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The AAPG/Datapages Combined Publications Database
Houston Geological Society Bulletin
Abstract
Abstract: A Petroleum
System's
Lifecycle
Hatter's Pond Field, Mobile County, Alabama
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By
Petroleum system
assessment has
become a means to establish the temporal
and spatial inter-relationships of geologic
factors which result in a hydrocarbon
accumulation. By analogy, it is
'geologic bookkeeping.' Our understanding
of a petroleum
system
undergoes
a series of evolutionary changes
from pre-discovery through abandonment
phases of a field, parallel to the
development of a 'reservoir lifecycle'
model. Data made available during each
stage of a
system's
lifecycle (i.e., pre-discovery, discovery, development, and
abandonment), when integrated with the
available geologic model enhances the
focus and effectiveness of the exploratory
and development programs. The petroleum
system
evolves from a speculative to
either a known or hypothetical
system
depending on the data which become
available. An example of such a lifecycle
is presented for the Hatter's Pond field.
The initial exploration concept for
the Hatter's Pond prospect was based on
the Jay Field of Florida, which had been
discovered just a few years earlier. A
structural
anomaly was identified using
seismic data Hydrocarbon source rocks
were assumed to be present in the
Smackover Fm. as a consequence of
stratigraphic analysis, although their existence had not been proven. The extent
of hydrocarbon generation and preservation
was estimated using numeric modeling.
Initially, the reservoir objective was
Smackover regressive carbonate grainstones.
Newly acquired data from the Getty Peter Klein 3-14 No. 1 discovery well were merged with the original exploration model. The data confirmed the presence of a source and dramatically altered the understanding of the reservoir by establishing underlying Norphlet sandstones as a primary target. Produced fluids suggested cross-formational flow.
Data obtained during the development phase resulted in continuous
refinement of trap
geometry, connectivity
of pay-zones, and development of
porosity and permeability models.
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