摘要
稠油的渗流过程具有明显的非牛顿幂律性,目前常用的Aprs递减模型未考虑稠油的幂律性对产量递减规律的影响。基于幂律性的稠油油藏产量方程和相渗曲线,重新推导了调和递减方程,利用新建的产量方程,可分析幂律性对稠油油藏产量的影响,预测其产量及递减规律。实例应用结果表明,稠油的幂律性对产量递减规律影响显著,幂律指数越小,油井产量越低,递减速度越快; 幂律指数对递减率的影响主要表现在油田生产初期,而生产一段时间后,不同幂律指数下的递减率逐渐趋于一致; 当幂律指数大于0.8时,幂律指数对产量和递减率的影响相对较小。
It is obvious that there is power law feature for heavy oil, but the normal Aprs decline equation can not describe the power law feature for heavy oil. Aiming at this phenomenon, we conducted the harmonic decline equation based on the production equation and relative permeability curve of heavy oil reservoir. By means of this new equation, we can analyze the production of heavy oil reservoir, and we also can forecast the production decline rule. The solution of the study shows that the power law feature of the heavy oil effects the production decline law obviously, the higher of the power low index, the lower of the production, so, the power law feature should be considered when we forecast the production of the heavy reservoir, so as to make sure that the result of the forecast is reasonable.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2012年第4期97-98,102,共3页
Petroleum Geology and Recovery Efficiency
基金
国家科技重大专项"大型油气田及煤层气开发"子课题"海上油田丛式井网整体加密及综合调整油藏工程技术应用研究"(2011ZX05024-002-007)
关键词
稠油
幂律性
调和递减
产量方程
相渗曲线
递减规律
heavy oil
power law
harmonic decline
production equation
relative permeability curve
decline law
