METHOD OF DEVELOPMENT OF OIL DEPOSIT Russian patent published in 2017 - IPC E21B43/22 C09K8/584 

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to oil industry, in particular to development of oil fields and crude oil production, and can be used for formations oil recovery increasing. The method of oil deposit development comprising oil driving from the formation by successive oil rings of displacement fluid with regulated viscousity and water, for fields with low formation temperature the displacement fluid is composition at the following ratio of components in wt %: complex SAA Neftenol VVD or mixture of non-ionic SAA - neonol AF9-12 or NP-40, or NP-50, and anionic SAA - volgonat or sulphanole - in ratio 2:1, 1.0-2.0, ammonium nitrate 10.0-15.0, carbamide 20.0-30.0, aluminium chloride or aluminium nitrate waterless or hydrated or their partially hydrolyzed forms 1.0-3.0, soda ash, or potassium carbonate, or ammonium carbonate, or hexamethylenetetramine (hexamin), or sodium nitrite 0.5-6.0, rest for water.

EFFECT: method of efficiency increasing of oil recovery from formation with low formation temperature by increasing of oil recovery factor.

3 dwg, 1 tbl, 7 ex