Study On Water-flooding Exploitation Technology Policy Of Y6 And Y9 Reservoirs

In recent years, with the exploration and evaluation development,Y6 andY9 reservoirs of Y group indicate that they have good potentiality and development prospects. The reasons of some wells whose water-cut is higher in Y group include bottom water coning and unreasonable perforating position.The dynamicsanalysisof Y6 and Y9 reservoirs shows that the reservoirshas edge and bottom water and theproduction is relatively stable and comparatively high. Y6 and y9 reservoir, oil production accounts for about 80% of the total area, energy is abundant and water-cut is generally low, are main production region of Y group. Reservoir quality is good by log interpretation and geological analysis. Differentregions of Y9 reservoir have different single well productivity.Central and northeastern areas’ energy is sufficient and the production capacity is relatively high, but some wells water-cut is higher.In order to further develop the potentiality of the reservoirs, it is essential to conduct technical policiesbased on fully realizing the characteristics of each reservoir for technology study prepared for reasonable development.Through the dynamic analysis of Y6 and Y9 layers, numerical simulation method is used to establish a numerical model of the reservoirs. Model is used to study technology policies which include the oil, liquid production rate, injection intensity, time of injection, rate of water injection and horizontal well design. Studies show that Y6 and Y9 are commingled to develop, regions whose bottom water is active are to inject waterafter using their energy to mine about 1 year.Areaswhose bottom water is not active are needed to inject water at the same time.