A Study Of Well Test Analysis Method In Waterflood Development Reservoir Performance

Waterflooding oil reservoir dynamic analysis methods of application in China have been quite extensive,but mostly methods are single well system analysis method.Experience shows that that if there exist adjacent wells interference,the single well system analysis method interpretation results is not accurate.After oil field put into comprehensive development, reservoir has become a multiwell system,and the mutual interference between adjacent wells generally.Therefore,the multiwell mystem test analysis method which can explain the interference phenomenon is important.This paper maked a deep research on method of the multiwell system test analysis in homogeneous infinite reservoir,achievements are as follows:(1) Considering wellbore storage and skin effect,waterflooding oil reservoir multiwall system production wells pressure falloff well test analysis model and injection well floodabitilty analysis analysis model,namely when startup well test analysis model,are established and worked out,External boundaries are considered as homogeneous infinity and non-darcy seepage flow.Typical curves are plotted by Matlab software,and then comparison and analysis different factors influence of the change on curve;(2) On the basis of well startup test analysis model,considering wellbore storage and skin effect,waterflooding oil reservoir multiwell system production wells pressure buildup well test analysis model and injection well floodabitilty analysis analysis model,namely when shut-in well test analysis model test analysis model,are established and worked out.External boundaries are considered as homogeneous infinity and non-darcy seepage flow.Typical curves are plotted by Matlab software,and then comparison and analysis different factors influence of the change on curve;(3) On the production well pressure curve characteristics basis, the article analyzes the injection-production balance and flooding intensity,and combined with the curve feature to analysis connecting relations;(4) Well test models are added into Swift well test analysis software,many wells datas from oilfeild are interpreted, the results verify the above models.