The geothermal gradient map of Central Tunisia: Comparison with structural,gravimetric and petroleum data |
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| Institution: | 1. Department of Mining Engineering, College of Engineering, University of Tehran, Iran;2. Institute of Geophysics, University of Tehran, Iran;1. Fisheries Research Institute, Medicinal Leech Research Laboratory, 32500 Eğirdir, Isparta, Turkey;2. Food, Agriculture and Livestock District Directorate, Yalvaç, Isparta, Turkey |
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| Abstract: | Five hundred and fifty temperature values, initially measured as either bottom-hole temperatures (BHT) or drill-stem tests (DST), from 98 selected petroleum exploration wells form the basis of a geothermal gradient map of central Tunisia. A “global-statistical” method was employed to correct the BHT measurements, using the DST as references. The geothermal gradient ranges from 23° to 49°C/km. Comparison of the geothermal gradient with structural, gravimetric and petroleum data indicates that: - 1.(1) the general trend of the geothermal gradient curves reflects the main structural directions of the region,
- 2.(2) zones of low and high geothermal gradient are correlated with zones of negative and positive Bouguer anomalies and
- 3.(3) the five most important oil fields of central Tunisia are located near the geothermal gradient curve of 40° C/km.
Such associations could have practical importance in petroleum exploration, but their significance must first be established through further investigation and additional data. |
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