Page 279 - Well Logging and Formation Evaluation

Useful Conversion Units and Constants 269

U (barn/cc) 4.79 13.77 17.58 8.69 4.41 4.32 9.00 14.95 0.96 0.11–0.12 Low

g/cc 0.95–0.97
r e 2.65 2.71 2.79 2.52 2.41 2.12 2.86 2.96 1.185 0.1–0.5

Pe 3.1–3.2 0.12–0.13
1.8 5.1 6.3 1–5 1–5 1–5 5–5.1 4.65 0.36 Low

Resistivity (ohms) High High Low Low Low Low High High High 0–• Very high Very high

Table 6.1 AC (ms/ft) 51–56 44–48 50–150 50–150 50–150 50–150 39–44 45–55 180–190 189 210–240 500–1500

CNL (NPU) -5 to -3 0 30–40 30–40 30–40 30–40 2–6 0 100 100 70–100 10–50

Rho b (g/cc) 2.65 2.71 2.79 2.52 2.41 2.12 2.88 2.98 2.03 1–1.1 0.60–1.0 0.1–0.5

GR (API) Low Low High High High High Low Low Low 0 0 0

Sandstone matrix Limestone matrix Montmorillonite

Lithology Chlorite Illite Kaolinite Dolomite Anhydrite Salt Brine Oil Gas