Alfred Tennyson wrote:We are not now that strength which in old days
Moved earth and heaven, that which we are, we are;
One equal temper of heroic hearts,
Made weak by time and fate, but strong in will
To strive, to seek, to find, and not to yield.
An oil field co-produced resource makes use of wells already drilled by the oil and gas industry that are either deep enough to encounter hot water, or could be deepened into these hot zones. The company notes that a depth of 15,000 ft or more is preferred where pressures will be optimal. It also quotes scientists at Southern Methodist University as saying that producing energy from oil and gas fields in Texas alone could result in between 400 and 2200 MW of geothermal power.
The project now being implemented calls for developing a total of 200 geopressured wells – double the number from the original joint venture announcement – in Mississippi and Texas. The project is expected to ultimately generate baseload electrical power of at least 400 MW at a capital cost estimated at $280 million.
Abstract
Development of the current approach to carbon capture and sequestration from coal-fired power plants has several technical, environmental and economic constraints. Production of brine while storing CO2 in the aquifer greatly mitigates some of the technical and environmental difficulties. In the case of geopressured-geothermal aquifers, brine production can yield methane and geothermal energy that exceeds the energy required for the capture and storage process. A reservoir simulation study was performed on a simple geopressured-geothermal aquifer model to investigate the amount of produced energy versus amount of stored CO2. The power requirements for CO2 capture and pressurization of injected CO2 and brine were compared to the power that could be achieved from produced energy.
JLK wrote:As Julian Darley described so well in his recent book High Noon For Natural Gas, North America is now in the early stages of a continent-wide natural gas supply crisis.
pstarr wrote:The point being your post is a distraction not remotely about the specific topic thread.John_A wrote:JLK wrote:As Julian Darley described so well in his recent book High Noon For Natural Gas, North America is now in the early stages of a continent-wide natural gas supply crisis.
Yes, the crisis was pretty bad wasn't it? New supplies brought online so hard it crashed the price, coal fired power plants being decommissioned to take advantage of the abundance, and folks even investing 100's of millions to take advantage of the BTU value spread between natural gas and crude.
http://pintogtl.com/pinto-energy-announ ... ids-plant/
Sometimes these old threads make the point so well...I almost don't even have to post!!
(As an aside (and Mods, pops, I promise I won't pursue this) isn't $6/mcf tight-shale NG difficult to sell into a $4 market?)
ROCKMAN wrote:sub - The high pressure part of "geopressure" is the pressure in the reservoir...not when it gets to the surface. It might be 15,000 psi at 16,000' but by the time it gets to the surface the FTP (flowing tubing pressure) might just be 2,000 psi...or a lot less. That may still sound like a lot of pressure but remember now you're moving 10k to 20k bbls of water through the production equipment...that takes a lot of horse power. And then what do you do with all that nasty salt water? You pump it down deep and expensive disposal wells...and that takes more horse power.
Alfred Tennyson wrote:We are not now that strength which in old days
Moved earth and heaven, that which we are, we are;
One equal temper of heroic hearts,
Made weak by time and fate, but strong in will
To strive, to seek, to find, and not to yield.
ROCKMAN wrote:sub - The high pressure part of "geopressure" is the pressure in the reservoir...not when it gets to the surface. It might be 15,000 psi at 16,000' but by the time it gets to the surface the FTP (flowing tubing pressure) might just be 2,000 psi...or a lot less. That may still sound like a lot of pressure but remember now you're moving 10k to 20k bbls of water through the production equipment...that takes a lot of horse power. And then what do you do with all that nasty salt water? You pump it down deep and expensive disposal wells...and that takes more horse power.
So far the more economical geothermal projects I've seen described involve wells just a few hundred feet deep. Granted not a lot of heat content but a great deal cheaper per BTU. No methane but then no 100's of millions of bbls of salt water to deal with either. In the oil patch salt water disposal is huge black hole that capex goes in to never be seen again. LOL.
