Ebook Free Download |Petroleum Engin eering Handbook | Since the original reservoir Symbols Standard was established in 1956, the principles used in the selection
of additional symbols have been as follows. Use single letters only for the main letter symbols. This is the universal practice of the American Natl. Standards Inst. (ANSI), the Intl. Organization for Standardization (ISO), and the Intl. Union of Pure and Applied Physics (IUPAP) in more then 20 formal standards adopted by them for letter symbols used in mathematical equations. (B) Make available single and multiple subscripts to the main letter symbols to the extent necessary for clarity.
of additional symbols have been as follows. Use single letters only for the main letter symbols. This is the universal practice of the American Natl. Standards Inst. (ANSI), the Intl. Organization for Standardization (ISO), and the Intl. Union of Pure and Applied Physics (IUPAP) in more then 20 formal standards adopted by them for letter symbols used in mathematical equations. (B) Make available single and multiple subscripts to the main letter symbols to the extent necessary for clarity.
Multiple letters, such as abbreviations, are prohibited for use as the main symbol (kernel) for a quantity. A few exceptions are some traditional mathematical symbols, such as log, ln, and lim. Thus, quantities that are sometimes represented by abbreviations in textual material, tables, or graphs are required in the SPE Symbols Standard to have single-letter kernels. Examples are gas/oil ratio (GOR), bottomhole pressure (BHP), spontaneous potential (SP), and static SP (SSP), which have the following SPE standard symbols: R, pbh, ESP, and ESSP, respectively. Adopt the letter symbols of original or prior author usage, where not in conflict with Principles.
Adopt letter symbols consistent or parallel with the existing SPE Symbols Standard, minimizing conflicts with that Standard. Where pertinent, adopt the symbols already standardized by such authorities as ANSI, ISO, or IUPAP (see Principle 1); minimize conflicts with these standards. Limit the list principally to basic quantities, avoiding symbols and subscripts for combinations, reciprocals, special conditions, etc. Use initial letters of materials, phase, processes, etc., for symbols and subscripts; they are suggestive and easily remembered. Choose symbols that can be readily handwritten, typed, and printed
Adopt letter symbols consistent or parallel with the existing SPE Symbols Standard, minimizing conflicts with that Standard. Where pertinent, adopt the symbols already standardized by such authorities as ANSI, ISO, or IUPAP (see Principle 1); minimize conflicts with these standards. Limit the list principally to basic quantities, avoiding symbols and subscripts for combinations, reciprocals, special conditions, etc. Use initial letters of materials, phase, processes, etc., for symbols and subscripts; they are suggestive and easily remembered. Choose symbols that can be readily handwritten, typed, and printed
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