Geothermics of Nile Delta and Southeast Mediterranean: Investigation and Geothermal Energy Potential

M. Y. Zein El-Din, Z. M. Zaghloul, I. H. Khidr

We collected 289 temperature readings from 66 exploratory wells randomly distributed in an area about 57,000 km² from different rock units of Tertiary and Quaternary ages. The bottom-hole temperature (BHT) readings were corrected using an empirical equation based on actual static formation temperatures collected from the study area. We modified the Fertl and Wichmann method to apply to the study area. If the Fertl and Wichmann curve is applied, readings can be corrected using a deduced relation. The geothermal gradient for each well calculated used the best-fit method utilizing all recorded BHTs in that well. A new geothermal gradient map was constructed using the corrected BHT values.

A genetic relationship between the geothermal gradient and lithology, tectonic setup, gas saturation, and water saturation of the subsurface formations in the Nile delta and southeast Mediterranean area was sought. Isothermal maps at different depths in the study area were constructed. Areas of relatively high subsurface temperature were delineated. The Abu Madi gas field as a case study for geothermal behavior was emphasized.

The geothermal reservoirs in the study area as possible new and renewable energy resources were defined and classified as low-temperature reservoirs. Two geothermal reservoirs have been recorded: a shallow one associated with Mit Ghamr-El Wastani rock units and a deep one associated with Abu Madi-Qawassim Formations.

AAPG Search and Discovery Article #91032©1988 Mediterranean Basins Conference and Exhibition, Nice, France, 25-28 September 1988.