The Effect Evaluation Of Water Injection Development Of Chang 6 Reservoir In Zhaizihe Area Of WuQi Field

The Zhaizihe area of Wuqi oilfield is located in the Central section of the west in Shanbei Slope(Yishan slope) of the Ordos Basin. The Chang6 reservoir is the main is also a typical special low permeability sandstone reservoir. The geological conditions are generally characterized by tight, low permeability, low porosity, low pressure, low oil saturation of the Arkose and siltstone. there is no natural output after drilling through the reservoir.Therefor, Only By fracturing reconstruct, most of wells have acquired the business value, but the single well production decline rapidly.Since water injection into the development, the formation energy of the Chang6 reservoir in the Zhaizihe area in some degree. At the same time it shows The formation pressure is kept declining, the oil production rate increases and the oil level is difficult to maintain with the increasing in the reservoirs depletion, affecting effect of oilfield development and development level.This paper identified the oil production, pressure and moisture content variation,the reservoir water injection and production capacity and balance, water distribution and promotion situation waterline, producing reserves and potential distribution through earring out water injection effectiveness evaluation by using the technology of reservoir engineering-, teh technology about Production and absorption profile analysis and Reservoir performance analysis etc. According to the existing problems, the paper puts forward the corresponding treatment scheme, forming a set of method system of low permeability reservoir development water injection evaluation. Reference has positive significance for the deep understanding of Chang 6 low permeability reservoirs effect. To improve the Qi field development results to ensure its long-term sustainable and stable development of effective technical ideas or technology system.