Oil and Gas | Practice Test / Quiz / MCQs

Home > Petroleum Engineering > Quizzes > Oil and Gas

Oil and Gas

Fast practice, instant feedback. Timer auto-submits when time’s up.

Avg score: 90% • Most missed: “How Can Petroleum Be Lost?”

Study First Challenge a Friend

Oil and Gas

Time left 00:00

25 Questions

1. Why Do Older Rocks In the UK Not Contain Oil and Gas?

As the source rock is buried, pressure and temperature increase. Over time the organic matter breaks down to form a mixture of organic compounds of C, H, O, N and S called Kerogen and finally Petroleum.Most oil and gas reserves in the UK are located offshore, particularly in the North Sea, but gas fields also occur in the Irish Sea. There are a few onshore facilities, the largest of which is Wytch Farm in Dorset. Nearly all the British reserves are in Mesozoic (Triassic, Jurassic, Cretaceous) and Cenozoic (Tertiary, Quaternary) age sedimentary basins.Metamorphism in parts has raised temperatures denaturing the oil. - Intrusions of igneous rocks denatures the oil. - Older rocks are generally buried deeper raising the temperature and denaturing the oil.can be land-based or airborne. An instrument called a gravimeter measures small variations in the Earth's gravitational field strength in milligals (mGal). Survey point safe tied to each location via GPS. Maps are plotted with lines joining points of equal gravitational field strength and anomalies can then be identified.

2. British Oil and Gas Reserves

can be land-based or airborne. An instrument called a gravimeter measures small variations in the Earth's gravitational field strength in milligals (mGal). Survey point safe tied to each location via GPS. Maps are plotted with lines joining points of equal gravitational field strength and anomalies can then be identified.Most oil and gas reserves in the UK are located offshore, particularly in the North Sea, but gas fields also occur in the Irish Sea. There are a few onshore facilities, the largest of which is Wytch Farm in Dorset. Nearly all the British reserves are in Mesozoic (Triassic, Jurassic, Cretaceous) and Cenozoic (Tertiary, Quaternary) age sedimentary basins.As the source rock is buried, pressure and temperature increase. Over time the organic matter breaks down to form a mixture of organic compounds of C, H, O, N and S called Kerogen and finally Petroleum.Metamorphism in parts has raised temperatures denaturing the oil. - Intrusions of igneous rocks denatures the oil. - Older rocks are generally buried deeper raising the temperature and denaturing the oil.

3. Gravity Surveys

Metamorphism in parts has raised temperatures denaturing the oil. - Intrusions of igneous rocks denatures the oil. - Older rocks are generally buried deeper raising the temperature and denaturing the oil.As the source rock is buried, pressure and temperature increase. Over time the organic matter breaks down to form a mixture of organic compounds of C, H, O, N and S called Kerogen and finally Petroleum.can be land-based or airborne. An instrument called a gravimeter measures small variations in the Earth's gravitational field strength in milligals (mGal). Survey point safe tied to each location via GPS. Maps are plotted with lines joining points of equal gravitational field strength and anomalies can then be identified.Most oil and gas reserves in the UK are located offshore, particularly in the North Sea, but gas fields also occur in the Irish Sea. There are a few onshore facilities, the largest of which is Wytch Farm in Dorset. Nearly all the British reserves are in Mesozoic (Triassic, Jurassic, Cretaceous) and Cenozoic (Tertiary, Quaternary) age sedimentary basins.

4. Maturation of Petroleum

As the source rock is buried, pressure and temperature increase. Over time the organic matter breaks down to form a mixture of organic compounds of C, H, O, N and S called Kerogen and finally Petroleum.Metamorphism in parts has raised temperatures denaturing the oil. - Intrusions of igneous rocks denatures the oil. - Older rocks are generally buried deeper raising the temperature and denaturing the oil.can be land-based or airborne. An instrument called a gravimeter measures small variations in the Earth's gravitational field strength in milligals (mGal). Survey point safe tied to each location via GPS. Maps are plotted with lines joining points of equal gravitational field strength and anomalies can then be identified.Most oil and gas reserves in the UK are located offshore, particularly in the North Sea, but gas fields also occur in the Irish Sea. There are a few onshore facilities, the largest of which is Wytch Farm in Dorset. Nearly all the British reserves are in Mesozoic (Triassic, Jurassic, Cretaceous) and Cenozoic (Tertiary, Quaternary) age sedimentary basins.

