DEVELOPMENT OF DOWN-HOLE STEAM GENERATOR FOR THE RECOVERY OF HEAVY OIL.

本研究的目的是通过在油砂油藏中同时注入化学剂和井下产生的蒸汽来提高稠油和沥青的采收率。设计并建造了两种井下蒸汽发电机组。一种是燃气燃烧器类型，设计为每小时产生5-10公斤。工作压力15 kg/cm~2。发生器全长1m，直径125 mm。燃气最初与空气混合，以保持燃烧器内的稳定燃烧。进口水由废气预热后注入换热柱，燃烧器式发生器产生94.8%的干蒸汽，换热效率为66%。另一种是由嵌套导线和金属铸件加热器构成的内置式电加热器。该加热器可产生93.6%的干蒸汽，换热效率为70%。

The purpose of this research is to improve the recovery of heavy oil and bitumen by the simultaneous injection of chemicals with down-hole generated steam in oil sand reservoirs. Two types of down-hole steam gene-rating units are designed and constructed. One is a gas burner type and was designed to generate 5-10 kg/hr. Of steam under a working pressure of 15 kg/cm^2. The total length of the generator is 1m and its diameter is 125mm. Fuel gas was initially mixed with air in order to maintain a stable combus-tion in the burner. The inlet water was pre-heated by waste flue gas and then injected into the heat exchange columns.The burner type generator produced 94.8% of dry steam and exhibited a heat exchange efficiency of 66%.the other one is an internal electrical heater which was constructed by seathed wire and metal casted heater. This type of heater was capable of producing 93.6% dry steam with a heat exchange efficiency of 70%.