Study On Optimization Of Injection-production Well Pattern And Development Adjustment Strategy For Aradeiba Reservoir In Block 6,Sudan

FN Oilfield is located in the central Sudan in northeast sag of Muglad basin tectonic belt,Aradeiba reservoir is located in the upper part of FN Oilfield,which belongs to layered weak edge water reservoir,putting into producing in 2003,and carried on the waterflood recovery strategy in 2010,has realized the "water injection",but due to dispersion of injection wells in the well patterns,relation between oil and water wells effect is poor,presenting "five low",low level,low production,low oil production,low water content and low effect,Although water injection development strategy has been made after a while,only wells working fluid level improved,According to the feedback results of reservoir production performance analysis,the water flooding effect of injection wells is poor,so it is urgent to rethink and study the injection and production well pattern of Aradeiba reservoir.In this paper,the research content and direction of this paper are clarified by investigating the development status and technical means of outer and domestic weak-edge water reservoirs,summarizing the achievements and understanding obtained so far.In combination with the practical situation of Aradeiba reservoir,carry out typical injection-production well group in water injection effect analysis,and set up evaluation standard two classes of problems wells,divided into high water wells and low efficiency wells,and reservoir fine description and reservoir engineering method is used to interpret well high water cut and low accurate,seepage resistance difference among single well layers can be used to explain the heterogeneity of the influence of oil well high water cut,It is believed that the difference of seepage resistance coefficient between different layers is the main reason for high water cut,and that the oil-water viscosity differences on the influence of the water cut change of the reservoir,by calculating the injection volume of each single well and the correlation coefficient between injection and production wells,the situation of low production and low efficiency of oil wells is understood qualitatively and quantitatively,recogning that the ratio of injection volume and the correlation coefficient between injection and production wells are the main influencing factors for low production and low efficiency,it provides important basis for reservoir numerical simulation and optimization program adjustment.In order to better develop Aradeiba reservoir efficiently,establish multi-wells injection and production numerical simulation model,combing with the remaining oil distribution in Aradeiba reservoir and the subsequent potential exploration,multiple optimization development programs are designed,to predict the production effects of each plan,choosing the best exploitation program to achieve the purpose of increasing yield and efficiency.