Page 230 - Origin and Prediction of Abnormal Formation Pressures

1 rn 0 4 2 g > z 0 9 m F ia m V] z ia m 0 1 5 5 5 h) S

L%d?%L ,Je~c/,Jd,~d (1 13 - 1)8 II 021 I Z - 0.032 - - 049 11 16 2 2 O 070 - 11 9 m - 14 (1 (134 - - - - 15 080 0 - - - 1.8 -- 050 0 12 0 044 - - - -

Abnormality 0.10 0.10 0.40 0.33 0.33 0.20 0.15 0.26 0.32 0.08 0.16 0.07 0.10 0.17 0.17 0.10 0.32 0.36 0.14 0.09 0.18 0.07 0.06 0.11 0.15 0.08

phyd/pahyd 1.18 1.24 1.18 1.18 1.18 1.24 1.14 1.14 1.18 1.18 1.14 1.18 1.18 1.24 1.24 1.18 1.08 1.24 1.18 I .24 1.24 1.12 1.18 1.14 1.10 1.08

pie,/prhyd 1.28 1.34 1.58 1.51 1.51 1.44 1.29 1.40 .SO 1 1.26 1.30 1.25 1.28 1.41 1.41 1.28 1.40 1.60 1.32 1.33 1.42 1.19 1.24 1.25 1.25 1.16

1985, table I) Initial reservoir pressure (MPa) 44.4 38.0 59.5 57.7 67.6 42.0 38.6 423 71.6 45.8 42.0 52.3 57.6 59.9 54.6 59.0 26.6 44.0 48.6 43.5 52.4 32.5 55.6 40.4 26.1 21.8

Depth to O/W contact (m) 3535 3535 3910 3910 - - 3852 3790 - 3768 - 4386 - - 3855 - 2275 - - - - 3001 - - - -
Some data on overpressured formations of the northern Pripyatskiy Deep (after Zavgorodniy and Pakhol'chuk,

Saturation type Oil Water + oil Oil Oil Water Gas-condensate Oil Oil Water Oil Water Oil Oil Water Oil Water Oil Water Water Water Oil Oil Oil Water Water Water = excess pressure.

Depth (m) 3450 2845 3770 3800 4477 2909 3000 3031 4770 3622 3233 4188 4506 4243 4844 4604 1900 2740 3664 3260 3685 2737 4479 3235 2083 1877

Horizon Semiluksky Zadonsky Voronezhsky Semiluksky Semiluksky Zadonsky Semiluksky Voronezhsky Semiluksky Voronezhsky Semiluksky Semiluksky Voronezhsky Zadonsky Zadonsky Semiluksky Zadonsky Zadonsky Sargaevsky + Pashiysky Zadonsky Zadonsky Voronezhsky Voronezhsky Semiluksky Voronezhsky + Semiluksky

Well 209 8 4 4 210 206 9 9 I04 32 20 1 9 2 1 121 18 108 13 5 4 3 38 9 3 6 4 1

TABLE 8-1 Prospect Dneprovskaya Dneprovskaya Vetkhinskaya Vetkhinskaya Krasnoselskaya Krasnoselskaya Barsukovskaya Barsukovskaya South Rechitskaya Malodushinskaya Demekhovskaya East Pervomayskaya Pervomayskaya South Tishkovskaya South Ostashkovichskaya South Ostashkovichskaya Zolotukhinskaya Pritokskaya Rudninskaya