Fundamentals of basin and petroleum systems modeling by Thomas Hantschel

By Thomas Hantschel

This textual content includes the 1st accomplished presentation of equipment and algorithms utilized in basin modeling. It offers geoscientists and geophysicists with an in depth in-depth view of the speculation in the back of the versions. warmth circulate research, chemical kinetics of petroleum iteration, strain research, PVT modeling and a number of other fluid circulation types are mentioned intimately. complex themes reminiscent of probabilistic equipment for danger review or new techniques similar to modeling of migration with invasion percolation also are incorporated. entire lists of rock and fluid homes and parameters of geochemical kinetics make the publication a different reference in geological strategy modeling.

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8). In practice, compaction laws on the basis of Terzaghi’s effective stress definition are written in terms of porosity loss versus the vertical component of the effective stress σz . The usage of porosity change instead of the volumetric bulk strain neglects volume changes of the solid matrix which are small. The restriction to the vertical effective stress means that a fixed ratio between horizontal and vertical stresses is assumed. The corresponding vertical total stress can then be simply approximated by the overburden sediment load pressure pl .

Practical solutions can, on the other hand, only be obtained for discretized models. A mesher generates grids with the cells as the smallest volumetric units of the geological model. The basin or region of interest is assumed to be covered continuously with cells. Every physical or geological quantity such as temperature, pressure, saturation, concentration, permeability, thermal conductivity, etc. is well defined in the cell as a single, effective or average value. Furthermore, the value can vary continuously from cell to cell at least within parts of the structure.

Transport processes for water (pore pressure and compaction), heat (temperature calculation), and petroleum (migration and diffusion) can be formulated in terms of flow equations with appropriate conservation equations for mass or energy which finally yield diffusion type differential equations. A sedimentary basin is a sequence of geological layers. Each layer was deposited in a given stratigraphical event and is subdivided into regions of similar facies. A facies type specifies the lithological rock type and the organic facies.

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