Solid reagent to remove asphaltoresinparaffin deposits in the extraction and transport of oil and the method of removing deposits asphaltoresinparaffin

 

The invention relates to the oil industry, and in particular to solid reagents-removers asphaltene precipitation and to a method of processing the above-mentioned remover oil wells, infield and pipelines to remove asphaltoresinparaffin deposits (ARPD). The technical result is to increase the dissolving ability of the reagent, while improving its maintainability, stability over time and environmental factors, as well as in the expansion of the range and cheap raw material base of reagents for removal of deposits. Solid reagent to remove asphaltoresinparaffin deposits in the extraction and transportation of oil, including powder technical detergent, synthetic detergent, containing not less than 12 wt.% surface-active substances, at least 10.5 wt. % phosphoric acid salts in terms of P2O5and at least 2 wt.% sodium silicate in terms of SiO2contains powder technical detergent comprising at least 4.5 wt.% surface-active substances, at least 11 wt.% phosphoric acid salts in terms of P2O5and not less than 1.7 wt.% sodium silicate in terms of SiO2when slew the method of removing asphaltoresinparaffin deposits in the extraction and transport of oil by treatment with an aqueous solution of the reagent on the basis of a mixture of surface-active substances, as a reagent on the basis of a mixture of surfactants use solid reagent containing powdered synthetic detergent, including not less than 12 wt.% surface-active substances, at least 10.5 wt.% phosphoric acid salts in terms of P2O5and at least 2 wt.% sodium silicate in terms of SiO2and powder technical detergent comprising at least 4.5 wt.% surface-active substances, at least 11 wt.% phosphoric acid salts in terms of P2O5and not less than 1.7 wt.% sodium silicate in terms of SiO2when the following ratio of ingredients, wt.%: synthetic detergent 20 - 30; technical cleanser 70 - 80, and the processing of the well or pipeline is carried out in an aqueous solution of the specified reagent 1-2% concentration. For better implementation of the proposed method is recommended for preparation of an aqueous solution of reagent to use fresh or brackish water. 2 S. and 1 C.p. f-crystals, 3 tables.

The invention relates to the field of oil production, in particular to solid reagents-removers asphaltene precipitation and to a method of processing the above-mentioned remover oil wells, EXT is.

There are currently no effective enough solid reagents to remove and dissolve the deposits, consisting of cheap, widely produced by domestic industry, environmentally safe components.

Most known solvents ARPD have a liquid consistency and quite expensive. The paraffin removers usually are ready-made aqueous solutions, the use of which requires additional costs associated with their transportation, which is especially difficult in low temperatures.

Known composition for washing asphaltenes, resins and waxes from metal surfaces with the following contents of the ingredients (wt.%): Solvent - 3,00-52,00 Sultanol - 0,25-2,50 Soluble surfactant 0.05 to 0.15 Water - other (see RF Patent 1114687, CL 09 To 3/00, publ. 23.09.1984 year).

This known composition has a liquid consistency.

Method of making this known composition and is reduced to a thorough mixing of its ingredients.

The main disadvantage of this known structure is unstable physical condition, and it relatively quickly settle out during storage. And the conditions of production are such that prigotovleniya.

In addition, the known composition is quite expensive, requires additional costs for transportation of water, which is part of, and not effectively removes paraffin.

The closest to the technical nature of the claimed method is a method of removing paraffin, according to which make processing of metal surfaces (in the well or pipeline) aqueous solution of the composition based on a mixture of surfactants (see RF Patent 1114687, CL 09 To 3/00, publ. 23.09.1984 year).

The closest to the technical nature of the claimed reagent is a composition for complex effects on the produced fluids containing the following ingredients (wt.%): Phosphate reagent HMB-1 or eddc - 12-80 Technical cleanser - 7-60 VAT residue production of amines With17-C20- The rest (see RF Patent 2131969, CL E 21 In 37/06, publ. 20.06.1999 year).

The disadvantage of this structure is its lack of dissolving ability. Moreover, due to the complexity of this specified well-known composition preparation method is too simple.

Along with these ingredients (e.g., distillation residues from the production of amines With17-C20are harmful waste is on reagent for removal of deposits, the aim was to increase its solvent capacity while maintaining its maintainability and stability for a long time and stewardship.

An additional task was to increase the range and cheap raw material base of reagents for removal of deposits.

To obtain this result, the solid reagent to remove asphaltoresinparaffin deposits in the extraction and transportation of oil, including powder technical detergent, synthetic detergent, containing not less than 12 wt.% surface-active substances, at least 10.5 wt.% phosphoric acid salts in terms of P2About5and at least 2 wt. % of sodium silicate in terms of SiO2contains powder technical detergent comprising at least 4.5 wt.% surface-active substances, at least 11 wt.% phosphoric acid salts in terms of P2O5and not less than 1.7 wt. % of sodium silicate in terms of SiO2when the following ratio of ingredients (wt.%):
Synthetic detergent - 20-30
Technical cleanser - 70-80
The achievement of the technical result is made possible by the introduction of the reagent portview included in the proposed reagent ingredients.

