• Petroleum - English

    Petroleum Traps part 1

    In addition to the requirement that source rock exists for the generation of hydrocarbons, and that reservoir rock exists for the storage and production of the generated hydrocarbons, traps must also exist to trap, or seal, the hydrocarbon in place forming a hydrocarbon reservoir. The fluids of the subsurface migrate according to density. As previously discussed, the dominant fluids present or potentially present are hydrocarbon gas, hydrocarbon liquid, and saltwater. Since the hydrocarbons are less dense than the saltwater, they will tend to migrate upward to the surface, displacing the heavier water down elevation. These fluids will continue to migrate until they encounter impermeable rock, which will serve as a…

  • Petroleum - English

    Petroleum Traps part 2

     1. pinchout: are the result of the changes in deposition of the sediment. Thick layers of mud are covered by thinner layers of sand from migrating shoreline, or by the sand deposited by large rivers. As sea level changes, or rivers migrate, the different sand and mud layers are interwoven creating lenses or pinch-outs. These sand layers allow the petroleum to accumulate and the mud rock layers trap the petroleum. can create traps by burying truncated sandstone or limestone layers with layers of mudstone.  2. Carbonate Reef: are great places to trap oil. The open cavities between the corals create excellent reservoirs, and when the reef is buried by mud,…