This course is divided into two parts. The first part, on Petrophysical Analysis, is designed to encompass the spectrum of information that can be derived from examination of standard open-hole logs. Basic petrophysical interpretation to calculate porosity, shale volume, fluid saturation, grain density, and permeability will be covered. Advanced analysis will include detailed examination of porosity log responses, relations between porosity and water saturation, and a discussion of capillary characteristics.
The second part, on Integrated Approaches, provides an overview of key factors controlling oil and gas distribution in carbonate reservoirs in the greater Midcontinent USA. A top down approach is taken starting with regional structural and tectonic framework followed by sequence stratigraphic framework and reservoir architecture through analysis of core, well, and seismic data. A description of common reservoir lithofacies and their recent analogs is followed by a review of petrofacies concept and pore typing using petrophysical techniques grounded on core studies.
Case studies will demonstrate integrated approaches to reservoir characterization and modeling of 1) ooid and grainstone shoals; 2) phylloid algal mounds and related lithofacies; 3) low resistivity microporous chert and dolomitic reservoirs, and 4) karst and fracture modified reservoirs. Methodologies and workflows reviewed in these case studies include geosteering and evaluation of horizontal wells and optimizing carbon storage utilization and management. The overall goal of this section is to provide tools for efficient and effective re-exploration and development.