An Update on Travale-Radicondoli Geothermal Field

Abstract

Travde-Radicntldoli field can he sutdivided into h e reservorrs with little inrzrcnnncctions and pxticular features. Kz?ier..ulr A, drilled in the early 19Sk is the shallowest and was watered wit very soon by pound water. The pressurc disnibutxon was, and stdl is. hydrostatic. Reservuir B, with m initial pressure of 6 MPa at m depth, was in tyuilthnum with reservoir A. 11s production, exceptionaliy hlgh in rhc bcgirining. underwent a subsrantid decline. Later, a preponderwt conwibution of meteoric water stabilized the prduction. Keservuir C wits drilled in the 1980s at 1.3-2.5 km depth. Pressure drstribution was vaporstatic although must wclIs have k e n pmducing somc liquid water. The initial pressure was 5.5 MPa, while reservoir 8 had declined by that time from 6 to 2 MPa. In spite uf these favorable aspects, production declined more rapidly than cxpecled. Reservoir D, currently under development, is placed below rcsenoirs B and C at a depth of 3-4 km. Initial pressure was found to he in vaporstatic equilibrium with the initial pressures of reservoirs I3 iind C. Steam is superheated in the reservoir and contains chloride. -171~ tnost p d u c n v c wells have initif flowrates as high as 30 kds. AI the field boundary noncommmcd wclls were drilled. These welLc x c dry or produce CO, and/or liquid walcr. Static pressures are in cquilihrium with the vaporstatic pressure disuihuhon of the other reservoirs. This part of [he field border will k referred to as reservoir E.