利用分形模型计算气水相对渗透率

CALCULATION OF GAS AND WATER RELATIVE PERMEABILITY BY THE FRACTAL MODEL

相对渗透率曲线是有水气藏开发计算、动态分析、气水分布关系研究的基础资料,而气水相对渗透率曲线一般通过气水两相渗流实验得到,但实验周期较长,往往不能满足科研生产需要。为了快速获得气水两相相对渗透率曲线,通过岩石毛细管压力曲线测定,建立孔隙结构分形模型,并利用分形模型计算气水相对渗透率。实践证明,利用分形模型计算的气水相对渗透率曲线与岩心的实测气水相对渗透率曲线吻合较好,可以较好地用于有水气藏的开发实践中。

Relative permeability curve is one kind of basic data for relevant engineering calculation,performance analysis and gas/water distribution analysis.Generally,gas/water relative permeability curves are acquired through time-costing experiment which is usually unacceptable for practical production.To calculate these curves in an efficient way,this paper brought up a fractal model for pore structure based on measurement of rock capillary pressure curve to calculate gas/water relative permeability.Practical applications proved the good matching of calculated relative permeability curve and experimental measurements.