Scientists estimate a higher oil spill flow rate in gulf

Paula Dittrick
OGJ Senior Staff Writer

HOUSTON, May 27 -- US Geological Survey Director Marcia McNutt said a team of scientists and government officials reviewing the oil spill in the Gulf of Mexico came up with flow rate estimates of 12,000-25,000 b/d, depending on the methodology used.

McNutt reported initial findings of the Flow Rate Technical Group (FRTG) during a news conference from Washington, DC, on May 27. US Coast Guard Comm. Adm. Thad W. Allen assembled the group after the initial flow rate estimate came into question. BP PLC was not part of the group, but it provided information to the group.

Early in the spill response, USCG and BP estimated the spill flow rate at 5,000 b/d based on what McNutt called limited data.

“These numbers are still preliminary,” McNutt said of the FRTG numbers, adding different teams used different methods for initial estimates. Another team will release an estimate “in a few weeks,” she said.

A mass-balance team made its estimate based upon the volume of oil seen on the surface of the water, saying that it believed 130,000-270,000 bbl of oil was on the surface on May 17. Using that estimate along with calculations of oil already burned, skimmed, dispersed, or evaporated, the team calculated a flow rate estimate of 12,000-19,000 b/d.

McNutt noted that a plane can only fly over part of the spill in a single day so the team extrapolated for the entire spill area.

The plume modeling team observed video of oil and gas coming from a bend in the damaged riser or from the end of the riser. Its initial estimate was 12,000-25,000 b/d.

McNutt said estimates were difficult to make because an estimated 75% of the flow was natural gas. She also noted that the flow can vary in its GOR. She did not talk about pressure in any of the estimates.

Contact Paula Dittrick at paulad@ogjonline.com.

Related Articles

EPA approves Magellan’s Corpus Christi splitter project

12/12/2014 The US Environmental Protection Agency has issued a final greenhouse gas prevention of significant deterioration construction permit to Magellan Pr...

US needs more data before ending crude export ban, House panel told

12/11/2014 Much more environmental impact information is needed before the US can reasonably remove crude oil export limits, a witness told a House Energy and...

BOEM raises offshore oil spill liability limit to $134 million

12/11/2014 The US Bureau of Ocean Energy Management increased the liability limit for oil-spill related damages from offshore operations to $134 million from ...

Small subset of wells accounts for most methane emissions, researchers say

12/09/2014 A small subset of natural gas wells are responsible for most methane emissions from US natural gas production, said a study from the University of ...

Methane controls just part of complete climate strategy, speakers say

12/08/2014 Reducing oil and gas operations’ methane emissions is an essential, but far from the only, part of a comprehensive climate strategy, speakers at a ...

Cost-benefit believability

12/08/2014 In anticipation of what might become the costliest federal regulation in US history, Congress should join the Supreme Court in reviewing the Enviro...

EPA air proposals should recognize progress, API official says

12/08/2014 The US Environmental Protection Agency should recognize progress that is continuing before it considers imposing costly new air quality requirement...

EPA poses tighter ground-level ozone pollution controls

12/08/2014 The US Environmental Protection Agency proposed reducing ground-level emissions limits to 65-70 ppb from its current level of 75 ppb. It also will ...

API: Producers reducing methane emissions already

12/05/2014 US oil and gas producers are reducing wellhead methane emissions already and don’t need ill-conceived, overly prescriptive federal regulations, Ame...

White Papers

AVEVA NET Accesses and Manages the Digital Asset

Global demand for new process plants, power plants and infrastructure is increasing steadily with the ...
Sponsored by

AVEVA’s Approach for the Digital Asset

To meet the requirements for leaner project execution and more efficient operations while transferring...
Sponsored by

Diversification - the technology aspects

In tough times, businesses seek to diversify into adjacent markets or to apply their skills and resour...
Sponsored by

Engineering & Design for Lean Construction

Modern marketing rhetoric claims that, in order to cut out expensive costs and reduce risks during the...
Sponsored by

Object Lessons - Why control of engineering design at the object level is essential for efficient project execution

Whatever the task, there is usually only one way to do it right and many more to do it wrong. In the c...
Sponsored by

Plant Design for Lean Construction - at your fingertips

One area which can provide improvements to the adoption of Lean principles is the application of mobil...
Sponsored by

How to Keep Your Mud System Vibrator Hose from Getting Hammered to Death

To prevent the vibrating hoses on your oilfield mud circulation systems from failing, you must examine...
Sponsored by

Duty of Care

Good corporate social responsibility means implementing effective workplace health and safety measures...
Sponsored by

Available Webcasts


On Demand

Optimizing your asset management practices to mitigate the effects of a down market

Thu, Dec 11, 2014

The oil and gas market is in constant flux, and as the price of BOE (Barrel of Oil Equivalent) goes down it is increasingly important to optimize your asset management strategy to stay afloat.  Attend this webinar to learn how developing a solid asset management plan can help your company mitigate costs in any market.

register:WEBCAST


Parylene Conformal Coatings for the Oil & Gas Industry

Thu, Nov 20, 2014

In this concise 30-minute webinar, participants have an opportunity to learn more about how Parylene coatings are applied, their features, and the value they add to devices and components.

register:WEBCAST


Utilizing Predictive Analytics to Optimize Productivity in Oil & Gas Operations

Tue, Nov 18, 2014

Join IBM on Tuesday, November 18 @ 1pm CST to explore how Predictive Analytics can help your organization maximize productivity, operational performance & associated processes to drive enterprise wide productivity and profitability.

register:WEBCAST


US HYDROCARBON EXPORTS Part 3 — LNG

Fri, Nov 14, 2014

US LNG Exports, the third in a trilogy of webcasts focusing on the broad topic of US Hydrocarbon Exports.

A discussion of the problems and potential for the export of US-produced liquefied natural gas.

These and other topics will be discussed, with the latest thoughts on U.S. LNG export policy.

register:WEBCAST


Careers at TOTAL

Careers at TOTAL - Videos

More than 600 job openings are now online, watch videos and learn more!

 

Click Here to Watch

Other Oil & Gas Industry Jobs

Search More Job Listings >>
Stay Connected