SU1298356A1 - Foaming composition for removing fluid fromoil and gas wells - Google Patents

Abstract

This invention relates to the oil and gas industry and allows for increasing the foaming capacity of the composition and the stability of the foam. For this purpose, it contains oxyethylated alkylphenol sulfate (COA) with 12-18 carbon atoms and 3-12 groups of ethylene oxide, alkyl sulfate, fatty acid alkanolamide sulfate, higher fatty alcohol, antifreeze and water. Ethylene glycol, or diethylene glycol, or glycol ether, or triethanolamine are used as antifreeze. The components included in 1 are taken in the following ratio, May L: SOA 5-20, alkyl sulfate 5-20, SADC 0.5-2, higher fatty alcohol 1-3, antifreeze 5-30, water the rest. The composition is obtained by simply mixing the components in predetermined quantities at a temperature of 25-40 C with stirring for 20-40 minutes. 1 hp f-ly, 1 tab. (L

Description

The invention relates to foaming compositions that have a high foaming capacity and stability designed to remove water and drilling mud sludge from oil and gas wells.

The aim of the invention is to increase the foaming capacity and stability of the foam.

The exclusion of any component or a change in the composition beyond the specified limits impair its homogeneity, or stability, or foaming ability.

The composition is obtained by simply mixing the components in predetermined amounts at 25-40 ° C with stirring for 20-40 minutes.

The foaming capacity was determined in a manner similar to the known method (by the amount of water removed as a stable foam). This was taken as a cylindrical column 1.8 m high and 63.5 mm in diameter. To the top of the column attached extender for

collecting foam. The column contained 950 cm of water, in which 4 g of NaCt, 1 g of NaHCO, 2 g of CaSO 2 g of CaCt, was dissolved. 4-g. 50 g 10%

CaCtj, 4-g MgCf, bentonite suspensions and 10 cm of diesel fuel. To test foaming properties, 0.2 was prepared; 0.5% solutions of the foaming agent (% by active substance). Through the bottom of the column, air was supplied at a flow rate of 30 l / min for 20 minutes, after which the amount of water removed was measured as a stable foam.

The stability of the pins was estimated as follows. The foam formed was filled with liter beakers and, with the help of a stopwatch, the time of destruction of 50% of the foam volume was recorded. Example 1. Oxyethylated alkylphenol sulfate with 15 carbon atoms and 6 groups of ethylene oxide (sodium salt) 10

Alkyl sulfate fr. C, 2-C, 4 (sodium salt) 15

Monoethanolamide sulfate

fatty acids fr. Cfo-

C, g (sodium sbl) 1,5

Higher fatty alcohol FRG-G2

B, 2 1,

Ethylene glycol15

Water- Rest

Foaming composition was obtained by mixing the components with and with stirring for 30 minutes Tap water was used to prepare the formulation. The composition of this example is a homogeneous liquid with a viscosity of 30 MPa.s. The foaming properties of the composition according to this example, as well as the compositions according to other examples are given in the table. Example 2 Oxyethylated alkylphenol sulfate with 15 carbon atoms and 12 groups of ethylene oxide (sodium salt) 5

Alkyl sulfate fr. C, -C, (sodium salt) 20 Sulfate of monoethanolamides of fatty acids of Ci6 fraction (sodium salt) Higher fatty alcohol FR.

n2

Ethylene glycol15

WaterEverything

The method of preparation is the same as in Example 1. EXAMPLE 3 Oxyethylated alkylphenol sulfate with 15 carbon atoms and 3 groups of ethylene oxide (sodium salt) 20

Alkylsulfate fr.Soj, (sodium salt) 5 Sulfate monoethanolamides of fatty acids fr.S, dC, 5 (sodium salt) 0,5 Higher fatty alcohol fr.

S.Og-G

1 10

Ethylene Glycol Water

The method of preparation and in example 1.

one

15

The rest is the same.

0

five

EXAMPLE 4 Oxyethylated alkylphenol sulfate with 18 carbon atoms and 6 groups of ethylene oxide (sodium salt)

Alkyl sulfate fr.S., 2 C, 4 (sodium salt) Sulfate monoethanolamides of fatty acids fr.S, d -C, g (sodium salt) Higher fatty alcohol fr.

