Composition for production and transportation of oil and its production method

 

The invention relates to the oil and gas industry, in particular compositions for the production and transportation of oil, as well as compositions for combating asphaltene-maloperation deposits in oil field equipment, in the bottom-hole zone of oil wells and pipelines. Composition for production and transportation of oil contains 98,0-99.9% of the multicomponent mixture of synthetic anionic (AS) and nonionic (nonionic surfactants) surfactants, polyoxyethylene alkylation phosphoric acid, a hydrocarbon solvent, aliphatic alcohol or aromatic alcohol, or products containing them, and 0.1 to 2.0% of the additive of the modified dispersed silica mark Policy. Composition for stabilizing contains a water-soluble polymer. The composition is obtained by introducing a multicomponent mixture of the above composition of the modified dispersed silica mark Policy or its mixture with an aqueous solution of water-soluble polymer. The technical result is an increase in the permeability of the injection wells, emulsification, dispersion and stabilization of the particles of solid impurities (ASPO), as well as the displacement of oil from slobodianiuk intervals and clogging of the aquifer channel is dobyvayuschey industry, in particular, compositions for production and transportation of oil, as well as compositions for combating asphaltene-maloperation deposits in oil field equipment, in the bottom-hole zone of oil wells and pipelines.

Known composition for the production and transportation of oil (patent RU 2001090, 5, FROM 09 TO 3/00, publ. 15.10.93,, bull. 37-38), which contains a nonionic surfactant (nonionic surfactants) having 6-13 oxyethyl groups, in the amount of 1-10 wt. %; sodium Las 5-15 wt.%; sodium alkanesulfonyl 3-30 wt. %; anionic polyelectrolyte (4 MM104-5106) in an amount of 1-10 wt.%; aliphatic alcohol of 0.1-20 wt.%; acid - rest.

The composition has high washing ability, a wide range of actions to prevent the formation of deposits and reduce the hydraulic resistance of the viscous oil, but it has limited scope, as it is only used for carbonate reservoirs.

Known composition for removing paraffin and method thereof (SU, and.with. 1613471, 5, From 09 To 3/00, publ. 15.12.90, bull. 46), which contains 17-18 wt.% natural gasoline, 2-3 wt.% the neonols, 50 wt.% ethanol and 30 wt.% sulphuric acid.

Although the composition has good Rast is Atyrau (90-100oC and above).

Known composition for the production and transportation of oil (RU patent 1110152, 5, From 09 To 3/00, E 21 In 37/00, publ. 30.08.94, bull. 16) containing sodium Las 15-35 wt.%, nonionic surfactant with 6-13 oxyethyl groups 3-12 wt.%, ethoxylated alkyl ester of phosphoric acid or its potassium or ethanolamine salt 1-4 wt.%, hydrocarbon solvent 5-15 wt.%, sodium alkanesulfonyl - rest.

The composition effectively prevents the formation of asphaltene-maloperation sediments, however, the composition has a high viscosity, so when transporting active high-viscosity oils have high hydraulic resistance. When pumping into the well with a high temperature reservoir (100oC or higher) composition as a result of thermal decomposition loses detergents and solvent ASPO properties. Furthermore, the preparation of known composition is difficult in the cold season (at zero temperature) because of the relatively rapid solidification.

Known composition to prevent asphaltene-maloperation sediments (SU patent 1706204, 5, From 09 To 3/00, E 21 In 37/00, publ. 15.11.94, bull. 21) containing the following components at a ratio, by weight. %: sodium Las 10-30, laminova salt 1-5, hydrocarbon solvent 7,5-15, an aliphatic alcohol, C1-C310-20, ethylene glycol or propylene glycol 5-15, sodium alkanesulfonyl - rest.

This composition is effective in preventing the formation of deposits, has a low hydraulic resistance of the high-viscosity oil during transportation through the pipelines, however, in this structure are not used aromatic alcohols, as well as waste products of aliphatic and aromatic alcohols.

In addition, the composition is prepared immediately before injection into the well, making it difficult to cook in the cold season in Siberia and the Far North.

The closest in technical essence and the achieved result is a composition for the production and transportation of oil (RU patent 2176656, 7, From 09 To 3/00, E 21 In 37/06, publ. 10.12.2001, bull. 34), containing multicomponent mixture of synthetic anionic and nonionic surfactants, ethoxylated esters of phosphoric acid, a hydrocarbon solvent, aliphatic alcohol or aromatic alcohol, or products containing them, in the following ratio, wt.%: Multicomponent mixture of natural latex and synthetic, nonionic surfactants, polyoxyethylene alkylation phosphoric sour is the following - 10-50 Composition has low viscosity, good connections to the reduction of hydraulic resistance of the active high-viscosity oil in the transportation of their pipes, has a high thermal stability in oil production. Compositions on the basis of this composition can be prepared in the cold season (below the 0oC), which is very important in field conditions, for example in conditions of the North and Siberia, and the composition is highly effective for preventing the formation asphaltene-maloperation deposits.

However, the composition is insufficient hydrofobicity surface rocks in injection wells that does not remove rychlovarnou produced water from previously adrenergenic or poorly drained intervals and zones of the reservoir, not enough emuleret, disperses and stabilizes the particles of solid impurities (ASPO), weakly cause blockage aquifer channels in producing wells.

The objective of the proposed invention is the creation of a universal structure, which would ensure the destruction of rychlovarnou produced water from previously adrenergenic or poorly drained intervals and zones of the reservoir and prevented the dispersion and swelling of clay particles due to the increase Gert high oil-driving properties of its increased emulsification, the dispersion and stabilization of the particles of solid impurities (ASPO), and also resulted in the displacement of oil from poorly drained intervals and caused clogging of the aquifer channels in producing wells.

The problem is solved in that the composition for production and transportation of oil containing multicomponent mixture of synthetic anionic (AS) and nonionic (nonionic surfactants) surfactants, polyoxyethylene alkylation phosphoric acid, a hydrocarbon solvent, aliphatic alcohol or aromatic alcohol, or products containing them, characterized in that it further contains an additive of the modified dispersed silica mark Policy in the following ratio, wt.%: Multicomponent mixture of natural latex and synthetic, nonionic surfactants, polyoxyethylene alkylation phosphoric acid, a hydrocarbon solvent, aliphatic or aromatic alcohol, or products containing them - 98,0-99,9 Policy - 0,1-2,0 Composition is characterized by the fact that in order to stabilize it contains a water-soluble polymer selected from the group of: polyacrylamide, cellulose ether, and mixtures thereof in amounts of 0.05 to 1.0 wt.%.

A method of obtaining a composition for production and transportation of oil differs neetilirovannyj of alkylation phosphoric acid, hydrocarbon solvent, aliphatic alcohol or aromatic alcohol, or products containing them, add the modified dispersed silica mark Policy or its mixture with an aqueous solution of water-soluble polymer selected from the group of: polyacrylamide, cellulose ether, and mixtures thereof.

The proposed composition is obtained by introducing in the finished multi-component mixture of the above composition of the modified dispersed material brand Policy or its mixture with an aqueous solution of water-soluble polymer.

The quality of the finished multi-component mixture is used, the composition of the above composition (prototype), which comes in, Chapayevsk, Samara region, CJSC "Himsintez", and Samara on the company "Delta-prom".

As the anionic surfactant composition contains sodium Las, with linear alkyl radical containing 8 to 11 carbon atoms and sodium alkanesulfonyl with 12-18 carbon atoms in the alkyl radical.

As the nonionic surfactant composition contains monoalkyl ethers of polyethylene glycol based on fatty alcohols fraction10-C13or fraction10-C20or m is racchi C10-C16.

As the hydrocarbon solvent composition contains kerosene, gasoline, hexane fraction (a mixture of saturated hydrocarbons With6-C8and above), nefras, white spirit, petroleum ether or other hydrocarbon solvents.

As the aliphatic alcohols used monovalent alcohols: methyl, ethyl, isopropyl, etc. but often double alcohols (diols) - glycols: ethylene glycol, diethylene glycol, propylene glycol, polyglycols and others; and polyhydric alcohols such as glycerin, as well as the products that contain them, for example, VAT residue from the production of butyl alcohol; waste glycols: anyspecial, polyglycols and other wastes containing glycols; waste - polyglycine, etc. and mixtures thereof.

As aromatic alcohols using phenol and the products it contains, for example phenolic resins - waste production of phenol and acetone, etc.

As water-soluble polymers using polyacrylamide (PAA) as a high molecular weight (MM 10-18106) and low molecular weight (MM 0,5-5106); cellulose ethers such as carboxymethylcellulose (CMC), esters of acetylcellulose the domestic and foreign proizvodstva.

As Policie use of chemically modified silica (SiO2), which, depending on how modifications can have a hydrophobic (Policy-P1), vfilename (Policy-DF), superfeminine (Policy-SF) properties.

Policy is a trademark of chemically modified silica (SIO, SIS2) (trademark "Policy", testimony 196999 from 06.12.2000 year).

