidant, the resistance to strong acid of its most excellent feature thermostability, highly basic, high temperature; Intermolecular mutual attractive force is little, i.e. hydrophobic but also oleophobic, and surfactivity is high.
6, diethylaluminum ethoxide: be a kind of defoamer, there is the foaming eliminated rapidly oil field stratum pressure break 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; Its sprawl on liquid film very soon, very book, can froth breaking rapidly, again can in unfreezing process no longer foam generated.
7, carboxymethyl polygalactomannan, carboxymethyl carboxylic propyl group polygalactomannan: both are soluble in water is mixed with viscosifying agent, can utilize this two kinds of viscosifying agents are composite and form, synergistic effect can be produced, to reduce the consumption of viscosifying agent, thickening ability is than under identical fracturing technology condition, when both mass fractions are the blending ratio of 1:2, stronger than the thickening ability added when arbitrary viscosifying agent uses merely.
8,2,2 diethyldodecylamine, Sodium dodecylbenzene sulfonate: both mixed solutions are as the component of glutinous bullet micelle fracturing fluid.When 2, when the mass fraction of 2 diethyldodecylamine and Sodium dodecylbenzene sulfonate is 1:1.3, the chain-like structure that the covalent linkage of polymericular weight couples together, good bending chain micella could be formed, the supramolecular structure that during this chain micellar surfactant, small molecules couples together by intermolecular interaction, it can be given neutral fracturing fluid system and have visco-elastic property.
The present invention, from eco-friendly viewpoint, utilizes modern science and technology principle, adopts HUMAN HEALTH, the harmless new raw material of ecotope, new reaction, new process and novel method, realizes the aim that product of the present invention and Ecological harmony develop.The present invention uses Green Chemistry Theory and technology exactly, selects nontoxic development of raw materials green synthesis process, the production process of create environment friendly, product of the present invention when oil field stratum de-plugging, to operator and oil field environment nontoxic.Mechanism of the present invention is as follows with development main technical requirements of the present invention:
1, the neutral fracturing liquid de-plugging in oil extraction in oil field stratum mechanism
In oil extraction process, because Oil extraction uses the local water of different sources to inject mixing of water with ground, the cooling in local water extraction process, the heating in oil water separation process, just can produce incrustation scale.Injecting water or alkali aqueous solution to stratum in order to improve oil recovery factor, also can produce scale formation.In oil field, modal dirt is calcium carbonate scale, Calucium Silicate powder dirt, calcium sulfate scale, strontium sulfate scale and barium sulfate scale etc., is usually also included within dirt by salt high for the solubleness of high, the easy precipitation of content in some metallic corrosion products and some oil-field water.Fouling mainly occurs in the surface of formation rock surface that current pass through, line equipment, causes the blocking of stratum, pipeline, the corrosion of pipeline and equipment, affects normal oil production, even cause the possible permanent damage of oil reservoir.Need the generation taking measures to prevent dirt for this reason, remove the dirt that line equipment is tied in time.
The precipitation process of fouling and wax is similar, and the generation of dirt is through the formation of dirty nucleus, the growth of dirty nucleus and the deposition three phases of dirt.Dirt grows on some active site of solid surface, forms the particle of dirt.Because oil-reservoir water, injection water exist multiple positive and negative ion, dirt is made up of multiple inorganics often.Dirt and the balance of aqueous phase are dissolving, the ionization equilibrium of multiple inorganics, and the solubility product of each dirty composition, ionic product, ionization equilibrium relational expression, ionic strength and various ionic activity Relationship of Coefficients formulas etc. determine by form for its equilibrium conditions and equilibrium composition.Aqueous ion and solid surface material generation chemical reaction under certain conditions, such as corrosion, aqueous ion are to the dissolving of rock composition or the aqueous ion deposition etc. at rock surface, and therefore the precipitation of dirt is also relevant with the equilibrium constant of these chemical reactions.
