CN101389728A - Process for breaking the viscosity of polymer-thickened aqueous systems for mineral oil and natural gas extraction - Google Patents
Process for breaking the viscosity of polymer-thickened aqueous systems for mineral oil and natural gas extraction Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/02—Well-drilling compositions
- C09K8/04—Aqueous well-drilling compositions
- C09K8/06—Clay-free compositions
- C09K8/12—Clay-free compositions containing synthetic organic macromolecular compounds or their precursors
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/602—Compositions for stimulating production by acting on the underground formation containing surfactants
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/66—Compositions based on water or polar solvents
- C09K8/68—Compositions based on water or polar solvents containing organic compounds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/84—Compositions based on water or polar solvents
- C09K8/86—Compositions based on water or polar solvents containing organic compounds
- C09K8/88—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/14—Double emulsions, i.e. oil-in-water-in-oil emulsions or water-in-oil-in-water emulsions
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/26—Gel breakers other than bacteria or enzymes
Abstract
A novel process is proposed for breaking the viscosity of an aqueous phase thickened with preferably hydrophilic polymers in the exploration and production of mineral oil and/or natural gas. For this purpose, the breakage is performed via the formation of a mobile emulsion with water as the continuous phase, this emulsion being formed by the addition of at least one surface-active component to a system which consists of the thickened flush and an oil phase, which comprises crude oil present in a deposit and/or an oil introduced into a deposit. The preferred surface-active components used are solubilizers between oil and water phase, and especially nonionic surfactants, cationic surfactants and/or amphoteric surfactants. In addition to the surface-active component, it is possible to use further components, which are demulsifiers, nonemulsifiers, cosurfactants or modifying agents for the surface tension. With the aid of this process, in the simultaneous presence of an oil phase, the aqueous phase as a mobile system is displaced and finally discharged to the surface, which is associated with extremely effective cleaning of the borehole. It is possible to completely dispense with the use of chemicals with regard to economic viability and from environmental points of view.
Description
Technical field
The present invention relates to a kind of new exploration that is reduced in oil and/or Sweet natural gas and produce in the method with the aqueous viscosity of polymkeric substance multiviscosisty.
Background technology
In various well treatment and stimulation fluids, use the multiviscosisty polymkeric substance in the exploration of oil and gas deposit with very general in producing.The importance that is used for the polymkeric substance of various situations has nothing in common with each other: at first, thereby for example they are produced in drilling fluid the shear-thinning theomorphism can remove better drilling cuttings or, for example with regard to the situation of so-called flow losses pill (fluid loss pills), realize filtrate control, this has reduced drilling fluid oozing out via hard Jing Qiang.Under so-called fracturing liquid situation, its viscosity prevents that sand (" propping agent ") from settling out prematurely from fluid, and sand wherein is introduced in the open-fractures and crack of rock stratum as the part of technology.In addition, the pressure that is used to break the rock stratum can gather during breaking more easily, particularly during what is called is with the waterfrac treatment of multiviscosisty fluidic.(" Composition and Properties ofDrilling and Completion Fluids ", the 5th edition, Darley H.C.H. ﹠amp; GrayG.R., Gulf Professional Publishing, Houston, 1983 and " OilfieldChemicals ", FinkJ.K., Gulf Professional Publishing, Houston, 2003).
In fact useful polymkeric substance viscosify aqueous systems just " based on water " (exploration) operation in, finally drilling fluid must be removed from well, it is very desirable that its viscosity can be lowered.May have a variety of causes to this, for example reclaim drilling fluid by simple method more from well and/or in order to avoid obstruction blowhole, this is in the productivity of negative impact reservoir rock subsequently.This will be favourable to itself, particularly by oil and natural gas being had weak infiltrative hard Jing Qiang, because the hole of rock and passage are by viscosified aqueous fluid or accumulate in all or part of obstruction of multiviscosisty biopolymer molecule on the reservoir rock, thereby reduced its hydrocarbon perviousness, this has same shortcoming.
Usually adopt diverse ways to reduce the viscosity of the Aquo System of using the polymkeric substance multiviscosisty: at first, polymer chain can be degraded by the oxidation parallel off or by thermolysis; The second, be possible by means of chemical substance or enzyme means hydrating polymer chain, wherein used strong inorganic acid and lytic enzyme.
To be used for the oxidative degradation of polymer chain as the alkali metal peroxide of superoxide source and initiated polymerization thing chain free radical parallel off.Wherein superoxide exists with the micro-capsule form and is known as the version of so-called " inner broken glue " adding multiviscosisty drilling fluid.With temperature trigger or to implement cracking and have time lag (US6,861,394) thus by means of acid activation also be possible.In thermolysis, the rising of the temperature of reservoir (reservoir) is used for degradable polymer.
In the chemical substance hydrolysis, usually with in the strong inorganic acid example hydrochloric acid pump suction well.This acid constituents is by the variation of pH, and also caused hydrolytic rupture by means of the temperature of dominant rising in subterranean strata.The enzymic degradation of polymkeric substance and common biological polymer and derivative thereof is possible when the zymin of correspondence can obtain only certainly, yet, always not so in practice situation.In addition, many enzyme systems are extremely sensitive, and for example by than higher temperature and sex change and lose their catalytic activity thus.As when existing,, for example being used for the salts solution of complete operation even in the presence of high ion concentration, zymin has less purposes.
The further conclusive shortcoming of above-mentioned two kinds of oxidations that are used for polymer degradation and hydrolytic process be since also can sedimentable insoluble polymer fragment (referring to " HighPerformance Fracture Fluid outperforms Conventional Fluids "; People such as Palmore L., World Oil, in June, 2003, the 42nd to 46 page).Although viscosity can reduce by the degraded of polymkeric substance, only solved generally in not satisfied mode by the rock stratum hole obstruction of the fragment that produces and the problem of rock stratum infringement thus.
First-class aspect processing technology in petro-technology is that the viscosity of wherein multiviscosisty water is once contacting the form of distortion that just reduces with oil from the rock stratum extraction.Yet up to now, proprietary so-called viscoelastic surfactant system (VES) can realize this point, because once contact the micella instability of great majority " bar-shaped " or " vermiform ", viscosity formation structural element so destroyed with oil.Because the importance that this behavior is quite practical discloses many publication and patents of using VES in oil field prospecting that relate to.For example can mention following patent: US4 in this article, 965,389, US2002/0033260, US2003/0236174, US6,762,154, WO98/56497A, US5,964,295 and US6,509,301.
