METHOD FOR EXTRACTING NON-HOMOGENEOUS OIL DEPOSIT Russian patent published in 2004 - IPC

FIELD: oil extractive industry.

SUBSTANCE: according to method, pumping of pushing agent into force-pumping wells is performed as well as extraction of product from extracting wells and transferring of pushing agent pumping front to extraction zone. Transfer of pushing agent pumping front to extracting area is performed by means of drilling side horizontal shafts in wells of first extracting row directed towards force-pumping row. Horizontal shaft is driven along beds with maximum remaining oil saturation. Wells of force-pumping row are completed as extracting. In row of extracting wells these wells, through one well, are completed as force-pumping. The rest of wells operate as extracting wells. When reaching limit of rentable level of water saturation these extracting wells are completed also as force-pumping.

EFFECT: higher effectiveness of mining due to additional mining of zone between force-pumping and first extracting rows of wells and intensifying oil extraction in contract rows.

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