New evidence supports 19th century idea on formation of oil and gas

November 4, 2009
An oil pump taps deposits of petroleum deep beneath the Earth. Scientists are reporting new evidence that oil may have originated from processes other that the decay of prehistoric plants. Credit: Wikimedia Commons

Scientists in Washington, D.C. are reporting laboratory evidence supporting the possibility that some of Earth's oil and natural gas may have formed in a way much different than the traditional process described in science textbooks.

Their study is scheduled for Nov./Dec. issue of ACS' Energy & Fuels, a bi-monthly publication. Anurag Sharma and colleagues note that the traditional process involves biology: Prehistoric plants died and changed into oil and gas while sandwiched between layers of rock in the hot, high-pressure environment deep below Earth's surface. Some scientists, however, believe that and gas originated in other ways, including chemical reactions between and below Earth' surface.

The new study describes a test of that idea, which dates to at least 1877 and famous Russian chemist Dimitri Mendeelev.

They combined ingredients for this so-called abiotic synthesis of methane, the main ingredient in , in a diamond-anvil cell and monitored in-situ the progress of the reaction. The diamond anvils can generate high pressures and temperatures similar to those that occur deep below Earth's surface and allow for in-situ optical spectroscopy at the extreme environments.

The results "strongly suggest" that some methane could form strictly from chemical reactions in a variety of chemical environments.

This study further highlights the role of reaction pathways and fluid immiscibility in the extent of hydrocarbon formation at extreme conditions simulating deep subsurface.

More information: "In Situ Diamond-Anvil Cell Observations of Methanogenesis at High Pressures and Temperatures", Energy & Fuels,

Source: American Chemical Society (news : web)

Explore further: An Inexhaustible Source of Energy from Methane in Deep Earth

Related Stories

An Inexhaustible Source of Energy from Methane in Deep Earth

September 15, 2004

Untapped reserves of methane, the main component in natural gas, may be found deep in Earth’s crust, according to a recently released report in the Proceedings of the National Academy of Sciences of the United States of ...

A new acceleration additive for making 'ice that burns'

October 23, 2006

Japanese scientists are reporting discovery of an additive that can speed up the formation of methane hydrates. Those strange substances have sparked excitement about their potential as a new energy resource and a deep freeze ...

Toward tapping the potential of 'stranded' natural gas

February 28, 2007

Newly discovered chemical catalysts may be an answer to the century-long search for economical ways of using natural gas now burned or "flared" as waste in huge quantities, scientists in the United States and Germany report. ...

Hydrocarbons in the deep Earth?

July 26, 2009

The oil and gas that fuels our homes and cars started out as living organisms that died, were compressed, and heated under heavy layers of sediments in the Earth's crust. Scientists have debated for years whether some of ...

Recommended for you

Organic semiconductors get weird at the edge

October 6, 2015

As the push for tinier and faster electronics continues, a new finding by scientists at the University of British Columbia (UBC) and Monash University could help inform the design of the next generation of cheaper, more efficient ...

New polymer creates safer fuels

October 1, 2015

Before embarking on a transcontinental journey, jet airplanes fill up with tens of thousands of gallons of fuel. In the event of a crash, such large quantities of fuel increase the severity of an explosion upon impact. Researchers ...

Researchers print inside gels to create unique shapes

September 30, 2015

(—A team of researchers at the University of Florida has taken the technique of printing objects inside of a gel a step further by using a highly shear-rate sensitive gel. In their paper published in the journal ...

1 comment

Adjust slider to filter visible comments by rank

Display comments: newest first

5 / 5 (3) Nov 04, 2009
Abiotic synthesis of lighter hydrocarbons is almost certain to take place. However, crude oil is made up of much more complicated molecules. Part of the argument for a biotic origin is the close resemblance of some of the larger molecules to those in plants that exist today. Specifically, there are porphyrin compounds and asphaltanes that would present challenges for abiotic syntheses but are very similar to chlorophyll and molecules forming structural sections of living plants. It is easy to form small molecules abiotically by squeezing hydrogen and CO2 at high temperatures and that can produce methane, ethane, and other materials that make natural gas. However, you need complex methods to synthesize something much larger or containing complex rings. They are going to have to have some new arguments to convince very many chemists that chlorophyll will be produced by CO2, H2, and pressure and temperature. ;-)

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.