A New Approach in Pressure Transient Analysis: Using Numerical Density Derivatives to Improve Diagnosis of Flow Regimes and Estimation of Reservoir Properties for Multiple Phase Flow

Table 1

Reservoir and fluid data for Example 1.

Parameters	Design value
Eclipse model	Black oil
Model dimension	10 × 5 × 5
Length by width, ft by ft	500 × 400
Thickness , ft	250
Permeability by , mD	50.0 by 50.0
Porosity %	20
Well diameter, ft	0.60
Initial water saturation , %	22
Permeability, , mD	50
Gas oil contact (GOC), ft	8820
Oil water contact (OWC), ft	9000.0
Initial pressure, , psia	4000.0
Formation temperature, , oF	200.0