Ways for Increasing Recovery Factor of Heavy Oil and Extra Heavy Oil Reseavoir

According to the characteristics of heavy Oil and extra heavy oil reservoirs to compose by shallow and thin layers and reter native and foreign information. We study approaches of increasing recovery facror. When advance Steam soak under steam injection with high-speed pulse, steam soak with infill well. Steamflooding under mode of uncontinous steam injection and horizontal fracture assisted. Cold production under wormhole and force production with low frequency pulsating sonic wave. If these techniques arc adopted, recovery factor (and utilization efficiency) can double.