METHOD FOR DEVELOPMENT OF SHALLOW DEPOSITS AND SEPARATE LENSES OF MULTIPLE-BED OIL DEPOSIT Russian patent published in 1997 - IPC

FIELD: oil production industry. SUBSTANCE: method implies injection of chemical reagents into productive bed through well, increase of bed pressure due to liberation of carbon dioxide in result of reaction, and taking of product through same well. Drilled through vertical well over productive bed is at least one horizontal hole having curvilinear positioning in plan. Calculated volume of reagents is injected periodically with time delay for pressure stabilization without taking product between periods until bed pressure increases up to initial value. Subsequent taking of product is effected up to economically profitable level is retained. Cycles are repeated. EFFECT: high efficiency. 1 tbl, 2 dwg