SU1465547A1 - Composition for preventing paraffin and hydrate in oilfield equipment - Google Patents

Abstract

The invention relates to the oil and gas industry and mb used in the extraction, preparation and transportation of gas oil and gas condensate mixtures of paraffin deposits. The purpose of the invention is povener. inhibiting ability of the composition and lowering the temperature of formation of paraffin-hydrate complexes. The composition includes surfactant and molasses one stripped off of the post-yeast bard in the following ratios, wt.%; Surfactant 1-5; the molasses is evaporated after the yeast bard 95-99. As the surfactant used apkilaryl sulfonates, ethoxylated phenols. The molasses 1I is stripped of the postpartum bard - alcohol waste production is a syrupy liquid, has a density not lower than 1.205 g / cm, the pour point is minus 29 - 30 ° C, well soluble in alcohols, glycol x, non-toxic, non-explosive. The composition with the known one provides an increase in the effectiveness of preventing paraffinic hydration by 44-45% and a decrease in the temperature of formation of paraffin-hydrate complexes. This allows to reduce the cost of cleaning the field equipment, stabilize the processes of extraction and transport, and reduce energy costs. 1 ZP. F., 4 tab. c (L 4:; s O5 SP ate

Description

The invention relates to the oil and gas industry and can be used in the extraction, preparation and transportation of gas-oil and gas-condensate mixtures of paraffin deposits.

The aim of the invention is to increase the inhibiting ability of soy-gawa and lower the temperature of formation of paraffin-hydrate complexes.

The composition for preventing paraffin-dressing in the field equipment includes surfactants and molasses one stripped off after the yeast bard in the following proportions of components, wt. X:

PAV1-5

Molasses

aftermath

bard.95-99

As a surfactant, alkyl aryl sulphonates are used, used as a component of detergents, in secondary methods of oil production, also when pumping high-water flooded oils.

The reagents are homogeneous colored liquids with a density of 1.1-1.2 g / cm3 with a pour point of 1-3 ° C. Reagents contain at least 45% of the active substances, are well soluble in water, have a high foaming, emulsified properties are non-toxic, non-fire hazardous.

In the experiments, the following surfactants were used:

DS-PAC - sodium sapky apkylaroatonic sulfonic acids based on kefosin and gas oil fractions

С „Н ,, -, ArSOjNa,

/

where n 8-12;

sulfonol n trimonoalkylbenzene-kerosene-based sulfonates

SpN2 ,,, SbN, 50zNa

where n 12-18;

vslgonat - natrniyalkansulfonat

(Spn

.y.b..CtnH ,,) CHS03Na

where n + m 11-17;

SP-10 is a monoal kilo phenyl ester of polyethylene glycol based on polymer distillate

. SpNap., (CbH40) 1pN

where n 8-10; m 10-12 ;; J

Alkamon DS - alkoxymethylmethyl diethylammonium methyl sulfate

(SPN 2 ,, N + OSI (SI h) (,} I

/ (SNZZO, :), where p 10-18.

 Mellard one stripped off of the post-yeast bard (MUSSB) is a waste of alcohol yeast production. The peg- agent has a density not lower than 1,205 g / cm, the pour point is 29-ZO С, it is well soluble in water, alcohols, glycols, non-toxic, non-explosive. The commercial product is released in the form of a dark-colored syrup-like liquid, characterized by mass addition of natural ashes in terms of absolutely dry

substance 40-50%, organic components include betaine 10.1%, glycerin 1.4%, lactic acid 1.25%, glycolic acid 1.07%, amino acids 2.5%, organic colloids 12.1%, etc.

Table 1 presents data illustrating the composition to prevent paraffin-hydrated sedimentation and the reduction of the temperature of formation of sediments.

Table 2 shows the protective effect of the composition with different water content of oil and gas condensate.

Table 3 presents data showing the effectiveness of a composition with various surfactants in a gas condensate environment (Rev. 1) –Water (40:60).

Example 1. A mixture consisting of 40% oil and 60% of paste water (100 g in total) is poured into a steel cylinder with a stirrer. A known composition (O, .5% alkylaryl sulfonate + 99.5% dystily glycol) is fed at the rate of 1000 mg / l of water (60 mg). The cylinder is placed in a cooling bath with a temperature of + 3 ° C. Stir the mixture at this temperature for 20 minutes, after which the mixture

five

0

45

gg

 The cups are stopped and determined by a gravimetric method the amount of deposits in the cylinder.

In parallel, under similar conditions, a control experiment was carried out without the addition of a reagent.

Taking the amount of deposits in the control experiment as 100%, the effectiveness of preventing deposits in the experiment with a known composition is determined. It was established that the number of lacunae in the control experiment and in the experiment with the izvest of the first compound is the same, no inhibitory effect is observed.

EXAMPLE 2. The experiment was carried out analogously to example 1.

To the water / oil mixture is added an MUHB in the amount of 60 mg (at the rate of 1000 mg / l of water). The protective effect of the reagent is 72.1% compared with the control experiment without the reagent.

Example 3. The experiment is conducted

similar to example 1.

The composition (0.5% alkylaryl sulfonate + 99.5% muRB) is added to the water / oil mixture in the amount of 60 mg-10

15

shield effect of sediment composition 82%.

Determining the effectiveness of preventing paraffin-hydrated deposits in a gas-saturated water-gas-condensate mixture is carried out in a chamber with a mixing device.

Example 4, 60 g of paraffin condensate and 90 g of water are loaded into the chamber. 90 mg of a known composition (0.5% alkyl triphosphonate + 99.5% diethylene glycol) are also added. Natural gas is supplied to the chamber to a pressure of 5.0 MPa, the temperature is lowered to + 5 ° C and the mixture is kept at this temperature for 7–10 min. Then the gas pressure in the chamber is reduced, the liquid phase is drained and the amount of deposits is determined.

