Reasonable Injection-production Structure Adjustment Method Research On Small Channel Sand

The block studied in this article belongs to the Gaotaizi oil field,which is the typical small channel sand.Gao Taizi Oilfield has been more than 40 years history,since produced first time.With the further development,Gao Taizi Oilfield is inevitable ushered in the high water cut development period.Pattern density and heterogeneity of the Oil field is serious at present,.How to effectively potential Tap is the primary problem to be solved.In this background,on the basis of geological model that has been gived,the numerical simulation model is established for the study of history matching.The geological reserves,formation pressure,total water cut and single-well water-cut have already met the requirements of the fitting precision.With history matching meeting the requirements,first,through the forecast volume,change the relationship with the formation pressure change,has been making the annual formation pressure change within the plus or minus 0.5 MPa change range of the reasonable water injection,combined with the logistic cycle model at the same time,under the condition of different reservoir must be able to calculate the moisture content in a given output after the required specific surface-area,of course,the water injection quantity can make sense when it is within the reasonable water injection variation;Then,established six kinds of numerical simulation forecasting scheme,through forecasting each well group selected which adopts the scheme of cumulative oil production,daily oil production and comprehensive water content changes situation,and it can provides strong reference for Potential Tapping(e.g.cycle water injection,profile control,etc.)of the target and well layer selection;Finally,by hierarchical analysis theory and fuzzy comprehensive evaluation method,research on the Oilfield Stimulation(such as water plugging and fracturing and fill holes,etc.),through the related influence factors of quantitative calculation,namely can choose appropriate optimization measures of well layers.This article is studied on the several aspects of injection-production structure adjustment methods.Mean while it not only can be a theoretical basis for the potential tapping,but also can offer theoretical basis for other oilfield development.