In the claimed invention is a method of removing paraffin, the aim was to improve its effectiveness for the removal of sediment, while improving manufacturability of the process.

To achieve the mentioned technical result in the removal method asphaltoresinparaffin deposits in the extraction and transport of oil by treatment with an aqueous solution of the reagent on the basis of a mixture of surface-active substances, as a reagent on the basis of a mixture of surfactants use solid reagent containing powdered synthetic detergent, including not less than 12 wt.% surface-active substances, at least 10.5 wt.% phosphoric acid salts in terms of P2About5and at least 2 wt. % of sodium silicate in terms of SiO2and powder technical detergent comprising at least 4.5 wt.% surface-active substances, at least 11 wt.% phosphoric acid salts in terms of P2About5and not less than 1.7 wt. % of sodium silicate in terms of SiO2in the following ratio of ingredients (wt.%):
Synthetic detergent - 20-30
Technical cleanser - 70-80
and processing of wells or pipelines carry water reagent solution 1-2%-NGO reagent solution to use fresh or brackish water.

The efficiency of removal of deposits of the proposed method is provided for the activity used solid reagent, and due to the increased temperature of the aqueous solution, as its dissolution is accompanied by heat.

To implement the proposed method in field conditions perform the following operations in the following sequence:
- prepare a solid reagent on the basis of a mixture of surfactants, which are mixed powder CMC and TMC in the ratio of 20-30 wt.% and the rest wt.% respectively;
next on the water, mainly fresh or brackish, prepare a water solution of the solid reagent 1-2% concentration;
- prepared aqueous solution is injected into the borehole;
- then hold washing. Time and technology of leaching is determined by the extent waxing is produced equipment: you can make the tub, you can run the well "on", can be limited to a single filling of the well volume aqueous solution of the proposed structure.

To obtain the claimed reagent in laboratory conditions were used the following materials:
- powder technical cleanser (TMS) (TU 2499-019-04643756-96);
- powdered with the organization of the proposed method used:
- water technical
water produced with densities up to 1.005 g/cm3.

The possibility of implementing the claimed invention is confirmed by the following example.

Example. To obtain the claimed solid reagent in the laboratory took 0.7 g TMS and 0.3 g of CMC. The mixture was stirred. Next, to this mixture was added to 99 g of technical water, receiving water solution of reagent 1% concentration, which was dissolved paraffin.

When laboratory testing were identified:
the degree of dissolution of firm reagent in waters of different density;
- ability of the proposed reagent for removal of deposits.

Tests also aim was to establish the boundary and the optimal values of the ingredients in the proposed reagent and water solution used to implement the inventive method.

Testing the solubility of the solid reagent held in the traditional way, namely, by determining the degree of dissolution of various substances. It consists in the following.

Sample firm reagent (1, 2 or 3 g) were placed in a conical flask with water. Prepared thus 1, 2 and 3% aqueous solutions, conducted a visual observation of the degree of RA is lowered her heated to 60oC.

The degree of dissolution of firm reagent in fresh and produced water of different density are given in table. 1.

The data in the table. 1, show that the claimed solid reagent dissolves in fresh and brackish low density 1,005 kg/cm3water at a concentration of 1-2%.

When using water with higher density than 1,005 kg/cm3for the preparation of an aqueous solution of the solid reagent and its concentration in solution >2%, there is a loss of flocculent precipitate, which leads to loss of active properties of the solution.

Further, in laboratory tests determined the ability of the claimed solid reagent used in the implementation of the proposed method and the ultimate and optimal ratios of ingredients in it.

The cleaning ability of the claimed reagent, and the removal efficiency of sediment proposed method was determined by the following indices.

1. To launder the oil film.

2. Largest dispersion of sediment in aqueous solution claimed reagent.

3. The slush and puttying the surface of the paraffin in the aqueous solution of the reagent.

4. To launder bulb from ASPO.

When conducting ispytatelei used in studies of sediment are given in table. 2.

The data table. 3, obtained in the course of the research show that the claimed solid reagent for removal of sediment when the content of 20-30 wt.% CMC and 70-80 wt.% TMS provides when using it as a 1-2% aqueous solution in the proposed method, the effective removal of various types of deposits (washout of sediment from the walls is 90-95%, which is 12-18% more efficient than the known.

In the preparation of the claimed reagent used a cheaper, environmentally safe components produced at the present time on the territory of Russia. All incoming stated in the reagent components are the third class of danger, all of them are safe and widely used in everyday life. The prototype also contains ingredients that have a higher hazard class.

