Narayan Gadagkar

Oil in Gulf : the saga unfolds

A passive continental margin of Gondwana

Five hundred million history of sedimentation

Confined to equatorial latitude horizon        

Where warm climate overdrove organic elan.

 

The wide long shelf of Neo Tethys

Two hundred million year past Jurassic days

Rising seas embraced oil prone kerogens

The algae and planktons shot to   abundance.

 

The source rocks and reservoirs were nearby

 Shortened the oil migration pathway thereby

The ten-kilometre-thick sediment package

Made it a favourable terrain for oil storage.

 

The presence of effective regional seals

Both the evaporites and marine shales

Arabian plate moved slow through time

Endured gradual compression sublime.

 

The rigid Precambrian basement held its ground

Younger sediments only were deformed

With tectonic regime limited and thin skinned

Zagros compressed, folded and thrusted

And large whaleback anticlines were formed.

 

Salt diapirs too pierced the rising dome

Creating traps where migrating oils found home

Such is the saga of Gulf’s oil, written deep in stone

The desert sands and water starved Gulf region

Boasts its black gold, flexes muscle often

Fuel-starved rest of world blinks wimpy eyed.