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	Petrografisk analys	Analys av borrhålsmätningar
Ämnesområde	Geovetenskap	Geovetenskap
Familj	Process / pipeline	Process / pipeline
Ursprungsår	1858	1940s
Upphovsperson	Henry Clifton Sorby	Guyod and Barnhart
Typ	compositional characterization pipeline	subsurface characterization pipeline
Ursprungskälla	Tucker, M. E. (2003). Sedimentary Rocks in the Field: A Color Guide (3rd ed.). John Wiley & Sons.	Asquith, G. B., & Gibson, C. R. (2004). Basic Well Log Analysis (2nd ed.). American Association of Petroleum Geologists.
Alias	microscopy analysis, thin section analysis, modal composition determination	wireline logging, borehole logging, petrophysical analysis
Närliggande	5	5
Sammanfattning	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.	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.