See more from this Division: Gulf Coast Association of Geological Societies
See more from this Session: Sedimentology and Stratigraphy
Abstract:
First, based on detailed sedimentologic descriptions for the cored intervals, grain size analyses, whole core x-ray scans, well log patterns, and correlations, we identified four main reservoir facies within two principal Miocene intervals: channel-bypass, thick-bedded amalgamated sheets (axial and marginal), and thin-bedded layered sheets. Second, to distribute facies within time-correlative packages, we use depositional models based on Gulf of Mexico shallow-seismic analogs of distributary channel complexes. While the lower Miocene interval characteristics are more akin to confined, proximal portions of a frontal splay, the middle Miocene interval contains characteristics of the more unconfined medial portions.
Thirdly, using whole core data, we examine a wide range of petrophysical attributes to recognize unique combinations of petrophysical properties for each key reservoir facies. This provides valuable insight for choosing log-based curves used for identifying facies within uncored wells.
To date, pressure transient analysis of production data from the two main intervals are consistent with our facies interpretations. The more sheet-like interval shows few barriers while the more channelized interval suggests a higher degree of complexity.
The resulting improved facies classification scheme provides a more useful basis for routine reservoir modeling and field management.
See more from this Division: Gulf Coast Association of Geological Societies
See more from this Session: Sedimentology and Stratigraphy