Petroleum System Analysis Quiz

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What is the primary purpose of a trap in a petroleum system?

To identify porous zones

To accumulate oil and gas (correct)

To measure reservoir resistivities

To facilitate the migration of oil and gas

In a clastic reservoir, what is the primary reconnaissance measurement used to identify reservoirs?

Resistivity log (correct)

Gravity data

Porosity log

Seismic data

What is the primary purpose of a seal in a petroleum system?

To allow the migration of oil and gas

To measure reservoir resistivities

To identify porous zones

To trap hydrocarbons and stop their migration (correct)

What types of rocks can be efficient seals in a petroleum system?

Anhydrite, salt, shale, and tight carbonate Signup and view all the answers

What is the primary reconnaissance measurement used to identify reservoirs in a carbonate system?

Porosity log Signup and view all the answers

What is the primary function of a seal in a petroleum system?

To prevent the movement of oil and gas over time Signup and view all the answers

What is commonly derived from other logs or measured from cores in a petroleum system?

Effective porosity and permeability logs Signup and view all the answers

What is the term for the avenue through which oil and gas move from the source into the reservoir rock to the trap?

Migration route Signup and view all the answers

What is the primary characteristic of a reservoir rock?

High porosity and high permeability Signup and view all the answers

What is the term for a rock that contains sufficient hydrocarbon-prone organic matter to generate oil and gas?

Source rock Signup and view all the answers

What is the study of how petroleum system elements and processes interact to create hydrocarbon-bearing provinces known as?

Petroleum System Analysis Signup and view all the answers

What is the term for economically viable concentrations of hydrocarbons?

Oil and Gas Fields Signup and view all the answers

What is the primary reason for the dark color of source rocks?

The presence of organic matter Signup and view all the answers

What is required for the preservation of organic matter in source rocks?

A subaqueous environment with stagnant sea-bed conditions Signup and view all the answers

What percentage of oil and gas is formed by the thermal alteration of kerogen?

80-90% Signup and view all the answers

What is the most important factor in the generation of hydrocarbons from kerogen?

Temperature Signup and view all the answers

What is the threshold temperature for the onset of kerogen maturity?

75-80°C Signup and view all the answers

What is generated first during the thermal alteration of kerogen?

Heavy oil Signup and view all the answers

What is the primary difference between conventional and unconventional hydrocarbons?

The type of rock formation they are found in Signup and view all the answers

What is the term for the total volume of oil or gas present in a field before production?

Hydrocarbons in place Signup and view all the answers

What is the most important category of reserves from an economic perspective?

Proved reserves Signup and view all the answers

What are the two broad categories of reserve estimation methods?

Volumetric and performance analysis Signup and view all the answers

What is required for the performance analysis method of reserve estimation?

Long-term production data Signup and view all the answers

What are the two techniques used in the volumetric method of reserve estimation?

Deterministic and probabilistic Signup and view all the answers

What is the purpose of repeated random selections of values and their probabilities in petroleum system analysis?

To generate a large number of volumetric estimates Signup and view all the answers

What do the distributions obtained from the repeated random selections get converted into?

Probability distribution and cumulative probability curves Signup and view all the answers

What is the purpose of risk assessment in petroleum system analysis?

To distinguish between prospects based on risk Signup and view all the answers

What are the three types of reserves values that can be estimated from the probability distribution and cumulative probability curves?

Minimum, maximum, and most likely Signup and view all the answers

What is the main source of uncertainty in petroleum system analysis?

Quantities derived during exploration stages Signup and view all the answers

What is the purpose of evaluating multiple leads in petroleum system analysis?

To compare the results from different iterations Signup and view all the answers