The application of well logging technology in stratigraphic deposition
DOI:
https://doi.org/10.63313/AERpc.2001Keywords:
Well logging technology, Interpretation of well logging data, Characteristics of well logging curves, Sedimentary faciesAbstract
Well logging data can be used to determine lithology and for stratigraphic division and correlation. Well logging technology primarily utilizes the geological and physical properties of rock formations, such as electrical conductivity, electrochemical properties, acoustic properties, and radioactivity, to measure their parameters. Spontaneous potential logging utilizes changes in the spontaneous potential curve to classify lithology; natural gamma logging employs gamma curves for lithology classification and stratigraphic correlation to determine shale content; density logging can accurately calculate porosity and distinguish the nature of various fluids in the reservoir; and acoustic logging can be used to delineate the boundary between sandstone and mudstone and to identify gas zones. Essentially, various well logging methods can only indirectly and conditionally reflect certain aspects of the geological characteristics of rock formations. To accurately and comprehensively understand the subsurface geological features and to discover and evaluate hydrocarbon reservoirs, it is necessary to combine multiple well logging methods and pay attention to drilling, mud logging, and other data. Utilizing well logging curve data not only allows for accurate stratigraphic lithology classification but also more vividly represents the depositional environment. By analyzing the shape of the well logging curves and various logging values, it is possible to determine the geometric morphology, lithology, lithofacies, sedimentary structures, ancient water flow and transport directions, and geochemical characteristics of the depositional facies.
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