Research And Application Of Successive Indepth Profile Control Technology For Steam Drive Wells

The heavy oil block in Gudong Oilfield has the characteristics of thin layer,large rese rvoir heterogeneity,heterogeneity and large difference in crude oil viscosity.Buried deep 1050-1450 m,oil layer thickness of 3-15 m.After more than 20 years of multi-round steam injection,heavy oil steam drive well prone to steam channeling,resulting in further deterioration of the efficiency of steam drive,part of the wells without reactive liquid,ineffective throughput,and even flooding,seriously affected the steam drive effect.This paper analyzes the characteristics and reasons of Gudong reservoir steam flooding well formed large pore steam channeling,and put forward the control of steam channeling water control in heavy oil thermal recovery wells comprehensive control measures for mining characteristics of Gudong heavy oil thermal recovery wells and problems,proposed and designed just outside the soft particles successive profile deep profile control technology,developed a successive flooding we lls profile of deep heavy oil thermal recovery series of plugging agent,designed the plugging process of deep flooding successive thermal recovery wels.By blocking the steam channeling large pore and high permeability layer,the medium and low permeability layer can be transferred to each other,can achieve different permeability at different depths of the successive profile control and deep drive heat transfer,so that the steam through the low permeability layer into the formation of deep,improve the suction profile,increase the effective spread to the volume,improve the efficiency of thermal recovery,to achieve deep thermal recovery.