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POROSITY MEASUREMENT

By: Zana Tahir

Karmand Muhammad

Supervised by: Mr.

Barham

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Outline of presentation

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1.What is porosity?

2.What is porosity measurement?

3.Classification of porosity.

4.Methods of measuring porosity.

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porosity

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Porosity is defined as a measure of the capacity of reservoir rocks to contain or store fluids. The fluids stored in the pore spaces within the reservoir rocks could be gas, oil, and water.

Figure. model pore material of porosity

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Porosity Indicates

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1 -High porosity values indicate high capacities of the reservoir rocks to contain these fluids

2 -Low porosity values indicate low capacities of the reservoir rocks to contain these fluids

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Porosity Measurement

Porosity measurement is a method we can use it to measure the pore spaces between the grains of the rocks , by this way we can indicate the

type of the porosity...

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Porosity Measurement

5Sandstone Crystalline Rock (Granite)

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Classification of Porosity

porosity

Pore connectio

n

Absolute

effective

Origin primary

Secondary

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Classification of Porosity

Pore Connection:-

1. Absolute porosity: is the ratio between the total pore volume (interconnected pores and isolated ones) and the bulk volume:

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Classification of Porosity

2. Effective Porosity: is the ratio between the interconnected pore volume and the bulk volume:

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Classification of Porosity

According to their origin-:

1.primary(original):-Developed during the deposition of the rock material.

Rocks with the original porosity are more uniform in their characteristics.

2 .Secondary (induced) :-Developed by some geologic processes subsequent to deposition of the rock.

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Methods of measuring porosity

seismic

logging laboratory

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Methods of measuring porosity

1. Laboratory:- Numerous methods can be used in the laboratory to determine porosity and density.

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Methods of measuring porosity

2- logging :-Several logging techniques are available to measure density or porosity

, by using porosity tools:

A-Density Porosity. B-Neutron Porosity. C-Sonic Porosity.

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Methods of measuring porosity

3. seismic :-seismic method is based on the generation of electromagnetic fields in soils and rocks by seismic waves.

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R. Hook, Jeffery.(2003)”An Introduction to Porosity” ,Society of Petro physicists & Well Log Analysts[Online], May. Available:

https://www.onepetro.org/journal-paper/SPWLA-2003-v44n3a4[Accessed 02 May 2015]

Ezekwe, Nnaemeka.(2010)”Petroleum Reservoir Engineering Practice ”InfromIT[online], Sep 14. Available:

http://www.informit.com/store/petroleum-reservoir-engineering-practice-9780137152834?w_ptgrevartcl=Petroleum+Reservoir+Engineering+Practice%3a+Porosity+of+Reservoir+Rocks_1626870

[Accessed 02 May 2015]

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Reference

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