In this slide, the favorable environments of Hydrocarbon accumulation, Major occurrences, and detailed lecture has been done on where to look for Hydrocarbons is discussed.

1. Search(Hunt) of HC’s

2. Where to look for HC?
Oil search is like hunting game
 For fishing you won’t go to the mountains
 For hunting deer you wont go to sea
HC has its own habitat
 Normally found in
• sedimentary rocks with pores where HC can stay
 In areas where suitable conditions existed in geologic past (millions of years ago)
• for flourishing and depositing organic material

3. Major Occurrences

4. Where to look for HC?
It has a chance factor
 Like hunting you have probabilities of finding HC
 but no surety
 If HC is found in one area, it is likely that nearby areas will have it too

5. Favorable conditions
DEPOSITIONAL ENVIRONMENT(TYPES OF SOURCE ROCKS)
Rivers
Lacks
Marshlands
Marine Basins

6. Favorable Conditions
A calm, shallow, warm and stable sea, gulf like, in the geologic past
Much of the oil of the world comes from areas which are either presently gulfs OR which were
gulfs in the past
 Examples: Arabian/Persian Gulf,Gulf of Mexico, Niger Gulf, CaspianSea
A supporting environment for the sea and near-shore life in that sea

7. Favorable Conditions
Slow and continuous deposition of sediments
Little tectonic activities
 i.e. uplifting and crumbling of rocks
High temperature & enough overlying pressure
 for maturity and migration

8. Unfavorable Conditions
Rocks deposited in rough, very deep, very cold sea
No HC is yet found in polar regions
Sediments deposited on land
Areas with igneous activities/metamorphic rocks
 With some exceptions
Areas with intense tectonic activities; Himalayas, Alps, Andes, etc.
Areas with very fast sediment deposition

9. Areas Suitable in worldwide

13. Areas suitable in Pakistan

15. Areas suitable in Pakistan
Sindh (Indus Valley)
Potwar
Sulaiman Range
Multan
Kohat
Sukkur
Taunsa

16. Areas Unsuitable in Pakistan
Kashmir
Northern Areas; Gilgit, Swat etc.
Chaghi/Dalbandin
Quetta, Qalat
Sargodha
Tharparkar/Nagarparkar