Our website is made possible by displaying online advertisements to our visitors.

Please consider supporting us by disabling your ad blocker.
Sign in to follow this  
Followers 0
DarkKnightNomeD

Update - It looks bad - California Gas Leak - Porter Ranch methane well was under stress when it failed

2 posts in this topic

Shared by Erin Brockovich about an hour ago

Erin Brockovich - GREED & DISREGARD FOR SAFETY CAUSED THE BLOW OUT

Southern California Gas Company injected and withdrew gas through the entire diameter of the well, rather than only through the narrower tubing that runs down the middle of it; it was doing so when the well failure was discovered.

“It was on injection through both casing and tubing at the time”

Injecting through both casing and tubing means there was frequently pressure – about 2,600 pounds of pressure per square inch – on not only the 2⅞-inch tubing, but the 7-inch well casing, or wall.

 

Porter Ranch methane well was under stress when it failed

http://www.dailynews.com/environment-and-nature/20160119/porter-ranch-methane-well-was-under-stress-when-it-failed

Read the rest of the article in the link above.

-

The Southern California well that has gushed climate-changing methane into the sky for 89 days was operated in a way that is legal but risky, some well experts say.

Southern California Gas Co., a unit of San Diego-based Sempra Energy, injected and withdrew gas through the entire diameter of the well, rather than only through the narrower tubing that runs down the middle of it, Jason Marshall, chief deputy director of the agency that oversees the state oil and gas agency, confirmed. It was doing so when the well failure was discovered.

 

“It was on injection through both casing and tubing at the time,” Marshall said. “It’s a practice that has been occurring. It’s a practice that we need to look at seriously.”

Injecting through both casing and tubing means there was frequently pressure – about 2,600 pounds of pressure per square inch – on not only the 2⅞-inch tubing, but the 7-inch well casing, or wall.

When both tubing and casing of a well are pressurized and flowing gas, it means the space between them cannot be filled with a protective brine. That fluid does at least two things: It inhibits corrosion and can be used to help stifle a well that goes out of control.

 

“The safest thing to do is inject and withdraw only through the tubing,” said Paul Bommer, senior lecturer at the University of Texas Petroleum Engineering Department who teaches well drilling and production.

“That is the safety margin that is lost in doing it this other way.”

The damage around well SS 25, which was used both to store gas underground and to pump it back up, was discovered by a company employee on Oct. 23.

An inewsource review of state records shows SS 25 was injected every day in October – for a total of 24 days.

 

In addition, long stretches of the well’s casing are not cemented. Cement protects a well, separates it from any aquifers and binds it to surrounding rock.

“There is nothing protecting either the inside or the outside of the casing in this well,” said Anneliese Anderle, who worked in the oil and gas industry and as a state engineer for 40 years. She is now on retainer for a law firm representing residents of Porter Ranch, the Los Angeles County community nearest the well.

There have been more than 20 personal injury and property damage lawsuits filed against Southern California Gas Co. and state agencies that regulate it.

 

“Normally all gas wells would have all their production coming through tubing. The casing is then added protection,” Anderle said.

The Aliso Canyon Storage Facility provides the gas that is burned in 14 Southern California power plants. Natural gas is also used for restaurant cooking, refineries, and as basic material for making pharmaceuticals, chemicals and fertilizers.

As the gas disaster began, Aliso Canyon was approaching maximum storage. The country was setting records for gas stored underground in early November, said Chris McGill, a geologist with the American Gas Association. The amount of gas that went to power generation was also a record.

Edited by DarkKnightNomeD

Share this post


Link to post
Share on other sites

Alert: LA gas well has ‘destabilized’, large crater develops in area — Officials: “Could be catastrophic” — TV: Risk of massive fire, possible explosion — Expert: “If wellhead fails, the thing is just going to be full blast… a horrible, horrible problem” — Company refuses to provide photos or media access (VIDEO)

http://enenews.com/la-gas-destabilized-officials-could-be-catastrophic-tv-experts-highly-flammable-gas-creating-risk-massive-fire-explosion-professor-wellhead-fails-going-be-full-blast-itll-be-horrible-horrible-pr

Share this post


Link to post
Share on other sites
Guest
You are commenting as a guest. If you have an account, please sign in.
Reply to this topic...

×   You have pasted content with formatting.   Restore formatting

×   Your link has been automatically embedded.   Display as a link instead

Sign in to follow this  
Followers 0

Our website is made possible by displaying online advertisements to our visitors.

Please consider supporting us by disabling your ad blocker.