Chromastratigraphy™ Analysis and Correlation
Chromastratigraphy™ (a proprietary Ellington & Associates technique) extends the basics of ChromaLog™ analysis from single-site logging and formation identification
into a modern system of stratigraphic correlation and zonation through the use of chromatic variation. It has been used successfully in onshore shale plays in the US,
Europe, and Middle East, and in offshore plays of the Gulf of Mexico, SE Asia and West Africa.
Depositional sources into a basin vary through time, capturing climatic variation and constituent changes to the sedimentary inputs. The use of color is a rapid and
accurate tool for identifying key horizons and changes in lithology, particularly recorded in shales, and is effective for inter-well correlations in both local and
basin-wide settings.
As with multi-attribute seismic analysis, the combination of several data types can more clearly define highly prospective drilling targets within indistinct
formations.
ChromaLog™, used in combination with elemental, microfossil and total organic carbon (TOC) data, can guide interpretation of “ratty” shales to identify reservoir
zones within a larger shale package.
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