5. Issues Associated With Extraction of Oil

The extraction of petroleum leads to a reduction in pore fluid pressure. If the lithostatic pressure exceeds the pore fluid pressure then pore spaces will close as grains move closer together. This can create minor earthquakes and subsidence. However if pore fluid pressure exceeds lithostatic pressure fractures can be generated releasing the pore fluid pressure and leading to compaction and subsidence.Most oil and gas reserves in the UK are located offshore, particularly in the North Sea, but gas fields also occur in the Irish Sea. There are a few onshore facilities, the largest of which is Wytch Farm in Dorset. Nearly all the British reserves are in Mesozoic (Triassic, Jurassic, Cretaceous) and Cenozoic (Tertiary, Quaternary) age sedimentary basins.Metamorphism in parts has raised temperatures denaturing the oil. - Intrusions of igneous rocks denatures the oil. - Older rocks are generally buried deeper raising the temperature and denaturing the oil.can be land-based or airborne. An instrument called a gravimeter measures small variations in the Earth's gravitational field strength in milligals (mGal). Survey point safe tied to each location via GPS. Maps are plotted with lines joining points of equal gravitational field strength and anomalies can then be identified.

6. If Source Rocks Are Impermeable How Does The Oil Escape?

Metamorphism in parts has raised temperatures denaturing the oil. - Intrusions of igneous rocks denatures the oil. - Older rocks are generally buried deeper raising the temperature and denaturing the oil.As maturation takes place Kerogen turns into Petroleum. Kerogen is a waxy solid composed of many different hydrocarbon compounds, where as petroleum is a viscous liquid. The transformation of a solid into a liquid corresponds with an increase in volume. This increase in volume induces an increase in pore fluid pressure which causes the rock to crack.Most oil and gas reserves in the UK are located offshore, particularly in the North Sea, but gas fields also occur in the Irish Sea. There are a few onshore facilities, the largest of which is Wytch Farm in Dorset. Nearly all the British reserves are in Mesozoic (Triassic, Jurassic, Cretaceous) and Cenozoic (Tertiary, Quaternary) age sedimentary basins.can be land-based or airborne. An instrument called a gravimeter measures small variations in the Earth's gravitational field strength in milligals (mGal). Survey point safe tied to each location via GPS. Maps are plotted with lines joining points of equal gravitational field strength and anomalies can then be identified.

7. How Can Petroleum Be Lost?

Metamorphism in parts has raised temperatures denaturing the oil. - Intrusions of igneous rocks denatures the oil. - Older rocks are generally buried deeper raising the temperature and denaturing the oil.Erosion or removal of the overlying cap rock. -Escaping upwards along an unsealed fault plane.Most oil and gas reserves in the UK are located offshore, particularly in the North Sea, but gas fields also occur in the Irish Sea. There are a few onshore facilities, the largest of which is Wytch Farm in Dorset. Nearly all the British reserves are in Mesozoic (Triassic, Jurassic, Cretaceous) and Cenozoic (Tertiary, Quaternary) age sedimentary basins.can be land-based or airborne. An instrument called a gravimeter measures small variations in the Earth's gravitational field strength in milligals (mGal). Survey point safe tied to each location via GPS. Maps are plotted with lines joining points of equal gravitational field strength and anomalies can then be identified.

