Rt€@lll

- 218
ln Malayeia and Brunei, the Northwest Borneo basin and its offshore extension are of
recent interest as are the Saigon-Brunei basin in the southern part of Lhe South China Sea
and the Gulf of Thailand basin.
The Gulf of Thaitand basin exiends to the North into the land area of Bangkok. Of
special interest also is the sedimentary area in the Andaman Sea between the Andaman and
Nicobar Islands extending down to the Malacca Straits'
In Lhe philippines producing fields have been found in the offshore area of Palawan
Island in the South China Sea (Siddayao, 1980).
Some recent discoveries in South-East Asia, particularly in the offshore areas, have
greatly changed earlier concepts of estimating hydrocarbon potential bmed on the projection
of land geology.
Figure I shows the seabed areas in South-East Asia wilh their topographic Aradients
and Figu-re 2 shows the prospective hydrocarbon basins and oil and 9as producing areas in
South-East Asia. Table L provides datl m hydrocarbon resources in the $bmarine areas of
the South-East Asian region.
=
Figure I : Seabed areas in South-East Asia *rowing topographic gradionts
(from Siddayao, 1978)
oepth to 2oo mctre isoboth
Cortinentql plotfurm
deopr thon 200 m€ter's
Continentol rise (gentle sloPe
swoy frgm Gontincnt)