Regoresources, LLC
DT vs. Depth Plot
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Details on the DT (velocity) variation, lithologic variety and organization, general trends of parameter variation, etc. in a 125' window to identify the microenvironment of deposition
of these sediments.
DT vs. Depth Plot showing the contact between two main groups of sediments. The most variable group
(vertical blue dotted line) was underlying the more stable group in the first DT/Depth plot and in this case it is overlying it. Details vary substantially between the two cross plots.
The velocity/depth plot for most of the well allows us to start considering the gross picture without disregarding the details contained in the two DT/Depth plots shown below.
At this point we start deciding the type of stratigraphic model that may include thicker sediment packages to unravel the whole historic evolution of the rock column under study.
Once the detail is studied and understood on specific depth windows, the results are upscale areally to include a larger part or the whole basin, and vertically, to include the whole column drilled by the well.
This upscaling procedure will set the last stage of the evaluation that will include the quality and logic of the well-to-well correlation (with an understanding of lateral facies changes) and the geologic evolution of such column that will include a link with seismic and a careful revisiting of existent structural models.
Although we emphasize the identification of sedimentary processes towards the recognition of the particular sedimentary environment, we also cover other aspects related to an enrichment of knowledge on
the elements of the Petroleum System.
As data base we use the most abundant type of information in the oil industry: the wireline logs; each curve of a well has a message that we use. Availability of conventional cores is most welcome because
they allow a proper wireline curve calibration for further interpretation.
We also use seismic in our evaluation because that is the best tool to acquire knowledge in areas between existing wells. From synthetic logs to identification of "geobodies", to the estimation of hydrocarbon "in place" volume, to the intergration of information from different sources.