8. Salt Caverns

Most oil and gas reserves in the UK are located offshore, particularly in the North Sea, but gas fields also occur in the Irish Sea. There are a few onshore facilities, the largest of which is Wytch Farm in Dorset. Nearly all the British reserves are in Mesozoic (Triassic, Jurassic, Cretaceous) and Cenozoic (Tertiary, Quaternary) age sedimentary basins.can be land-based or airborne. An instrument called a gravimeter measures small variations in the Earth's gravitational field strength in milligals (mGal). Survey point safe tied to each location via GPS. Maps are plotted with lines joining points of equal gravitational field strength and anomalies can then be identified.Metamorphism in parts has raised temperatures denaturing the oil. - Intrusions of igneous rocks denatures the oil. - Older rocks are generally buried deeper raising the temperature and denaturing the oil.Evaporites are impermeable and therefore ideal for underground storage. They are constructed by injecting water to dissolve the salt and then pumping it out as brine, which can be used in the chemical industry. They are ideal as natural gas can be replenished and removed rapidly as they are hollow and do not contain grains to restrict flow.

9. Southern North Sea Basin

This is because the source rock for this area is the carboniferous coal measures. - Coal forms from the breakdown of vegetation so the source rock did not at any time contain plankton needed for oil. - Escaped gas is mainly held in desert sandstone reservoirs. - The cap rocks are often clays and evaporites and the traps are mainly salt domes and their associated anticlines.can be land-based or airborne. An instrument called a gravimeter measures small variations in the Earth's gravitational field strength in milligals (mGal). Survey point safe tied to each location via GPS. Maps are plotted with lines joining points of equal gravitational field strength and anomalies can then be identified.Most oil and gas reserves in the UK are located offshore, particularly in the North Sea, but gas fields also occur in the Irish Sea. There are a few onshore facilities, the largest of which is Wytch Farm in Dorset. Nearly all the British reserves are in Mesozoic (Triassic, Jurassic, Cretaceous) and Cenozoic (Tertiary, Quaternary) age sedimentary basins.Metamorphism in parts has raised temperatures denaturing the oil. - Intrusions of igneous rocks denatures the oil. - Older rocks are generally buried deeper raising the temperature and denaturing the oil.

10. Factors Affecting Recovery

can be land-based or airborne. An instrument called a gravimeter measures small variations in the Earth's gravitational field strength in milligals (mGal). Survey point safe tied to each location via GPS. Maps are plotted with lines joining points of equal gravitational field strength and anomalies can then be identified.Viscosity of oil - Higher viscosity oils don't flow as easily. -% of matrix or cement - A Higher % will reduce pore space/storage capacity and increase grains per unit volume therefore increasing surface tension. -Grain shape - Rounded grains have a higher porosity -Sorting - Poorly sorted rocks contain less oil as smaller grains infill pore spaces. -Grain size - Smaller grains have a larger surface area producing more friction and reducing permeability. -Joints - Joints increase porosity and permeability allowing oil to be stored and transmitted.Most oil and gas reserves in the UK are located offshore, particularly in the North Sea, but gas fields also occur in the Irish Sea. There are a few onshore facilities, the largest of which is Wytch Farm in Dorset. Nearly all the British reserves are in Mesozoic (Triassic, Jurassic, Cretaceous) and Cenozoic (Tertiary, Quaternary) age sedimentary basins.Metamorphism in parts has raised temperatures denaturing the oil. - Intrusions of igneous rocks denatures the oil. - Older rocks are generally buried deeper raising the temperature and denaturing the oil.

11. Reservoir Rock

it must have a high porosity to be able to store significant amounts of petroleum, it must also have a high permeability to allow oil to migrate into it and be extracted. The properties of a it are the same as the properties of an aquifer. Suitable reservoir rocks include poorly cemented sandstones, limestones and fractured chalk.Metamorphism in parts has raised temperatures denaturing the oil. - Intrusions of igneous rocks denatures the oil. - Older rocks are generally buried deeper raising the temperature and denaturing the oil.can be land-based or airborne. An instrument called a gravimeter measures small variations in the Earth's gravitational field strength in milligals (mGal). Survey point safe tied to each location via GPS. Maps are plotted with lines joining points of equal gravitational field strength and anomalies can then be identified.Most oil and gas reserves in the UK are located offshore, particularly in the North Sea, but gas fields also occur in the Irish Sea. There are a few onshore facilities, the largest of which is Wytch Farm in Dorset. Nearly all the British reserves are in Mesozoic (Triassic, Jurassic, Cretaceous) and Cenozoic (Tertiary, Quaternary) age sedimentary basins.

