SU981335A1 - Composition for removing and preventing resin and paraffin deposits - Google Patents

Description

one

The invention relates to the technology of oil production and can be used to remove and prevent tar-paraffin deposits in oil-field equipment and near-well formation zones.

Compositions are known for the removal of moloparaffin deposits based on oxyethylene products, for example OP-7 and OP-10 1.10

These reagents are limited. dispersing and wetting ability and to achieve the desired effect, it is necessary to increase their concentration in the oil to 0.5% or repeat the treatment several times.

The closest to the invention in terms of the composition of the components and the achieved result is a composition for removing and preventing tar-paraffin deposits in the extraction and transportation of oil, including a mixture of ethoxylated higher fatty alcohols (preparation OC-20), used as a solution in an aromatic solvent mixture benzene, toluene and xylenes f2j.

The disadvantages of the composition are low inhibitory efficacy and insufficient dispersing ability.

The purpose of the invention is to increase the effectiveness of the protection against deposits

The goal is achieved by the fact that the composition is for removal and prevention; The resin-paraffin deposits during the extraction and transportation of oil, including a mixture of ethoxylated fatty alcohols, additionally contain an aliphatic alcohol in the following ratio of components, May. %

The mixture of ethoxylated higher fatty alcohols 16-75

Aliphatic alcohol 258

As an aliphatic alcohol, it contains isobutyl or undecyl alcohol.

To give the composition the necessary technological properties of its solution 398

in low-melting aromatic solvents, which allows dosing of the reagent into oil using special pumps without heating the reagent at low ambient temperatures. The amount of solvent is chosen taking into account the physicochemical features of the oils and the rheological properties of the composition (sufficient fluidity) at the dosing temperature of the reagent.

A mixture of ethoxylated higher fatty alcohols (preparation OC-20) is polyethylene glycol monoalkyl ethers based on primary fatty alcohols of the general formula

S, Vi ° a-Vl D -18; .

The composition is prepared by the usual displacement of the components in the indicated ratios.

In tab. Figure 1 shows the substantiation of the ratio of components for the composition in terms of the interfacial surface tension determined at the oil – water interface by the steel – thermometric method.

Given in Table. 1 data show that the composition obtained with the ratio of OS-20: idobutyl alcohol equal to 75:25. provides the greatest reduction in interfacial surface tension from 27.6 to 5.3 Erg / cm with a concentration in oil of 0.00.

AT . Figure 2 shows the inhibitory capacity of the composition, determined in terms of the saturation temperature of the oil with paraffin.

Given in Table. 2 data show that the proposed composition, prepared with a ratio of OS-20: alcohol 75:25. lowers the temperature by 54

oil paraffin from 28 to, which contributes to the increase in inhibitory ability.

In tab. Figure 3 shows the detergent and dispersing ability (detergency) of the composition at a ratio of OS-20: 75:25 isobutyl alcohol and the composition of the prototype.

In tab. The results of the determination of the inhibitory ability of the proposed composition compared with the known ones based on pure OC-2G are given.

From the table. 3 and A data show that the composition containing

OC-20 and apifaticheskoe alcohol has a higher detergent and inhibitory ability.

The composition can be implemented on Samotlor and Mortym-Teterevsky

deposits for removing paraffin deposits and preventing them.

The cost of one ton of the composition is about 300 rubles.

Its application is economically more profitable as compared with imported reagents of the type, the cost of which is 1500 r per 1 ton and the efficiency in the oils of Western Siberia does not exceed

2b. The application of the proposed composition allows to significantly increase the efficiency of well treatment, where smoparaffin deposits are observed, and to obtain an economic effect of about 5.0 thousand r. on one well. The annual economic effect with the processing needs of 20 wells in the Mortym-Teterevsky field is 103 thousand p. The optimal dosage of the proposed composition to the well is 0.02 May. %

Table 1

The interfacial surface is 0.002 18.90 nod nat27, 6 0.004 11.60 ng at the oil-water interface. Erg / cm 15.20 13.30 13.99 5.30 8.20 1 +, 30

Table 2

Table3

Table

Claims (3)

Claim 21.1 30.8 55.0 10.0 1. The composition for removal and pre-. rotation of resin-paraffin deposits during oil production and transportation, including a mixture of ethoxylated higher fatty alcohols, which means that, in order to increase the effectiveness of protection against deposits, it additionally contains aliphatic alcohol in the following May component ratio. %: A mixture of ethoxylated higher fatty alcohols Aliphatic alcohol VNIIIPI 16-75 25-84 ______ Order 9627/35 ____________ PPP Branch Patent, Uzhhorod, st. Design 2. Composition by π. 1, with the fact that as an aliphatic alcohol it contains yzobutyl and undecyl alcohol. 3. The composition of the pop. 1, with the fact that the composition is used as a solution in an aromatic solvent.