Physical Properties of Rocks: A Workbook by J.H. Schön (Eds.)

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By J.H. Schön (Eds.)

'Physical houses of Rocks - a Workbook' is a symbiosis of a short description of actual basics of rock homes (based on commonplace experimental effects and appropriate theories and versions) with a advisor for sensible use of alternative theoretical techniques. For this objective a better half site includes a collection of version established equations in excel worksheets for functional software and coaching through the consumer to paintings along with his personal facts (or to ''play'' to be able to reveal the results of varied enter details and to illustrate the results of varied enter information in petrophysical paintings.

In precise chapters the matter of relationships among petrophysical parameters in line with quite a few version thoughts is gifted as a foundation for mixed interpretation. This half additionally comprises the author's 'structured model'. 

The workbook is end result of the the greater than forty years event of the writer in educating at universities and commercial classes.

  • Presents all useful appropriate houses of rock in a single volume
  • Experimental and theoretical basics in a scientific framework
  • Special specialise in relationships among properties

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Extra info for Physical Properties of Rocks: A Workbook

Example text

On the other hand, fractures significantly reduce mechanical rock properties. Most magmatic (intrusive) and metamorphic rocks have almost no intergranular porosity. Formed by crystallization, the grains intergrow tightly, leaving almost no void space. 001, most of which occurs as small irregular cavities that are remnants of the crystallization process. Tectonic and thermal stresses can create later fractures and cracks—they represent planar discontinuities, occupy a very small volume fraction (low porosity), but can create a connected network and result in permeability.

Porosity decreases as the clay content of the limestone increases. 9 demonstrates: ● that porosity decrease is strongly influenced by mineralogy; 28 Physical Properties of Rocks ● that clay content increases deformation sensitivity and accelerates porosity loss; that (in the example) dolomite shows a higher porosity but a smaller porosity decrease than limestone; the dolomite is more porous but also more rigid than the limestone; that straight lines in the semilogarithmic plot indicate in a first approximation an exponential equation.

Oil, gas), then the flow of the individual fluids interferes and the effective permeabilities of the individual fluids are less than absolute permeability. Effective permeability describes the flow of a fluid through the rock in presence of other pore fluids and depends on the saturation of the considered fluid. Relative permeability is defined as the ratio of effective permeability and absolute permeability; it varies between 0 and 1. For effective or relative permeability measurement in modern equipment, fluid saturation frequently is monitored with an X-ray scanner.

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