Summary
Peter talks with Safety Guy, whom he met on TikTok, about hydrogen sulfide after a dramatic H2S scene in a TV drama. Safety Guy explains that H2S targets the central nervous system and blocks oxygen absorption, and that giving victims water can wash down sulfurous acid. Safety Guy also describes how acid jobs can raise H2S levels, notes that much older production is never checked, and cites a six-person fatality on a Colorado dairy farm.
Hydrogen sulfide is one of the most dangerous hazards in the energy sector, making H2S safety oilfield protocols a matter of life and death. This invisible menace demands constant vigilance and adherence to strict safety measures. In a recent episode of the Local Energy podcast, host Peter Brecht sat down with industry expert "Safety Guy" to separate Hollywood fiction from the harsh realities of this toxic gas. Sparked by a dramatic scene in the hit show Landman, the conversation explored the true nature of H2S, its devastating effects on the human body, and the critical importance of emergency preparedness. Understanding its insidious nature is the bedrock of effective H2S safety strategies in the oilfield.
The Silent Threat: What Makes H2S So Deadly
Hydrogen sulfide (H2S) is a highly toxic, colorless gas that often evokes comparisons to cyanide in its rapid lethality. It primarily targets the central nervous system, effectively preventing the body from absorbing and utilizing oxygen. At high concentrations, this leads to rapid unconsciousness, respiratory failure, and ultimately, death. According to the Occupational Safety and Health Administration (OSHA), the permissible exposure limit for H2S is just 20 parts per million (ppm) as a ceiling concentration, underscoring its extreme toxicity.
One of the most insidious aspects of H2S is its ability to cause permanent vision loss. When the gas mixes with water—such as the moisture in our eyes or respiratory tract—it forms sulfurous acid. This potent chemical reaction can cause severe burns, blistering, and irreparable tissue damage. As Safety Guy explained, this makes immediate first aid incredibly delicate, as improperly administering water can inadvertently wash the acid further into the victim's system, exacerbating the injury.
The Science Behind H2S Toxicity
Beyond its immediate corrosive effects, hydrogen sulfide acts as a chemical asphyxiant at the cellular level. When inhaled, H2S rapidly enters the bloodstream and binds to iron-containing enzymes crucial for cellular respiration, particularly cytochrome oxidase. This binding inhibits the cells' ability to use oxygen, effectively shutting down the body's energy production. Consequently, vital organs, especially the brain and heart, quickly become starved of oxygen. Workers experience dizziness, confusion, nausea, and disorientation within moments.
The human olfactory system provides an early warning at very low concentrations, often described as the smell of rotten eggs. However, this defense mechanism is unreliable and dangerous. At slightly higher concentrations, H2S causes olfactory fatigue, desensitizing the sense of smell. This means a worker can no longer detect the gas, mistakenly believing the threat has dissipated, even as concentrations rise to lethal levels. Exposure to concentrations of 500-700 ppm can lead to collapse within minutes, while levels exceeding 1000 ppm can cause immediate unconsciousness and death within seconds, making robust H2S safety oilfield measures paramount.
Why Training and Preparation Are Non-Negotiable
Because H2S is a constant, unpredictable threat in oil and gas operations, rigorous training is a mandatory requirement across the industry. Yet, the routine nature of this training can sometimes foster a dangerous sense of complacency. When an alarm finally sounds on location, indicating a real gas release, the sudden reality of the situation can cause panic if the team is not adequately prepared to execute their emergency response plan effectively.
Effective H2S contingency plans involve detailed dispersion calculations to estimate the potential impact radius of a release. These calculations inform necessary safety perimeters, dictate evacuation routes, and establish muster points. Training also encompasses the correct use of personal protective equipment (PPE), including self-contained breathing apparatus (SCBA) and emergency escape respirators. The effectiveness of a team in an emergency ultimately boils down to how well individuals operate under pressure, their understanding of specific roles, and their unwavering adherence to established H2S safety oilfield protocols.
Historical Context: Learning from H2S Tragedies
The devastating power of hydrogen sulfide is tragically illustrated by numerous incidents throughout history. One particularly harrowing event occurred in Denver City, Texas, in 1975. A routine pigging operation on a crude oil pipeline unexpectedly released a cloud of highly concentrated H2S gas. The pipeline, unbeknownst to many, carried oil rich in hydrogen sulfide, and a leak developed, allowing the deadly gas to escape.
