Huff later stage comprehensive countermeasures in III5-6,III8-9 layer of Jinglou oilfield 1 block

Gradually steam huff and puff production enters the later stage,in III5-6,III8-9 layer in Jinglou oilfield 1 block,gas channeling more violently,edge water caused more water flooding well,oil layer producing degree difference in horizontal and vertical direction is big,block oil and gas ratio gradually decreased.In order to improve block production situation,block oil well huff rules and residual oil distribution law has been analyzed,comprehensive countermeasures of nitrogen chemically decrease viscosity auxiliary stimulation,the combination of steam injection,foam combined sealing profile control,layer perforation adding,short period stimulation has been put forward.After the implementation of the measures,reserve producing degree is improved,the decreasing is controlled,which has obtained the initial effect of stable yield and oil increment.