Petroleum Geoscience: From Sedimentary Environments to Rock by Knut Bjørlykke

By Knut Bjørlykke

This accomplished textbook provides an outline of petroleum geoscience for geologists lively within the petroleum undefined, whereas additionally delivering an invaluable advisor for college kids attracted to environmental geology, engineering geology and different features of sedimentary geology. during this moment version, new chapters were further and others multiplied, overlaying geophysical equipment commonly and electromagnetic exploration tools particularly, in addition to reservoir modeling and creation, unconventional assets and useful petroleum exploration.

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Extra resources for Petroleum Geoscience: From Sedimentary Environments to Rock Physics

Sample text

The ratio between the intervals with high enough porosity and permeability to be produced (net or pay), and the total sequence (gross), will be mostly determined by the primary facies relationships. The net/gross ratio is often taken to be approximately equal to the sand/shale ratio but even at moderate burial depths many sandstones are not reservoir rocks, due to poor sorting or carbonate cement. Aeolian dunes also have specific external geometries and there are many different types. Here the net/gross will be very high.

Whereas sand grains, particularly medium to corresponding in size to the quartz crystals in the coarse sand, will rapidly settle from suspension and be granite, and clay (kaolinite, smectite, illite) formed deposited on the beach again, fine sand, silt and clay through weathering of the feldspars. Weathering of will remain in suspension longer. This finer material basic rocks (basalts and gabbros) will produce almost will be transported further out and at a depth of some exclusively clay minerals, and practically no sand metres (1–50 m), depending on how strong the waves grains.

The sequence of interpretation in studies of older sedimentary rocks is thus: description of sedimentary rock → processes → environment. Applied geology has always been important, even for purely scientific research. The interests of economic recovery of raw materials from sedimentary rocks create a demand for sedimentologists and sedimentological research. Exploration for and recovery of raw materials also provide important scientific information. Sedimentary rocks contain raw materials of considerably greater value than those we find in metamorphic and eruptive rocks.

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