Solid state proposed reagent provides high stability and high processability when used, it allows to increase the shelf without modifying properties, and ease of delivery Providence.

And due to the fact that in the proposed method uses an aqueous solution of the solid reagent, prepared in produced water (fresh or brackish), provides high technology iza the exothermic reaction of dissolution in water when carrying out the inventive method, more efficient removal of deposits.


Claims

1. Solid reagent to remove asphaltoresinparaffin deposits in the extraction and transportation of oil, including powder technical detergent, synthetic detergent, containing not less than 12 wt.% surface-active substances, at least 10.5 wt.% phosphoric acid salts in terms of P2O5and at least 2 wt.% sodium silicate in terms of SiO2, characterized in that the reagent contains powder technical detergent comprising at least 4.5 wt.% surface-active substances, at least 11 wt.% phosphoric acid salts in terms of P2O5and not less than 1.7 wt.% sodium silicate in terms of SiO2in the following ratio of ingredients, wt.%:
Synthetic detergent - 20 - 30
Technical cleanser - 70 - 80
2. Method of removing asphaltoresinparaffin deposits in the extraction and transport of oil by treatment with an aqueous solution of the reagent on the basis of a mixture of surface-active substances, characterized in that the reagent-based surfactants use solid reagent containing powdered sin is but-acid salts in terms of P2O5and at least 2 wt.% sodium silicate in terms of SiO2and powder technical detergent comprising at least 4.5 wt.% surface-active substances, at least 11 wt.% phosphoric acid salts in terms of P2O5and not less than 1.7 wt.% sodium silicate in terms of SiO2when the following ratio of ingredients, wt.%:
Synthetic detergent - 20 - 30
Technical cleanser - 70 - 80
as well treatment or pipeline carried out in an aqueous solution of the specified reagent 1-2% concentration.

3. The method according to p. 2, characterized in that for the preparation of an aqueous solution of reagent is used fresh or brackish produced water.

 

Same patents:
The invention relates to the oil industry and can be used in process operations when removing wax and paraffin deposits and the decrease of the removal of rock particles from the bottom zone

The invention relates to the oil industry and can be used to remove asphaltoresinparaffin sediments from the bottom-hole formation zone, oilfield equipment, pipelines and tanks

The invention relates to neftedobyvajushhego industry, and in particular to methods of treatment of bottom-hole zone of the well, is complicated by the loss of asphaltoresinparaffin deposits deposits

The invention relates to the oil industry and can find application in the production of sealed capsules for treatment of oil and gas wells

The invention relates to the oil and gas industry and is intended to prevent hydrate formation in wells, predominantly oil drilled in permafrost (MMP)

The invention relates to the oil industry and can be used to restore and enhance productivity in water-cut oil wells, bottom-hole zone and oilfield equipment which is locked asphalt, resin and paraffin deposits

The invention relates to the oil industry and can be used to remove asphaltoresinparaffin deposits (ARPD) of oilfield equipment, pipelines and tanks

The invention relates to the oil industry, mainly to the development of deposits of paraffin oil with the use of chemicals for removing and preventing deposits maloperation

The invention relates to the oil industry and can be used to remove asphaltoresinparaffin, resin and paraffin deposits from oil-field equipment, wells and bottom-hole formation zone

The invention relates to the oil industry and can be used in the treatment of bottom-hole zone of the well

FIELD: oil and gas production.

SUBSTANCE: invention is intended to protect inner surface of transmission pipelines against asphalt-tar-paraffin deposits and provides appropriate composition containing 0.5-10% polyvinyl alcohol, 0.01-1% nonionic surfactant (FK 2000 PLUS), and water.

EFFECT: prolonged pipeline protection effect of composition and manifested demulsification activity.

1 dwg, 5 tbl, 5 ex

FIELD: oil and gas production and corrosion protection.

SUBSTANCE: composition according to invention, which can be used for asphaltene-tar-paraffin deposits from bottom zone of formation, discharge pipes, oil-collection reservoirs, and oil-field equipment, contains 1-5 vol % nonionic surfactant: oleic acid, С912-alkyl-phenol, С910-alkyl-phenol, or N-alkyl-3-methyl-5-ethylpyridinum bromide in solvent; 1-5% cationic surfactant: product of reaction of primary and secondary aliphatic amine mixture with industrial-grade dimethyl phosphite; and solvent (Absorbent A) in balancing amount. Composition can also be based on straight-run gasoline containing in this case 10 to 50 vol % Absorbent A.

EFFECT: increased cleaning efficiency in combination with anticorrosive effect and reduced expenses on reagents.

