Featured Research

from universities, journals, and other organizations

Research could lead to improved oil recovery, better environmental cleanup

Date:
August 2, 2012
Source:
Oregon State University
Summary:
Researchers have taken a new look at an old, but seldom-used technique developed by the petroleum industry to recover oil, and learned more about why it works, how it could be improved, and how it might be able to make a comeback not only in oil recovery but also environmental cleanup.

Oil in pores.
Credit: Image courtesy of Oregon State University

Researchers have taken a new look at an old, but seldom-used technique developed by the petroleum industry to recover oil, and learned more about why it works, how it could be improved, and how it might be able to make a comeback not only in oil recovery but also environmental cleanup.

The technology, called "microbial enhanced oil recovery," was first developed decades ago, but oil drillers largely lost interest in it due to its cost, inconsistent results and a poor understanding of what was actually happening underground.

The new findings by engineers at Oregon State University, published in the Journal of Petroleum Science and Engineering, could help change that. This may allow the oil industry not only to produce more oil from their existing wells, but also find applications in cleaning up petroleum spills and contaminants.

"This approach of using microbes to increase oil recovery was used somewhat in the 1980s when oil prices were very high, but the field results weren't very consistent and it was expensive," said Dorthe Wildenschild, an associate professor in the OSU School of Chemical, Biological and Environmental Engineering. "It's seldom used now as a result."

Oil drilling has always been difficult -- it's not as simple as drilling a hole and watching the petroleum gush out of the ground.

That may happen for a while, but as a secondary step, water is often injected into the well to help flush out more oil. Such production techniques generally recover only one-third to one-half of the oil originally present in a reservoir.

A third approach sometimes used after water injection is to inject microbes into the well and "feed" them with sugars such as molasses to encourage their growth. This can clog some pores and in others has a "surfactant" effect, loosening the oil from the surface it clings to, much as a dishwasher detergent loosens grease from a pan.

"By clogging up some pores and helping oil move more easily through others, these approaches can in theory be used with water flushing to help recover quite a bit more oil," Wildenschild said.

The surfactant can be human-made, or microbes can be used to produce it at a lower cost. However, getting a particular culture of microbes to produce the biosurfactant under harsh field conditions is tricky.

"It's complicated, you have to use just the right microbes, and feed them just the right foods, to accomplish what you want to do," Wildenschild said.

In OSU laboratory experiments, Ryan Armstrong, a recent doctoral graduate at OSU, found that the clogging mechanism is the simplest and most effective approach to use, although combining it with the biosurfactant technology achieved optimal oil recovery.

A better fundamental understanding of this process -- along with higher oil prices that better reward efforts to recover more oil -- could lead to renewed interest in the technology on a commercial basis, the OSU researchers said, and make oil recovery more productive. As an extra benefit, the concepts might also work well to help remove or clean up underground contaminants, they said.

This work was supported by the Petroleum Research Fund of the American Chemical Society.


Story Source:

The above story is based on materials provided by Oregon State University. Note: Materials may be edited for content and length.


Cite This Page:

Oregon State University. "Research could lead to improved oil recovery, better environmental cleanup." ScienceDaily. ScienceDaily, 2 August 2012. <www.sciencedaily.com/releases/2012/08/120802141425.htm>.
Oregon State University. (2012, August 2). Research could lead to improved oil recovery, better environmental cleanup. ScienceDaily. Retrieved April 18, 2014 from www.sciencedaily.com/releases/2012/08/120802141425.htm
Oregon State University. "Research could lead to improved oil recovery, better environmental cleanup." ScienceDaily. www.sciencedaily.com/releases/2012/08/120802141425.htm (accessed April 18, 2014).

Share This



More Earth & Climate News

Friday, April 18, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

The Great British Farmland Boom

The Great British Farmland Boom

Reuters - Business Video Online (Apr. 17, 2014) Britain's troubled Co-operative Group is preparing to cash in on nearly 18,000 acres of farmland in one of the biggest UK land sales in decades. As Ivor Bennett reports, the market timing couldn't be better, with farmland prices soaring over 270 percent in the last 10 years. Video provided by Reuters
Powered by NewsLook.com
Small Reactors Could Be Future of Nuclear Energy

Small Reactors Could Be Future of Nuclear Energy

AP (Apr. 17, 2014) After the Fukushima nuclear disaster, the industry fell under intense scrutiny. Now, small underground nuclear power plants are being considered as the possible future of the nuclear energy. (April 17) Video provided by AP
Powered by NewsLook.com
Change of Diet Helps Crocodile Business

Change of Diet Helps Crocodile Business

Reuters - Business Video Online (Apr. 16, 2014) Crocodile farming has been a challenge in Zimbabwe in recent years do the economic collapse and the financial crisis. But as Ciara Sutton reports one of Europe's biggest suppliers of skins to the luxury market has come up with an unusual survival strategy - vegetarian food. Video provided by Reuters
Powered by NewsLook.com
How Mt. Everest Helped Scientists Research Diabetes

How Mt. Everest Helped Scientists Research Diabetes

Newsy (Apr. 15, 2014) British researchers were able to use Mount Everest's low altitudes to study insulin resistance. They hope to find ways to treat diabetes. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins