--> Integration of Seismic Inversion With Source Rock Evaluation Methods to the Study of the Middle to Late Jurassic Organic Rich Intervals in the Scotian Basin, Nova Scotia, Canada

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Integration of Seismic Inversion With Source Rock Evaluation Methods to the Study of the Middle to Late Jurassic Organic Rich Intervals in the Scotian Basin, Nova Scotia, Canada

Abstract

Source rocks are a fundamental element of an effective petroleum system and have been identified as a key risk factor in the Scotian Basin. Understanding the geochemical properties and distribution of known source rock intervals and identifying new organic rich intervals is key for future petroleum exploration of the Scotian Basin. The majority of the basin is underexplored with limited knowledge of vital petroleum system elements. This project is designed to investigate the extent and geochemical properties of known and potential Middle and Upper Jurassic source rocks within the Sable Sub-basin through seismic and petrophysical analysis. This project is a component of a larger study to develop new strategies to predict and define source rock characteristics and thermal maturity throughout the Scotian Basin. It focuses on the shales and carbonates of the Jurassic interval, a known time for prolific source rock deposition around the globe. Using seismic inversion and petrophysical total organic carbon (TOC) wireline log determination, organic rich intervals have been identified throughout the Sable Sub-basin. These intervals are mapped within the 3D seismic cube to understand the lateral variability of the source rocks. Understanding the paleoenvironmental conditions and burial history leading to organic matter production and preservation, combined with the lateral extents and TOC values of organic rich intervals, will decrease the uncertainty associated with the geological models constructed and improve the understanding of the viable petroleum systems.