Existing problems discussion of thick layer of heavy oil reservoir at late stage of huff and puff in Gaosheng oilfield

Gaosheng oilfield belongs to a typical thickmassive heavy oil reservoir and has entered the late period of development in 2008,with average daily oil production of less than 1 t per well.Fire flooding field test has been carried out in May,2008.At present,two development units,Gao-3618 and Gao-3,48 well groups in all have been implemented.Through injection-production dynamic tracking and regulation during the development process of fire flooding in five years,agood development effect has been obtained.But it also reflects many problems such as uneven fire wire propulsion,the maladjustment of mixing thin oil lifting technique,high temperature corrosion problems and etc,restricting the further development effect of fire flooding.Therefore,the research direction of theory research and technology of fire flooding for the next step has been proposed.