Solid reagent for complex effects on asphaltoresinparaffin deposits in the extraction and transport of oil

 

The invention relates to the field of oil production, in particular to solid reagent complex impact on asphaltoresinparaffin deposits of sediment, and is designed to handle the infield and pipelines, mostly lined with polyethylene, for their comprehensive protection (simultaneous removal from the surface of sediment and prevent sediment asphaltoresinparaffin substances ASPV). The technical result is to make the reagent properties removal of deposits from the surface of the pipe, lined with polyethylene, while increasing it efficiency prevent sediment ASPV in these conditions, and in the stewardship of the reagent. Solid reagent powder contains technical cleanser TMS, including not less than 4.5 wt.% surface-active substances, at least 11 wt.% phosphoric acid salts in terms of P2About3and not less than 1.7 wt.% sodium silicate in terms of SiO2sultanol and polyacrylamide in the following ratio of ingredients, wt.%: TMS 60-75; sultanol 15-30; polyacrylamide - rest. To remove asphaltoresinparaffin sediments used in the form of 2-3% aqueous solution, and p is the reception of oil. 1 C.p. f-crystals, 4 PL.

The invention relates to the field of oil production, in particular to solid reagent complex impact on asphaltoresinparaffin deposits (ARPD), and is designed to handle the infield and pipelines, mostly lined with polyethylene, for their comprehensive protection (simultaneous removal from the surface of sediment and prevent sediment asphaltoresinparaffin substances ASPV).

Currently, there are no solid reagents comprehensive actions for the protection of paraffin pipes, lined with polyethylene.

Known liquid composition for cleaning asphaltenes, resins and waxes from metal surfaces with the following composition of ingredients, wt.%: the solvent 3,00-52,00; sultanol 0,25-2,50; soluble surface-active agent (surfactant) of 0.05-0.15, and water - other (see Author. mon. The USSR №1114687, CL 09 To 3/00, publ. 23.09.84 year).

Also known liquid composition for removing deposits containing, wt.%: non-ionic surfactant OP-7 or OP-10 16-35; sultanol 4,5-10,3 and aromatic solvent - rest (see RF Patent №2173328, CL 09 To 3/00, 1999).

The main disadvantage of known composition and the composition is nestabilnaja, after preparation of the composition for removing paraffin and delivery to the field and use is, as a rule, more than a month.

Another disadvantage of these known composition and the composition is their extremely low efficiency of removal of deposits from non-metallic surfaces and the lack of properties prevent the formation of deposits. I.e., these known compounds are not able to provide comprehensive protection from ASPO surfaces lined with polyethylene.

Closest to the proposed technical solution aggregative state is a composition for complex effects on the produced fluids containing powder technical cleanser TMS, including not less than 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 SiO2and two organic additives: phosphorous reagent HMB-1 or eddc and VAT residue production amines C17-C20in the following ratio of ingredients, wt.%:

Phosphate reagent HMB-1 or eddc 12-80

TMS 7-60

VAT residue production amines C17-C20Else

(see RF Patent №any lungs, medium and especially heavy oils, while a stable supply of inhibiting components in the produced fluids at all possible ratios of oil and water.

However, this known composition does not have a complex impact on ASPO, i.e. not simultaneously removing and preventing deposits, including surfaces lined with polyethylene. However, some ingredients (e.g., distillation residues from the production of amines17-C20are waste hazardous industries, and therefore, do not provide the environmental friendliness of the staff.

Technical result achieved offer solid reagent is giving him the properties of removal of deposits from the surface of the pipe, lined with polyethylene, while increasing it efficiency prevent sediment ASPV in these conditions.

Additional technical result consists in the stewardship of the reagent.

To achieve the technical result of the proposed solid reagent for complex effects on asphaltoresinparaffin deposits in the extraction and transport of oil containing powder technical cleanser ot for R2About5and not less than 1.7 wt.% sodium silicate in terms of SiO2and organic additives, the organic additives reagent contains sultanol and polyacrylamide in the following ratio of ingredients, wt.%:

TMS 60-75

Sultanol 15-30

Polyacrylamide Else

Offer solid reagent to remove asphaltoresinparaffin deposits, it is recommended to use 2-3% aqueous solution, and to prevent asphaltoresinparaffin sediments is recommended to place it in a perforated container, washed oil.

The achievement of the technical result was made possible thanks to the joint effects within the proposed reagent ingredients. For example, due to the combined effects of TMS and sulfinol, ASPO will be easily and completely removed with a plastic surface, probably due to the high penetrating ability of the molecules of these substances into the crystal lattice of the sediments and by the same organic nature “surface - substance”, resulting on the surface of the polyethylene will be adsorbed protective film, adhesion to the surface of the paraffin crystals and the presence of the receipt of the proposed reagent in laboratory conditions were used the following substances:

powder technical cleanser (TMS) (TU 2499-019-04643756-96);

sultanol-Las sodium on THE 2481-159-00209645-99 with the concentration of the basic substance is not less than 80%, powdery substance yellowish;

polyacrylamid (PAA) stamps: Praestol 2530, TV, 2540 beyond 2216-001-40910172-98; anionic acrylamide polymer AK-642 on THE 6-02-00209-912-65-99;

water technical;

water produced with a density of from 1,005 to 1,170 g/cm3.