Even thinking especially suitable VES system, verified only part is useful in based on the drilling fluid of water and particularly salt solution and fracturing liquid.Usually, in fact the high surface agent concentration is essential for the sufficient multiviscosisty of realization.In addition, has only minimum thermostability usually, with because tensio-active agent separates and falls the thin liquid shape from aqueous phase with the solution of VES multiviscosisty.Therefore in addition, particularly for so-called salt solution, require very special surfactant formula, such prescription also only can be used for very special system,, depends on the used salt and the unusual salt concn of standing of narrow range that is.In a word, we can say for satisfy in the practice to require many different products be essential, this says from economic angle, also is considered to negative certainly.
On the contrary, the multiviscosisty polymkeric substance particularly is proved to be useful in practice for a long time from those of biogenetic derivation, and therefore they extensively be used as the standard prod of viscosify aqueous systems in the oil and gas prospect.Biological polymer has purposes very widely, compares very tolerance with the different water-base drilling fluids of different components.From the angle of cost, polymer viscosity forms agent and is better than VES usually.At present, therefore many Aquo Systems that the multiviscosisty polymkeric substance is used for operating in the well are for example in the drilling fluid, and in drill-in fluid (drill-in fluids), the drilling fluid that promptly is used for the prospect drilling of hydrocarbon-containing formation, in the flow losses pill, the i.e. height multiviscosisty drilling fluid that usually only adds with the low relatively volume parts of drilling fluid, and in the well finishing liquid (brine fluids loss pill).The use of multiviscosisty polymkeric substance is in the waterfrac treatment fluid, at workover fluid or also be possible in acid solution.
Summary of the invention
In this article, multiviscosisty " wetting ability " polymkeric substance is interpreted as that all are natural and the non-natural source, non-crosslinked or crosslinked polymkeric substance, uses it for the multiviscosisty water.This also comprises salt-containing system (so-called salt solution), acid and the complicated more water-base drilling fluid that is used for subsurface investigation and production, and it can comprise further functional additive in addition.
Viscosity with the Aquo System of hydrophilic polymer multiviscosisty can not reduce by contacting with oil as particularly crude oil.On the contrary, there is such danger, be about to forms the stable dense ropy milk liquid of forming by water and oil phase, associated major issue in the completion that is used for producing hydrocarbon.Therefore, at the pay sand of boring, forming stable dense ropy milk liquid in so-called " payzone " may have execution to the productive rate of whole well.
In this article, term " oil " is interpreted as not miscible with water, as pure substance, and forms the implication of the hydrophobic liquid of two-phase system with water.According to this definition, oils comprises the fat of crude oil, diesel oil, mineral oil, ester oil, natural oil and triglyceride level form, saturated and unsaturated synthetic oil, internal olefin and alpha-olefin, also has the mixture of polypropylene glycol and chemical derivative and various oil type.
According to described prior art and disadvantages associated, target of the present invention be to provide a kind of be reduced in oil and/or gas prospecting, volume increase (stimulation) and/or produce in the improving one's methods of aqueous viscosity of polymkeric substance multiviscosisty.For the damage that reduces the amount of output oil and natural gas in formation damage and follow-up unit time, if can become possibility by contact the viscosity that reduces with the Aquo System of hydrophilic polymer multiviscosisty with oil by this method, this is desirable.This novel method should be implemented in technical simple mode, and especially therefore still economical.
This target is achieved by correlation method, wherein reduce by forming thin liquid shape (dunnflussigen) emulsion and realize, with water as external phase, this emulsion is by a) adding at least a surface active agent composition by the system of forming with the phase and the oil phase of polymkeric substance multiviscosisty and form, and oil phase wherein comprises the oil that is present in the reservoir and/or and the oil of introducing reservoir.
Surprisingly, have been found that by surface active cpd being introduced by the Aquo System of hydrophilic polymer multiviscosisty particularly, and there is oil phase simultaneously, the viscosity of Aquo System can reduce by forming emulsion, and the latter can be by instead of thin liquid shape system, and finally discharges from the ground horizon d.This method provides a kind of new possibility of extremely effectively removing drilling well.This method can be used for exploring for oil and Sweet natural gas, and in the latter case, the oil phase of requirement is incorporated in the drilling well from the outside.In addition, the chemical substance of used now extremely difficult processing for example the use of superoxide or responsive enzyme system can abandon fully.
And, have been found that the feature reheology model of polymkeric substance multiviscosisty water keeps by adding surface active composition of the present invention.Therefore the rheological behaviour of multiviscosisty water remain unchanged basically, and corresponding to adding surface active composition state before.And owing to add the formation of suitable oils and follow-up O/w emulsion (o/w emulsion) with the amount that is lower than threshold concentration, inapparent variation only takes place in rheological behaviour.Sometimes, the emulsion of acquisition even can improve rheological behaviour, the particularly high viscosity that exists with low shear rate, this is particularly important under the situation of the drilling fluid of the strength that is used to discharge drilling cuttings.
The present invention preferably proposes surface-active component a) is added viscous water base drilling fluid or oil phase.It also is possible in the two-phase that component a) is added.
In the method for the invention, at first formed the o/w emulsion, then, reduced to form for example (w/o/w) type of water-in-oil-in-water (water-in-oil-in-water) of more complicated, blended emulsion system thus by viscosity.All these have plenty of altogether that the multiviscosisty polymkeric substance is centered on by oil phase or at least hydrophilic polymer and oil interaction is arranged, make polymkeric substance in emulsion, interact and cause weakening of multiviscosisty.The result is the emulsion that viscosity reduces and lost the typical rheology behavior pattern of multiviscosisty polymkeric substance greatly, and this for example is understood that to mean in the situation of biological polymer, high bearing capacity under the low shear rate or high viscosity.
If want to reduce the viscosity of polymkeric substance viscosify aqueous systems with the crude oil in reservoir and the ground horizon d, the invention provides preferred method form of distortion, it makes that implementing this method with heavy-gravity crude oil (" heavy crude ") more becomes possibility: as mentioned above, suitable oil adding is comprised surface active composition water a) cause having formed the o/w emulsion, the adding concentration of oil is lower than so-called threshold concentration, and the formation of mixed emulsion that will final decline thin liquid shape has taken place under threshold concentration.If this stable o/w emulsion is contacted with crude oil in the ground horizon d, for the only a small amount of crude oil of the concentration that oversteps the extreme limit is essential, wherein mixed emulsion such as w/o/w type produce and the final viscosity in aqueous solution that reduces under threshold concentration.By means of this method, evading the problem that forms the high viscosity emulsion by dense consistency crude oil and multiviscosisty water becomes possibility, only can difficulty in emulsion and form the emulsion type that requires lentamente.
