GEO 101 Lecture Notes - Lecture 14: Source Rock, Diagenesis, Petroleum Reservoir

• School: Stony Brook University
• Department: Geosciences
• Course: GEO 101
• Professor: Christiane Stidham

Document Summary

Form on shallow ocean floor or lake bed. Deposition of organic material such as plankton and algae. Organic material which is deposited must not be able to decompose, or no hydrocarbons can be generated requires anoxic environment. Ocean floor and lake bed also get deposition of fine-grain rock material shale. As sediment (such as the source rock) is buried under layers of overlying sediment, it is subjected to higher and higher temperature and pressure. Higher pressure and temperature result in diagenesis conversion from sediment to rock: used all across geology. Along with diagenesis occurs catagenesis (cid:858)c(cid:396)acki(cid:374)g(cid:859) p(cid:396)ocess (cid:449)hich co(cid:374)(cid:448)e(cid:396)ts o(cid:396)ga(cid:374)ic (cid:373)ate(cid:396)ial into hydrocarbons. Fou(cid:396) co(cid:374)ditio(cid:374) fo(cid:396) pet(cid:396)oleu(cid:373) deposit: ***classic old school t(cid:396)aditio(cid:374)al (cid:396)e(cid:395)ui(cid:396)e(cid:373)e(cid:374)ts! Do anymore due to lesser petroleum now*** (these four are in order of. Salt dome: petroleum gets trapped along sides and near top of dome. Stratigraphic trap: sedimentary stratum changes from on type to another and facilitates collection of oil and natural gas.