Page 123 - Origin and Prediction of Abnormal Formation Pressures

SMECTITE-ILLITE TRANSFORMATIONS
pore pressure gradient in shale, qd,, and pore pressure gradient in reservoir rock,
0.0135
~
O
9
0.0167
~ o ~ o0.0187
e~0
21
9
900
O
q'~ ~
r
0.0 124
O
O
0.0137
o ~ o 0.01 46
O
O
9
15
tt~ r
.. +..a vies, in the Apsheron Archipelago, the South Apsheron Offshore Zone and the Baku Archipelago and Lower Kura region (after Buryakovsky et al., 1995, table 1, , Baku Archipelago and Lower Kura region South Apsheron Offshore Zone Vies qsh '$%h hsh Dies l)$h d%h r (MPa/m) (MPa/m) (%) (m) (MPa/m
9
o~ hsh (m) r 250 O Ig') r162 oO Ig'3
185
,---~ ,---~ I50
r 235
q'~ q'~ O
,.azZ
(MPa/m) ~.C~ oO ~ 0.0100 oO 0.0098
0.0108
0.01 I6
rlres
~<
.,-.~ Variation with depth (m) of average thickness of shales, h5h, shale porosity, &,, (MPa/m) 22
9 %h 0.01 0.0125 0.0120 0.01 10
Apsheron Archipelago dJsh (%) 12 8 5 3
TABLE 4-2 p. 207) Depth (m) hh (m) r 2000 O ~ 50 r162 "r 4000 40 3000 O ~ 30 q'~ 5000 O O 20
~
O