Usually, only require moderate to shear and prepare described emulsion, wherein said emulsion finally causes reducing with the aqueous viscosity of polymkeric substance multiviscosisty under the threshold concentration that surpasses oil, because its formation can promote greatly by adding surfactivity system of the present invention.In fact, during pumping is used for entering the oil of this well, exist to be used to form emulsion and and to be reduced in the sufficient flow condition of multiviscosisty polymer viscosity in the borehole wall zone.And, crude oil flowing in so-called payzone usually enough strongly to realize the thorough mixing of crude oil and multiviscosisty water.As a result, the crude oil of production has thin liquid shape (" lightweight " crude oil), therefore usually by itself destroying the polymers soln of multiviscosisty, can be washed out the rock stratum passage of subterranean zone in thin liquid shape emulsion.Like this, the oil stream of the horizon d of improvement can be realized in the very simple mode in technological process aspect with passing through year oil, because can be avoided by the formation damage of the rock stratum hole obstruction due to the multiviscosisty water.Finally, realized the improvement of oil production, this can calculate by the production in the regional whole time limit of service of holing at economic aspect.
For multiviscosisty water and the Aquo System in present circumstances, it is possible using the hydrophilic polymer (according to definition) of the chemical constitution of wide region.Such polymkeric substance can be natural and synthetic source.In can also be with synthesis mode deutero-natural polymer, preferred especially xanthan gum, Wei Lun (welan) glue, Dai Youtan glue (diutan), derivatived cellulose for example carboxymethyl cellulose (PAC, CMC) or Natvosol (HEC), guar gum and derivative thereof such as carboxymethyl (CMG)-or Carboxymethyl hydroxypropyl guar (CMHPG), hydroxypropylguar gum (HPG), starch and Sclerotium gum and suitable derivatives thereof.In synthetic polymer, particularly suitable be acrylic copolymer and acrylic terpolymer and have AMPS constitute block altogether-and terpolymer, and according to US6,579,947 new extreme heat stable polymer.
About introducing the oil ingredient of ground horizon d, the present invention propose at least by diesel oil, mineral oil, ester oil, vegetables oil (triglyceride level), saturated and unsaturated synthetic oil as just-that paraffinic hydrocarbon, internal olefin or alpha-olefin or polypropylene glycol are formed in a series of is at least a.Certainly, its chemically modified form and mixture also are suitable, and all form of distortion will especially preferably exist with low viscosity, and this is especially true under the method temperature.
Be used for falling the expectation emulsion of the requirement of thin liquid shape according to the present invention, reduce in order to cause viscosity, a certain proportion of oil, so-called threshold concentration must be exceeded between oil phase and the drilling fluid with the polymkeric substance multiviscosisty.Usually, about 1 to the 2 parts by volume oil of per 5 parts by volume viscosify aqueous systems is enough in emulsion.Yet this ratio can also change in wide region, and depends on the composition of water, used multiviscosisty polymkeric substance and oil greatly.As described in, each system all exist oil concrete threshold concentration.If be no more than, multiviscosisty polymer features reheology model keeps basically in the o/w emulsion.For purpose of the present invention, thereby can utilize this character in petroleum prospecting, to implement method of the present invention with full-bodied relatively crude oil.
In order to be suitable for must satisfying certain prerequisite as those members that preferably mention as the standard oil of introducing.They should have alap viscosity, and the viscosity that they can not negative impact multiviscosisty drilling fluid certainly.They also must be chosen wantonly, and to satisfy about the general condition of environment protection and they should be biodegradable.Particularly, vegetables oil as, for example plam oil, rapeseed oil, soya-bean oil and Semen Maydis oil and derivative thereof for example ester satisfy these conditions.
About component a), the present invention includes a version, wherein surface active composition is the solubilizing agent between oil phase and the water, particularly nonionic surface active agent, cats product and/or amphoterics, it is possible that these materials help to form emulsion of the presently claimed invention.The component of the nonionic surface active agent that is fit to particularly ethoxylation straight chain and/or side chain alcohols, ethoxylation carboxylic-acid, glycerine the ethoxylation ester and have ethoxylized nonylphenol, particularly NP-4-EO or the NP-6-EO of 2 to 11 ethylene oxide units (EO unit).In pure constituents, have 2 to 8 unitary C of EO
9-C
14Alcohol, and especially preferably to have 2 to 4 unitary ethoxylation tridecyl alcohols of EO be particularly suitable.Yet, have 9 to 14 carbon atoms and 2 to 8 unitary carboxylic acids of EO and also be fit to.The composition of ethoxylated amine series, C
8-C
18Alkanolamide or imidazolidine derivatives and particularly have 8 to 16 carbon atoms herein and cats product that 2 to 8 unitary amines of EO and cocoyl diethanolamino acid amides (cocodiethanolaminoamide) are considered to be fit to, and trimethyl-glycine and the amido propyl betaine that particularly has 8 to 14 carbon atoms are considered to suitable amphoterics.
Under special situation, use described surface active composition may be not enough to reduce the viscosity of the Aquo System of multiviscosisty as emulsifying agent separately.In fact it also is possible will forming the high viscosity emulsion, and it can be very stable.In these cases, if verifiedly adopt components b a) except that component) be useful.
This components b) preferably derive from the group of being made up of demulsifying compound, non-emulsifier, common-tensio-active agent or surface tension improving agent, all these preferably prevent to form stable high viscosity emulsion.