ROCKMAN wrote:T – Out in the open GOM you can go overboard directly with your produce water once you clean out the oil to the max level allowed by the feds…which is very, very little. Used to be able to dump into state waters right along the coast but I think the states have stopped that.
With respect to oil, once you’ve already paid for the SWD (salt water disposal) well it isn’t that expensive. But getting to that point is. With the current high oil price I see companies making a nice avenue (granted by Mom & Pop company standards) producing 3 bopd and 300 bwpd. With the current low price of NG…not so easy.
Dumping into the Miss. River would upset the folks in my hometown…Nawlins. They have enough trouble with salt water flowing upstream during low flow periods on the Miss. R. You need to understand that the bottom of the MR at Nawlins is way below sea level so a wedge of salt water can make it up to the water plants. And remember what I’ve said a about the regs in La.: if I’m drilling in a designated ‘wetlands’ area I can’t pump rain water off my drill site. I have to truck it to a disposal company. You dump salt water on the ground in Texas or La and get caught you’re in for a world of hurt.
BTW: common sign in bathrooms in Baton Rouge: Please flush the toilet…New Orleans needs drinking water.
Alfred Tennyson wrote:We are not now that strength which in old days
Moved earth and heaven, that which we are, we are;
One equal temper of heroic hearts,
Made weak by time and fate, but strong in will
To strive, to seek, to find, and not to yield.
PrestonSturges wrote:I always wondered about Hawaii - they have active volcanoes of the well behaved variety and should have no trouble tapping geothermal energy only a couple hundred feet down, with the whole Pacific Ocean to use as a heat sink, but they are burning diesel to generate electricity.
Alfred Tennyson wrote:We are not now that strength which in old days
Moved earth and heaven, that which we are, we are;
One equal temper of heroic hearts,
Made weak by time and fate, but strong in will
To strive, to seek, to find, and not to yield.
.....It is the biggest mud volcano in the world; responsibility for it was credited to the blowout of a natural gas well, although some scientists[2] and company officials contend it was caused by a distant earthquake.
ROCKMAN wrote:T – I think you and many others greatly underestimate how state govts protect the environment. I’ve dealt with the feds, Texas and La on environmental issues for almost 40 years. The protection provided by the feds and their EPA is a joke compared how those state govts handle the environment. With the exception of dealing with the Corps of Engineers in some isolated instances in La. I don’t deal with the EPA ever...and never have. The fed govt doesn’t even have a clue what I’m doing operationally in either state. But the state regulators know exactly what I’m doing all the time. If the people of either state had depended upon the feds to protect the environment it might just be one wide patch of wasteland today.
I drilled wells in KY where the state had given 100% of oil field related environmental protection to the EPA. As best I could tell the EPA did not have a single person on the ground in KY watching over oil/NG drilling and production. But they were watching us from afar: I filed my paperwork with the EPA office in Atlanta. So all they knew was that I reported I never dumped salt water into a creek instead of properly disposing it. I could have dumped thousands of bbls of salt water into the creek and they wouldn’t have a clue.
And even when the states are in charge it doesn’t mean they are doing a good job. Remember what I reported a long time ago: much (if not most) of the frac fluid contamination in PA was coming from local community water treatment facilities that were charging companies to dispose of their frac fluids with them and then they would release is after it went through their systems (which had little or no capability of treating the frac fluids) into the streams. Both NY and PA had to pass laws to make it illegal for municipalities to continue to do this. Bet you didn’t see much in the MSM about this, eh? LOL. Like the guy in Illinois that was dumping oil field waste for years into the sewer system instead of properly disposing it. And did the EPA or local govt discover his crime? No…it was one of the oil patch companies that was paying him to get rid of their crap that ratted him out. Bet you didn’t see that part of the story on CNN. LOL.
Alfred Tennyson wrote:We are not now that strength which in old days
Moved earth and heaven, that which we are, we are;
One equal temper of heroic hearts,
Made weak by time and fate, but strong in will
To strive, to seek, to find, and not to yield.
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