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•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
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...
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This document was uploaded on 03/28/2014.
- Fall '14