Methods for identifying fluid types of underground formations

摘要: A method of identifying the fluid type subterranean formations according to correlation between variation trend electrical resistivity with depth downhole in a borehole and porosity same borehole. The includes steps of: a) determining rate change parameter (such as deep resistivity) formation surrounding borehole; b) total and/or free measured by nuclear magnetic resonance technique) c) comparison such for given d) using determine nature at that or window downhole.