Mapping the maturity of organic-rich shale with combined geochemical and geophysical data, Draupne Formation, Norwegian Continental Shelf

The evaluation of the interplay between kerogen maturation and total organic carbon (TOC) content within an organic-rich shale is critical to characterizing source rock shale's elastic behavior. We analysed a comprehensive database twenty-nine well logs, two 3D seismic surveys, geochemical data eighteen wells Draupne Formation in Norwegian North Sea. Upper Jurassic (Kimmeridgian) Shale found throughout Continental Shelf primary source, carrier, seal several oil gas fields. dataset explores broad range depths (2–5 km), contents (0–20 wt%), various states ranging from immature overmature. study relationship brittleness as matures. use calculated values Young's modulus Poisson's ratio. Academic industry-standard cutoffs are applied both TOC level. introduce here Organic Maturation Product (OMP) physics template, which incorporates any subsequent maturation. degree or ductility impacted directly by process, with lower having dampening effect on transition towards increasing brittleness. This template allows one classify nine categories, low high maturation, link these categories geomechanical properties. Seismic inversion surveys mapping utilizing OMP classification reveal how large-scale depositional environment diagenetic events influence placement quality broadly basin context • propose (OMP), analyzing proxy for stiffness shales. shows sedimentation diagenesis Shelf.