Selected category: produced water

New study reveals gaps in the methods used to assess chemicals in oilfield wastewater

A new study led by researchers with Colorado School of Mines exposes limitations with the current methods used to detect chemicals in oilfield wastewater and offers solutions to help regulators make better decisions for managing this waste stream.

Oilfield wastewater is extremely salty and can contain multiple combinations of many potentially harmful chemicals (approximately 1600 on a national basis). However, most standard or approved analytical methods available to regulators were designed to work with fresh water. Because oil and gas wastewater is so salty—sometimes 10 times saltier than seawater or more—chemists often have to dilute wastewater samples to manage the high salt content.

This means they may also be diluting chemicals of concern to concentrations too low to detect, even though they may be present at risky levels. For example, benzene is a chemical associated with petroleum hydrocarbons and a known carcinogen. It also has a drinking water standard of 5 parts per billion – that’s 5 cents in 10 million dollars. It really doesn’t take much dilution of a sample to lose that level of precision. Read More »

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Report identifies ways to reduce water contamination from oil and gas development in Texas

A new report from the Academy of Medicine, Engineering and Science of Texas (TAMEST) is shedding more light on what we know and don’t know about the potential health and environmental impacts caused by oil and gas development in Texas.

The report, the first of-its-kind authored by experts across the state, looks at all areas of concern related to oil and gas – including seismicity, air pollution, land and traffic issues  – but TAMEST’s observations about the risks to water are especially noteworthy.

Read More »

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New report offers long-awaited answers about reusing oil and gas industry’s wastewater

A new report from the Oklahoma Water Resources Board’s (OWRB) Produced Water Working Group indicates that oil and gas companies looking for ways to dispose of large volumes of wastewater should focus on recycling those liquids within the oil and gas fields, and not – as some suggest – use it for irrigation or other surface applications where human and environmental exposure is a risk.

The Produced Water Working Group, a panel of 17 state experts convened by Oklahoma Governor Mary Fallin in December, 2015, to study various options for wastewater reuse, determined that treating wastewater for use outside of the oil field is not economical, nor are the environmental and health risks well understood.

In fact, the Working Group didn’t evaluate health and environmental risks for any of the 10 alternative uses evaluated. While research into reducing the cost of desalination, by powering treatment facilities with solar or excess lease gas, for example, may be promising, it won’t be sufficient to green light uses that introduce oil and gas wastewater into contact with communities and ecosystems.

To that end, the OWRB recommends that scientific efforts should be devoted to “identifying toxicological risks and protective water quality targets to ensure that the environment and public health are adequately protected under various reuse scenarios.” This is exactly right. Read More »

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Scientists Question Risks of Using Oilfield Wastewater on Food Crops

The engineers and scientists who study the oil and gas industry’s wastewater know the term “beneficial reuse” well. It’s the seldom-used technique of taking wastewater produced from an oil or gas well, treating it, and then using it for other purposes — like watering crops (including organic crops) or feeding livestock.  It’s a rare practice that drought-stricken areas like California have used for a number of years, although little is known about associated health or safety risks since, usually, about 98% of wastewater is injected into disposal wells deep underground. However, as demands for water increase, and concerns about disposal wells (which have been linked to earthquakes) rise, beneficial reuse is being considered as a viable option.

But just because we can use wastewater for other purposes – does that mean we should? Read More »

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Why 10,000 Spills From Oil and Gas Development Can’t Be Ignored

THe "Texon Scar" A massive release of produced water from an oil well in West Texas caused a vegetative dead zone that can be seen from space

The "Texon Scar"
A massive release of produced water from an oil well in West Texas caused a vegetative dead zone that can be seen from space.

Oil and gas development produces massive amounts of air and water pollution that can have severe impacts on our communities and ecosystems.  And data in a recent investigative article could help us understand more about where and how much oil, wastewater, and other fluids are spilled across the country.

According to an EnergyWire  article by Pamela King and Mike Soraghan, in 2015 industry reported more than 10,000 cases of spills across the country.  That amounts to 42 million gallons of harmful fluids – 12 million gallons more than previously reported.
Read More »

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What We Know – And Don't Know – About Toxic Wastewater From The Oil And Gas Industry

By Cloelle Danforth and Steve Hamburg

For all that we hear and think about oil and gas production, wastewater may not be at the top of our list of concerns. And yet, onshore oil and gas operations in the United States produce more than 800 billion gallons of toxic wastewater each year.

Most oil and gas companies either dispose of this water deep underground, or recycle it for use in other wells. But a growing number of operators are now considering alternate ways to discharge or reuse this water above ground.

Before we can effectively manage this influx of wastewater in new ways, we need to have a better understanding of what’s in it. Read More »

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