Policy-P1 has a strong hydrophobic and organophilic properties, which means is a superfine powder on the basis of silicon dioxide, chemically modified organosilicon compound has a bulk density a 0.035-0.14 g/cm3particle size of 0.005 to 0.04 μm, specific surface area 300 m2/g, the effective contact angle for the surface-treated Policrom-P1 140-170othe operating temperature range of -60 to +180oWith the degree of hydrophobicity of 99% (THE 2169-001-0470693-93).

Policy-DF has the properties of a solid nonionic surfactants due to the chemical structure of the grafted surface layer possesses emulsifying properties, has a bulk density a 0.035-0.14 g/cm3particle size of 0.005 to 0.04 μm, specific surface area 300 m2/g, the effective contact angle for the surface-treated Policrom the-SF has superfeminine organopolymer properties is a fine chemically modified based powder of silicon oxide has a bulk density a 0.035-0.14 g/cm3particle size of 0.005 to 0.04 μm, specific surface area 300 m2/g, the effective contact angle for the surface-treated Policrom-SF, 90-120othe operating temperature range of -60 to +180oWith the degree of hydrophobicity of 40-50% (TU 2311-002-04706-93).

Chemically modified superfine powder brand Policy is chemically inert powder that will have no adverse impact on human health and the environment, in accordance with the "Primary Toxicological-hygienic passport new connection", approved by the RF Ministry of health, this class of materials is according to GOST 12.007-76 to the 4th class of low-hazard substances. Storage conditions of Policie: dry location at temperatures from -50 to +50oC.

Unlike the prototype of the proposed composition additionally contains a new component - chemical conversion of highly disperse silica mark Policy or its mixture with an aqueous solution of water-soluble polymer selected from the group of: polyacrylamide, cellulose ether, and mixtures thereof.

Depending on the brand of Policie, i.e., the method of surface modification of highly the suggested composition change filtration characteristics of reservoirs for water, and for oil.

Thanks to submicron particle sizes of the material used, by 2-3 orders of magnitude smaller average pore size of the collector, Policy any modifications easily penetrates into the bottomhole formation zone, changing energy surface (wettability) of the reservoir.

The proposed formulations containing hydrophobic modified additive of POLYSIL-P1, largely hydrophobizing the rock surface. Surfaces caused by reduced capillary pressure due to a change in wetting angle and surface tension.

For injection wells washed in the reservoir the reservoir is characterized by a significant polnostyu, and the edge angle of wetting less than the 90o. The hydrophobization of the surface rocks Policrom-P1 is the result of fixing it in pore volume due to the small size of its particles and due to forces of adhesion. Water is getting into the pore space, experiences a repulsive effect from the hydrophobic surface. As a result of this strength of intermolecular coupling at the interface liquid - solid surface weakens, and the resistance to movement of the water is reduced in proportion to the magnitude of the surface tension and edge the hydraulic resistance at the interface under the action of fluid pressure is observed hypermasculinity Rehbinder effect, leading to further expansion of the pore volume.

The admission of water into injection wells treated with the proposed composition is increased by reducing the resistance of the porous medium, channels and pores, through which pumped water at the expense of waterproofing, as well as the increase of pore sizes, i.e., the microstructure of the porous medium due to its wedging effect in the presence of hydrophobic material POLYSIL-P1.

Therefore, the proposed composition containing Policy-P1, has hydrophobic properties, which provides the surfaces of rocks and removes rychlovarnou produced water from previously adrenergenic or poorly drained intervals and zones of the reservoir.

In addition, after the injection of the proposed structure is tobitatsu clay particles, which are present in the reservoir, and as a result decreases the thickness of the hydrated membranes, which leads to an increase in the effective size of the pore channels.

As a result of application of the proposed formulations containing Policy-P1, at the expense of waterproofing reservoir rock and reduce the resistance to movement of water increases throttle response in the injection wells and producing wells reduce what was lysyl-DF. Due to the structure of the grafted surface layer POLYSIL-DF has the properties of a solid nonionic surfactant.

In the result of consolidation in the pore volume due to the small size of its particles and due to forces of adhesion Policy-AF dramatically reduces the surface tension at the phase boundary water-rock-oil, increasing permeability of the fluid.

Add POLYSIL-DF in the composition enhances the cleaning effect of the contaminated surfaces and leads to emulsification of the fat and oil pollution, dispersion and stabilization of the particles of solid impurities (ASPO).

The proposed formulations can contain Policy-SF, which has superfeminine organopolymer properties.

