2nd lecture of petroleum geology
porosity is of 2 types:-
bulk: The porosity calculated considering the total pore spaces.
effective: the porosity calculated considering the pores that can hold hydrocarbon.
bulk: The porosity calculated considering the total pore spaces.
effective: the porosity calculated considering the pores that can hold hydrocarbon.
The component that will occupy the pore depends upon the pore size
Sedimentary texture:-structure formed due to sedimentation. It is of two types:-
1)that forms on surface:- Depends on flow and deposional enviornment(also known as bed forms)[example:ripple marks]
1)that forms on surface:- Depends on flow and deposional enviornment(also known as bed forms)[example:ripple marks]
2)that forms in beds:-current bedding. enourmous importance in studying the depositional history.
Sedimentary structures are used to know the paleocurrent flow.
most indian oils are generated from type-3 kerogens. type-3 kerogens are derived from terrestial organic matter.
During the last glacial period the sea level decreases about 138 metres. lot of shelf was exposed, the base level of erosion went down
so no deposition in vast area Because slope of shelf is very less. Such an kind of unconformity formed is known
as 1st order unconformity.
so no deposition in vast area Because slope of shelf is very less. Such an kind of unconformity formed is known
as 1st order unconformity.
Primary migration:- low permiability rock, Fine grain rock.
secondary migration:- high permeability rock, coarse grain rock.
Thats all for todays class.
For any suggestions and corrections, please post comments
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