Research Of Development Technology About The Deep Heavy Oil Of Wutonggou Formation In Ji 7 Area

Domestic heavy oil resources are abundant,but due to economic and technological constraints,the development of medium and deep heavy oil faces many difficulties.The development method and development technology policy suitable for deep heavy oil are the key issues to be solved urgently.The Permian Wutonggou Formation reservoir in the Ji-7 well area has the characteristics of large proven reserves,thick oil,deep burial depth and relatively low reservoir permeability.In this paper,the Permian Wutonggou Formation reservoir in the Ji-7 well area is taken as an example to effectively utilize the deep heavy oil reservoir of the Permian Wutonggou Formation in the Ji-7 well area,from stratigraphic,structural,facies,reservoir characteristics,reservoir types and fluid property of reservoir.According production test data of the Ji 7 area experiment well group to analyse the applicabilityby comparing to similar middle-deep heavy oil reservoir development technology of home and abroad.From the seepage flow characteristics of deep heavy oil reservoir of Ji 7 area,Conventional waterflood in early little effect on hot water injection and co₂injection in later.According the rock structure,rock wettability,pore structure and sensibility of reservoir to predict water drive recovery factor by physics simulation experiment in laboratory.According the study of vertical heterogeneous model and areal heterogeneous to speculate the oil viscosity upper limit of conventional waterfloodapplication.According the empirical equation,transient testing,reasonable oil recovery rate,economic limits and waterflooding test area data to demonstrate the injector-producer wells,well spacing,pressure system and injection production ratio.Through the above research and program comparison,it is preferred to carry out conventional water flooding development in the area where the viscosity of the crude oil in the Ji 7 well area is greater than 2000 m Pa·s,and adopt the anti-seven point injection well pattern net to deploy the vertical well.The annual production capacity of this scheme is 528,300 tons.Research methods and results understanding provide valuable experience for the development of deep heavy oil reservoirs in China for reference.