CELLULOSE FLOUR FOR SHUTOFF OF WATER-BEARING OR WATERED LAYERS IN ORDER TO INCREASE PRODUCTION RATE AND METHOD FOR ITS MANUFACTURING Russian patent published in 2016 - IPC C09K8/588 C09K8/514 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the oil industry, in particular, to methods of shutoff of water-bearing or watered layers. The method for shutoff of water-bearing or watered layers includes injection into shutoff interval of water-shutoff compound, which is represented by cellulose flour including microfiber powdered product based on cellulose-containing annual crops, high-grained mineral hydromica, stabilising thermally stable salt-resistant polymer additive. The method for manufacturing cellulose flour includes preliminary mixing of cellulose-containing fibre raw material and mineral additives with their further grinding and mixing of the obtained grind with thermally stable salt-resistant polymer additive at the following ratio of ingredients, %: microfiber powdered product based on cellulose-containing annual crops 40-58.5, high-grained mineral hydromica 40-60, stabilising thermally stable salt-resistant polymer additive 1.5-5.

EFFECT: increased oil production rate and reduced water extraction from oil producing wells.

11 cl, 2 dwg