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Peak Oil v Peak Gas

General discussions of the systemic, societal and civilisational effects of depletion.

Peak Oil v Peak Gas

Unread postby spot5050 » Tue 17 Oct 2006, 19:04:29

I haven't been to this site for a while so forgive me if things have moved on and the following has been debated already.

Natural gas can be used as a substitute for many oil products. For example, electricity in the UK is generated by both oil and gas-fired powerstations. Likewise fertiliser. Cars can be converted to run on natural gas for about 2,000 GBP per vehicle, and there are many more examples.

Because peak-gas is predicted to occur after peak-oil, then maybe the most significant event event for the economy - and therefore my lifestyle - isn't peak-oil, but peak-gas.

The above doesn't negate the concept of "peak-energy", but the thought of a few more years breathing-space is rather appealing.
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Re: Peak Oil v Peak Gas

Unread postby Laughs_Last » Tue 17 Oct 2006, 20:38:39

NG does not transport as easily as crude. [deleted by author]
Last edited by Laughs_Last on Sun 04 Nov 2007, 23:02:21, edited 1 time in total.
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Re: Peak Oil v Peak Gas

Unread postby ReserveGrowthRulz » Tue 17 Oct 2006, 23:11:22

$this->bbcode_second_pass_quote('Laughs_Last', ' ') Also, due to gas wells rapidly losing pressure at the end of production, Peak NG may come with little (obvious) warning.


Peak NG and your theory on gas wells losing pressure without warning have absolutely nothing in common.

You are confusing overall resource production and depletion effects with an inaccurate characterization of natural gas production operations.

Sorry, but the reservoir engineer in me couldn't let something this far off base slip by without saying something.
So....heading into our 3rd year post peak and I'm still getting caught in traffic jams!! DieOff already!
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Re: Peak Oil v Peak Gas

Unread postby Micki » Tue 17 Oct 2006, 23:40:15

Have the NG extraction charts taken into account increased extraction after we hit PO?

I can't seem to find the darn charts now, but generally they show that NG peaks some years after oil.
But if we experience for instance 5-7% decline in oil extraction this needs to be met with increased NG extraction and this should lead to a sooner peak.


$this->bbcode_second_pass_quote('', 'B')ecause peak-gas is predicted to occur after peak-oil, then maybe the most significant event event for the economy - and therefore my lifestyle - isn't peak-oil, but peak-gas.


You will still feel the effect even during the PO and PNG.

Increased demand for NG will drive prices up (personal cost, recession/depression risks). Also transportation needs to be converted from oil to NG. i.e. private cars need to have engines converted and NG tanks installed. Can we do this for all the cars at a reasonable cost and within a limited timeframe?

I'm sure you will get Lots of other reasons to worry from the other writers. :-)
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Re: Peak Oil v Peak Gas

Unread postby NEOPO » Tue 17 Oct 2006, 23:49:00

$this->bbcode_second_pass_quote('ReserveGrowthRulz', '')$this->bbcode_second_pass_quote('Laughs_Last', ' ') Also, due to gas wells rapidly losing pressure at the end of production, Peak NG may come with little (obvious) warning.


Peak NG and your theory on gas wells losing pressure without warning have absolutely nothing in common.

You are confusing overall resource production and depletion effects with an inaccurate characterization of natural gas production operations.

Sorry, but the reservoir engineer in me couldn't let something this far off base slip by without saying something.


JD - Stop twisting peoples words you silly silly man!! ;-)
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Re: Peak Oil v Peak Gas

Unread postby ReserveGrowthRulz » Wed 18 Oct 2006, 00:27:16

$this->bbcode_second_pass_quote('NEOPO', '')$this->bbcode_second_pass_quote('ReserveGrowthRulz', '')$this->bbcode_second_pass_quote('Laughs_Last', ' ') Also, due to gas wells rapidly losing pressure at the end of production, Peak NG may come with little (obvious) warning.


Peak NG and your theory on gas wells losing pressure without warning have absolutely nothing in common.

You are confusing overall resource production and depletion effects with an inaccurate characterization of natural gas production operations.

Sorry, but the reservoir engineer in me couldn't let something this far off base slip by without saying something.


JD - Stop twisting peoples words you silly silly man!! ;-)


While I recognize that misinformation is a staple of the Doomer creed, when talking about the industry which powers the modern world, it is better to be concise than not.

Oh...and I'm not JD.
So....heading into our 3rd year post peak and I'm still getting caught in traffic jams!! DieOff already!
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Re: Peak Oil v Peak Gas

Unread postby RockHind » Wed 18 Oct 2006, 00:36:57

$this->bbcode_second_pass_quote('ReserveGrowthRulz', '')$this->bbcode_second_pass_quote('Laughs_Last', ' ') Also, due to gas wells rapidly losing pressure at the end of production, Peak NG may come with little (obvious) warning.


Peak NG and your theory on gas wells losing pressure without warning have absolutely nothing in common.

You are confusing overall resource production and depletion effects with an inaccurate characterization of natural gas production operations.

Sorry, but the reservoir engineer in me couldn't let something this far off base slip by without saying something.



