Atlas of Log Responses Lithology
Gamma Ray & SP
Resistivity Resistivity Bulk Density & Oil Based Mud Water Based Mud Ne ut ut ro ro n P or or os osi ty ty
Magnetic Resonance
A co co us ust ic ic
T2 Distribution
0.5
d n u o B y a l C
Borehole Image
2 00 0
d n u o B y r a l l i s p a a C G
Low <= Amplitude/ Resistivity => High l i O I P A 0 3
Shale Gas Sandstone
Shaly Sand Laminated Pay
Rh
Rv
Oil Salt Water
Tuff
Backup
Marine Shale
Limestone
Marl
Dolomite
Fractured
Loss of Secondary Porosity
Conductive Fractures
RA Mineral Fractures
Anhydrite NaCI Salt KCI Salt
Gypsum
Anisotropic (Aeolian) Sand
Rh
Rv
Coal
Sandstone
Gas Oil Fresh Water
Anisotropic Shale
Rh
Rv
Granite
Lithology Sandstone
General Log Matrix Responses GR
Density
Neutron
Acoustic
Resistivity
PE
Low
2.65
-4
53
High
1.81 5.08
(UnlessRAmin)
The Changing Face of Formation Evaluation
Limestone
Low
2.71
0
47.5
High
Shale
High
2.2-2.7
High
50-150
low
(watercontent)
(watercontent)
(watercontent)
(watercontent)
2.87
+4
43
High
3.14 5.06
Dolomite
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Low
Anhydrite Salt Water
50
V.High
Low
2.03
-3
67
V.High
(UnlessKsalt)
V.Low
(1.87)
(-2)
(74)
1-1.1
100
180-190
0
2.98
(
-1
(salt&temp)
WE CANNOT, AND WE DO NOT GUARANTEE THE ACCURACY OR CORRECTNESS OF ANY INFORMATION ON THIS CHART. WE SHALL NOT BE LIABLE OR RESPONSIBLE FOR ANY LOSS, COST, DAMAGES OR EXPENSES WHATSOEVER INCURRED OR SUSTAINED BY THE CUSTOMER RESULTING FROM THIS INFORMATION.
Compiled by Geoff Page and Simon Miller, Graphic design by WendyMcLachlan
1-5
(higher if U)
Oil
0
Gas
0
4.65 0 - infinite (salt & temp)
0.6-1.0
70-100
(api) 2
(H2 index)
210-240
(
(api)
0.2-0.5
10-50
~1000
2 (pressure)
(H2 index)
0.36 (+salt)
V.High
Low
V.High
Low
Baker Atlas INTEQ FORMATION EVALUATION
© 2002 Baker Hughes Incorporated All rights reserved
