Orientacion

República Bolivariana de Venezuela
Ministerio del Poder Popular para la Educación
U.E. Padre Luis Antonio Ormieres “Fe y Alegría”
Maturin – Edo – Monagas

Teacher:Made by:
Rubén Marcano Diannybel SifontesLienny Torrealba
YelzimarRebolledo
Tania VelazcoPolango

The Origin of Petroleum
Petroleum is was formed as a result of the laying down of organisms such as plankton and bacteria millions of years ago on the sea floor. Themain differences between coal and oil are that
Coal was formed from land plant debris decaying under mildly reducing atmospheres. Oil was formed from sea plants and animals under strongly reducingconditions.
Coal seams remained where deposited. Oil migrates under the effect of temperature and pressure so that the location of the deposit is not the location of the initial debris accumulation.Over the years a layer of partially decomposed material was formed (source rock horizon) which was subsequently covered with layers of mud / sediment (or strata). Subsequent compaction of this matterforms "kerogen", a complex mixture of hydrocarbons which under special conditions of high pressure and temperature produces oil and gas. Temperature, pressure and earth movement cause the oil tomigrate to favourable locations. That is porous sedimentary rock called "Reservoir Rocks".
Because these substances are less dense than their surrounding rocks they tend to rise until they reach...