To further the general education of the board, could you properly characterize natural gas production operations with respect to production curves for us?
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Re: Peak Oil v Peak Gas

Unread postby ReserveGrowthRulz » Wed 18 Oct 2006, 02:06:10

$this->bbcode_second_pass_quote('RockHind', '
')To further the general education of the board, could you properly characterize natural gas production operations with respect to production curves for us?


To answer that question, you have to impose the qualifier "under what operating parameters".

For example, dual permeability systems, such as those demonstrated in hydro-frac'ed wells in low perm formations ( the frac itself tapping into natural fractures which have near infinite conductivity being one, and matrix permeability being the other )often display a hyperbolic decline, with a steep initial decline and the potential for production nearly leveling off, and lasting decades.

Better permeability formations will often display a more exponential decline, and the best formations can have a flat and stabilized decline rate until abandonment pressure is reached, at which point they can literally stop.

Because engineers watch flowing pressures as part of their daily routine it isn't difficult to make a prediction as to the time period in which a given well will produce. Reserves are booked knowing this information, and the declines, or lack thereof, are incorporated into this estimate. So its not that one day, production simply vanishes. You have the life of a companies entire reserve base to figure out on what day/month/year there production will "stop", assuming no further capital investment.

I also might mention that my specialty is more towards unconventional accumulations and well performance, and in that area, alot of the production available isn't even classified as "reserves" because of the low volumes involved. The advantage of these "reserves sorta" is that they last a LONG time, and pressure isn't the issue at all related to their longevity, but the economics of small fields/wells performance.

Did you have a specific set of operating conditions in mind? Offshore, onshore, conventional, unconventional, good perm, bad perm, associated gas or free?
So....heading into our 3rd year post peak and I'm still getting caught in traffic jams!! DieOff already!
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Re: Peak Oil v Peak Gas

Unread postby sch_peakoiler » Wed 18 Oct 2006, 02:36:30

$this->bbcode_second_pass_quote('spot5050', 'I') haven't been to this site for a while so forgive me if things have moved on and the following has been debated already.

The above doesn't negate the concept of "peak-energy", but the thought of a few more years breathing-space is rather appealing.


Peakoil is still very important for one simple reason, with one IF.
IF the decline of oil is _minimum_ 2% per year (optimistic forecasts) - then there is almost no way to increase NG production so rapidly as to compensate for
a) growing demand for Gas
b) declininig oil

so the effect would be that the overall available energy from oil+gas will be diminishing. This would mean that despite growing NG production prices will still climb up (with one IF - IF no depression happens)

In pessimistic forecastst oil decline is 5% or even 8% (doomer hardcore). In such scenarios it is even less probable that NG production can step up.

But if PO is followed by a lesser decline than the forecasted 2%, then yes, the NG will amend the situation, although its influence will be regional - because of no so flexible distribution infrastructure.

In UK the infrastructure is rather good, because it has a direct pipeline from Europe (Interconnector) and from Norwege (I am not sure if the pipeline is ready yet).

By the way, UK has already had its local PO and PG. Just for your information:)
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Re: Peak Oil v Peak Gas

Unread postby Laughs_Last » Wed 18 Oct 2006, 09:02:50

$this->bbcode_second_pass_quote('RockHind', '')$this->bbcode_second_pass_quote('ReserveGrowthRulz', '')$this->bbcode_second_pass_quote('Laughs_Last', ' ') Also, due to gas wells rapidly losing pressure at the end of production, Peak NG may come with little (obvious) warning.


Peak NG and your theory on gas wells losing pressure without warning have absolutely nothing in common.

You are confusing overall resource production and depletion effects with an inaccurate characterization of natural gas production operations.

Sorry, but the reservoir engineer in me couldn't let something this far off base slip by without saying something.



To further the general education of the board, could you properly characterize natural gas production operations with respect to production curves for us?


I can't find a good jpg to link to, but here's a PDF from EOG Resources, Inc.

[edit: here's a wide jpg]

Overall production has been relatively flat for at least a decade. However, each year in increasing number of new wells are needed in North America.

Overall production is an aggregate of individual production. RGR, can you provide us with a more accurate characterization of individual gas well production?
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Re: Peak Oil v Peak Gas

Unread postby mekrob » Wed 18 Oct 2006, 09:25:11

Something to add to sch_peakoiler's comments:

Oil provides 40% of the world's energy, while natural gas only 20% (roughly). So even a 2% decline in oil production would require a 4% increase in NG. In subsequent years, the needed increase would be less as the amount of oil taken offline would be less than the previous years, but a significant increase would be required.

And given all of the news about Ghawar, Burghan, North Sea, Cantarell, North Slope, etc, it seems highly unlikely that we'll manage only 2% decline rate. I believe even CERA thinks ~5% is accurate.
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Re: Peak Oil v Peak Gas

Unread postby ReserveGrowthRulz » Wed 18 Oct 2006, 11:37:20

$this->bbcode_second_pass_quote('Laughs_Last', '
')
Overall production has been relatively flat for at least a decade. However, each year in increasing number of new wells are needed in North America.


