petroleum geology 3 min read
Meteoric Water Flow and Diagenesis
The introduction of meteoric water has a profound effect on carbonate sediments and their potential as reservoir rocks. A proportion…
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petroleum geology 3 min read
Pelagic Carbonate
Pelagic carbonate deposits consist largely of planktonic organisms (coccolithophores, foraminifera, pteropods etc.) which live in the upper part of the…
petroleum geology 3 min read
Modern Environments of Carbonate Sedimentation
From a sedimentological point of view a reef may be defined as a laterally restricted body of carbonate rock whose…
petroleum geology 2 min read
Geological Range
Foraminifera range from the Cambrian to Recent. Most of the Lower and Middle Palaeozoic forms had an agglutinated test whereas…
petroleum geology 3 min read
Geochemistry of Carbonate Minerals
Carbonate minerals consist of CO2− 3 and one or more cations. The most common cations in carbonate minerals together with…
petroleum geology 3 min read
Practical Predictions of Reservoir Quality and Porosity Depth Curves
The oil industry has a practical need to be able to predict the properties of reservoir rocks ahead of drilling.…
petroleum geology 2 min read
Prediction of Reservoir Quality
It is important to distinguish between sandstones of different primary composition: Volcanoclastic sandstones may vary greatly in composition depending on…
petroleum geology 3 min read
Meteoric Water Flow and Mineral Dissolution
Meteoric water is rainwater which infiltrates the ground. Initially this water is distilled water and therefore undersaturated with respect to…
petroleum geology 3 min read
Importance of Biogenic Activity
Bioturbation plays an important role in changing the textural composition of the sediments after deposition. The burrowing organisms eat mud…
petroleum geology 2 min read
Mechanical Weathering
Igneous and metamorphic rocks which have been formed at many km depth at higher temperatures and pressures are not stable…
petroleum geology 4 min read
Clay Minerals
A number of minerals are referred to as clay minerals because they predominantly occur in the finest grain-size fraction (clay…
petroleum geology 4 min read
Isotopes
A number of elements occur in nature as different isotopes: the atomic number (protons) is constant but there are different…
