The composition for removing deposits asphaltoresinparaffin

 

(57) Abstract:

The invention relates to the field of oil production, in particular, compositions for removal asphaltoresinparaffin deposits (ARPD), and can be used to remove paraffin from the bottom-hole formation zone, flow lines, gathering collectors and oil field equipment oil-producing and oil-refining enterprises. The composition for removing deposits containing aliphatic and aromatic hydrocarbons, polar electrolit, nonionic and cationic surfactants, optionally contains a solvent - absorbent-And-2 heavy in the following ratio of ingredients,% vol.: aliphatic hydrocarbons 50-85, polar electrolit 2-5, nonionic surfactants 1-2, cationic surfactant 1-2, solvent - absorbent-And-2 heavy 7-22, aromatic hydrocarbons else. The technical result is an increase in the effectiveness of the composition on the destruction of the ARPD. table 1.

The invention relates to the field of oil production, in particular, compositions for removal asphaltoresinparaffin deposits (ARPD), and can be used to remove paraffin from the bottom-hole formation zone, flow lines, gathering collectors and oilfield equipment needoba limfaticheskie 45-85 and aromatic hydrocarbons 5-45, polar electrolit 1-15 and nonionic surfactant (nonionic surfactants) 0,5-6 [1].

However, this composition does not provide a high degree of removal of sediment and able to biodegradation under the influence of oilfield bacterial microflora.

Closest to the proposed technical solution to the technical essence and the achieved effect is a composition containing, vol.%: aliphatic hydrocarbons 25-85; polar electrolit 2-5; nonionic surfactants 1-2; cationic surfactants 1-2; aromatic hydrocarbons rest [2].

Solved by the invention, the goal is to increase the effectiveness of the composition on the destruction of the ARPD.

The problem is solved in that a known composition for removing deposits containing aliphatic and aromatic hydrocarbons, polar electrolit, nonionic and cationic surfactants, optionally contains a solvent - absorbent-And-2 heavy in the following ratio of ingredients,%:

Aliphatic hydrocarbons - 50 - 85

Polar elektrolit - 2 - 5

Nonionic surfactant - 1 - 2

Cationic surfactant - 1 - 2

Solvent - absorbent-And-2 heavy - 7 - 22

Aromatic hydrocarbons - Rest

aromatic hydrocarbons - nefras And 130/150 (GOST 10214-78);

- polar elektrolit - bottoms products of butyl alcohols production (TU 38.10216785);

- nonionic surfactant is ethoxylated alkyl phenol AF_9-12;

cationic surfactants (Quaternary ammonium salt base) - chloride alkyl(C₁₄-C₁₇)trimethylammonium;

- solvent - absorbent-And-2 heavy (TU 38.3039-88).

Solvent - absorbent-And-2 heavy is a byproduct of the production of synthetic rubber. Absorbent-And-2 heavy belongs to the class concentrates of aromatic and naphthenic hydrocarbons, and further comprises a heterocyclic nitrogen-containing compounds. The sample absorbent-A-2 is a dark brown liquid density at 20^oWith 0,937 g/cm³the temperature of the beginning of the boil 37^oWith the end of the boil 270^oFrom the distillation residue of 8%.

An example of the preparation of the proposed structure in the laboratory are discussed below.

In a flask with a capacity of 250 ml consistently pour in 1 ml of ethoxylated alkylphenol AF_9-12, 1 ml of chloride alkyl(C₁₄-C₁₇)trimethylammonium of matiabazarsento-And-2 heavy. Carefully mix the mixture by stirring until complete dissolution of the ingredients. Then the flask additionally add 85 ml of hexane. Close the flask with a glass stopper and mix the contents by shaking. Get solution with the following ratio of ingredients,% vol.: aliphatic hydrocarbon is hexane 85; aromatic hydrocarbon - nefras And 130/150 4; polar elektrolit - bottoms products manufacture of butyl alcohol 2; nonionic surfactant is ethoxylated alkyl phenol AF_9-121; salt of the Quaternary ammonium base - chloride alkyl(C₁₄-C₁₇)trimethylammonium 1 and solvent - absorbent-And-2 heavy 7.

Similarly there was the preparation of compounds with different ratio of ingredients (see table).

The inventive composition was tested to destruction efficiency patterns of sediment composition, wt. %: paraffins 43,7; silikagelevye resin 8,5; asphaltenes 8,4; solids 4,2 according to the following procedure.

To test a sample of sediment was stuffed in a plastic syringe with a diameter of 10 mm, squeezed and slapped obtained cylindrical shape ASPO weight of about 2, Then it was placed in a pre-weighted basket of cylindrical shape from the second basket was determined by the initial mass of sediment (m₀). Then the basket was placed in a sealed flask and poured composition mass ratio of paraffin:solvent 1:10. Kept at a temperature of 20^oC for 3 hours. After this time the basket was removed, placed in a desiccator. connected to a water vacuum pump. Produced drying of the sample ASPO at a residual pressure of 2-3 mm RT. Art. to constant weight. The difference of mass of the basket with paraffin and clean baskets were determined by mass remaining ARPD (m₁). The destruction efficiency of the structure ARPD (e, %) was calculated by the formula

E=(m₀-m₁)100/m₀, %.

The results are shown in the table.

The data in the table show that the introduction in the inventive composition is solvent - absorbent-And-2 heavy instead of nefras And 130/150 in the number of 7-22% vol. dramatically increases the efficiency of destruction of the structure of deposits, i.e., has a synergistic effect (effect samples 6, 8, 9, 14, 15). The synergy is confirmed by the relatively low efficiency of destruction paraffin compounds 1, 2, 3, 4, 5 (prototypes), which are based on aliphatic hydrocarbons and nefras And 130/150, compounds 11, 12, 13, which nefras And 130/150 completely replaced by the absorbent-And-2 heavy. Solamente, also not so effective against the destruction of ARPD.

Thus, the use of the claimed composition by 4-9% increased destructive ability in respect of deposits in comparison with the composition of the known prototype.

Sources of information

1. U.S. patent 4090562 And class. E 21 In 43/25, 23.05.78, "inventions of the world", vol. 81, 2, 1979

2. RF patent 2165953 C1, CL 09 TO 3/00, E 21 IN 37/06, BIPM, 2001, 12.

The composition for removing asphaltoresinparaffin sediments containing aliphatic and aromatic hydrocarbons, polar electrolit, neionoguenne and cationic surfactants, characterized in that it additionally contains a solvent - absorbent-And-2 heavy in the following ratio of ingredients, about. %:

Aliphatic hydrocarbons - 50 - 85

Polar elektrolit - 2 - 5

Nonionic surfactant - 1 - 2

Cationic surfactant - 1 - 2

Solvent - absorbent-And-2 heavy - 7 - 22

Aromatic hydrocarbons - Ostalnoe