12. Unconventional Sources of Petroleum

Most oil and gas reserves in the UK are located offshore, particularly in the North Sea, but gas fields also occur in the Irish Sea. There are a few onshore facilities, the largest of which is Wytch Farm in Dorset. Nearly all the British reserves are in Mesozoic (Triassic, Jurassic, Cretaceous) and Cenozoic (Tertiary, Quaternary) age sedimentary basins.They include oil shales, tar sands and coal-bed methane. Historically the exploration of these sources was unpopular due to higher production costs and greater environmental impacts. But as global reserves of oil have dwindled, more attention is being focused on them.can be land-based or airborne. An instrument called a gravimeter measures small variations in the Earth's gravitational field strength in milligals (mGal). Survey point safe tied to each location via GPS. Maps are plotted with lines joining points of equal gravitational field strength and anomalies can then be identified.Metamorphism in parts has raised temperatures denaturing the oil. - Intrusions of igneous rocks denatures the oil. - Older rocks are generally buried deeper raising the temperature and denaturing the oil.

13. Requirements For The Formation of Oil and Gas

Metamorphism in parts has raised temperatures denaturing the oil. - Intrusions of igneous rocks denatures the oil. - Older rocks are generally buried deeper raising the temperature and denaturing the oil.Most oil and gas reserves in the UK are located offshore, particularly in the North Sea, but gas fields also occur in the Irish Sea. There are a few onshore facilities, the largest of which is Wytch Farm in Dorset. Nearly all the British reserves are in Mesozoic (Triassic, Jurassic, Cretaceous) and Cenozoic (Tertiary, Quaternary) age sedimentary basins.can be land-based or airborne. An instrument called a gravimeter measures small variations in the Earth's gravitational field strength in milligals (mGal). Survey point safe tied to each location via GPS. Maps are plotted with lines joining points of equal gravitational field strength and anomalies can then be identified.originate in sedimentary basins. The main requirements to form economic accumulations are: -A source rock -Maturation -Migration -A reservoir rock -A cap rock -A trap

14. Oil Shale

Most oil and gas reserves in the UK are located offshore, particularly in the North Sea, but gas fields also occur in the Irish Sea. There are a few onshore facilities, the largest of which is Wytch Farm in Dorset. Nearly all the British reserves are in Mesozoic (Triassic, Jurassic, Cretaceous) and Cenozoic (Tertiary, Quaternary) age sedimentary basins.Metamorphism in parts has raised temperatures denaturing the oil. - Intrusions of igneous rocks denatures the oil. - Older rocks are generally buried deeper raising the temperature and denaturing the oil.a general term for any fine grained sedimentary rock containing significant amounts of kerogen, that did not undergo enough maturation to produce petroleum. They can be processed by steam injection to produce oil that can be pumped out. Alternatively they can be mined and the kerogen converted into synthetic crude oil or burnt as a low grade fuel.can be land-based or airborne. An instrument called a gravimeter measures small variations in the Earth's gravitational field strength in milligals (mGal). Survey point safe tied to each location via GPS. Maps are plotted with lines joining points of equal gravitational field strength and anomalies can then be identified.

15. How Can Petroleum Be Destroyed?

if the temperature exceeds 200Â°C due to: -Heat from an igneous intrusion or volcanic activity. -Regional metamorphism. -Burial where the geothermal gradient results in high temperatures.Most oil and gas reserves in the UK are located offshore, particularly in the North Sea, but gas fields also occur in the Irish Sea. There are a few onshore facilities, the largest of which is Wytch Farm in Dorset. Nearly all the British reserves are in Mesozoic (Triassic, Jurassic, Cretaceous) and Cenozoic (Tertiary, Quaternary) age sedimentary basins.can be land-based or airborne. An instrument called a gravimeter measures small variations in the Earth's gravitational field strength in milligals (mGal). Survey point safe tied to each location via GPS. Maps are plotted with lines joining points of equal gravitational field strength and anomalies can then be identified.Metamorphism in parts has raised temperatures denaturing the oil. - Intrusions of igneous rocks denatures the oil. - Older rocks are generally buried deeper raising the temperature and denaturing the oil.

