By Knut Bjørlykke
This finished textbook offers an summary of petroleum geoscience for geologists energetic within the petroleum undefined, whereas additionally providing an invaluable advisor for college students drawn to environmental geology, engineering geology and different facets of sedimentary geology. during this moment version, new chapters were additional and others extended, masking geophysical equipment quite often and electromagnetic exploration equipment specifically, in addition to reservoir modeling and construction, unconventional assets and functional petroleum exploration.
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Additional resources for Petroleum Geoscience: From Sedimentary Environments to Rock Physics
Sample text
This involves modelling based on the kinetics and temperature history. Before drilling, the position of a trap and a reservoir rock has to be determined. The porosity and permeability of the reservoir rock is critical. If the porosity is 30% it may at the best contain about 250 l of oil and 50 l of water for each m3 of rock, and assuming 50% recovery, 125 l of oil can be produced. If the porosity is only 15% it may contain about 100 l of oil and the recovery may then be lower so that less than 50 l will be produced.
A barrier island forms a separate accumulation of sand where the associated mudstones (shales) may represent both source rocks and cap rocks halotectonic movements have formed dome structures in the Chalk, for example in the Ekofisk area. (c) Growth Anticlines These are dome-like structures formed when part of a basin subsides more slowly than its surroundings, resulting in least sedimentation on the highest part. The sediment thickness decreases towards the dome centre, which also compacts less than the adjacent thicker sediments and thus contributes to the formation of an anticlinal structure.
Research based on economic interests is also useful from a purely scientific point of view, because it often focuses on particular questions which may be quite fundamental. Petroleum geology requires close teamwork between reservoir engineers and geologists, to establish in great detail the geometry and distribution of porosity and permeability in reservoir rocks. We also need very much to know more about the physical and chemical properties of reservoir rocks, for reasons which are discussed at the end of the book.