The present invention considers from pore texture angle, according to complex scheme, improves recover for the purpose of reservoir permeability by expandable pores venturi.This neutral of the fracturing fluid scale removal dissolves dirt with oxidation, chain rupture and complexing, reaction generates mashed prod more gently, can avoid because precipitation produces particle, the neutral pressure break de-plugging of this fanout free region is for medium-high permeable reservoir, the maintenance of pore texture is relatively good, and the negative effect brought is relatively very little, for low permeability reservoir, neutral fracturing liquid de-plugging safety coefficient is high, and success ratio is also high.If adopt fracture acidizing de-plugging, once acidifying failure, those throw outs being insoluble to acid are with the pore constriction on particulate form flowing blocking stratum, and the difficulty making reservoir again carry out storey increase design increases greatly.The of the fracturing fluid scale removal of neutrality provided by the invention is to dredge pore constriction, to recover, for the purpose of reservoir permeability, the acid-soluble non-shales such as the carbonate in reservoir, silicates and metal oxide to be blocked material and is dissolved as mashed prod.Adopt neutral fracturing liquid pressure break provided by the invention de-plugging, do not injure reservoir skeleton, it is also more easy to control that potential throw out is dissolved in complexing, therefore, to reservoir fanout free region.
Neutral fracturing liquid is a kind of method using chemosmosis, solubilising, oxidation, chain rupture and conversion, dirty type generation chemical reaction is made to be converted into water-soluble salt, therefore good solubility is had to dirt in neutral conditions, very strong penetration power is had between the structure of dirt, can enter between dirty crystal grain, dirt is dissolved completely, the carbonate scale of calcium, magnesium, barium and strontium and sulfate scale are dissolved in water, generate solubility calcium, magnesium, barium and strontium salt; With the of the fracturing fluid active group of neutrality, sulfate scale can be converted into water miscible compound; The reactions such as the polycarboxylic acid amine salt in the divalence sulfonic acid salt crust deposited in oil reservoir, oil well pipe laying and this agent, under the effect of vanadium pentoxide catalyst, generate the micromolecular Sulfonates water solubles.-OH(alcoholic extract hydroxyl group in its stratum medium pitch dirt and other polymer scale and this agent component and phenolic hydroxyl group), the group generation synergistic effect such as-ONa, reaction chain rupture generates molecular weight polymers soluble in water, to reach the object thoroughly removing superpolymer material dirt and pitch dirt.In oil field stratum, polymer material dirt is under of the fracturing fluid effect, and by random depolymerization, the removing of side base and low-molecular material, the chain-breaking reaction that the molecular weight of polyacrylamide polymers material dirt can be caused to reduce, makes polymkeric substance easily degrade.
2, the neutral of the fracturing fluid technical requirements in oil extraction in oil field stratum is selected
The neutral fracturing liquid in oil field, by multiple complexing agent, permeate agent, wetting agent and kinds of surface promoting agent is composite forms, we are when studying the of the fracturing fluid prescription of the present invention's neutrality, each selected component is neutral or meta-alkalescence material, each component all can not produce corrosion to metallic substance, and its compatibleness of various ingredients used, mutual solubility, preservative property, wettability and stability are all fine, not containing H in unblocking agent
+, Cl
-, S
2-, SO
4 2-in the easy ion producing corrosive medium.Material used is all nontoxic, tasteless, corrosion-free or meta-alkalescence material, and is easy to degrade in the earth formation, free from environmental pollution.This fracturing liquid has good oxidation, chain rupture, coordination, complexing, infiltration and solvency action to carbonate, silicate, phosphoric acid salt and phosphatic calcium, magnesium ion, chemical cleaning speed is fast, also good scavenging(action) is had to silicate scale and sulfate scale, in oil field complexing pressure break de-plugging process, owing to not containing H in this agent
+and Cl
-corrosion is not produced to producing well equipment and oil recovery bar and well, without dead angle, do not produce precipitation in the earth formation, the secondary that cleaning materials precipitates is not caused to block up well, can under normal temperature to 100 DEG C condition, the descaling and blockage relieving time is 24 hours, the more important thing is and really reach corrosion-free safe neutral pressure break de-plugging, than traditional fracture acidizing de-plugging safety and reliability.