16. Gas Cap Drive

Metamorphism in parts has raised temperatures denaturing the oil. - Intrusions of igneous rocks denatures the oil. - Older rocks are generally buried deeper raising the temperature and denaturing the oil.can be land-based or airborne. An instrument called a gravimeter measures small variations in the Earth's gravitational field strength in milligals (mGal). Survey point safe tied to each location via GPS. Maps are plotted with lines joining points of equal gravitational field strength and anomalies can then be identified.Most oil and gas reserves in the UK are located offshore, particularly in the North Sea, but gas fields also occur in the Irish Sea. There are a few onshore facilities, the largest of which is Wytch Farm in Dorset. Nearly all the British reserves are in Mesozoic (Triassic, Jurassic, Cretaceous) and Cenozoic (Tertiary, Quaternary) age sedimentary basins.Natural gas (carbon dioxide or nitrogen) are injected into the reservoir rock above the oil to maintain the pressure.

17. Spills of Light Fractions

Most oil and gas reserves in the UK are located offshore, particularly in the North Sea, but gas fields also occur in the Irish Sea. There are a few onshore facilities, the largest of which is Wytch Farm in Dorset. Nearly all the British reserves are in Mesozoic (Triassic, Jurassic, Cretaceous) and Cenozoic (Tertiary, Quaternary) age sedimentary basins.can be land-based or airborne. An instrument called a gravimeter measures small variations in the Earth's gravitational field strength in milligals (mGal). Survey point safe tied to each location via GPS. Maps are plotted with lines joining points of equal gravitational field strength and anomalies can then be identified.Metamorphism in parts has raised temperatures denaturing the oil. - Intrusions of igneous rocks denatures the oil. - Older rocks are generally buried deeper raising the temperature and denaturing the oil.Covers seabirds leading to a loss of buoyancy and drowning. -Enters the plumage of birds and impacts upon their thermoregulation. -Blocks out sunlight leading to a reduction in photosynthetic algae (Phytoplankton), which in turn has knock-on effects for the ecosystem.

18. Spills of Heavy Fractions

Metamorphism in parts has raised temperatures denaturing the oil. - Intrusions of igneous rocks denatures the oil. - Older rocks are generally buried deeper raising the temperature and denaturing the oil.Toxic heavy fractions sink to the seabed, where they persist for a long time and smother organisms. -The oil reacts with dissolved oxygen in the water and thus reduces the available oxygen for marine life.Most oil and gas reserves in the UK are located offshore, particularly in the North Sea, but gas fields also occur in the Irish Sea. There are a few onshore facilities, the largest of which is Wytch Farm in Dorset. Nearly all the British reserves are in Mesozoic (Triassic, Jurassic, Cretaceous) and Cenozoic (Tertiary, Quaternary) age sedimentary basins.can be land-based or airborne. An instrument called a gravimeter measures small variations in the Earth's gravitational field strength in milligals (mGal). Survey point safe tied to each location via GPS. Maps are plotted with lines joining points of equal gravitational field strength and anomalies can then be identified.

19. Depleted Oil and Gas Reservoirs

Most oil and gas reserves in the UK are located offshore, particularly in the North Sea, but gas fields also occur in the Irish Sea. There are a few onshore facilities, the largest of which is Wytch Farm in Dorset. Nearly all the British reserves are in Mesozoic (Triassic, Jurassic, Cretaceous) and Cenozoic (Tertiary, Quaternary) age sedimentary basins.can be land-based or airborne. An instrument called a gravimeter measures small variations in the Earth's gravitational field strength in milligals (mGal). Survey point safe tied to each location via GPS. Maps are plotted with lines joining points of equal gravitational field strength and anomalies can then be identified.These are reservoirs from which all the recoverable oil and gas has been extracted, leaving underground rocks capable of storing gas. They are ideal as the geology is already well known and it is cost effective as the site is already drilled with equipment left over from extraction.Metamorphism in parts has raised temperatures denaturing the oil. - Intrusions of igneous rocks denatures the oil. - Older rocks are generally buried deeper raising the temperature and denaturing the oil.