For purpose of the present invention, 2-Ethylhexyl Alcohol or tetrahydroglyoxaline quaternary salt (quats) and herein particularly methyl isophthalic acid-tallow (tallow) amido ethyl-2-tallow-tetrahydroglyoxaline metilsulfate or deemulsification polymkeric substance and particularly methacrylic acid type altogether-and terpolymer or (partly) ethoxylation rosin Amine D, 90% hydroabietylamine particularly, or polyether-modified polysiloxane has proved the typical composition of demulsifying compound or non-emulsifier.These compounds are effectively on the phase border as surfactant directly, and can therefore help the stable emulsion (non-emulsifier) that destroys micella and make emulsion instability (demulsifying compound) simultaneously or prevent to form stable micella and form thus.Particularly polyethers-modified polyorganosiloxane has proved useful, because they can use with lower concentration.This type of examples for compounds is from Goldschmidt GmbH, the Tegopren5802 of Essen and TEGO Antifoam MR475.They constitute the typical antifoams with deemulsification effect.What should consider on the one hand in this article is, with the Aquo System of hydrophilic polymer multiviscosisty by the adding emulsifying agent processed must with oil phase can be miscible.On the other hand, will make the demulsifying compound or the non-emulsifier of the emulsion be difficult to form requirement add usually.If excessive use as the surface active composition of emulsifying agent a) or use the surface tension improving agent, this lip-deep contradiction can be eliminated.Silicone resin derivative and/or polymkeric substance and particularly silicone oil with (entirely) fluorocarbons side chain be dimethicone or α for example, and ω-difunctionality silicone resin quaternary salt is the particularly suitable component of this type of properties-correcting agent.
The use of demulsifying compound or non-emulsifier may be essential, particularly when the polymer gel that will destroy in high salt concentration solution.Aspect utilisation technology, this is important in the situation of this so-called flow losses pill in well completion operations.Usually, when in Aquo System, falling the thin liquid shape will flow into the ground rock stratum and realize by crude oil the time, adopt the material of these classifications with the polymkeric substance multiviscosisty.
As for being preferably used as components b) the surface tension improving agent, when noticing that particularly dimethicone and perfluorinated hydrocarbon are forming very large contact angle with the border mutually of water.In the composition of silicone oil, dimethicone (DMPS) also is particularly suitable for, because they and most of oils are mixable, so just increased the surface tension between oil phase and the water.With the known above-mentioned difunctionality silicone resin quaternary salt of trade(brand)name Tegopren6921 to 6924 (from Goldschmidt GmbH) even effective with lower concentration, because they can accumulate in the phase border selectively, this makes them compare with not functionalized simple silicone oil to seem more suitable.In addition, these silicone resin derivatives can be easy to more combine in homogeneous phase and single-phase prescription with emulsifying agent than silicone oil.
Usually, should be noted that the formation of emulsion can additionally promote by using the surface tension improving agent, because need apply less shear energy to form the emulsion of wanting required for the present invention.
Be preferably hydrophilic compounds, and particularly alkyl polyglucoside (APG) type those and especially preferably have 6 to 12 carbon atoms those what is called altogether-tensio-active agent also is suitable for as components b).Altogether-tensio-active agent is characterised in that they can not promote emulsifying effect in order to the requirement that forms emulsion separately.Yet they are to support the effect of emulsifying agent according to mode of the presently claimed invention.Useful within the scope of the present invention altogether-tensio-active agent for example comprises Glucopon 215 CSUP from Cognis.
According to the present invention, of the present invention from preferred angle and by emulsifying agent (component a)) and demulsifying compound/non-emulsifier and/or surface tension improving agent and/or altogether-system that tensio-active agent is formed can add Aquo System and oil phase.The latter is feasible having only aspect the technological process when the oil that will fall the thin liquid shape being extracted in the well and viscosify aqueous systems will being replaced.If desired surfactant system adding water that will be related to the present invention promptly for example adds drilling fluid or fracturing liquid, this preferably at water by means of carrying out after with the polymkeric substance multiviscosisty than higher shearing rate.On the other hand, use medium shearing rate to be enough at the aqueous phase of multiviscosisty distribution table surfactant system equably.Therefore possible foam forms and can avoid reliably during the preparation drilling fluid.
Tensio-active agent in water and/or oil phase the suitable concentration used according to the present invention can change in wide region.They depend primarily on type and concentration, water and the oil phase of compound used in the prescription, multiviscosisty polymkeric substance or will be used for the composition of the oil mixt of emulsion formation.Preferably, component a) and optional b) separately should be with amount based on water under all situations and/or oil phase, between 0.05 and 5.0wt% between, and preferably between 0.1 and the consumption of 1.5wt% use.
As the content of having discussed again and again, preferred aspect of the present invention is that the o/w emulsion forms, it preferably when falling the thin liquid shape form with the mixed emulsion system take place.The o/w emulsion is an O/w emulsion, and water medium is equivalent to the wherein outside of dispersed oil droplets (continuously) phase.Being considered to particularly advantageous w/o/w emulsion in this article is the blended emulsion system, and it is also referred to as double emulsion.In these situations, further water is wrapped in aqueous phase emulsive oil droplet.
The present invention also propose with component a) and optional b) as preformulation.This should exist with the suspension that combines with the polymkeric substance that is suitable for the multiviscosisty water especially.Therefore in the practical situation, set of dispense is made as the product that adds with the water of polymkeric substance multiviscosisty and/or the oil in the surperficial suction well to fall the thin liquid shape separately.Yet component also can be distributed in water respectively and oil phase maybe can add two-phase separately, and this has mentioned in detail.The present invention is special to pay attention to such preferred embodiment, wherein will by component a) and optional b) the independent system adding multiviscosisty water formed, for example with the form of fracturing liquid, drill-in fluid, acid solution or completion brine.If will operate in the rock stratum (so-called payzone) of carrying oil, it also is possible adding so-called flow losses pill in well completion operations.Usually, special type of service has special importance for method of the present invention, uses it for oil-bearing ground floor zone in such form.
In this context, say that particularly the so-called single container products (one-container products) that the user is had special advantage has proved particularly advantageous from practical standpoint.Therefore, for example be suitable for the multiviscosisty water polymkeric substance can with surface-active component a) and the dry polymeric form of powder in the liquid mixture of optional and standard oil disperse.The user adopts liquid or pasty state list-container products then, its comprise requirement multiviscosisty water and with oil the follow-up all components that falls the thin liquid shape.In this case, be used to form outside the surfactant system of the present invention of emulsion, the oil of the definition of finite concentration ratio is added the multiviscosisty water, make initial viscosity with the water of polymkeric substance multiviscosisty be kept basically and stablize, formed the o/w emulsion thus.Have only when the concentration in certain definition of multiviscosisty aqueous phase oil is exceeded, viscosity just reduces, and interacts because oil phase has been intervened viscosity-formation of polymkeric substance.This flows into the drilling fluid of multiviscosisty by crude oil and in underground generation, drilling fluid has wherein comprised a certain proportion of oil quality that is lower than the setting range of threshold concentration in the rock stratum then.
The following example has been described the advantage of the method for the invention.