3, the neutral of the fracturing fluid safe reliability in oil extraction in oil field stratum
The neutral fracturing liquid of the present invention is not containing mineral acid, organic acid, highly basic and cleaning inhibiter, pH is 6 ~ 7, by neutral complexing agent, oxygenant, tensio-active agent, defoamers etc. are composite to be formed, fast in oil field stratum pressure break de-plugging speed, to bituminous matter dirt, sulfosalt surfactant dirt, polyacrylamide material dirt, various calcium magnesium salts dirt has very strong solvency action, in cleaning pressure break de-plugging process, really reach corrosion-free matting de-plugging, than traditional fracture acidizing mineral acid, organic acid, highly basic safety and reliability, completely eliminate because losing efficacy with inhibiter during acidifying strata, the burst factors such as inhibiter emulsification inequality or misoperation are to the corrosion of oil production equipment, the fracture acidizing de-plugging process of hydrochloric acid and hydrofluoric acid can be replaced completely in oil field stratum pressure break de-plugging process.
Details are as follows for oil extraction in oil field stratum of the present invention neutral fracturing liquid major technique effect:
1, single stage method can complete the pressure break de-plugging of oil field stratum
The present invention is primarily of poly-epoxy succinic acid amine, Ding Ji Benzyl base amine ethyl imidazol(e) quinoline quaternary ammonium chloride, tetrahydroglyoxaline phosphoric acid ester sodium, nonyl phenol oxygen Vinyl Ether-n, the multipolymer of methacrylic acid and methacrylic acid aminoalkyl fat, Potassium perfluorooctanoate, diethylaluminum ethoxide, carboxymethyl polygalactomannan, carboxymethyl carboxylic propyl group polygalactomannan, 2, 2 diethyldodecylamine, the kinds of surface promoting agent compositions such as Sodium dodecylbenzene sulfonate, of the fracturing fluid pH is 6 ~ 7, not containing mineral acid and organic acid, also not containing hydrogen ion, the harmful ion such as chlorion and sulfate radical, corrosion rate is less than 0.1g/ (m
2h), corrosion-free safe pressure break de-plugging is reached.Use this neutral fracturing liquid in oil field stratum pressure break de-plugging process, can under normal temperature to 100 DEG C condition, single stage method completes the neutral pressure break descaling and blockage relieving to all kinds of incrustation scale, without the need to neutralizing treatment and Passivation Treatment, save the neutral pressure break de-plugging time, 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 the present invention 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 neutral scale removal of the neutral fracturing liquid in oil extraction in oil field stratum.The tamper of this fracturing liquid 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 fast, fracturing liquid contacts 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 pressure break de-pluggings
The neutral fracturing liquid of the present invention; with pressure break de-plugging dredging pore constriction; recover, for the purpose of reservoir permeability, to the pressure break de-plugging of the polymer material dirt of carbonate scale, silicate scale, sulfate scale, sulfonate surfactant dirt, to there is good complexing, perviousness and solvability; the deep of oil field stratum can be penetrated into; pressure break de-plugging area is large, does not produce the phenomenon such as residue and secondary precipitate particulate, makes reservoir exempt from acid infringement; reaming effect is had, protection stratum support to kapillary.
Embodiment
Embodiment 1, take raw material: copolymer 1 2kg, the Potassium perfluorooctanoate 15kg of poly-epoxy succinic acid amine 37kg, Ding Ji Benzyl base amine ethyl imidazol(e) quinoline quaternary ammonium chloride 21kg, tetrahydroglyoxaline phosphoric acid ester sodium 1kg, nonyl phenol oxygen Vinyl Ether-n18kg, methacrylic acid and methacrylic acid aminoalkyl fat, diethylaluminum ethoxide 0.1kg, carboxymethyl polygalactomannan 14kg, carboxymethyl carboxylic propyl group polygalactomannan 28kg, 2,2 diethyldodecylamine 11kg, Sodium dodecylbenzene sulfonate 14kg and water 155kg.The raw material of above-mentioned parts by weight is prepared into the neutral fracturing fluid compositions in oil extraction in oil field stratum according to following preparation method:
1, copolymer 1 2kg, the Potassium perfluorooctanoate 15kg of poly-epoxy succinic acid amine 37kg, Ding Ji Benzyl base amine ethyl imidazol(e) quinoline quaternary ammonium chloride 21kg, tetrahydroglyoxaline phosphoric acid ester sodium 1kg, nonyl phenol oxygen Vinyl Ether-n 18kg, methacrylic acid and methacrylic acid aminoalkyl fat, diethylaluminum ethoxide 0.1kg and water 155kg are added in reactor, mix and blend obtains liquid to evenly in 30 minutes;
2, carboxymethyl polygalactomannan 14kg, carboxymethyl carboxylic propyl group polygalactomannan 28kg are added in cone blender, stir 30 minutes to evenly with cone blender, cross obtained first powder of 20 mesh sieves;
3,2,2 diethyldodecylamine 11kg, Sodium dodecylbenzene sulfonate 14kg add in tapered mixing and blending machine, stir 30 minutes to evenly, cross obtained second powder of 20 mesh sieves with tapered mixing and blending machine;
4, have gradation in the reactor of liquid to add the first powder and the second powder in the preparation of step 1, namely mix and blend makes the neutral fracturing fluid compositions in oil extraction in oil field stratum to evenly in 40 minutes.
