Seismic Driven Sweet Spot Determination of a Shale Play – An Eagle Ford Example
Joanne Wang¹ and Duane Dopkin
To ensure a successful well in a shale play we must drill at the target which is favorable in fluid content, in-situ stress and rock properties. Due to their unique nature, shale plays have demonstrated challenges in reservoir exploration and production. Geoscientists have been searching for solutions that can determine and qualify the "sweet spots" in the shale formation, where the production and recovery rate are the highest. Because of its highly heterogeneous nature, identifying and ranking the "sweet spots" require a number of measurements to qualify them. Seismic data provides one of these measurements.
Seismic data provides valuable information for all stages of shale play exploration and production since it carries signatures related to lithology, fluid and in-situ stress. To transform the seismic data into the much needed reservoir quality information requires a support of a number of technologies and workflows.
"Sweet spots" are characterized with a number of determining factors: TOC (Total Organic Carbon); shale brittle/ductile quality and in-situ stress.
AAPG Search and Discovery Article #90207 © AAPG Geoscience Technology Workshop, Unconventionals Update, November 4-5, 2014, Austin, Texas