Exhaust gas provides alternative gas source for cyclic EOR

摘要: Injected exhaust gas from a natural or propane engine enhanced oil recovery several Nebraska and Kansas wells. The gas, containing nitrogen carbon dioxide, is processed through catalytic converted neutralized as necessary before being injected in cyclic (huff puff) operation. process equipment skid trailer mounted. these units drives the gas-injection compressor. after passing converter neutralizers approximately 13% CO[sub 2] 87% N[sub 2]. pH above 6.0 dew point near 0 F at atmospheric pressure. Water content 0.0078 gal/Mscf. This composition less corrosive than pure reduces viscosity by 30% 1,500 psi. supplies reservoir energy occupies pore space. paper describes permeability, applications, field examples.