Embodiment
Embodiment 1
Usefulness Sclerotium gum (the trade(brand)name: Biovis of new system, from Degussa ConstructionPolymer GmbH) and the reduction of the fresh water drilling fluid viscosity of xanthan gum (trade(brand)name: Bioflow is from DegussaConstruction Polymer GmbH) multiviscosisty
Form explanation
DC212 is from Goldschmidt)
Annotate: the viscosity that requires the diesel oil reduction 350ml polymer gel of 100ml.
Description of test (form note):
Embodiment 2:
Density with Sclerotium gum (trade(brand)name Biovis) multiviscosisty is the CaCl of 10.5ppg (1.26g/ml)
2The viscosity of solution reduces
Form explanation
DC212)
Annotate: the viscosity that requires the diesel oil reduction 350ml polymer gel of 100ml.Do not have 2-Ethylhexyl Alcohol, viscosity can not reduce
Description of test (form note)
X restrains 2-Ethylhexyl Alcohol
Measure (B) at 0.5rpm and 100rpm with Brookfield
Measure (E) at 0.5rpm and 100rpm with Brookfield
Embodiment 3
The reduction of drilling fluid viscosity, wherein this drilling fluid contains the lime carbonate (" ablation carbonate (seized carbonate) ") and the diesel oil of Sclerotium gum, xanthan gum, treated starch and constrained diameter; Drilling fluid density is 9.3ppg (1.10g/ml)
Form explanation
Rewomid DC 212 and ethoxylation cocoyl amine with 5 EO
The combination of (trade(brand)name: Varonic K-205, from Goldschmidt)
Annotate: the viscosity that requires the diesel oil reduction 350ml polymer gel of 100ml.
Description of test (form note)
In each case, progressively add 50ml diesel oil and after stirring 5 minutes on the magnetic stirring apparatus, adopt FANN 35A rotational viscosimeter that the 350ml drilling fluid is carried out rheology with speed 10 to characterize in each case.
At last, the emulsion that forms is being mixed on Hamilton BeackMixer under the high relatively shearing rate.
Embodiment 4
Adopt the saturated well finishing liquid of crude oil multiviscosisty or of the fracturing fluid viscosity to reduce with Natvosol (HEC) or hydroxypropylguar gum (HPG).
Form explanation
Test A:
Emulsifying agent: ethoxylized nonylphenol (trade(brand)name: Tergitol with 4 EO
NP-4 is from Dow) and cocoyl diethanolamino acid amides (trade(brand)name:
Rewomid DC212) combination
Hydrochlorate (trade(brand)name: Accosoft 808 is from Stepan)
The oil that is used to reduce: from the crude oil in the Gulfian
The test explanation
4gHPG (Ecopol 120, from Economy Polymers) is added 350ml CaCl
2(density 11.6ppg 1.39g/ml) and under about 50 ℃ thoroughly stirred 45 minutes on magnetic stirring apparatus salt solution.To such an extent as to the gel that obtains dense thick can not the measurement with FANN35 like this (reading〉300).With 1.8 gram Tergitol NP-4,1.4 gram Accosoft808 with 1.0 gram Rewomid DC212 add the gel of multiviscosisty and stir down at 50 ℃ and to be distributed in the gel., 50 ℃ under 100ml crude oil be added in gel in beaker, and further stir lentamente thereafter.Oil dissolves in the polymer gel lentamente, can detect the spontaneous destruction of rheological behaviour after about 10 minutes, and eddy current forms by magnetic stir bar in beaker.Test shows on FANN 35 SA 3 and 6rpm under less than 3 reading.
Test B
Saturated CaBr
2Salt solution (density: 14.2ppg, 1.70g/ml)
Tergitol NP-4 and NP-6 are from Dow)
Non-emulsifier: methyl isophthalic acid-tallow amido ethyl-2-tallow-tetrahydroglyoxaline first sulphur
Hydrochlorate (trade(brand)name: Accosoft808)
The test explanation
5gHEC (HEC10 is from Dow Chemical) is added 350ml CaBr
2(density 14.2ppg 1.70g/ml) and under about 50 ℃ thoroughly stirred 45 minutes on magnetic stirring apparatus salt solution.To such an extent as to the gel that obtains dense thick can not the measurement with FANN 35 SA like this (reading〉300).With 1.7 gram TergitolNP-4,1.4 gram Accosoft808 with 1.0 gram TergitolNP-6 add the gel of multiviscosisty and stir down at 50 ℃ and to be distributed in the gel., 50 ℃ under 100ml crude oil be added in gel in beaker, and further stir lentamente thereafter.Oil dissolves in the polymer gel lentamente, can detect the spontaneous destruction of rheological behaviour after about 10 minutes, and eddy current forms by magnetic stir bar in beaker.Test shows on the FANN35 3 and 6rpm under less than 3 reading.
Embodiment 5
At CaBr
2(density: 9.7ppg, 1.17g/ml) Sclerotium gum in adopts low shear energy to reduce with the viscosity of diesel oil to solution
Form explanation
NP-4) and cocoyl diglycollic amide (trade(brand)name: Rewomid DC 212)
Combination
Surface tension improving agent: α-, ω-difunctionality silicone resin quaternary salt (trade(brand)name: Tegopren 6922,
From Goldschmidt)
The test explanation:
3.5 gram Sclerotium gums are added 350ml CaBr
2Salt solution (density: 9.75ppg, 1.17g/ml) in, densification is at room temperature finished on Hamilton BeachMixer during 20 minutes with lower velocity., 2.8 gram Rewomid DCs 212,1.3 gram Tergitol NP-4s and 0.1 gram Tegopren 6922 added the gel of multiviscosisty thereafter, and in homogenize 5 minutes in gel in beaker on the magnetic stirring apparatus.
100ml diesel oil is added in the beaker with polymer gel, thereby obtain preparaton (being heated to about 50 ℃).Opposite with previous test, diesel oil only is distributed in the gel by the turn beaker.After 3 minutes, the rheological behaviour of Sclerotium gum is destroyed in turn, forms the emulsion of thin liquid shape.Test shows among FANN 35 SA 3 and 6rpm under reading less than 3.
Yet, in the similar test that does not add Tegopren 6922, do not have and can observed viscosity reduce.