The toxic plume quickly spread, leading to a catastrophic loss of life. Nine people, including workers and nearby residents, perished from acute H2S exposure. This incident served as a stark reminder of the widespread danger H2S poses, not only to direct industry workers but also to communities situated near oil and gas infrastructure. The Denver City tragedy underscored the critical need for enhanced monitoring, robust containment strategies, and comprehensive emergency response plans to prevent such disasters from recurring and to bolster overall H2S safety oilfield practices.
The Hidden Dangers of Acid Treatments and Venting
The concentration of H2S in a well is not static; it can fluctuate significantly based on operational activities and reservoir conditions. For instance, routine maintenance procedures such as acid treatments or tubing flushes can dramatically increase the H2S concentration in a well, measured in parts per million. These chemical reactions can liberate previously dissolved H2S or create new H2S as a byproduct, turning a well that previously showed low levels of the gas into a highly toxic environment within moments.
Furthermore, H2S can be released through standard equipment venting, often in areas assumed to be low-risk. Storage tanks equipped with pressure relief valves and thief hatches are designed to vent gas to maintain proper pressure. If the water or crude oil in these tanks contains H2S, the vented gas will also be toxic, posing a significant threat to nearby personnel. This highlights the absolute necessity of continuous atmospheric monitoring, even on older production sites or facilities where H2S might not have been historically expected. Such diligence is fundamental to comprehensive H2S safety oilfield management.
Confined Space Hazards and the "Rescue Cascade"
The dangers of H2S extend far beyond the direct oilfield environment, affecting industries like agriculture, wastewater management, and construction. A stark reminder of this universal threat occurred recently at a Colorado dairy farm, where six workers tragically lost their lives due to H2S exposure in a confined space. This incident underscores a grim statistic: approximately 80 percent of fatalities in confined spaces are would-be rescuers.
When a worker collapses from H2S exposure in a confined space, the natural human instinct is to rush in and help. However, without proper respiratory protection and a meticulously planned rescue strategy, the rescuer quickly becomes the next victim. This "rescue cascade" is a well-documented phenomenon that emphasizes the critical rule of never entering a potentially toxic atmosphere without the appropriate safety gear, proper training, and a standby rescue team equipped with SCBA. Proper H2S safety in oilfield confined spaces requires permits, continuous gas monitoring, ventilation, and strict entry procedures.
H2S Safety Oilfield: Advanced Detection and Personal Protective Equipment
Modern technology plays a pivotal role in enhancing H2S safety in oilfield operations through advanced detection and personal protection. Sophisticated gas monitors, both personal and area-based, continuously sample the air for H2S levels. Personal monitors, worn by individual workers, provide real-time readings and audible/visual alarms that alert the wearer to immediate danger. Fixed-site monitors, strategically placed throughout facilities, offer broader area surveillance and can integrate with facility-wide alarm systems.
However, the effectiveness of these devices relies heavily on proper calibration, maintenance, and regular bump testing. Workers must also be proficient in using appropriate respiratory protection. A self-contained breathing apparatus (SCBA) provides an independent air supply for entry into IDLH (Immediately Dangerous to Life or Health) atmospheres. Supplied-air respirators (SARs) or airline respirators provide a longer duration of clean air by connecting via hoses to a remote air source. Understanding the limitations and correct application of each piece of equipment is crucial for safeguarding personnel in H2S environments.
Final Thoughts
Hydrogen sulfide remains a formidable villain in industry, demanding unwavering respect and strict adherence to safety protocols. The dramatic portrayals in shows like Landman serve as a chilling reminder of the very real dangers workers face every day. By prioritizing comprehensive training, continuous monitoring, and disciplined emergency response, the industry can significantly mitigate these risks and protect its workforce. Implementing robust H2S safety strategies in the oilfield saves lives. Be sure to listen to the full episode of Local Energy to hear more of Safety Guy's invaluable insights on this critical topic.
🎙 Listen to the full episode on YouTube or Spotify. Not financial advice. Do your own research.
Host
Peter Brecht
Peter loves bringing out the best in people. He lives in California and insures high-risk industries.
Transcript
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Peter Brecht00:00
Hey, what's up, man? How are you?
Safety Guy00:01
Good, how are you? How are you?
Peter Brecht00:02
I'm good, I'm excited. So for our guests that have never watched our show before, this is Safety Guy. We met on TikTok of all places, but you're kind of known as the Safety Guy. So.
