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Core description and interpretation are key components to
regional and field studies because depositional facies and
stratigraphic architecture usually control porosity and permeability.
A fundamental understanding of facies and the stratigraphic
architecture can only come from accurate core descriptions
and interpretations.
At Strata-Search, LLC we graphically log and interpret cores
and calibrate them to well logs. Our artistically rendered
graphic format records depositional textures, major grain
types for carbonates, sedimentary structures, grain size,
sorting, lithologic composition and porosity. We use this
information to interpret the depositional environments and
water depth.
Stratigraphers have learned that there is a natural bundling,
or ordering, of stratigraphic units from cycles, which are
the fundamental building blocks of stratigraphic successions,
into cycle sets, high-frequency sequences, sequence sets and
composite sequences. This bundling reflects the natural hierarchical
development of sequences through base-level transit cycles
of varying frequency (short-term to long-term). Core studies
are ideally suited to the identification of these naturally
developed cycles and an analysis of their hierarchy. Thus,
a major part of our core studies is devoted to an analysis
of 2-d stacking patterns of facies in order to develop a rock-based
sequence stratigraphic framework. We identify facies successions,
or cycles, and the important hiatal surfaces (exposure, erosional,
sediment-starved, firmgrounds and hardgrounds) that bound
stratal units, or cycles.
In order to capture detail, cores are usually logged at a
scale of 1:50 to 1:100. Where necessary, petrographic work
can be done to serve as a check and augment the megascopic
descriptions. When requested, we can convert the core descriptions
into a digital database.
For more
information: Please contact
our office by telephone at 512-965-1201 or e-mail.
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