21 votes

How much oil is created each year?

I can't provide numbers, but a hopefully reasonable outline for your own calculations: All that is required for oil to form is a source-rock brought to the right depths in a sedimentary basin and the ...
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  • 3,876
16 votes

What is the most important source of natural gas? Coal, oil or other?

The most important source of natural gas is natural gas. This is why it is called natural. It is not "made" from oil or coal. Natural gas forms by decomposition of organic material. Whether the ...
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  • 22.2k
14 votes

Why is there so much oil in Saudi Arabia, Venezuela and Canada, but almost none in Europe?

I wouldn't say there's 'almost none' in Europe, but the global distribution of petroleum is uneven. The reason is that petroleum systems need a convergence of conditions that is relatively rare. For ...
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  • 10.8k
13 votes

Is it possible that the recent droughts are signs of epic crust failure?

Is it possible that the recent droughts are signs of epic crust failure? No. Even though your 5 points do not make much sense, I'll try to answer it anyway. There are no continental plates. There ...
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  • 22.2k
12 votes

Estimating the permeability tensor of an oil field by remote sensing

I remember a comment on this by Rodney Calvert in the video lecture version of his SEG Distinguished Instructor Lecture "Insights and Methods for 4D Reservoir Monitoring and Characterization": http://...
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  • 649
10 votes

How much oil is created each year?

According to this University of Wisconsin reference http://whyfiles.org/100oil/2a.html 12.5% of oil and gas is from organisms that lived 5 to 34 million years ago. So if we take an estimate for ...
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  • 5,892
10 votes
Accepted

Incised valleys and hydrocarbon potential

Sandstone bodies in incised valleys can be good hydrocarbon reservoirs. Incised valleys form on the coastal plain and/or continental shelf during a fall in relative sea-level by a combination of ...
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  • 10.8k
10 votes
Accepted

What causes "hydrocarbons" to take the form of petroleum versus natural gas?

Oil and gas both form when organic matter is buried under anoxic conditions, such that it isn't oxidised and subsequently mineralised to the elemental components of the hydrocarbons. What ...
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  • 2,602
10 votes
Accepted

How can the 'abiogenic oil' hypothesis be disproven?

One possible key is isotopic fractionation via biological processes - see dating the development of the C4 photosynthetic pathway, and specifically isotopic fractionation between carbon-13 and carbon-...
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  • 2,826
9 votes

Are there probably decent oil fields located in the middle of the ocean?

Are there probably decent oil fields located in the middle of the ocean? tl;dr: no. Hydrocarbon deposits form by thermal maturation (i.e. slow and mild heating) of buried organic matter (i.e. dead ...
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  • 22.2k
8 votes

What is the age of the earth's oil?

Oil can be generated from pretty much anything organic. The oldest oil that I know of comes from a porous Eocambrian siltstone in the Sultanate of Oman. This was formed nearly 200 million years before ...
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8 votes

Petroleum and coal formation

Coal, oil and gas can be found anywhere on Earth: on land and on sea. The Japanese once mined coal from beneath the sea floor, using Hashima Island as the base of operations. The island is only 6.3 ...
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  • 20.3k
8 votes

Is it feasible to use depleted oil wells for geothermal production?

In most cases, probably not. Oil could be considered a metamorphic mineral, formed by "gentle" heating. That is gently on a geological scale - still enough to burn your hands! Geothermal systems ...
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  • 3,823
8 votes
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How does one create petroleum/crude oil for future generations?

Geological processes are just too slow. Although, given how quickly we are pumping greenhouse gases into the atmosphere, humanity may well (in a generation or two) be growing biological material as ...
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  • 4,060
7 votes

Why is there so much oil in Saudi Arabia, Venezuela and Canada, but almost none in Europe?

The map shown in the question is of proven oil reserves that can be extracted under current conditions. However, it is really showing you the distribution of oil reserves in a political sense, which ...
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  • 12.7k
7 votes
Accepted

Why would there be no hydrocarbons in the Sveconorwegian belt?

