Research and field test of complex thermal fluid huff and puff technology for offshore viscous oil recovery

Abstract

In order to break through the bottleneck of thermal recovery technology for offshore viscous oil,the complex thermal fluid huff and puff technology has been researched,the facilities of complex thermal fluids and the thermal production wellhead equipment have been modified,the thermal insulation technology of borehole has been improved,and the injection-production parameters have been optimized.The technology was tested in NB35-2 oilfield with the obvious stimulation effectiveness.It laid a foundation for large-scale application in the offshore viscous oil thermal recovery in our country.