Embodiment 2, take raw material: copolymer 1 4kg, the Potassium perfluorooctanoate 17kg of poly-epoxy succinic acid amine 40kg, Ding Ji Benzyl base amine ethyl imidazol(e) quinoline quaternary ammonium chloride 15kg, tetrahydroglyoxaline phosphoric acid ester sodium 3kg, nonyl phenol oxygen Vinyl Ether-n 21kg, methacrylic acid and methacrylic acid aminoalkyl fat, diethylaluminum ethoxide 0.2kg, carboxymethyl polygalactomannan 12kg, carboxymethyl carboxylic propyl group polygalactomannan 24kg, 2,2 diethyldodecylamine 13kg, Sodium dodecylbenzene sulfonate 17kg and water 160kg.The raw material of above-mentioned parts by weight is prepared into the preparation method of the neutral fracturing fluid compositions in oil extraction in oil field stratum with embodiment 1.
Embodiment 3, take raw material: copolymer 1 0kg, the Potassium perfluorooctanoate 15kg of poly-epoxy succinic acid amine 44kg, Ding Ji Benzyl base amine ethyl imidazol(e) quinoline quaternary ammonium chloride 20kg, tetrahydroglyoxaline phosphoric acid ester sodium 2.5kg, nonyl phenol oxygen Vinyl Ether-n 17kg, methacrylic acid and methacrylic acid aminoalkyl fat, diethylaluminum ethoxide 0.2kg, carboxymethyl polygalactomannan 13kg, carboxymethyl carboxylic propyl group polygalactomannan 26kg, 2,2 diethyldodecylamine 12kg, Sodium dodecylbenzene sulfonate 16kg and water 165kg.The raw material of above-mentioned parts by weight is prepared into the preparation method of the neutral fracturing fluid compositions in oil extraction in oil field stratum with embodiment 1.
Embodiment 4, take raw material: copolymer 1 3kg, the Potassium perfluorooctanoate 12kg of poly-epoxy succinic acid amine 39kg part, Ding Ji Benzyl base amine ethyl imidazol(e) quinoline quaternary ammonium chloride 15kg, tetrahydroglyoxaline phosphoric acid ester sodium 2kg, nonyl phenol oxygen Vinyl Ether-n 20kg, methacrylic acid and methacrylic acid aminoalkyl fat, diethylaluminum ethoxide 0.3kg, carboxymethyl polygalactomannan 12kg, carboxymethyl carboxylic propyl group polygalactomannan 24kg, 2,2 diethyldodecylamine 14kg, Sodium dodecylbenzene sulfonate 18kg and water 158kg.The raw material of above-mentioned parts by weight is prepared into the preparation method of the neutral fracturing fluid compositions in oil extraction in oil field stratum with embodiment 1.