20. Secondary Recovery

Metamorphism in parts has raised temperatures denaturing the oil. - Intrusions of igneous rocks denatures the oil. - Older rocks are generally buried deeper raising the temperature and denaturing the oil.Thermal methods - Steam is injected to increase the oils temperature and lower the viscosity of the oil -Detergents - Used to reduce surface tension of the oil to loosen it from the grains -Bacteriological - Digest and break down large hydrocarbon molecules to decrease viscosity. | After this 20-30% of the oil still remains in the reservoir.can be land-based or airborne. An instrument called a gravimeter measures small variations in the Earth's gravitational field strength in milligals (mGal). Survey point safe tied to each location via GPS. Maps are plotted with lines joining points of equal gravitational field strength and anomalies can then be identified.Most oil and gas reserves in the UK are located offshore, particularly in the North Sea, but gas fields also occur in the Irish Sea. There are a few onshore facilities, the largest of which is Wytch Farm in Dorset. Nearly all the British reserves are in Mesozoic (Triassic, Jurassic, Cretaceous) and Cenozoic (Tertiary, Quaternary) age sedimentary basins.

21. Causes of Gravity Anomalies

A positive- caused by an excess of mass or materials that are denser than their surroundings. Positive anomalies are usually associated with anticlinal traps. -A negative- caused by a deficit of mass or materials that are less dense than their surroundings. Negative anomalies are usually associated with salt dome traps.Most oil and gas reserves in the UK are located offshore, particularly in the North Sea, but gas fields also occur in the Irish Sea. There are a few onshore facilities, the largest of which is Wytch Farm in Dorset. Nearly all the British reserves are in Mesozoic (Triassic, Jurassic, Cretaceous) and Cenozoic (Tertiary, Quaternary) age sedimentary basins.can be land-based or airborne. An instrument called a gravimeter measures small variations in the Earth's gravitational field strength in milligals (mGal). Survey point safe tied to each location via GPS. Maps are plotted with lines joining points of equal gravitational field strength and anomalies can then be identified.Metamorphism in parts has raised temperatures denaturing the oil. - Intrusions of igneous rocks denatures the oil. - Older rocks are generally buried deeper raising the temperature and denaturing the oil.

22. Down-Hole Logging

Most oil and gas reserves in the UK are located offshore, particularly in the North Sea, but gas fields also occur in the Irish Sea. There are a few onshore facilities, the largest of which is Wytch Farm in Dorset. Nearly all the British reserves are in Mesozoic (Triassic, Jurassic, Cretaceous) and Cenozoic (Tertiary, Quaternary) age sedimentary basins.It is possible to mount geophysical instruments on a wire or 'Sonde' (probe) that is passed down the drill hole to record data as it is slowly pulled back up from the bottom.Metamorphism in parts has raised temperatures denaturing the oil. - Intrusions of igneous rocks denatures the oil. - Older rocks are generally buried deeper raising the temperature and denaturing the oil.can be land-based or airborne. An instrument called a gravimeter measures small variations in the Earth's gravitational field strength in milligals (mGal). Survey point safe tied to each location via GPS. Maps are plotted with lines joining points of equal gravitational field strength and anomalies can then be identified.

23. Oil and Natural Gas Reserves Increase If...

Most oil and gas reserves in the UK are located offshore, particularly in the North Sea, but gas fields also occur in the Irish Sea. There are a few onshore facilities, the largest of which is Wytch Farm in Dorset. Nearly all the British reserves are in Mesozoic (Triassic, Jurassic, Cretaceous) and Cenozoic (Tertiary, Quaternary) age sedimentary basins.Exploration discovers more. -Technology improves so more can be extracted from existing wells -Smaller oil fileds become economic when prices rise.can be land-based or airborne. An instrument called a gravimeter measures small variations in the Earth's gravitational field strength in milligals (mGal). Survey point safe tied to each location via GPS. Maps are plotted with lines joining points of equal gravitational field strength and anomalies can then be identified.Metamorphism in parts has raised temperatures denaturing the oil. - Intrusions of igneous rocks denatures the oil. - Older rocks are generally buried deeper raising the temperature and denaturing the oil.

