METHOD FOR MULTIPAY OIL DEPOSIT DEVELOPMENT Russian patent published in 2007 - IPC E21B43/14 E21B43/20 

FIELD: oil production, particularly methods or apparatus for obtaining oil, gas, water, soluble or meltable materials from multizone wells.

SUBSTANCE: method involves drilling wells in oil deposit in accordance with deposit development way; producing oil by mechanized manner from upper and lower beds and injecting working liquid in beds for the purpose of bed treatment to maintain bed pressure. First of all simultaneous separate oil extraction from beds in single well is carried out to reduce well bottom pressure up to 3-4 MPa. Then some wells drilled in oil deposit are selected to perform simultaneous separate product extraction from one bed and inject liquid in another bed of single well via tube space. To execute above operations the beds are separated with packer and during liquid injection in lower bed well filter within upper bed interval is isolated with packers. The packers are connected to tubing string so that filter is opposite to upper bed for product extraction from above bed. Tube space over upper packer is communicated with that below lower packer through bypass channels.

EFFECT: decreased capital costs of oil deposit development, reduced time, power and labor inputs.

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