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A Supplementary Method for Assessing the Reliability of Fluids Sampled from Deep Aquifers
Author(s) -
Nativ Ronit
Publication year - 1990
Publication title -
groundwater monitoring and remediation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 47
eISSN - 1745-6592
pISSN - 1069-3629
DOI - 10.1111/j.1745-6592.1990.tb00340.x
Subject(s) - aquifer , borehole , petroleum engineering , geology , reliability (semiconductor) , drill , geotechnical engineering , cushion , mineralogy , groundwater , materials science , engineering , thermodynamics , mechanical engineering , power (physics) , physics , metallurgy
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.