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Transcript of limestone
Submitted to :
(1) what is a Sedimentary Rock ?
(2) What is a Reservoir ?
(3) Classification , Types and properties of Limestone.
(4) Porosity of Limestone.
(5) Limestone Permeability.
What are Sedimentary Rocks ?
How Reservoir Rock Was Formed ?
Faculty of Engineering
2nd year Petroleum Dept.
A source Rock rich in hydrocarbon material.
A porous and permeable reservoir rock.
A Cap Rock
" Seal "
#There are Variety of geological Traps : 1)structural types : anticline , fold & fault.
2)stratigraphic types : unconformity & lens.
and there are combination of these types
Now all of us can know :
"The Reservoir" ?
A petroleum reservoir is a subsurface pool of hydrocarbons
contained in porous or fractured rock formation.
some micro fossils make up the sea floor ooze
The Summary >>>
Sedimentary Rocks are formed by the deposition of layers of minerals over each other and by diagensis they are changed to sedimentary rocks
and these areThe Types :
(1) Clastic :
(2) Organic :
(3) Chemical :
- Salt rock
-Describe the rock bsed on grain size and type.
-The rock is named according to the material filling the spaces.
-Describe the rock based on depositional texture
- mictric matrix :
microcristaline calcite mud matrix
- sparite cement :
sparry calcite cement
(1) Physical :
(2) Chemical :
" Limestone as a Reservoir Rock "
Porosity of Limestone
is the ratio of pore volume to its total volume P=Vp/Vt
Rate of flow of a liquid through a formation depends on :
- The pressure drop
- viscosity of liquid
what is the permeability ?
The ability of rock to allow fluids to flow through the pore channels
Types of permeability
(1) Absolute :
one Fluid in rock
(2) Effective :
more than one fluid
(3) Relative :
ratio between effective permeability to fluid at a given saturation and effective permeability to that fluid at 100% saturation.
A) Sediment controls on Permeability :
1) Packing density
3) Grain size
Why limestone is Permeable ?
Bedding Planes and Joints Make limestone Permeable
Measuring of Permeability
(1) Clastic (2) Carbonate
Why Porosity is important ?
B) Directional Permeability
Caused by orientation of grain size
It's a Video to show us
this Process :