24. Primary Recovery

Most oil and gas reserves in the UK are located offshore, particularly in the North Sea, but gas fields also occur in the Irish Sea. There are a few onshore facilities, the largest of which is Wytch Farm in Dorset. Nearly all the British reserves are in Mesozoic (Triassic, Jurassic, Cretaceous) and Cenozoic (Tertiary, Quaternary) age sedimentary basins.To extract reserves the reservoir rock is drilled and a production well established. Initially oil comes to the surface under natural pressure caused by hydrostatic pressure of he water in pore spaces beneath the oil, gasses in the oil coming out of solution and the expansion of gas above the oil. After the natural pressure is released oil is pumped to the surface using nodding donkeys. Typically only 20-30% of the oil in a reservoir can be recovered by it.can be land-based or airborne. An instrument called a gravimeter measures small variations in the Earth's gravitational field strength in milligals (mGal). Survey point safe tied to each location via GPS. Maps are plotted with lines joining points of equal gravitational field strength and anomalies can then be identified.Metamorphism in parts has raised temperatures denaturing the oil. - Intrusions of igneous rocks denatures the oil. - Older rocks are generally buried deeper raising the temperature and denaturing the oil.

25. Seismic Reflection Surveys

can be land-based or airborne. An instrument called a gravimeter measures small variations in the Earth's gravitational field strength in milligals (mGal). Survey point safe tied to each location via GPS. Maps are plotted with lines joining points of equal gravitational field strength and anomalies can then be identified.Metamorphism in parts has raised temperatures denaturing the oil. - Intrusions of igneous rocks denatures the oil. - Older rocks are generally buried deeper raising the temperature and denaturing the oil.can be land-based or ship-based. Artificial seismic waves are generated by dropping a heavy thumper mounted on a vibrotruck on land or by air guns at sea. The seismic waves travel into the Earth and are reflected at layer boundaries within the strata. The reflected waves travel back to the surface where they are recorded by an array of receivers called geophones on land or hydrophones at sea. Their locations accurately pinpointed using Global Positioning Systems (GPS).Most oil and gas reserves in the UK are located offshore, particularly in the North Sea, but gas fields also occur in the Irish Sea. There are a few onshore facilities, the largest of which is Wytch Farm in Dorset. Nearly all the British reserves are in Mesozoic (Triassic, Jurassic, Cretaceous) and Cenozoic (Tertiary, Quaternary) age sedimentary basins.

⚡ Recently practiced quizzes in this topic

Live quiz activity

Introduction To Petroleum Engineering Petroleum Engineering Interview Test

25 Questions

❤ If you liked Fatskills, consider supporting us by checking out The Life Manuals You Never Got.

About | Explore | User Guide | Topics | Subjects | Doubt Solver | Career Aptitude Test | Answers | Free Tools | OSHA Basics Quiz | What Should We Know?
Privacy | Terms |

Without work one finishes nothing. - Ralph Waldo Emerson
© 2026 Fatskills.com

All trademarks, logos and brand names are the property of their respective owners. All company, product and service names used in this website are for identification purposes only. Use of these names, trademarks and brands does not imply endorsement.

25 Questions

❤ If you liked Fatskills, consider supporting us by checking out The Life Manuals You Never Got.

About | Explore | User Guide | Topics | Subjects | Doubt Solver | Career Aptitude Test | Answers | Free Tools | OSHA Basics Quiz | What Should We Know? Privacy | Terms |

Without work one finishes nothing. - Ralph Waldo Emerson© 2026 Fatskills.com

All trademarks, logos and brand names are the property of their respective owners. All company, product and service names used in this website are for identification purposes only. Use of these names, trademarks and brands does not imply endorsement.

About | Explore | User Guide | Topics | Subjects | Doubt Solver | Career Aptitude Test | Answers | Free Tools | OSHA Basics Quiz | What Should We Know?
Privacy | Terms |

Without work one finishes nothing. - Ralph Waldo Emerson
© 2026 Fatskills.com