METHOD FOR TREATING SEAM Russian patent published in 1996 - IPC

FIELD: oil production. SUBSTANCE: explosive charges are placed at different depths in fuel-oxidant composition. Each charge provides initial fractures. Fracture initiation is carried out in series. Needed effective pressure is maintained inside the well during all time the fuel-oxidant composition burns. Distance between the charges and initiation delay time are chosen so as to keep proper relations to take into account fuel- oxidant properties and well conditions. Water solution of ammonium nitrate and hydroortophosphate ammonium (NH₄)₂HPO₄ are used as the fuel-oxidant composition. The latter is added individually or in the form of mixtures with ammonium nitrate and/or mixtures with potassium nitrate, and/or mixtures with dihydrophosphate ammonium. EFFECT: higher productivity. 5 cl, 1 dwg, 1 tbl