A Study On Stable Production Technology In The Late Development Of Thin Oil Reservoirs In The North Area Of Shu1 District

The water injection reservoir in the northern part of Shu1 district was put into development in 1975,and water injection began in 1976.After several years of rapid production,the annual oil production in the region rose rapidly to 130×10~4t in 1980,and it continued to be new with the follow-up.Increased reserves,from 1981 to 1990,the water injection reservoirs in the northern part of Shu1 district maintained a 10%annual oil production rate for 10 years,but with the gradual extension of development time,the formation pressure reduced,the injection and production patterns was not perfect,and the uneven use of oil reservoirs became more and more serious.In order to achieve the goal of stable production of thin oil in this region,the research on stable production technology of water injection reservoir development was carried out,focusing on the potential of small fault blocks,the stability of complex fault blocks,the use of single sand bodies and the distribution of remaining oil in high-recovery blocks.Research and develop a corresponding stable production technology route.In this paper,the reservoir properties and related development history of the water injection reservoirs in the northern part of the first district are studied.The restrictive problems in the development of the water injection reservoirs in the northern part of Shu1district are analyzed,and corresponding technical countermeasures are formulated for such constraints.In order to investigate the unutilized potential of small fault blocks in the edge,study the technology of stable production of complex fault blocks,find low-use areas for water injection in single sand bodies,and focus on the distribution of remaining oil in high-production areas.Through the continuous research and implementation of the thin oil stable production technology,the water injection assisted development of the small fault block and the subdivision layer development of the complex fault block plan,the single sand body reservoir adopts the new technology to improve the utilization condition,and the high-production block is carried out.With reasonable resumption of production,the water injection reservoirs in the northern part of Shu1 district have achieved overall production,and the comprehensive decline rate and the natural decline rate have all declined,and the corresponding stable oil production technology system has been formed,which is of great significance for the effective development of the same type of reservoir..