Embodiment 6:
At CaCl
2Solution (10.5ppg, 1.26g/ml) middle Sclerotium gum reduces with the viscosity of diesel oil, and prescription of the present invention partly or entirely adds in the diesel oil
Form explanation:
Emulsifying agent: cocoyl diglycollic amide (trade(brand)name: Rewomid DC 212)
The test explanation:
Test A:
3.5 gram Sclerotium gums are added 350ml CaCl
2Salt solution (density: 10.5ppg, 1.26g/ml) in, densification is at room temperature finished on Hamilton BeachMixer during 20 minutes with lower velocity., 3.3 gram Rewomid DC212s added the gel of multiviscosisty thereafter, and in homogenize 5 minutes in gel in beaker on the magnetic stirring apparatus.
The 100ml diesel oil that has wherein added 0.2 gram Tegopren6924 is in advance added in the beaker with the polymer gel and the Rewomid DC 212 that are heated to above 50 ℃.Diesel oil can be distributed in the gel by the turn beaker simply easily.After 3 minutes, the rheological behaviour of Sclerotium gum is destroyed: the emulsion of thin liquid shape forms.Test shows among FANN 35 SA 3 and 6rpm under reading less than 3.
Test B
Test B with like the test category-A, in this case, 3.5 gram Rewomid DC212 and Tegopren 6924 are added to diesel oil.With the result and from the contrast of testing A.Wherein Sclerotium gum rheological behaviour destructive thin liquid shape emulsion can form by turn simply.
Embodiment 7:
Acrylic acid synthesizing/acrylamide copolymer (PHPA) reduces with the viscosity of diesel oil
Form explanation:
NP-4 is from Dow) and the cocoyl diglycollic amide (trade(brand)name:
Rewomid DC 212) combination
Surface tension improving agent: α-, ω-difunctionality silicone resin quaternary salt (trade(brand)name: Tegopren 6922)
The test explanation:
0.5 gram Praestol 2350 is added the 350ml tap water, and multiviscosisty realized by going up to stir at magnetic stirring apparatus (speed 5 or 10) during 40 minutes, produces clarifying gel., 2.8 gram Rewomid DC, 212,1.3 gram Tergitol NP-4 and 0.1 gram Tegopren6922 are added the gel of multiviscosisty thereafter, and in beaker on magnetic stirring apparatus homogenize went into gel 5 minutes; It is muddy that gel becomes, but rheological behaviour is kept.
The diesel oil of 100ml is added beaker with polymer gel and preparaton (being heated to about 50 ℃), and further on magnetic stirring apparatus, stir with speed 5.After diesel oil emulsification, gelatinous denseness disappears.After about 15 minutes, form the emulsion of thin liquid shape.The test shows on the FANN 35SA rotational viscosimeter 3 and 6rpm under less than 3 reading.
Embodiment 8:
The salts solution of xanthan gum-multiviscosisty (3% NaCl and the CaCl of 10.0ppg
2) and the just viscosity reduction of paraffin hydrocarbon ils (C11-C16): adopt " list-container products " (being dispersed in the xanthan gum in the surfactant system of the present invention)
Form explanation
Cognis)
The oil that is used to reduce: just-paraffin alkane, C11-C16 (trade(brand)name: BioBase 560 is from Shrieve)
Polymers?GmbH)
The preparation of " single container products "
25 gram Bioflow (xanthan gum) are added to the uniform mixture of cocoyl diethanolamino acid amides (Rewomid DC 212), 9.5 gram 2-Ethylhexyl Alcohols and the 6.5 gram C8-C10 alkyl polyglucosides (Glucopon 215 CSUP) of 19 grams, and stirred 3 hours.The denseness of the product that obtains is a pasty state.
The test explanation:
In each situation, single container products of 6 gram acquisitions is added the CaCl that 3%NaCl or 10ppg are arranged of 350ml
2Salts solution, and on HBM, mixed 15 minutes with lower velocity, being thickened to viscosity up to solution does not further increase.Adopt FANN 35SA rotational viscosimeter to record the viscosity of solution down in room temperature (RT) with at 120 ℉ (about 55 ℃) afterwards.Finish in about 120 ℉ in order to being added on the magnetic stirring apparatus of oil of falling the thin liquid shape, oil is sneaked into by stirring about 3 minutes.The method that is used for viscosity measurement is described in down " explanation " hurdle of tabulation:
A) 3%NaCl solution
| Test No. | Explanation | FANN reading 600-300-200-100-6-3 | PV* [cP] | YP** [1bs/100ft 2] |
| 1 | Under RT, test | 52-43-40-34-19-17 | 9 | 34 |
| 2 | Under 120 ℉, test | 48-39-36-31-17-15 | 9 | 30 |
| 3 | The BB560 that adds 50ml adds under 120 ℉ | 57-39-32-23-6-4 | 18 | 21 |
| 4 | Further adding 50ml (100ml altogether) BB 560 adds under 120 ℉ | 36-22-17-12-2-1 | 14 | 8 |
* PV: plastic viscosity
* YP: yield point (Yield Point)
B) 10ppg CaCl
2Solution
| Test No. | Explanation | FANN reading 600-300-200-100-6-3 | PV* [cP] | YP** [1bs/100ft 2] |
| 5 | Under RT, test | 54-42-37-28-12-10 | 12 | 30 |
| 6 | Under 120 ℉, test | 46-37-32-25-10-8 | 9 | 28 |
| 7 | The BB560 that adds 50ml | 41-33-28-21-7-5 | 8 | 25 |
| Under 120 ℉, add | ||||
| 8 | Further adding 50ml (100ml altogether) BB 560 adds under 120 ℉ | 30-18-14-9-1-1 | 12 | 6 |
* PV: plastic viscosity
* YP: yield point (Yield Point)
These two tables show that the viscosity of xanthan gum are reduced by the adding of 100mlBiobase (BB) 560: for xanthan gum 6 and 3rpm under typical high low side reading significantly reduce.
Embodiment 9
Xanthan gum multiviscosisty salts solution (NaCl of 9.5ppg and the CaCl of 10.0ppg
2) reduce with the viscosity of crude oil, rapeseed oil is added so that the polymers soln stdn.
