SU926248A1 - Composition for cutting-off water inflow in high-temperature oil well - Google Patents

Description

(54) COMPOSITION FOR ISOLATION OF WATER INFLOW IN A HIGH-TEMPERATURE OIL WELL

one

The invention relates to the field of the oil industry and can be used to selectively isolate water inflows in oil wells.

A known composition for isolating water flow in high-temperature wells based on polymeric compounds in a liquid l.

The disadvantage of this composition is its low efficiency of use in high-temperature oil wells (higher) due to the lack of blockage of water injected part of the reservoir.

A known composition is S1JI for isolating the inflow of water in a high-temperature oil-well, containing silan bitumen with a softening temperature higher than that of water C2.

The disadvantage of this composition is its low stability in blocking, together with oil bearing aquifers.

The purpose of the invention is to improve the insulating ability of the composition and its stability.

This goal is achieved in that the composition for isolating the inflow of water in a high-temperature oil well, containing oxidized tempered bitumen. softening point above 140 ° C and water, additionally contains aliphatic amines or diamines, nx unsaturated

10 fatty acids and their derivatives and condensed sulfite-alcohol bard in the following ratio of components, wt.%:

Oxidized bitumen .10-35

five

Aliphatic amines

or diamines, or

n tredvpnye fat

acids and their derivatives 0, 1-1О

20

Condensed

sulfite alcohol

bard0,5-4

WaterEverything

The oxidized bitumen is a refractory mixture of high molecular weight hydrocarbons and their heteropolymers and is the product of the additional oxidation of heavy refining residues or low grade bitumen.

The composition of unsaturated fatty acids is expressed by the general formula

 (Rg-CH CH) - (CH2, -C

HE

where ft is alkyl C - Cd; Rg is alkylene C — C3; but. - 1 - 3 Aliphatic amines of the general formula

.Whg

and diamines

RX-CH-RJ-CH-Rg NHs HNg

where R-I or Rj is hydrogen or alkye C Caet Rj alkylene Ct - C2Q

Soderzhaniya components weight.

belong to organic amino compounds and are manufactured by chemical industry.

Condensed sulfite alcohol bard belongs to the class of lignosulfonates and is produced by the pulp and paper industry.

Laboratory studies of the effectiveness of the proposed composition were carried out with a sample of oxidized bitumen with

softening temperature with the addition of surfactants AAHIGShneft - 72, which mainly includes unsaturated fatty acids, or octadecylpropylene diamine, refers Shegoz to organic amino compounds, and condensed sulfite alcohol stillage. For the studies 15 mixtures were prepared, the compositions of which are given in table. Mixtures were prepared by dissolving CSSC in water followed by the introduction of oxidized bitumen, oil-soluble surfactant and mixing on a laboratory shaker.

Table 1

0.0

0.1 1O

1.0

3 5

10 0.1

ten

Oh oh

65

64.4

0.5 4 51

63

2 3

65 72

Oh 5

79.5

4 0.5

. 85.9 64.4

51

63

1 2 65

72 79.5

3 0.5

85.9 59262 The effectiveness of the table. 1, insulating compositions were evaluated by the solubility of the solid phase in the upper oil and formation water of the Ha n Cort field and the stability of the compositions. It is also determined

As can be seen from the table. 2, the optimum content of said oil soluble surfactants is 3%. .

The content is oil soluble surfactant. less than 0.1% practically does not increase the solubility of oxidized bitumen in oil. Increased oil content $

Table;

More than 10% of a rendered surfactant does not contribute to a further increase in soluble oxidized bitumen in oil.

The optimal content of lignosulfur. Nata is 2%. A content of 0 m & 0.5% does not contribute to increasing the stability of the insulating composition, and 486 solubility of only an oxidized bit, which is part of the insulating mixture; The results are shown in Table. 2

Claims (1)

Claim Composition for isolating the influx of water in a high-temperature oil well containing oxidized bitumen with a softening temperature above 140 ° C and water, characterized in that, in order to improve the insulating ability and increase the stability of the composition, it additionally contains aliphatic amines or diamines, or unsaturated fatty acids and their derivatives and condensed sulphite-alcohol vinasse in the following ratio of components, weight. %: Oxidized bitumen 10–35 Aliphatic amines or diamines, or unsaturated fatty acids and their derivatives 0.1-10 Condensed sulphite-alcohol stillage 0.5-4.0 Water Else