... Oil & Gas Modeling & Simulation gypsum mineralogy interpretation anhydrite dolostone Symposium lithology porosity PEF dncp chart limestone formation evaluation nuclear parameter reservoir lithology SPWLA 48th Annual Logging Symposium, June 3-6, 2007 NUCLEAR PARAMETERS OF ARAB...

... ABSTRACT NMR spectroscopy has particular advantages in petrophysical measurements of tight, gypsum-bearing carbonates, where the nondestructive method eliminates problems of extremely slow and incomplete extraction and the high-temperature dehydration of minerals such as gypsum...

... for identifying and coping with one of these minerals, gypsum, which is sometimes present in a potentially productive reservoir. Some of the more frequently used methods will be discussed in the hope that new insight will be gained into their use in bulk volume mineral calculation. A new method of considering...

... and dolomite, which are followed by gypsum. This in turn is followed by halite, which has the greatest range of deposition of the numerous chloride and sulfate salts and which is present until complete evaporation has occurred. The most readily soluble salts and last to precipitate are the potassium...

... evaluation hydrogen well logging porosity measurement gypsum instrument Neutron log epithermal neutron log Upstream Oil & Gas borehole shale formation evaluation matrix equation acoustic log FORMATIONEVALUATIONWITH NUCIEARAND ACOUSTICLOGS F. Lebreton,A. H. Youmans,:H.I. Oshryand B. F...

... aspects of reservoir interpretation. Hydrogen bound by water of crystallization in gypsum produces high apparent porosities on the neutron survey. Only recently have analytical methods been employed with attempt to eliminate these effects in core analysis. Anhydrite and gypsum may produce porosity errors...