Page 277 - Applied Petroleum Geomechanics

268 Applied Petroleum Geomechanics

Figure 7.26 The measured pore pressure (p p ), minimum horizontal stress (S h ),
maximum horizontal stress (S H ), and vertical stress (S V ) in the western Sichuan basin,
China. The deep data (Z > 3000 m) were obtained from the Xujiahe sandstone res-
ervoirs, and the shallow data (Z < 2000 m) were obtained from the WFSD-1 (Fig. 6.10)
in the Longmenshan fault belt.

greater than the vertical stress (Fig. 7.26). In the deeper formation
(>900 m), the measured horizontal stresses and depth have the following
approximate relations:
s h ¼ 0:0224Z (7.14)
s H ¼ 0:0335Z (7.15)

where s h and s H are the minimum and maximum horizontal stresses in
MPa; Z is the depth in meters.
7.5.7 Abnormal pressures in the Malay Basin

The Malay Basin is a Tertiary transtensional rift basin located offshore east
of Peninsular Malaysia, between the Gulf of Thailand and Borneo in SE
Asia. Northern part of the Malay Basin is elongated NW to SE and has been
a prolific area for hydrocarbon exploration in Malaysia. In the deep