Dynamic Analysis Of Chang 8 Reservoir Development In Zhuang 36 Area

The Chang 8 reservoir in Zhuang 36 area belongs to low-porosity,ultra-low-porosity and ultra-low-permeability lithologic reservoirs.There are some problems in the development process of reservoirs,which affect the rational and effective development of reservoirs.The current development technology policy is in conflict with the development demand,so it is necessary to carry out geological recognition of the reservoir.Combined with production dynamics and highlighted problems,a technical policy that meets current development needs is formulated to ensure efficient development and stable production of oil reservoirs.Based on the recognition of reservoir geologic characteristics,this paper analyzes the distribution of production capacity,the condition of water saturation,the distribution of pressure,the degree of effectiveness of water injection,water flood characteristics,injection-production correspondence,the effect and influencing factors of oil well measures in the process of oil reservoir production.It is recognized from the results that the water content is rising significantly,the proportion of high and low productivity wells is high,the formation energy distribution is uneven,the potential of some oil wells is not fully developed and the heterogeneity is serious,which affects the water injection efficiency of oil wells.In view of the current production problems in the study area,two main tasks are carried out,one is the plane treatment as follows:(1)Adjust water injection parameters in different zones to improve formation energy;(2)Adopt two-way profile control and water shutoff to reduce the rising speed of water content in the main effective direction of water injection;(3)Re-fracturing of oil wells in areas with poor physical properties is adopted to improve the efficiency ratio and degree of oil wells;(4)The well network is encrypted to improve the utilization degree of remaining oil.The other is vertical treatment:(1)Adopt profile control and temporary acidification to increase the degree of water drive;(2)Reduce the water cut through perforations in the potential layer of high water cut wells.The numerical simulation shows that well pattern infilling in the north,center and south of the west study area,as well as in the center and in the east will increase the level of extraction by 2.53%,3.7,2.87%,6.55%,3.77%respectively.Encryption adjustment can greatly improve the development effect,and the sooner the better.Secondly,as for the perforation scheme for high water-cut wells,the crude oil production at the end of the simulation period is increased by 7.30×10~4t,and the recovery degree is increased by0.22%.