Enablement of the claimed invention is confirmed by the following example:

Example. To obtain the claimed solid reagent in the laboratory took 0.6 g TMS; 0.3 g sultanol and 0.1 g of PAA. A powder mixture was stirred and received the inventive reagent.

When lab tests were defined:

the degree of dissolution of the inventive solid reagent in waters of different density;

the degree of removal of deposits from plastic and metal surfaces offer a reagent;

the washing ability of the proposed reagent for removal of deposits;

the effectiveness for preventing deposition of paraffin.

Testing the solubility of the inventive solid reagent held in the traditional way, namely by opagent (1, 2 or 3 g) were placed in a conical flask with water of various degrees of mineralization. Prepared thus 1-, 2 - and 3% aqueous solutions, conducted a visual observation of the degree of dissolution of the inventive solid reagent. To accelerate the dissolving of the proposed solid reagent in the water is allowed to heat up to 60C. These tests were necessary to determine the optimal concentrations of aqueous solutions of reagent used to remove paraffin.

The degree of dissolution of the inventive solid reagent in fresh and produced water of different density are shown in table 1.

The data in table 1 show that the inventive solid reagent dissolves in fresh and brackish water with a density of up to 1,010 kg/cm3, water in a concentration of 2-3%, so the reagent solution of this concentration is the predominant when the removal of sediment.

Further, in laboratory tests determined the ability of the inventive 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 inventive reagent, and the effectiveness deleted the rank of the variance of deposits in an aqueous solution of the inventive reagent;

the slush and puttying the surface of the paraffin in the aqueous solution of the reagent;

to launder bulb from ASPO.

During the tests used ASPO of Kazanskogo, Almassora and elkhovskogo fields. More detailed characteristics used in studies of sediment are shown in table 2.

The data obtained in the studies on detergency of the inventive reagent are shown in table 3.

The data of table 3 show that the inventive solid reagent when the content of 60-75 wt.% TMS, 15-30 wt.% sultanol and 10-15 wt.% PAA provides when using the effective removal of various types of deposits (washout of sediment from the walls is 85-100%, which is 15-20% more efficient than the prototype).

In laboratory tests determined the degree of removal of deposits with a polyethylene surface offered by the reagent. This took polyethylene samples that had previously degreased and weighed. Then they were layered deposits, was dried for 2 hours and again weighed. After that, the samples were placed for 4 hours in an aqueous solution of reagent 2% concentration, and then dried 16 hours at a temperature of 20C and weighed. According to the difference of the scales was determined by the degree of washing of the reagent provides high efficiency removal of deposits on 90-93% with polyethylene surfaces.

The same research was conducted on the steel plates, which simulated pump-compressor pipe. Data to launder deposits with metal plates offered by the reagent have the same results in terms of efficiency, as the washing of paraffin polyethylene samples. Thus, the proposed solid reagent can be recommended for use in producing wells, equipped with a metal pipe, and flow lines and pipelines, lined with polyethylene.

In laboratory tests also determined the effectiveness of the proposed and known solid reagent to prevent deposition of paraffin on the surface of the polyethylene sample. For this low fat, dried and weighed polyethylene samples were placed in a mixture of an aqueous solution of the solid reagent, saturated with paraffin at 50C, and kept for 4 hours. Then they were taken out, dried, weighed and the degree of deposition on the precipitate was determined relative effectiveness in preventing deposition of paraffin.

The results showed that the proposed solid reagent provides high efficiency for preventing the deposition of paraffin, which is 10-to in field conditions it is recommended to apply it in the form of an aqueous solution of 2-3% concentration for leaching wells and pipelines from ASPO, and delivery in a perforated container for preventing from deposits ASPV.

The application of the proposed solid reactant will increase the efficiency of paraffin control in plastic and metal piping, and increase the turnaround time of the period of the wells and the throughput of pipelines, and will increase the profitability of wells.

In the preparation of the inventive reagent with environmentally friendly components produced at the present time on the territory of Russia.

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 of his craft.

Claims

1. Solid reagent for complex effects on asphaltoresinparaffin deposits in the extraction and transport of oil containing powder technical cleanser TMS, including not less than 4.5 wt.% surface-active substances, at least 11 wt.% phosphoric acid salts in terms of P2About3and not less than 1.7 wt.% sodium silicate in terms of SiO2 is l and polyacrylamide in the following ratio of ingredients, wt.%:

TMS 60-75

Sultanol 15-30

Polyacrylamide Else

2. Solid reagent under item 1, characterized in that the removal asphaltoresinparaffin sediments used in the form of 2-3% aqueous solution, and to prevent asphaltoresinparaffin deposits - by placing in a perforated container beneath the oil.

 

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