Decreasing well productivity is a standard item in a mature area, and the US is most definitely mature.


$this->bbcode_second_pass_quote('Laughs_Last', '
')Overall production is an aggregate of individual production. RGR, can you provide us with a more accurate characterization of individual gas well production?


Are you familiar with hyperbolic and exponential declines? From these you can pretty much build the production profile for nearly anything except big conventional gas fields, or associated gas from oilfields.
So....heading into our 3rd year post peak and I'm still getting caught in traffic jams!! DieOff already!
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Re: Peak Oil v Peak Gas

Unread postby sch_peakoiler » Wed 18 Oct 2006, 11:43:17

RGR,

can you please as an industry man comment on UK oil and gas production figures as found in the BP annual energy outlook?

I deducted from them, that UK peaked both in oil and gas but maybe you can explain them more in detail and maybe that is not the peak yet.
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Re: Peak Oil v Peak Gas

Unread postby TorrKing » Wed 18 Oct 2006, 12:10:06

The Norway-UK pipeline was officially opened Monday to my recollection. I think it will be losing pressure quite rapidly (well, not in days or months, but years) as we are thinking of utilizing more of it at home. Several LNG powerplants are under planning in Norway.
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Re: Peak Oil v Peak Gas

Unread postby RockHind » Wed 18 Oct 2006, 17:40:35

$this->bbcode_second_pass_quote('ReserveGrowthRulz', '')$this->bbcode_second_pass_quote('RockHind', '
')To further the general education of the board, could you properly characterize natural gas production operations with respect to production curves for us?


Did you have a specific set of operating conditions in mind? Offshore, onshore, conventional, unconventional, good perm, bad perm, associated gas or free?


Thanks, as my overall knowledge is somewhat rudimentary, I did not have a specific set of operating conditions in mind.
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Re: Peak Oil v Peak Gas

Unread postby spot5050 » Mon 23 Oct 2006, 23:41:40

$this->bbcode_second_pass_quote('Laughs_Last', 'D')ue to transport, peak oil’s effect will be roughly the same throughout the world at the same time. Peak NG will be a more regional event.

Yes L_L, I can see you are right. I was thinking from a UK perspective.

$this->bbcode_second_pass_quote('Micki', 'H')ave the NG extraction charts taken into account increased extraction after we hit PO?

There's not much talk of peak-gas, so I suspect not.

$this->bbcode_second_pass_quote('Micki', 'A')lso transportation needs to be converted from oil to NG. i.e. private cars need to have engines converted and NG tanks installed. Can we do this for all the cars at a reasonable cost and within a limited timeframe?

Yes the conversion from petrol to NG is viable. I got a lift home tonight in a friend's range-rover which has been converted to also run on NG. The conversion took two days and about 2,000 UKP. It now has two tanks - one petrol and one NG. Switching between the two fuels is done by a button on the dashboard and can be done while the car is moving. Currently where I live petrol costs 0.84UKP/ltr and NG costs 0.39UKP/ltr. However NG is not as widely available. - you have to seek it out. I guess maybe 1/5th of filling stations have NG

$this->bbcode_second_pass_quote('Torjus', 'T')he Norway-UK pipeline was officially opened Monday to my recollection. I think it will be losing pressure quite rapidly (well, not in days or months, but years) as we are thinking of utilizing more of it at home.

Please do not utilise more of it at home because we need it in the UK thanks :)
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Re: Peak Oil v Peak Gas

Unread postby Micki » Mon 23 Oct 2006, 23:48:15

$this->bbcode_second_pass_quote('', 'P')lease do not utilise more of it at home because we need it in the UK thanks[spoil]
- Sorry the Australian gov is already giving grants for modifying the car from petrol to LPG


$this->bbcode_second_pass_quote('', ' ')
Currently where I live petrol costs 0.84UKP/ltr and NG costs 0.39UKP/ltr. However NG is not as widely available. - you have to seek it out. I guess maybe 1/5th of filling stations have NG

Question, do you get the same mileage out of 1L gas as 1L petrol?
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Re: Peak Oil v Peak Gas

Unread postby spot5050 » Tue 24 Oct 2006, 00:07:59

$this->bbcode_second_pass_quote('Micki', 'Q')uestion, do you get the same mileage out of 1L gas as 1L petrol?

Nearly but not quite, according to my friend who has been running one for a while.

Apparently it is slightly less - maybe 95/100ths.
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Re: Peak Oil v Peak Gas

Unread postby Laughs_Last » Tue 24 Oct 2006, 08:15:18

In regard to my writing “rapidly losing pressure”, I accept that this is a deceptively poor characterization. Mea Culpa. NG still isn’t going to do me any favours in North America. Given a sufficiently gradual increase in price, I hope that coal gas (town gas) will take up the slack at an affordable enough price for current heating uses. For a while.

And for Miki:
Liquid Fuel Energy Content (Wikipedia)
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Re: Peak Oil v Peak Gas

Unread postby peripato » Tue 24 Oct 2006, 08:58:06

I've read that Algeria and Nigeria are planning to build a 4500 mile natural gas pipeline linking Europe to ensure the continuation of overshoot.
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