On Productivity Evaluation Method for Sand Reservoir With Free Fluid Porosity

Many qualitative or quantitative reservoir pro du ctivity forecast models based on Darcy's Law have been put forward, but these mo dels have many difficulties in use because they are limited by many uncertain fa ctors of dynamic data. Analyzed are pore structures; proposed is a new evaluatio n method of reservoir productivity based on the free fluid porosity. The method' s principle is simple, and it has better application value in practical producti on.