油田开发效果评价新方法研究

依据相渗理论,推导出了采出程度随含水变化的理论公式,分析了用采收率评价油田开发效果存在的局限性,提出了应用理想系数、实际采出程度和含水关系曲线与理论采出程度和含水关系曲线对比来评价油田开发效果的新方法.利用理想系数来评价层系组合、开发方式、井网井距、增产措施等人为因素的适应性和合理性,能够较好地预见通过改善、调整这些因素,油田开发效果的可提高程度,从而为老油田潜力区块的筛选提供依据.

A Novel Evaluating Method for Oilfield Development Effects

On the basis of the fundamental theory of two-phase flow, this paper derives a formula of theoretical recovery percentage vs water cut, defines a new concept of ideal factor, and carries out a new method which use comparing the actual curve of recovery percentage of OOIP vs. water cut with the theoretical curve and ideal factor to evaluate the effect of oilfield development, as the old method of using recovery factor to evaluate the effect of oilfield development has some limitation . The suitability of man-made factor ,such as, series of development strata, development scheme, well pattern and space, measures, can be assessed by the ideal factor . And estimate the recovery increase by improving the man-made factor. So this method provide criterion for optimizing the potential blocks.