COMPUTER MODELLING OF AN OVER-PRESSURED MEDIUM ENTHALPYGEOTHERMAL RESERVOIR LOCATED IN DEEP SEDIMENTARY BASIN

Abstract

Over-pressure conditions occur in the southeastern regon of the Pannonian Basin due to the reversal of the regional tectonic stress beginning in the Middle Mocene. Exploratory wells in the area discovered well head pressures close to 350 bar and high temperatures exceeding 190oC at depth of 3,500 m.

These promising shows, based on early appraisals, require thorough in depth investigations in terms of reservoir size, recoverable reserves, well deliverabilities in order to assess whether the resource could sustain feasible development issues for electricity production.

The paper reviews the results of the preliminary reservoir simulation studies carried out for the area in question addressing reservoir evaluation: i.e. lateral extent, thickness and volume, tectonic features, governing boundary condtions, porosity/ permeability patterns, reservoir compartments and continuity between these compartments.