METHOD FOR PETROLEUM DISPLACEMENT FROM OIL POOL Russian patent published in 2006 - IPC C12N1/20 E21B43/22 

FIELD: biotechnology, petroleum-extracting industry.

SUBSTANCE: invention relates to microbiological methods for extraction of residual oil from flooded pools at the late stage of the deposit exploitation. Method involves the successive pumping in an aqueous solution of mixture of active silt with a stabilizing agent into forcing stratum wherein starch and hydrolysis sugar are used in the following ratio of components, wt.-%: active silt, 0.1-5.0; starch, 0.1-1.0; hydrolysis sugar, 0.5-3.5, and water, the balance. Using the method in petroleum-extracting industry allows stabilization active silt particles in volume of the pumped solution and more penetration into stratum, to enhance effectiveness of petroleum extraction from heterogeneous collectors by 12.8%, to diminish flooding degree of extracted production and nonproductive water pumping in.

EFFECT: improved method for displacement.

2 tbl, 3 ex