2 cl, 3 tbl, 23 ex

FIELD: oil extractive industry.

SUBSTANCE: compound includes organic acidic reagent and cubic remains of amine production C17-C20, and as organic acidic reagent contains sulphamine acid with following ratio of components in percents of mass: sulphamine acid 20-70, C17-C20 the rest or mixture of sulphamine acid with nitriletetramethylphosphone acid with following ratio of components in percents of mass: sulphamine acid 10-40, nitriletetramethylphosphone acid 25-70, C17-C20 the rest.

EFFECT: higher efficiency.

2 ex, 7 tbl

FIELD: oil and gas extractive industry.

SUBSTANCE: method includes examination of operation well for gas-condensation and periodical cleaning of face-adjacent well area from precipitating hydrocarbon condensate by pumping hydrocarbon condensate solvent into bed, exposure of well for period of condensate dissolution and following removal of received solution from face-adjacent area during well launch, as solvent binary mixture is used with unlimited mutual solubility of components, while at least one of them has unlimited mutual solubility with hydrocarbon condensate, and relation of binary mixture components is determined from previously built phase diagram of three-component system, formed during dissolution of hydrocarbon condensate. As binary mixture with unlimited mutual solubility of components a mixture of acetone and methanol is used, or chloroform and methanol, or chloroform and aniline, or chloroform and acetone.

EFFECT: higher productiveness.

2 cl, 3 ex, 6 tbl, 2 dwg

FIELD: oil and gas industry.

SUBSTANCE: method includes injection of processing liquid into bed, which liquid contains solved or dispersed in water complicated ether and polymer destructor, selected from oxidizing destructor and ferment destructor in such a way, that complicated ether is hydrolyzed with production of organic acid for solution of material soluble in acid, present in filtering layer or adjacent to it or in other damage in productive bed, and polymer destructor destroys polymer material, present in filtering layer or bio-film in productive bed.

EFFECT: higher efficiency, simplified method, higher productiveness, higher ecological safety.

31 cl, 1 tbl, 1 ex

FIELD: oil industry.

SUBSTANCE: compound has processed cyclohexane fraction, processed tallic or rapeseed oil, additionally has modified high-dispersion polysyl-grade silica with following ratio of components in percents of mass: processed cyclohexane fraction 69.9-78.0, processed tallic or rapeseed oil 20.0-30.0, polysyl 0.1-2.0.

EFFECT: higher efficiency.

3 ex, 4 tbl

FIELD: oil industry.

SUBSTANCE: composition for prevention of asphalt-resin-paraffin precipitations on basis of liquid pyrolysis products, used in amount of 0.03-0.05 of oil mass, has following composition, %: dark oil polymer resin, received by oxidizing polymerization of heavy pyrolysis resin during blowing of air with flow 17-23 hour-1, temperature 145-155°C in presence of cobalt salts during 2-2.5 hours, 30-35, alkylaromatic hydrocarbons 65-70.

EFFECT: higher efficiency.

3 ex, 3 tbl

FIELD: oil and gas production industry, particularly for well thawing.

SUBSTANCE: method involves lowering flushing pipe string of lesser diameter into producing tube; flushing well bore with hot technological solution and lengthening flushing pipes as hydrate ice block damages, wherein potassium chloride electrolyte is used as the technological solution.

EFFECT: increased reliability and efficiency.

FIELD: oil industry.

SUBSTANCE: method includes washing tubing pipes using solvent - condensed light hydrocarbons, produced using centrifugal forces of hydraulic cyclone, with insertion of it through behind-pipe space into said tubing columns and circulation with down-pump operating in towards-self mode. Said solvent contains admixture in form of special surfactant, washing is performed at temperature close to temperature of melting of paraffin with loss of said solvent 5-10 m3 in one well.

EFFECT: higher efficiency, broader functional capabilities.

FIELD: oil and gas production.

SUBSTANCE: reagent contains fraction obtained in processing of liquid products from oil feedstock pyrolysis via rectification of these products within a temperature range of 28 to 150°C at atmospheric pressure and in presence of polymerization inhibitors; and optionally polyalkylbenzene resin in amount 0.5-5.0% separately or in mixture with α-olefin 2.0-8.0%), or with anionic surfactant (0.05-0.2%). Reagent may also further contain 0.5-5.0% α-olefins and 4.0-10.0% butylbenzene fraction. Method of treating well bottom zone comprises injecting hydrocarbon fluid containing above-indicated hydrocarbons, forcing it into formation with buffer liquid, holding it in bottom zone for a wale, and drawing off dissolution products.

EFFECT: enhanced dissolution of asphaltene-tar-paraffin deposits on oil-field equipment and in well bottom zone and prevented re-precipitation of asphaltenes.

EFFECT: 5 cl, 3 tbl

Up!