GEOL 404 1st Edition Lecture 14 Outline of Current Lecture This is the first lecture after the midterm. Outline of Current Lecture I. Formation of PetroleumII. KerogenIII. Catagenesis or Thermal MaturationCurrent LectureI. Formation of Petroleuma. Organic matter, sediment supply and rich source rock is required b. Organic matter can go throughc. Processesi. Diagenesis - the transformation of suitable types of organic matter to the complex polymers we call kerogenii. Catagenesis - is the cooking or maturation process which kerogen yieldsiii. Metagenesis - is the stage of over cooking or transforming of kerogen to carbonII. Kerogena. Under microscope kerogen appears as disseminated organic fragmentsb. The material is structured as plant tissue fragments, spores, algae c. TYPE 1 (Alginate) - Found in Marine environmentsd. TYPE 3 (Vitrinite) - Found in Terestrial----Professor Skipped Slides-----III. Catagenesis or Thermal Maturationa. Kinetic Schemesi. Kinetic models are based on the classic formulation of first order kinematicsii. dxi/dt=-ki*xib. Change in Kerogen/Change in time = -Reaction rate Constant * Kerogeni. ki=A*EXP(-Ei/RT)*Ki - reaction rate constant related to reaction These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.*A- pre-exponential or frequency factor*Ei- The activation energy related to reaction*R- Ideal gas constant*T- Absolute Tempii. ln(c/T^2)=ln(A*R/E)-(E/R*T)c. Hydrocarbonsi. LIght 30+, Medium 20-30, Heavy 10-20 API Gravityii. Diagenesis contains immature organic matter that isn't useful to us. iii. Oil is generated in Catagenesis, at Temperatres 60-175 Degrees Celsius. iv. The higher the temperature = Lighter oil. v. The best oil is around 100 degrees Celsius, but, the pediotemperature is essential to figuring out the actual oil window. vi. Wet gas is from Temperatures 175-225 vii. Dry gas is from 225-315. Short Lecture --- Stopped --- Very short lecture class was released
View Full Document
Unlocking...