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长庆华庆地区超低渗透油藏目前开发难度逐渐加大,合理的井网井距一直难以确定。根据选定区域开发动态及渗流特征,分析应用水驱特征曲线法、产量不稳定分析法确定其计算动态储量的适用性,结合实际的动静态资料,进行了动态地质储量的计算;然后通过计算单井的动静储量比,给出了动态地质储量的分级指标。通过储量动态分级,从而建立了动态储量与井排距之间的关系,在确定单井动态储量的情况下为设计出合理的井距奠定了基础。通过实例分析表明,该方法计算简单、实用,为油井的合理井距设计提供依据,对超低渗透油藏的开发具有重要意义。
The development of ultra-low permeability reservoirs in Huaqing area of Changqing is more and more difficult at present, and it is difficult to determine the reasonable well spacing. According to the dynamic and seepage characteristics of the selected area, the application of the water flooding characteristic curve method and the yield instability analysis method to determine the applicability of the dynamic reserves are calculated, and the dynamic geological reserves are calculated according to the actual dynamic and static data. Then, The static and dynamic reserves ratio of single well gives the grading index of dynamic geological reserves. Through the dynamic grading of reserves, the relationship between dynamic reserves and well spacing is established, which provides the basis for designing reasonable well spacing in the case of single well dynamic reserves. The case study shows that the method is simple and practical, which provides the basis for rational well spacing design and is of great significance to the development of ultra - low permeability reservoirs.