Numerical Simulation Study of the Geothermal Reservoir, Sabalan - Iran

Abstract

Simulation of geothermal fracture reservoirs is a difficult task both due to the description of the reservoirs and numeric methods. The flow rate of geothermal fluid production from a fractured reservoir is a function including several variables; size and specifications of the blocks of matrix and the saturation of the fraction system. The double porosity method assumes that the porous fractured layer can be shown by two overlapping connected systems that are called fraction and matrix. The fractured part constitutes some connected fractions together with vugs that make the primary ducts for the fluid current. The matrix is also constructed of porous spaces of stone that contains the biggest share of the supply of the reservoir. In this field, after obtaining the conformity of the log and adjusting the reservoir parameters and completing the dynamic model, its future conditions were studied. To do so, according to the current conditions regarding the number of the wells, well testing and well logging results, separator conditions and the steam flow rate of production, different production and re-injection methods were studied aiming at determining the best production scenario.