METHOD TO PRODUCE OIL OR GAS FROM MULTIPAY WELL Russian patent published in 2009 - IPC E21B43/00 E21B47/00 

FIELD: process engineering.

SUBSTANCE: invention relates to oil-and-gas industry and serves to produce oil or gas from several formations in wells that exploits multipay reservoirs. For this formation pressure is first determined for each formation. Extraction pump (EP) preliminary depth is calculated. Geophysical tools (GT) are installed above every formation using anchors. EP is lowered to preset depth to start production wherein production parameters are measured for every formation and input into GT long-term memory. During first EP recovery onto well mouth for replacement or repair, anchors with GT are also lifted. GT tool readings are used to determined bottom-hole pressure in formation with minimum formation pressure. Formation tester readings allow calculating EP depth proceeding from the condition that bottom-hole pressure does not exceed minimum formation pressure. Anchors with GT are again installed above every formation and EP is lowered to depth made more precise to go on extracting. In every subsequent recover of EH and GT, EP depth is corrected.

EFFECT: higher efficiency.

3 cl