Petrography, Compositional analysis and Sedimentology are used in the interpretation of basic and special core analyses. Petro-graphic and compositional data are critical in the evaluation of petro-physical, completion, and drilling engineering data, e.g., mineralogy, clay morphology and distribution, rock texture and fabric, and formation-damage potential technique, details of pore in-fills in sandstones, matrix in shales, and fine-scale inter-layering of clays is revealed.
Sedimentology is a very broad (mostly qualitative) geo-science dealing with the study of sedimentary rocks and the processes by which they are formed. Examination of full-diameter core is useful in determining the depositional environment of a formation and with other data can be used to explain facies rel ationships. Understanding the genesis of sedimentary structures, textural features, and porosity evolution adds a new dimension to the quantitative assessment of physical properties. Integration of Sedimentology into the rock characterization program adds valuable insight to the design of core preservation methods, core sampling procedures, and laboratory tests.
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