Embodiment 5, take raw material: multipolymer 9kg, the Potassium perfluorooctanoate 13kg of poly-epoxy succinic acid amine 43kg, Ding Ji Benzyl base amine ethyl imidazol(e) quinoline quaternary ammonium chloride 18kg, tetrahydroglyoxaline phosphoric acid ester sodium 1.8kg, nonyl phenol oxygen Vinyl Ether-n 16kg, methacrylic acid and methacrylic acid aminoalkyl fat, diethylaluminum ethoxide 0.25kg, carboxymethyl polygalactomannan 10kg, carboxymethyl carboxylic propyl group polygalactomannan 20kg, 2,2 diethyldodecylamine 15kg, Sodium dodecylbenzene sulfonate 19.5kg and water 160kg.The raw material of above-mentioned parts by weight is prepared into the preparation method of the neutral fracturing fluid compositions in oil extraction in oil field stratum with embodiment 1.
Claims (3)
1. the neutral fracturing fluid compositions in oil extraction in oil field stratum, it is characterized in that being made up of the raw material of following portions by weight: poly-epoxy succinic acid amine 37 ~ 44 parts, Ding Ji Benzyl base amine ethyl imidazol(e) quinoline quaternary ammonium chloride 15 ~ 21 parts, 1 ~ 3 part, tetrahydroglyoxaline phosphoric acid ester sodium, nonyl phenol oxygen Vinyl Ether-n 16 ~ 21 parts, the multipolymer of methacrylic acid and methacrylic acid aminoalkyl fat 9 ~ 14 parts, Potassium perfluorooctanoate 12 ~ 17 parts, diethylaluminum ethoxide 0.1 ~ 0.3 part, carboxymethyl polygalactomannan 10 ~ 14 parts, carboxymethyl carboxylic propyl group polygalactomannan 20 ~ 28 parts, 2, 2 diethyldodecylamine 11 ~ 15 parts, Sodium dodecylbenzene sulfonate 14 ~ 20 parts and 155 ~ 165 parts, water.
2. the neutral fracturing fluid compositions in a kind of oil extraction in oil field stratum as claimed in claim 1, is characterized in that: the mass fraction of carboxymethyl polygalactomannan and carboxymethyl carboxylic propyl group polygalactomannan is 1:2; The mass fraction of 2,2 diethyldodecylamine and Sodium dodecylbenzene sulfonate is 1:1.3.
3. the neutral fracturing fluid compositions in a kind of oil extraction in oil field stratum as claimed in claim 1 or 2, its preparation method comprises the steps:
(1), the multipolymer 9 ~ 14 parts of poly-epoxy succinic acid amine 37 ~ 44 parts, Ding Ji Benzyl base amine ethyl imidazol(e) quinoline quaternary ammonium chloride 15 ~ 21 parts, 1 ~ 3 part, tetrahydroglyoxaline phosphoric acid ester sodium, nonyl phenol oxygen Vinyl Ether-n 16 ~ 21 parts, methacrylic acid and methacrylic acid aminoalkyl fat, Potassium perfluorooctanoate 12 ~ 17 parts, diethylaluminum ethoxide 0.1 ~ 0.3 part and 155 ~ 165 parts, water add in reactor, mix and blend obtains liquid to evenly in 30 minutes; This liquid is as the main component of neutral fracturing fluid compositions;
(2), carboxymethyl polygalactomannan 10 ~ 14 parts, carboxymethyl carboxylic propyl group polygalactomannan 20 ~ 28 parts add in cone blender, stirs 30 minutes to evenly, cross obtained first powder of 20 mesh sieves; First powder is as the viscosifying agent of neutral fracturing fluid compositions;
(3), 2,2 diethyldodecylamine 11 ~ 15 parts, Sodium dodecylbenzene sulfonate 14 ~ 20 parts add in tapered mixing and blending machine, stirs 30 minutes to evenly, cross obtained second powder of 20 mesh sieves; Second powder is as the Surfactant Used in Viscoelastic Fracturing Fluids of neutral fracturing fluid compositions;
(4), in the preparation of step (1) have gradation in the reactor of liquid to add the first powder and the second powder, namely mix and blend makes the neutral fracturing fluid compositions in oil extraction in oil field stratum to evenly in 40 minutes.
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| CN116285924A (en) * | 2020-11-16 | 2023-06-23 | 西安石油大油气科技有限公司 | Neutral blocking remover composition for oil extraction stratum of oil field and preparation method thereof |
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