Form explanation
Hydrochlorate (trade(brand)name: Accosoft 808)
Be used for standardized rapeseed oil or Semen Maydis oil
The test explanation:
In all cases, the NaCl or the CaCl that 2.5 gram Bioflow are added 350ml
2Salt solution, and densification is being realized on Hamilton BeachMixer during 20 minutes under the RT with lower velocity., in all cases 3.15 gram Rewomid DC 212 and 0.35 gram Accosoft 808 are added the gel of multiviscosisty thereafter, and in beaker on magnetic stirring apparatus homogenize went into gel 5 minutes.In all cases with in 35 gram rapeseed oils addings two batch, again use magnetic stirrer 5 minute thereafter.Formed the o/w emulsion of stable abundant multiviscosisty.The beaker that polymer gel is housed is heated to 55 ℃, adopts its rheological behaviour of FANN35SA rotary viscosity measuring.Thereafter, in all cases 100ml crude oil is added and stir and carry out once more on magnetic stirring apparatus, being heated to before FANN 35SA measures 55 ℃ about 10 minutes.Repeat 4 or 5 times and add the 100ml crude oil and measure rheological behaviours down, added 200 or 250ml crude oil then altogether at 55 ℃.
A) the NaCl solution of 9.5ppg (density=1.14g/ml)
Be used for standardized oil: rapeseed oil
| Test No. | (all are tested under 55 ℃) is described | FANN reading 600-300-200-100-6-3 | PV* [cP] | YP** [1bs/100ft 2] |
| 1 | After adding the 35g rapeseed oil | 59-46-40-32-15-12 | 13 | 33 |
| 2 | Further add crude oil: add 100ml | 38-27-22-16-6-6 | 11 | 19 |
| 3 | Add 100ml | 38-27-22-16-6-5 | 11 | 16 |
| 4 | Add 100ml | 10 | 26 | |
| 5 | Add 100ml | 46-36-31-22-5-3 | 18 | 25 |
| 6 | Add 100ml | 61-43-35-24-5-3 54-41-36-24-5-3 | 13 | 28 |
* PV: plastic viscosity
* YP: yield point (Yield Point)
Note: the viscosity under the low shear rate (6 and 3 reading) significantly reduces after adding crude oil, even and add excessive crude oil and also remain on low-level.The increase of yield point (YP) is a demulcent with the adding of oil, does not reach the level of initial system.
B) CaCl of 10.0ppg
2Solution (density=1.20g/ml)
Be used for standardized oil: Semen Maydis oil
| Test No. | (all are tested under 55 ℃) is described | FANN reading 600-300-200-100-6-3 | PV* [cP] | YP** [1bs/100ft 2] |
| 1 | After adding 35g Semen Maydis oil | 79-62-53-41-17-14 | 17 | 45 |
| 2 | Further add crude oil: add 100ml | 67-50-43-33-12-10 | 17 | 33 |
| 3 | Add 100ml | 50-35-29-21-7-5 | 15 | 20 |
| 4 | Add 100ml | 15 | 21 | |
| 5 | Add 100ml | 51-36-30-21-5-3 52-36-32-22-4-2 | 16 | 20 |
* PV: plastic viscosity
* YP: yield point (Yield Point)
Note: the viscosity under the low shear rate (6 and 3 reading) significantly reduces after adding crude oil, even and add excessive crude oil and also remain on low-level.Yield point (YP) reduces with the adding of oil, and is stabilized in low-level.
Claims (18)
1, a kind of method that reduces in oil and/or gas prospecting, volume increase and/or in producing with the aqueous viscosity of polymkeric substance multiviscosisty, be characterised in that reduction is to realize by forming with the thin liquid shape emulsion of water as external phase, this emulsion a) forms in system by adding at least a surface active composition, wherein this system is made up of water and oil phase with the polymkeric substance multiviscosisty, and this oil phase is to be present in the crude oil of reservoir and/or is the oil that is introduced into reservoir.
2, the method for claim 1 is characterized in that a) adding with the water of polymkeric substance multiviscosisty surface active agent composition and/or adding oil phase.
3, claim 1 or 2 method, the oil that it is characterized in that introducing reservoir is be selected from following material at least a: the fat of diesel oil, mineral oil, ester oil, natural oil or triglyceride level form, saturated and unsaturated synthetic oil, as just-paraffinic hydrocarbon, internal olefin or alpha-olefin or polypropylene glycol, with and chemically modified form and mixture, preferably have the thin liquid shape.
4, each method in the claim 1 to 3 is characterized in that component is a solubilizing agent between oil phase and the water a).
5, the method for claim 4 is characterized in that the solubilizing agent between oil phase and the water is nonionic surface active agent, cats product and/or amphoterics.
6, the method for claim 5, it is characterized in that to be selected from the following at least a nonionic surface active agent that is used as: ethoxylation straight chain and/or side chain alcohols, the alcohols that preferably has 9 to 14 carbon atoms and 2 to 8 ethylene oxide units, the ethoxylation tridecyl alcohol that especially preferably has 2 to 4 ethylene oxide units, the ethoxylation carboxylic-acid, the carboxylic-acid that preferably has 9 to 14 carbon atoms and 2 to 8 ethylene oxide units, the ethoxylation ester of glycerine and ethoxylized nonylphenol with 2 to 11 ethylene oxide units.
7, the method for claim 5, it is characterized in that to be selected from following at least a: ethoxylated amine, have the alkanolamide and the imidazolidine derivatives of 8 to 18 carbon atoms, preferably have the amine and the cocoyl diethanolamino acid amides of 8 to 16 carbon atoms and 2 to 8 ethylene oxide units as cats product.
8, the method for claim 5 is characterized in that trimethyl-glycine, and the amido propyl betaine that preferably has 8 to 14 carbon atoms is as amphoterics.
9, each method in the claim 1 to 8 is characterized in that using components b in component outside a)), its be selected from demulsifying compound, non-emulsifier, altogether-tensio-active agent and surface tension improving agent, it preferably prevents the formation of magma shape emulsion.
10, the method for claim 9, it is characterized in that demulsifying compound or non-emulsifier are for being selected from 2-Ethylhexyl Alcohol, tetrahydroglyoxaline quaternary salt, preferable methyl-1-tallow-amido ethyl-2-tallow tetrahydroglyoxaline metilsulfate, emulsion breaking polymkeric substance, the preferable methyl acrylic type altogether-and terpolymer or (part) ethoxylation rosin Amine D, preferred especially 90% hydroabietylamine and polyethers-modified polyorganosiloxane at least a.
11, the method for claim 9 is characterized in that having silicone resin derivative and/or polymkeric substance and the particularly silicone oil of (entirely) fluorocarbons side chain, and as dimethicone or α, ω-difunctionality silicone resin quaternary salt is as the surface tension improving agent.
12, the method for claim 9, it is characterized in that altogether-tensio-active agent is a hydrophilic compounds, preferred alkyl polyglucoside (APG) type hydrophilic compounds, and the hydrophilic compounds that especially preferably has 6 to 12 carbon atoms.
