METHOD FOR RECOVERING OF MINERALS Russian patent published in 1998 - IPC

FIELD: mining industry. SUBSTANCE: this relates to final recovery of heavy high-viscosity hydrocarbons and bitumens from low-permeable areas of deposit containing high-viscosity oil and bitumen by using thermal method which makes action brought to bear upon deposit bed more efficient. According to method, productive bed is opened by means of at least two wells. Created in deposit bed is high-frequency electromagnetic field. This makes hydrocarbon raw materials more fluid for easier recovery of product to ground surface. Determined is value of dielectric permeability of deposit bed at pressure and temperature equal to respective bed values. High-frequency electromagnetic field is brought into action according to following relation , where f - frequency of electromagnetic field acting upon deposit bed, Hz; c - velocity of light, m/s; L - distance between injection well and nearest producing well, m; ε′ - dielectric permeability. EFFECT: higher efficiency.