Grand Slam : A combination of logs or a computational procedure for calculating the depth of invasion and the resistivity of both invaded and uncontaminated zones, based on a dual-induction-laterolog and a proximity log or microlaterolog
George E. King Engineering, 5000 Oilfield Terms: A Glossary of Petroleum Engineering Terms, Abbreviations and Acronyms, US 2010. http://gekengineering.com/Downloads/Free_Downloads /Glossary_of_Petroleum_Engineering_Terms_25_August _2010.pdf, (Oil - Amer) {593}