Add POLYSIL-SF in the proposed structure leads to the displacement of oil from poorly drained intervals, and also causes clogging of the aquifer channels by increasing the thickness of the hydrate shells.

The proposed compositions have a low viscosity and high stability at high temperatures, as contain alcohols, aliphatic, or aromatic, or products containing them. In conditions of high reservoir temperatures (100o(C) the role sup>oWith, glycerin (Tirol) 290oWith that contributes to the stability of the compositions. An important property of alcohols, especially glycols, and glycerin is their ability to lower the freezing point. Therefore, the proposed formulations containing glycols or glycerol, or products containing them, can be used for fishing in the cold season to prepare compositions. Application of organic antifreeze will allow to cook ice-free composition according to the proposed structure in terms of sub-zero temperatures.

Since the proposed composition has a low viscosity, therefore, to stabilize the composition of Policy can add, especially when adding a composition in high-viscosity oil when transporting them through pipes, mixed with an aqueous solution of water-soluble polymer selected from the group of: polyacrylamide, cellulose ether, and mixtures thereof, in amounts of 0.05 to 1.0 wt.% depending on the characteristics of the used polymers. The higher molecular weight polymer used, the lower its concentration in the composition.

Laboratory studies and field tests using the proposed formulations containing Policy confirmed its high efficiency.

Example 1. Gotostart 10 wt.% kerosene. In this solution under mechanical stirring, 25 wt.% sodium Las (sulfinol), 7.5 wt% of nonionic surfactants with 6-13 oxyethyl groups, monoalkyl esters of polyethylene glycol based on fatty alcohols fraction10-C13(sentinela DT-7), 2.5 wt.% polyoxyethylene alkyl ester of phosphoric acid (oxytoca KD-6), 30 wt.% polyglycol, 0.1-2.0 wt. % Of policie various modifications. Multicomponent mixture is thoroughly mixed until a homogeneous mass. Then pumped through a water-saturated core one pore volume of the proposed structure or prototype and three pore volume of the core of fresh water. The composition of the prototype represents the above composition without Policie (see tab.1).

For stabilization in the proposed structure add an aqueous solution of water-soluble polymer. As the use PAA PAA brands CS-141 (18 MM106and DP 9 8177 (5 MM106) made in Japan, esters of cellulose CMC-350, CMC-600 domestic production, a mixture of PAA brand CS-141 with CMC-350.

When the preparation of an aqueous polymer solution of 0.05 to 1.0 wt.% the dry polymer was added with stirring 9.0-9,95 wt.% the water and mix to a uniform consistency, then the solution add 0.1-2.0 wt.) - Rev. these core pumped one pore volume of the proposed composition and three pore volume of the core of fresh water (see table.3).

The core of stainless steel with a length of 220 mm and an inner diameter of 32 mm is filled with a mixture containing 95% quartz sand and 5% montmorillonite clay. Of the three main types of clay - kaolinite, hydrology and montmorillonite - with different degrees of swelling, as the clay component of the model was selected montmorillonite as having the greatest ability to swell. The model under vacuum saturated with water, the weight method to determine the initial permeability of the core by fresh water, which was 0,0313-0,0542 μm2(K1).

After pumping the proposed composition or prototype determine the water permeability (K2). Increased permeability (%) determined by the change of the core permeability on the water before and after pumping solution: K2/K1100%. The results of the filtration tests are presented in table. 1 and 3.

Example 2. Oil-driving ability of the emulsion is determined in terms of Tootmine of residual oil on the linear model for the homogeneous reservoir, representing the core of stainless steel with a length of 220 mm, an inner diameter of 32 mm, the core is filled with a mixture containing 95% quartz sand and 5% montmorillonite clay. The model under vacuum saturated with water, the weight of the dispute, until exit appears clean (without water) oil, determine the initial oil saturation, which amounted to 63.8-70,0%. In the filtration works use natural oil density 842 kg/m3and a dynamic viscosity of 8.5 MPawith the 20oC. the Initial displacement is performed with water (three pore volume) and determine the ratio of oil displacement by water.

To filter prepared above multicomponent mixtures proposed composition containing POLYSIL various modifications or its mixture with an aqueous solution of water-soluble polymer (see example 1). The composition of the prototype represents the above composition without Policie.

Through the core filter one pore volume of the proposed structure or prototype and three pore volumes of water, determine the growth rate and total fertility rate of oil displacement. The results of the filtration tests oil-driving ability are presented in table.2 and 4.