Safety Guy00:14
Yeah, yeah,
I kind of so I'm not really doing safety a lot much anymore these days, but took it and ran with it. I took the name that wasn't being used. I took it and ran with it.
Peter Brecht00:22
Yeah.
Yeah, it makes sense. I mean, it's a good handle too, you're probably so we've talked a couple of times. You're probably one of the most chill people that I've ever talked to. Like if you were my safety guy, I would feel just comfortable. You know what I mean? Like you put everyone at ease real well But what I want to talk about today is H2S Wells.
So we were talking about
Land man and I know you haven't seen this episode yet and it's totally fine but there's this scene where they're all you know driving through and you know they're actually going hunting and one guy gets out of the truck and like they all fall down and die and it's like super dramatic and obviously it's a TV show it should be right everyone's trying to get a little entertainment but then the crew comes in the exactly the crew comes in to take care of it and like they can't
Safety Guy01:07
Right, right. It's a drama, not a documentary.
Peter Brecht01:14
Figure out what's going out, because the winds go in the other direction. And all of a sudden the wind flips back on them and they all freak out. Like the H2S monitors are going off and they're trying to scramble to get masks. Part of the storyline, one of the guy loses his vision. And my wife, who doesn't know about any of this stuff, is sitting there on the couch with me and she's like, oh my God, what's going on? This is like, it looks like a horror film. The way that they film it is like this unknown thing is killing people. But it's H2S, right?
Safety Guy01:18
Mm-hmm.
Peter Brecht01:42
So I wanted to just bring this back to reality and maybe walk through some of that. I know it is extremely dangerous. Know there's horrible cases where people have lost vision and lives even. And I just want to like, kind of, let's, that's kind of like, I guess, get back to fundamentals for a minute on what it is.
Safety Guy01:58
Yeah, so H2S is a very, very bad chemical. You can equate it to cyanide. It's pretty close. And the thing with H2S is it not only targets your central nervous system, but it also removes the oxygen, or it makes your body where you can't absorb oxygen. So it's really a lights out ordeal. And the way you're saying they dramatize the event, it can happen that way. It can be, we,
We train on H2S all the time, right? So when it really happens and somebody goes down, it can be, it can be very dramatic. It's really about how well your team operates, in an emergency situation. That's really what it boils down to and how well you've prepared for that. Because with H2S in our industry, we train on it all the time. It's something we train on every year. Every year we do H2S training and, but you never.
Peter Brecht02:37
Okay.
Safety Guy02:46
If you've never had an alarm go off on location, then it almost becomes like a fictional character, right? Something we train for that's really never gonna happen. So then when it does happen, it can truly cause pandemonium and the loss of vision. So you mentioned that was part of the episode. That is a very, very real possibility with H2S at high concentrations. H2S will...
Peter Brecht02:55
Yeah. Yeah.
Safety Guy03:09
Mix with water and turn into sulfurous acid. Our body is made up of water, right? So one of the worst things you can do with rescue or when first aid treatment for H2S is fill somebody's mouth full of water, like give them a give them a big drink. Because what you're doing is if there's sulfurous acid is in their mouth and in their throat, things like that, you're washing it down. And it's probably going to metabolize in their liver. I'm not a doctor.
Peter Brecht03:14
Mm-hmm.
My gosh.
Safety Guy03:37
But you got to think
It dissolves in water, right? And our body's made up of that. So you've got to think that through when you start doing first aid, somebody had a really big exposure to H2S.
Peter Brecht03:48
Man, that is, that's gnarly. So I'm thinking through, so you guys are training on this all the time. It's there, there's H2S wells like that are, that are more like, like think about this, right? So in the show, they come across a well.
That's just not properly plugged. I think that's the story at least, right? But like, are there sites that maybe like that are dangerous because they're not properly plugged or like what's the story around that? Like could a common person just come across one?
Safety Guy04:14
Well, so...
Here's what, here's what, and I know you do a lot of work with Wade, here's something I've had to have discussions with engineers about. In order to increase the potency of H2S or increase the parts per million of H2S, would treat it with acid to make it stronger, right? So when we do like a tubing flush or run an acid job on tubing, high chances are you're gonna increase H2S if there's any in that well to begin with.
Peter Brecht04:22
Yeah.
Hmm.
Safety Guy04:44
You may see, we've had wells in the past that doubled and tripled in parts per million on H2S because we ran a NASA job. So the answer to that is yes. A lot of times you will see there'll be a well side by side. You can have a well side by side and one well be super high in H2S and the next well will have nothing. I mean, in your water tanks and your gas stream,
Peter Brecht04:44
Okay. Okay.
