Petroleum Related Rock Mechanics, 2nd Edition

Appendix E: List of Symbols

This is a list of most of the symbols used in this book. General mathematical symbols, some basic symbols such as x, r, etc., and a few symbols used only where they are defined are not included.

The order is alphabetical, in the order symbols, script letters, Greek letters and Latin letters. Capital letters precede lowercase letters. Where applicable, the list shows the number of the first equation where a symbol is used.

Symbol

First use

Description

Define something

~

Roughly equal to, coarser than ?

(2.9)

Attraction

(1.72)

Second deviatoric invariant of strain

(1.73)

Third deviatoric invariant of strain

(9.14)

Osmotic potential

? ij

(1.62)

Shear strain, i ? j

?

(1.250)

Creep parameter

?

(2.74)

Angle of dilatancy

?

(5.43)

Acoustic attenuation

?

(1.168)

Biot s poroelastic parameter

? SF

(5.48)

Acoustic attenuation, solid friction

? T

(1.116)

Coefficient of linear thermal expansion

? T, V

Coefficient of volumetric thermal expansion

? Th

(5.67)

Thomsen s alpha

? scatt .

(5.49)

Acoustic attenuation, scattering

?

(2.10)

Failure angle

?

(D.79)

Non-Darcy flow coefficient

? Th

(5.68)

Thomsen s beta

? w

(2.80)

Failure angle, weak plane

?

(5.46)

Acoustic loss tangent

? Th

(5.66)

Thomsen s delta

?

(1.202)

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