GES Week 01 Assignment - Summer 2021 Cretaceous Jurassic Stratigraphy Upper Lower Upper Middle Lower Tertiary Chalk Greensand/Gault Wealden Purbeck Portland Kimmeridge Clay Corallian Oxford Clay Kellaways Cornbrash/Forest Marble Great Oolite Inferior Colite Upper Lias Middle Lias Lower Lias Triassic Permian Upper Carboniferous Basement You have been asked by your manager to determine if there is oil located within the seismic section on the next page. Given: Interpretation of the top of the Purbeck Sandstone - possible reservoir rock Interpretation of the top of the Kimmeridge Clay-possible source rock or seal Interpretation of the top of the Corallian Limestone - possible reservoir rock Your tasks: 1. Finish interpreting the top of the Wealdon (RED line) - this is a shale 2. Interpret and label all faults 3. Label any anticlines or synclines 4. Are all of the elements present for a Play? 5. Draw arrows on your figure indicating potential migration pathways. 6. Where would you drill a wildcat well? Notes: 1. The results of seismic interpretation can be varied. It depends upon the person doing the interpretation so realize there may be more than one answer. 2. Deciding where to drill is a long and complex procedure that sometimes takes many years. Always have a second, or maybe third scenario in mind. 3. Not all exploration wells are successful, there is typically a less than 20% success rate that most oil and gas companies are comfortable with.
S TWT (ms) 0.000 100 200 300 Purbeck 400 Sandstone 500 600 700 Kimmeridge Clay 800 900 Corallian 1000 Limestone 1100 1200 CMP Interpretation of marker horizons 7000 Well Te 11000 12000 CMP 100 200 300 400 500 600 800 900 N 1000 1100 1200
Join a community of subject matter experts. Register for FREE to view solutions, replies, and use search function. Request answer by replying!