In parallel, a control experiment was carried out without the addition of a reagent. The protective effect of the known composition in comparison with the results of the control experiment is 45%.

EXAMPLE 5 The experiment was carried out analogously to example 4.

An mUHB is added to the water condensate mixture in an amount of 90 mg. The paraffin-hydrate sediment effect is 75%.

For example, the test is carried out similarly to test 4.

The composition (5% alkylaryl sulfonate - - H-95 MUHB) is added to the condensate water mixture in an amount of 90 mg. Protective action against sediment 100%.

EXAMPLE 7 The experiment was carried out analogously to example 4.

The composition is added to the condensate water mixture (40% apkilaryl sulfonate + 90% MPB). Protective action against sediment 100%.

Example The effect of the composition developed on the tem- perature of the onset of formation of paraffin hydrates is determined.

20

25

thirty

45 50

35

Paraffin gas condensate is loaded into the chamber with 60 g, water with 90 g and 50 g of the composition (0.5% apkylaryl sulfonate + 99.5% MTBF). Natural gas pressure of 5.0 MPa is created and the temperature of the mixture is lowered with constant stirring until the formation of paraffin-hydrate deposits. Paraffin-hydrate formation temperature +7 С

PRI me R. 9. The experiment was carried out analogously to example 8.

0

five

40

20

25

A composition of 1.0% alkyl-aryl sulfonate and 99% is used. The temperature of the images rs paraffin-hydrate complexes +4 C.

Example 10. The experiment was carried out analogously to example 8.

Apply an MBMF without adding surfactant to it. Paraffin hydrate formation temperature.

Example F, The test was carried out analogously to example 8. A known composition was used (0.5% alkylaryl sulfonate and 99.5% diethylene glycol). The temperature of formation of paraffin complexes +6 C.

As a result of the experiments, it was established that the joint introduction of surfactant and MUHB into a gas-rich mixture containing paraffinic hydrocarbon feedstock and water increases the efficiency of protection of field equipment from paraffin-hydrate deposits and decreases the temperature of the start of formation of paraffin-hydrate complexes. This is due to the penetration of the mechanical elasticity and durability of the protective film as a result of the joint formation of a wall 30 layer of adsorbed surfactant molecules blocked by amino acid polymerization products, organic colloids, batain, acids and other organic compounds that make up the molasses arena bards.

Compatibility of the mUHB and surfactants on the newly formed surface of germinal crystals is apt to involve their active components in the composition of paraffin-hydrate complexes. The MMSB has a positive effect on the structure of crystalline hydrates and reduces the temperature at which they form, Cri 45 jointly present surfactants and MTBF by reducing intermolecular bonds in the composition of the aggregates, the temperature of their formation decreases and the structure becomes friable. 50Analysis of experimental data

shows that the most effective is a composition containing surfactants of the type of alkyl aryl sulfonates, which seems to be explained by their higher hydrophysing action.

The results of the study show that the proposed composition, unlike the known one, prevents deposits in water-oil 35

The medium, tse and exhibits a higher protective e (}) effect from deposits in a water-condensate medium, the temperature of formation of paraffin-hydrate deposits in the presence of danp composition is lower than that of the known.

The content of MBMB below 95 mACo leads to an increase in the temperature of formation of paraffin-hydrate complexes. In terms of its content above 99%, it gives a decrease in the preset effect of paraffin-hydrate sediments.

A vent to prevent paraffin-deposited deposits in your equipment can be used with the help of well-known technological methods, for example, by constant metering into the well, pipeline Ш1И heat exchanger or by periodically feeding the composition to the system.

Thus, the previous one-to-one composition provides, in conjunction with izvatTt-ymy, an increase in the efficiency of the paraffin-hydrate, which is 44-45% delayed and a decrease in the rate of formation of the paraffin-hydrated Hjjix catfish, which reduces the cost of cleaning and cleaning, and the cleaning cost of cleaning the product, as well as reducing the cleaning costs. to stabilize

4655478

sy mining and transport, reduce energy costs.

Claims (1)

Investigations were carried out using paraffinic oils from gas condensates, the characteristics of which are given in Table. 4. The invention formula 0.1. The composition of DOI to prevent paraffin-hydrate deposits in field equipment, containing surfactants, is characterized in that, in order to increase the inhibitory capacity and reducing the temperature of formation of paraffin-hydrate complexes, it additionally contains 1 molasses one stripped off after the yeast bard with the following ratios of its components, wt.%: Surface-active substances 1-5 The molasses is one stripped off of the postpartum bard 95-99 25 2, the composition according to claim 1, in which it contains as ethoxylate phenol with a degree of ethoxylation. 10-12 or alkyl sulfonate, or alkylaryl - 30 sulfonate. 0.5 99.5 Known composition Does not protect 45.0 Proposed composition ABOUT About "5 1" 0 5 "About 10.0 Table 1 +6 Gas coi 50 5098.3 densat, 20 80100 v.2 Note. Inhibitor concentration in all experiments 1000 mg / l. Oil Density, g / cm Viscosity at 20 ° C, MMVc Pour point, С 1465547 6lit2 ten Table3 Table 4 0.856 0.910 56.7 73.0 +27 + 13 eleven The bulk of the composition is one, wt.% Paraffin Resins Asphaltenes Naphthenic and matic f azo condensate Density, g / cm Viscosity, at Pour point of gas condensate, ° С At the bottom of the phe single composition, wt.% Viscosity at 30 ° C. 146554712 Continuation of table 4 14.2 38.9 1.6 Up to 100 3.2  0.808 0.80 2.4 ABOUT