The data table. 1-4 show that with the introduction of the proposed composition of Policie or its mixture with a water-soluble polymer, there is an increase in the permeability of the core in comparison with the prototype 3.3-3.7 times (see tab.1 and 3), and the growth of oil displacement efficiency of the proposed composition is 15-20% higher than in the prototype.

When the content in the proposed composition of Policie less than 0.1 wt.% the increase in permeability and increase the displacement efficiency of oil differs little from the prototype, so the concentration of 0.1 wt.% Policie adopted for the minimum content in the composition. The upper limit of the content of Policie in the proposed structure (2 wt. %) due to the element of the adequacy of the achieved result, since the increase of Policie to 2.5 wt.% reduced the increase of permeability (see table.1 and 3) core and does not increase the displacement efficiency of oil (see table.2 and 4).

Hydraulic resistance was determined on tube rheometer open type with two calibrated parallel tubes. When moving through the pipes active high viscosity oils containing aqueous solutions of the proposed structure and composition of the prototype oil containing aqueous solutions proposed composition, showed a lower hydraulic resistance compared with the composition of the prototype.

Survey data are presented in table.5 and 6.

The effectiveness of preventing the formation of deposits (asphaltene-maloperation sediments) was determined by the number of deposits, which was postponed from the oil on the activity was determined by the formulawhere Mo is the mass of the sediments from a control sample (without additives composition); M is the mass of the sediments from the sample of oil with the additive composition.

Thus, the introduction of the modified dispersed silica mark Policy created a more General structure, which is due to the hydrophobization of the surface species and reduce the resistance to movement of water increases the permeability of the injection wells, and due to the high oil-driving properties increases emulsification, dispersion and stabilization of the particles of solid impurities (ASPO), and also leads to the displacement of oil from poorly drained intervals and cause blockage aquifer channels in producing wells.

The reagent Policy is unique and as a means of increasing the permeability and recovery injection wells with zero, weak and bystronicasia response. After treatment with compositions containing POLYSIL various modifications, dramatically increases throttle response by reducing the discharge pressure due to the greater permeability of the formation.

The proposed composition containing Policy, can be widely used to combat salt, hydrate and paraffin deposits in the tubing, to protect the object is x surfaces of pipelines, for fire fighting and other

Thus, technology for the use of fine materials brand Policy in the proposed formulations for enhanced oil recovery and enhanced oil recovery is a promising and effective.

A method of obtaining a composition for production and transportation of oil is simple, and consists in the fact that in the above multicomponent mixture of synthetic anionic (AS) and nonionic (nonionic surfactants) surfactants, polyoxyethylene alkylation phosphoric acid, a hydrocarbon solvent, aliphatic alcohol or aromatic alcohol, or products containing them, the number 98,0 to 99.9 wt.% add the dispersed silica mark POLYSIL need modification in the amount of 0.1-2.0 wt.% or its mixture with an aqueous solution of water-soluble polymer selected from the group of: polyacrylamide, cellulose ether, and mixtures thereof in amounts of 0.05 to 1.0 wt.%, thoroughly mixed and the composition is ready to use.

It is possible to prepare the proposed composition in an industrial environment that will help to avoid difficulties when cooking it in the cold season in field conditions, especially in Siberia and the Far North.

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Claims

1. Composition for production and transportation of oil containing multicomponent mixture of synthetic anionic (AS) and nonionic (nonionic surfactants) surfactants, polyoxyethylene alkylation phosphoric acid, a hydrocarbon solvent, aliphatic alcohol or aromatic alcohol, or products containing them, characterized in that it further contains an additive of the modified dispersed silica mark Policy in the following ratio, wt.%:

Multicomponent mixture of natural latex and synthetic, nonionic surfactants,

ethoxylated alkylation

phosphoric acid and a hydrocarbon solvent,

aliphatic alcohol, or

aromatic alcohol,

or products containing them 98,0-99,9

Policy 0,1-2,0

2. Composition under item 1, characterized in that in order to stabilize it contains a water-soluble polymer selected from the group of: polyacrylamide, cellulose ether, and mixtures thereof in amounts of 0.05 to 1.0 wt.%.

3. A method of obtaining a composition for production and transportation of oil under item 1, characterized in that in a multicomponent mixture of synthetic anionic (AS) and nonionic (nonionic surfactants) surfactants, ethoxylated alkyl ester is of FL, containing them, add the modified dispersed silica mark Policy or its mixture with an aqueous solution of water-soluble polymer selected from the group of: polyacrylamide, cellulose ether, and mixtures thereof.

 

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1 cl, 3 ex, 1 dwg

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