Productivity Study Of Fractured Well In Hailar Oilfield

In recent years, by applying geological static data and some conventional reservoir engineering methods, a lot of research in geologic analysis and productivity prediction of fractured well in Hailar Basin has been carried out, and some achievements has been acquired. However, it still lacks a systematic set of method which can predict production performance changes of fractured oil/water wells which was based on the geologic characteristic and the system of reservoir-fracture with fractures.According to the reservoir geologic characteristic in Hailar region and combining with the comprehensive analysis of historical data on oil production, the production decline dynamic analogy model of pre-fractured wells is established, applying multiple regression and linear regression methods in this paper; According to the fracturing fluid performance evaluation industry standards, the performance properties of the fracturing fluid which usually used in the Hailar region are determined; Through the core simulation experiment, we studied the influences of fracturing fluid cake and compaction effects of inside wall surface on permeability and the variation rule of flow conductivity of proppant rock pack within the cracks; The flowing equations which fluid flow through formation matrix, cracks and cake on the condition of dual porosity medium are established. Using simultaneous equations by superposition principle, the flow model in porous medium which has fracture well in Hailar oilfield is established. By numerical methods, these equations are solved, and the mathematical model to describe the productivity of fractured well is established; According to the relationship model of the production of pre-fractured and the fractured versus time in Hailar oil field, we give the effective way to calculate the period of validity of fracturing and get the influences of post-fractured response by analysing strata properties, cracks radius and fracture conductivity.