By Knut Bjorlykke

ISBN-10: 3642023312

ISBN-13: 9783642023316

Petroleum geoscience includes these geoscientific disciplines that are of maximum value for the exploration and restoration of oil and gasoline. those contain petroleum geology, of which sedimentary geology is the most starting place in addition to the contextual and editing rules of nearby, tectonic and structural geology. also, biostratigraphy and micropalaeontology, natural geochemistry, and geophysical exploration and creation options are all vital instruments for petroleum geoscientists within the twenty first century. This finished textbook current an outline of petroleum geoscience for geologists destined for the petroleum undefined. it's going to even be precious for college kids drawn to environmental geology, engineering geology and different points of sedimentary geology

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

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In order to be able to describe sedimentary rocks, or to understand such descriptions, it is necessary to familiarise oneself with quite an extensive nomenclature. There are specialised names for types of sedimentary structures, grain-size distributions and mineralogical composition of sediments. We also have a genetic nomenclature, which names rock types according to the particular way in which we think they have formed. Examples of these are fluvial sediments (which are deposited by rivers) and aeolian (air-borne) sediments.

1 Introduction to Petroleum Geology For an oil field to be capable of full production, several wells are normally required. Up to 1990–1995 most of the exploration wells and production wells were nearly vertical. Horizontal barriers due to changes in facies or faults could then be critical barriers during production. It was difficult to produce oil from thin sandstones or carbonate beds because of vertical flow of water from below or gas from above. Onshore this could be compensated for by having a dense well spacing but offshore that would be too expensive.

When drilling commences at the surface, the diameter of the well may be 20"–30" (50–75 cm), but decreases downwards to 3"–6" (7–15 cm) at great depths. Normally a roller bit is used, which crushes the rock into small pieces (about 2–5 mm) called cuttings. Core samples are only taken when drilling through especially important rock strata (usually reservoir rocks) where large intact samples are needed for detailed examination. A circular diamond core drill bit must then be used. This takes time and costs a lot more per running metre, as the entire drill string has to be recovered to get each core section to the surface.

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Petroleum Geoscience: From Sedimentary Environments to Rock Physics by Knut Bjorlykke


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