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Questions tagged [petroleum]

Questions of[petroleum][5] origin, [history] [1], & methods of production. Examples of [formations] [3]/deposits this is to include [mapping] [4]. Application i:e development of petroleum based products & other usages. Evolution of petroleum technology past, present, & future aligning with [...

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What clays from XRD analysis should be taken into account in Vshale calibration?

I'm working with Well Logs and I want to calibrate my Vshale model with the clays from an XRD analysis that I have from the lab. There are muscovite and biotite, chlorite (secondary), detrital clay ...
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Will kerosene reserves deplete long before oil?

Assuming that the oil reserves would end at a certain date, would it be expected that the kerosene be no longer used as fuel on a previous date due to the quality fall of barrels? If so, would that ...
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How do I Interpreted EDX Result?

I am new for SEM-EDX but I want to learn. In the EDX data result, there are Wt % and at % from every element (for Example if : Wt % C 14.16, O 51.22, Al 2.22, Si 30.64, Fe 1.75 and At% C 21.11, O 57....
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How can I test my house water supply for hydrocarbon presence?

I live in a city where the water supply quality seem pretty good on daily/average basis. However, it is also well known that there is a huge problem with deteriorating water pipes. My problem is that ...
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Caspian Sea oil deposits

Azerbaijan appears to have vast development in its oil sector. Images on google earth show oil platforms connected by road ways far out into the Caspian Sea of the coast of Baku. Why is the majority ...
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Estimating fracture pressure (looking for literature to support)

I am trying to estimate fracture pressure of a reservoir when applying injection. I keep reading fracture pressure=reservoir pressure+2000psi or fracture pressure gradient is 0.7psi/ft, but I can't ...
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Are there probably decent oil fields located in the middle of the ocean?

I did a google image search for a world map of offshore oil. Surprisingly I found virtually nothing. I had to search country by country for such maps. I noticed most if not all were located very near ...
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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?

I would like to know how the core is cut off at the bottom of the drill. I also would like to know how the core is brought up to the surface without slipping out and falling back down.
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Possible reasons for field GOR being below Solution GOR(Rs)

It has been noticed in the field multiple times that the field produced GOR is well below the Solution GOR (obtained from PVT properties). Based on Industry observed production data globally, I would ...
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64 views

How to compare the oil production in barrel vs production in tons

I hope this is the right SE site...I was unsure if to post here or on Physics, but I see there are quite many questions about oil here. So, my question is the following: I would like to compare the ...
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What is a “show” in petroleum geology?

Is a show when naturally ocurring oil seeps out of a fracture on the surface? Or is it when engineers fracture rocks in order to extract oil?
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245 views

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. With that high amount of explosive energy that ...
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Oil production profile of oil fields with water coning [closed]

What is the typical production profile of oil fields with water coning?
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Petroleum and coal formation

I was wondering why are coal and petroleum being both fossil fuels are found at different places i.e. coal at land and petroleum at sea.
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What is the age of the earth's oil?

Oil in the ground is found under the oceans and seas. It is made of dead fish. But from what period are those fish? I heard they are about 119 million years old. But fish exist much longer than that. ...
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What are the natural causes for methane formation?

Natural gas is mostly made of methane ($\ce{CH4}$). Methane can be produced as a result of microbes eating organic matter. But can it also be naturally formed without any assistance from organic ...
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Glossary of oil and gas industry geophysical terms

Reviewing market regulatory standards I came across the problem of finding a source that I could cite of concise, worldwide accepted industry geophysical terms. So far I know Schlumberger Oilfield ...
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Is it possible that the recent droughts are signs of epic crust failure? [closed]

The full question is: Is it possible that the recent, successive, long droughts from Australia to the West Coast of both American continents are signs of epic crust failure? The question is aimed ...
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What's it like inside a natural gas cavern on Earth?

I suppose natural gas underground caverns on Earth have substantial volume and gas is in gaseous form there. As such I wonder how it would look like inside such cavern (with artificial light of ...
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1answer
417 views

The youngest and oldest source rock for hydrocarbons in economic quantities

Most famous and productive source rocks for hydrocarbons are Paleozoic or Mesozoic, but there are also examples from the Neogene. Time is needed for the rock to reach the right depth and temperature ...
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243 views

Hydrocarbon potential in Ganges Brahmaputra delta

According to Curray (1991): Total sediment thickness beneath the [Ganges–Brahmaputra delta] southeast of the hingezone exceeds 16 km... Considering a normal geothermal gradient and data for oil ...
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1answer
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Incised valleys and hydrocarbon potential

The Wikipedia page on sequence stratigraphy states: Sandstone bodies associated with incised valleys are good hydrocarbon reservoirs. Can anyone elaborate on this statement and the reason behind ...
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Why is there so much oil in Saudi Arabia, Venezuela and Canada, but almost none in Europe?

Why do some countries have a lot of oil reserves, while some others don't?
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Is it feasible to use depleted oil wells for geothermal production?

There is an oil field outside my hometown. I wonder if it is feasible to use the same oil wells for geothermal production after oil production rate drops below profitable point.
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How does one create petroleum/crude oil for future generations?

I am a geological novice so maybe this is a wrong question. But the idea is to create a thought experiment. How does one "create" petroleum or crude oil for future generations? Is it enough to bury a ...
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Why would there be no hydrocarbons in the Sveconorwegian belt?

I've had an inconclusive chat about the Sveconorwegian belt of the Fennoscandian shield, the western parts in particular, and reasons as to why there would not be any deposits of hydrocarbons there. ...
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4answers
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How much oil is created each year?

We all know that oil is an essentially nonrenewable resource over human time scales. However, I am currently working on an activity for high schoolers that teaches them to predict how long humans can ...
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Estimating the permeability tensor of an oil field by remote sensing

I work a lot with numerical methods to solve multiphase flow in porous media for oil applications. In our field, we often use Darcy's law which states that the flux is negatively proportional to the ...