There's a little more to it than its substantial age, but not a lot. First, a bit of background. We need a few conditions for accumulations of oil or gas: A kerogen-rich source rock that has been '...
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  • 10.8k
6 votes

What is the age of the earth's oil?

The previous answer is actually correct in stating that fish have very little to do with oil formation. Hydrocarbons of a volume that is able to accumulate a reservoir that is economic to produce ...
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  • 121
6 votes

How does one create petroleum/crude oil for future generations?

This isn't really a complete answer, more of a footnote to @EnergyNumbers answer. (Aside: I'm not sure what the definition of a 'geological process' is, but it's not quite fair to say they are 'too ...
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  • 10.8k
6 votes
Accepted

How much oil was consumed worldwide since it was started to use massively in the mid 19th century?

Cumulative world oil production at the end of 2017 was approximately 1.36 trillion barrels.
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5 votes
Accepted

The youngest and oldest source rock for hydrocarbons in economic quantities

According "The youngest natural oil on earth" Doklady Chemistry vol. 438, pages 144-147: Prior to this paper, it was known that oil of the Guaymas basin is from young sediments and is 5000 years old. ...
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  • 5,892
5 votes

Hydrocarbon potential in Ganges Brahmaputra delta

There have been a few discoveries in the Bay of Bengal. Santos made a gas discovery in 2012, and depending on what you'd call part of the delta complex (all of the Bengal Fan?), there are others. One ...
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  • 10.8k
5 votes

Is it feasible to use depleted oil wells for geothermal production?

Geothermal reservoirs are very different from hydrocarbon reservoirs. A geothermal reservoir is made of highly fractured igneous/metamorphic rocks which have low intrinsic permeability. Fluids get ...
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  • 2,361
5 votes
Accepted

What would happen if magma flows into a very large oil deposit?

If there were an earthquake that somehow cause a crack in the earth and allowed a significant amount of magma to flow into a very large oil deposit. My understanding from this is that you are making ...
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  • 22.2k
5 votes

What would happen if magma flows into a very large oil deposit?

An oil deposit is gravel and rock mixed with oil, capped by rock - like this: My guess is that if somehow, likely from below or sideways, magma would intrude into this deposit, oil (and posibly water)...
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  • 1,184
5 votes

In the oil field, when a vertical cylinder coring sample is taken, how is the core severed at the bottom and removed from the formation?

Coring is an important method to get detailed information about the formations, however, it's very time-consuming and costive, so it's only applied when geologists and reservoir engineers need high-...
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  • 5,896
5 votes
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How to compare the oil production in barrel vs production in tons

I suspect that 3.75 million tons of oil is actually tons of oil equivalent (toe). This is a unit of energy rather than mass. The US uses a barrel of oil equivalent (boe) as a measure of energy. The ...
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5 votes
Accepted

Will kerosene reserves deplete long before oil?

No. At the moment, we use cracking to turn heavy, long-chain hydrocarbons into more valuable short-chain hydrocarbons, such as petrol/gasoline and kerosene; as a general rule, lighter hydrocarbons ...
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5 votes

What is the most important source of natural gas? Coal, oil or other?

A significant part of the natural gas used around the world today comes from oil fields. On top of the oil is a layer of natural gas, and in the crude oil is dissolved natural gas. This will be ...
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  • 1,820
5 votes
Accepted

What are the prerequisites for petroleum geology?

I think the shortest fair answer is there are no special prerequisites beyond a general, high-school-level education in maths and science. It's a difficult question to answer directly, because ...
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  • 10.8k
4 votes
Accepted

Glossary of oil and gas industry geophysical terms

Sheriff's Encyclopedic Dictionary is the closest thing to a canonical text, but the Schlumberger glossary is more up to date. Sheriff is a scientific text, whereas the Schlumberger glossary is a ...
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  • 10.8k

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