C {2

ten

15

1.5

3129-;

Diethylene glycol15

Water Rest

The method of preparation is the same as in example 1.

Example.j

 Oxyethylated alkylphenol sulfate with 12 carbon atoms and 6 groups of ethylene oxide (sodium salt) 15 fO

14

Alkyl sulfate fr.S, -C, (sodium salt)

Fatty acid monoethanolamide sulfate fr.S., dC, g (sodium salt)

Higher fatty alcohol fr.

g

 Diethylene glycol

Water

The method of preparation is the same as in example 1, PRI me R 6. Oxyethylated alkylphenol sulfate with 15 carbon atoms and 10 groups of ethylene oxide (triethanolamine salt) 15

Alkylsulfate fr.S, O-C ;, (triethanolamine salt) 15 Sulfate monoethanolamides

fatty acids fr.S., (triethanolamine salt) 1,5 Higher lirsh alcohol fr.

 -42

Triethanolamine5

WaterEverything

The method of preparation is the same as in example 1, but the mixing time is 20 minutes and the temperature.

Example 7. Oxyethylated alkylphenol sulfate with 15 carbon atoms and 6 groups of ethylene oxide (sodium salt) 15

Alkyl sulfate fr.S, o-C, d (sodium salt) 10

Fatty acid monoethanolamide sulphate fr.su-C9 (sodium salt) Higher fatty alcohol fr.

10 -18

one

3 30

Glycol ether

WaterEverything

The method of preparation is the same as

in example 1, but the mixing time

0 min, and the temperature is 40 C.

j

fO

15

20

25

thirty

five

0

PTB4

Example. Oxyethylated alkylphenol sulfate with 15 carbon atoms and 6 groups of ethylene oxide (triethanolamine salt) 10 Alkyl sulfate fr., (Triethanolamine salt) 15 Fatty acid diethanolamide sulfate fr., (Triethanolamine salt) 1.5 Higher fatty alcohol fr.

C, 2-C, 4 2

Diethylene glycol 20

Water. The rest

The method of preparation is the same as in example 1.

The table summarizes the results of research foams of the proposed composition and the best of the variants of the known composition (example 9), wt.%:

PRI me R 9.. Hydroxyethylenated higher fatty alcohol fr.S. with 15 groups of ethylene oxide80

Oxyethylated sulfonate sulfate with 5 groups of ethylene oxide (diethanolamine salt) 5 Alkylaryl sulfonate with 18 carbon atoms (di-ethanolamine salt) 5 Diethanolamide acids t coconut oil 5, Diethanolamine 5

The comparative foaming capacity and stability of the foams of the proposed and known compositions are given in the table.

45

50

55

0.2 0.5 0.2 0.5

Prodol. tables

The data of the known method.

Studies have shown that the proposed composition for foaming

Compiled by I. Lopakov Editor A.Vorovich Tekhred L.Serdyukova Proofreader A.Obruchar

 ..-P. -uh--., - - - - -J .--. .-. mi ..

Order 868/31 Circulation 533 Subscription

VNIIG1I USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, Projecto st., 4

2983566

the ability and stability of the foam is 2-4 times greater than the known composition,

Claims (2)

1. Foaming composition for removing liquid from oil and gas wells, including oxyethylated alkylphenol sulfate and antifreeze, characterized in that, in order to increase foaming capacity and foam stability, oxyethylated alkylphenol sulfate contains 12-18 carbon atoms and 3-12 ethylene oxide groups, and the composition additionally includes alkyl sulphate, fatty acid alkanolamide sulphate, higher fatty alcohol and water in the following ratio of components, wt%: Oxyethylated alkylphenol sulphate with 12-18 carbon atoms sort and group 3-12 ca. five ethylene sidine Alkylsulfonate from 10-18 atoms 5-20 5-20 0 five carbon toms Fatty acid alkanolamide sulphate with 7-16 carbon atoms 0.5-2 Higher fatty alcohol with 10- 18 carbon atoms 1-3 Antifreeze5-30 WaterEverything 2. Composition POP.1, characterized in that it contains ethylene glycol, or diethylene glycol, or glycol ether, or triethanolamine as antifreeze.