Several Important Issues on Cold Production of Heavy Oil in Henan Oilfield

Four main problems that have effects on heavy oil cold production technique are discussed on base of field data. Big-hole, deep penetration and high density pattern perforation technology must be applied in cold production wells; progressive cavity pumps with high rotation speed and being suitable for high sand cut and large crude densi ty should be used and run to the bottom of oil layers; ultraheavy and superheavy oil layers are the main targets for cold production; and directional cluster wells are suitable for development of multiplayer narrow string heavy oil reservoirs controlled by faults.