temperature and pressure in the svartsengi ... - Orkustofnun

485 SPATIAL DISTRIBUTION OF TEMPERATURE AND PRESSURE INTHE RESERVOIRLocation of wells and cross-sections Is shown In relationwith the locatIon of the power plant In Svartsengi (Fig.37). In order to show both the vertical and the horizontaldistribution of the temperature. several croas-sectionshave been selected together with planar mapsdepths.at various5.1 Vertical distributionThe wells I n Svartsengi are more or less alligned in theSW - NE direction. Cross- section A will therefore be theprinCipal one (Fig. 37). In addition five other crosssectionshave been selected In order to see better thethree dimensionalthermal system. Weindividually.variationwill nowof temperature In the geodiscusseach cross- section5.1.1 Cross-section AThe location is shown in Fig.distribution is shown for 1976initial state of the reservoir),37. and the temperature(which is close to the1982 and 1983. BeforeexplOitation, temperatures in excess of 2~0°C were found inwells SO - ~ and SO-5 (Fig. 38), but in 1982 such tempera ­tures were only observed in the SW part of the field inwells SO-ll, 9, 8 and 7 (Fig. 39). In 1983 temperaturesof 240°C cannot be found in the reservoir (Fig. 40). Thehottest part of the reservoir at this time is 230 - 235°C.There seems to be a temperature inversion in the SW partof the field. and the hottest part atlarge depth seems tobe around wells SO-5 and SO-6. The disappearance of the2~OoCfluid can be associated with the utilization of thefield. Production started from the northern part of thefield, and up to 1981,the production was only from wellsSG-3, 4, 5 and 6. This means that the mass taken out of the