Safety Guy05:09
We've had chemical companies treat our water tanks and actually spike the H2S in the water tanks, but we weren't seeing much in the gas stream. So yes, you can have a well that not be properly capped, which that's what I do now, right on the environmental side. I go around looking for leaks, but on each set of tanks, we have pressure relief valves and inardos and thief hatches. And that's what they do. They're made to vent.
Peter Brecht05:30
Okay.
Safety Guy05:33
So on a no well where your thief hatches are bending off gas, if you've got H2S in your tanks and the water, then yeah, chances are you're gonna have H2S leaving. It needs to be, so with every H2S well we drilled, we did an H2S contingency plan and there was a factor in there where you punch in the numbers. The best estimated...
Peter Brecht05:33
Right.
Safety Guy05:53
Highest estimated H2S parts per million we expect on that location and it spits out a formula and it tells you at 100 feet the parts per million should be this at a thousand feet it should be this and for it to be far enough to get off a location to actually cause issues off location you're talking about a very very high high part per million on that well because it's dispersing in there right
Peter Brecht06:18
Okay. Okay.
Yeah, so our, what's one of the chances of me just walking around, coming across something like that? It like, or is it like pretty well monitored? And these sites and tanks are checked frequently enough to where we would have a known problem and we could resolve it.
Safety Guy06:39
I don't want to put our industry out on blast, but there's a lot of older production that we never check for H2S. And typically we check for H2S in areas that we know. A lot of times companies that have chemical companies for that location running scavenger or emulsifier, they will sometimes do tests.
Peter Brecht06:44
Yeah, yeah.
Yeah.
Yeah.
Mm-hmm.
Safety Guy07:04
To check for H2S on that location. But typically we do that on wells where we know or expect there's H2S on that location. So the crazy thing is, H2S is not specific to oil and gas. Colorado just had six person fatality on a dairy farm. And that is what we teach when we teach in confined spaces. 80 % of fatalities in confined spaces are would be rescuers.
Peter Brecht07:07
Yeah.
Yeah.
Mm-hmm.
Man.
Safety Guy07:29
And that's exactly what happened.
Peter Brecht07:29
Yeah.
Safety Guy07:30
A guy went down in a pit on that farm and five other guys went one after the other trying to rescue those guys. And they just kept passing one after another. And it was H2S on the bottom of that pit. You have likely smelt H2S. If you pass by sewer ponds and things like that and you get the rotten egg smell, chances are there's H2S in those ponds and that's what you're smelling. People smelled all the time.
Peter Brecht07:39
My gosh.
Yeah.
Mm-hmm.
Got it.
Yeah, it's that it's kind of that sulfur rotten egg smell. Yeah. Yeah.
Safety Guy07:57
But to the, yes, yes, absolutely. And to the dramatic
Effect of a movie, it can happen. Yes, absolutely. You can have an H2S release on location and it affect people off location, but the H2S would need to be significant on that lease for that to happen. It happened in Denver city, Texas. There's a story you can look up in Denver city, Texas, where a company was
Peter Brecht08:17
Okay.
Safety Guy08:24
They were actually using H2S in a manufacturing process or something. And there was a pipeline leak behind a family's house in Denver City. It was in Denver City or Colorado City, but it killed a whole family.
Peter Brecht08:31
Okay.
Yeah. Wow. That's horrible. So there's definitely a lot going on here with this. If I ever
I guess I need to tune up my H2S monitor when I'm out there on site, but gotta have one on. Absolutely. But yeah. So Taylor Sheridan wasn't, yeah, yeah. He wasn't too far off. I mean, he's looking for, villains and things to put in the show. And it sounds like, this was an appropriate one to feature for sure. But man, yeah.
Safety Guy08:49
Yeah. Yeah.
Always.
H2S is definitely a villain in our industry. Absolutely. It's one of the most
Dangerous aspects.
Peter Brecht09:09
Yep, man. Well, good to know. Safety Guy, am so thankful for you taking time pulling over on the side of the road to just talk with me about this and we'll have to catch you on the next one. Yeah, good stuff, man. I'll see you soon.
Safety Guy09:16
Yeah, I appreciate it. I appreciate you having me. Yeah, absolutely. All
Right, thank you.
Peter Brecht09:23
Later.