A Supplementary Method for Assessing the Reliability of Fluids Sampled from Deep Aquifers |
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| Authors: | Ronit Nativ |
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| Affiliation: | The author graduated from the Hebrew University of Jerusalem, Israel, in hydrology, and the Ben Gurion University of the Negev, Israel, in geology. She is involved primarily in hydrogeology of deep aquifers and in subsurface waste isolation. She currently conducts research and teaches hydrology at the Hebrew University of Jerusalem (The Seagram Center for Soil and Water Sciences, The Faculty of Agriculture, The Hebrew University of Jerusalem, P.O. Box 12, Rehovot, Israel 76100). |
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| Abstract: | In deep aquifers, temperatures of formation fluids recovered during drill-stem tests were usually higher than regular bottom-hole temperatures recorded at the same borehole and interval. Wherever the opposite was observed, the sampled formation fluids were diluted with mud filtrate or cushion water. Temperature measurements are a useful criterion for differentiating between representative and contaminated formation-fluid samples. |
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