13, each method in the claim 1 to 12, it is characterized in that component a) and optional b) separately with based on the amount of water and/or oil phase 0.05 to 5.0wt% between, the amount between preferred 0.1 to 1.5wt% is used.
14, each method in the claim 1 to 13 is characterized in that forming O/w emulsion (o/w emulsion).
15, each method in the claim 1 to 14 is characterized in that when viscosity reduces forming the mixed emulsion system, preferably with the form of water-in-oil-in-water compositions (w/o/w emulsion).
16, each method in the claim 1 to 15, it is characterized in that with component a) and optional b) as preformulation, preferably as and the polymeric constituent bonded suspension that is suitable for the multiviscosisty water.
17, each method in the claim 1 to 16 is characterized in that the water with the polymkeric substance multiviscosisty is a drilling fluid, preferably fracturing liquid, drill-in fluid, acid solution, completion brine or flow losses pill.
18, each method in the claim 1 to 17 is characterized in that using it for oil-transmission ground layer zone.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102006003201.2 | 2006-01-24 | ||
| DE200610003201 DE102006003201A1 (en) | 2006-01-24 | 2006-01-24 | Reducing viscosity of polymer thickened aqueous phase with crude oil and/or natural gas, comprises forming highly liquid emulsion with water as continuous phase, where emulsion is formed by adding surface active component to system |
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| CN101389728A true CN101389728A (en) | 2009-03-18 |
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| CNA2007800033681A Pending CN101389728A (en) | 2006-01-24 | 2007-01-23 | Process for breaking the viscosity of polymer-thickened aqueous systems for mineral oil and natural gas extraction |
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| Country | Link |
|---|---|
| CN (1) | CN101389728A (en) |
| DE (1) | DE102006003201A1 (en) |
| RU (1) | RU2008134501A (en) |
| WO (1) | WO2007085423A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101927139A (en) * | 2010-07-12 | 2010-12-29 | 孙安顺 | Self-emulsifier and use thereof in tertiary oil recovery |
| CN102585785A (en) * | 2011-12-14 | 2012-07-18 | 山东大学 | Method for improving rheological property of oil base drilling fluid |
| CN104403655A (en) * | 2014-11-28 | 2015-03-11 | 中国石油天然气股份有限公司 | Novel fracturing fluid for oil field and preparation method of fracturing liquid |
| CN111763510A (en) * | 2020-07-07 | 2020-10-13 | 山东新港化工有限公司 | Temperature-resistant salt-resistant surfactant for pressure reduction and injection augmentation and preparation method and application thereof |
| US11345847B2 (en) | 2016-08-01 | 2022-05-31 | Schlumberger Technology Corporation | Treatment fluid, method for formation treatment, method for reducing the proppant settling rate in the formation treatment fluid |
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| ITMI20071196A1 (en) * | 2007-06-14 | 2008-12-15 | Eni Spa | WATER-BASED FLUIDS TO PREVENT THE FORMATION OF W-O EMULSIONS OR TO RESOLVE EMULSIONS W-O ALREADY FORMED IN POROUS MATRICES |
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| CN102093876B (en) * | 2009-12-09 | 2013-02-13 | 中国石油天然气股份有限公司 | Hyposmosis thixotropic gel temporary plugging agent for acidifying oil layer of oil field and preparation and application thereof |
| FR2967686B1 (en) * | 2010-11-23 | 2014-01-24 | IFP Energies Nouvelles | METHOD FOR ASSISTED HYDROCARBON RECOVERY USING ASSOCIATIVE POLYMERS AND SURFACTANTS |
| DE102012003224A1 (en) | 2012-02-20 | 2013-08-22 | Sasol Germany Gmbh | Drilling fluid, use and method using the drilling fluid |
| CN104119851A (en) * | 2014-06-27 | 2014-10-29 | 黄爱先 | Novel viscosity reducer for viscous oil |
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| CN110686164B (en) * | 2019-02-27 | 2021-03-02 | 山东宝龙达实业集团有限公司 | Method for reducing viscosity of crude oil |
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Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3943954A (en) * | 1974-04-29 | 1976-03-16 | Texaco Inc. | Pipeline transportation of viscous hydrocarbons |
| GB2383355A (en) * | 2001-12-22 | 2003-06-25 | Schlumberger Holdings | An aqueous viscoelastic fluid containing hydrophobically modified polymer and viscoelastic surfactant |
-
2006
- 2006-01-24 DE DE200610003201 patent/DE102006003201A1/en not_active Withdrawn
-
2007
- 2007-01-23 WO PCT/EP2007/000564 patent/WO2007085423A1/en active Application Filing
- 2007-01-23 RU RU2008134501/03A patent/RU2008134501A/en not_active Application Discontinuation
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101927139A (en) * | 2010-07-12 | 2010-12-29 | 孙安顺 | Self-emulsifier and use thereof in tertiary oil recovery |
| CN101927139B (en) * | 2010-07-12 | 2012-05-30 | 孙安顺 | Self-emulsifier and use thereof in tertiary oil recovery |
| CN102585785A (en) * | 2011-12-14 | 2012-07-18 | 山东大学 | Method for improving rheological property of oil base drilling fluid |
| CN104403655A (en) * | 2014-11-28 | 2015-03-11 | 中国石油天然气股份有限公司 | Novel fracturing fluid for oil field and preparation method of fracturing liquid |
| CN104403655B (en) * | 2014-11-28 | 2017-08-04 | 中国石油天然气股份有限公司 | A kind of oil field fracturing fluid and preparation method thereof |
| US11345847B2 (en) | 2016-08-01 | 2022-05-31 | Schlumberger Technology Corporation | Treatment fluid, method for formation treatment, method for reducing the proppant settling rate in the formation treatment fluid |
| CN111763510A (en) * | 2020-07-07 | 2020-10-13 | 山东新港化工有限公司 | Temperature-resistant salt-resistant surfactant for pressure reduction and injection augmentation and preparation method and application thereof |
| CN111763510B (en) * | 2020-07-07 | 2021-08-06 | 山东新港化工有限公司 | Temperature-resistant salt-resistant surfactant for pressure reduction and injection augmentation and preparation method and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| RU2008134501A (en) | 2010-02-27 |
| WO2007085423A1 (en) | 2007-08-02 |
| DE102006003201A1 (en) | 2007-07-26 |
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