2 3 4 preferably determine ssp from a thick

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: n 3 Reference Articles •Fracture Gradient Prediction and Its Application in Oilfield Operations •Estimation of Formation Pressures From Electrical Surveys-Offshore Louisiana •Estimation of Formation Pressures from Log-Derived Shale Properties 230 Copyright(c) 2005 by Ali Ghalambor & Boyun Guo 115 Section 4 Logging Curves 231 1. 2. 3. 4. Preferably determine SSP from a thick, homogeneous bed using the shale base line from a good adjacent shale. Example of use of Chart SP-1: SSP=-87mv, T=300℉.Find from Chart (Rmf)e/(Rw)e=7.4. For predominately sodium chloride muds determine (Rmf)e as follows: a. if Rmf at 75°>0.1 ohm-m, correct Rmf to formation temperature using Chart Gen-9, and use (Rmf)e=0.85 Rmf. b. if Rmf at 75°<0.1 ohm-m, use Chart SP-2 to derive a value of (Rmf)e at formation temperature. Using results of Steps2 and 3, compute (Rw)e=(Rw)e / (Rmf)e /(Rw)e. Go to Chart SP-2 for conversion of (Rw)e to Rw at formation temperature. Copyright(c) 2005 by Ali Ghalambor & Boyun Guo 116 Fig.1 (Rw)e Determination from the SSP(Clean Formations) Fig.2 Copyright(c) 2005 by Ali Ghalambor & Boyun Guo 117 Fig.3 Rw VS. (Rw)e and Formation Tempe...
View Full Document

This document was uploaded on 03/28/2014.

Ask a homework question - tutors are online