COMPOSITION FOR DISPLACEMENT OF OIL FROM FORMATIONS AND SELECTIVE LIMITATION OF WATER INFLOW Russian patent published in 2024 - IPC C09K8/584 C09K8/506 E21B43/22 E21B33/138 

Abstract RU 2811129 C1

FIELD: oil and gas industry.

SUBSTANCE: composition for displacing oil from formations and selectively limiting water inflows contains, wt.%: sodium chloride – 16.5-18.0; technical sodium lignosulfonate – 9.5-10.0; Neftenol-VKS – 5.0-7.0; Neftenol-GF – 0.5-3; oxyethylidene diphosphonic acid – 2.0; water – balance.

EFFECT: improved efficiency of displacement of residual oil by isolating highly permeable zones of the oil reservoir, reducing surface tension at the oil-water phase boundary, and increasing the coverage of reservoir rock by displacement.

1 cl, 3 dwg, 1 tbl

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RU 2 811 129 C1

Authors

Sentemov Andrei Alekseevich

Dates

2024-01-11Published

2023-04-05Filed