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	Analys av borrhålsmätningar	Petrografisk analys
Ämnesområde	Geovetenskap	Geovetenskap
Familj	Process / pipeline	Process / pipeline
Ursprungsår	1940s	1858
Upphovsperson	Guyod and Barnhart	Henry Clifton Sorby
Typ	subsurface characterization pipeline	compositional characterization pipeline
Ursprungskälla	Asquith, G. B., & Gibson, C. R. (2004). Basic Well Log Analysis (2nd ed.). American Association of Petroleum Geologists.	Tucker, M. E. (2003). Sedimentary Rocks in the Field: A Color Guide (3rd ed.). John Wiley & Sons.
Alias	wireline logging, borehole logging, petrophysical analysis	microscopy analysis, thin section analysis, modal composition determination
Närliggande	5	5
Sammanfattning	Well log analysis is the systematic examination of measurements recorded by instruments lowered into a borehole to characterize subsurface lithology, fluid content, and petrophysical properties. Originating in the 1940s, this method has become indispensable for petroleum exploration, groundwater assessment, and engineering geology. Well logs provide direct depth-correlated data that anchor interpretation of seismic surveys and constrain reservoir models.	Petrographic analysis is the microscopic examination of rock thin sections to determine mineral composition, grain size, texture, and diagenetic alteration. Pioneered by Sorby in 1858, this method remains the gold standard for understanding lithology and has evolved to include quantitative image analysis and cathodoluminescence. Petrographic data anchor well-log interpretation, validate seismic velocity models, and constrain paleoenvironmental and diagenetic histories.