pstarr wrote:Debating with optomist is a unqiue experience. It gets shriller and then he disappears for a while soon to return with more company press releases. You have to wonder how and where he sourced them.
Antimatter wrote:go5star,
What do you think of Shell's project, compared with your process, which uses coal gasification for heat to cook the shale and power on the side if I recall correctly. What sort of energy return are you expecting, keeping in mind that the shale has to be mined if not done in-situ?
Lehyina wrote:Shell's ingenious approach to oil shale is pretty slickOn one small test plot about 20 feet by 35 feet, on land Shell owns, they started heating the rock in early 2004. "Product" - about one-third natural gas, two-thirds light crude - began to appear in September 2004. They turned the heaters off about a month ago, after harvesting about 1,500 barrels of oil.
While we were trying to do the math, O'Connor told us the answers. Upwards of a million barrels an acre, a billion barrels a square mile. And the oil shale formation in the Green River Basin, most of which is in Colorado, covers more than a thousand square miles - the largest fossil fuel deposits in the world.
Wow.
This article gives the casual reader the idea that there is 1000 Giga barrels of oil to be had from Shell's new shale technology. But if the stated recovery data is accurate and one does one's own arithmetic based on 1500 bbls recovered from a plot of land 20 by 35 feet (i.e 700 square feet) one gets 93,000 bbls per acre , 60 million barrels per square mile and 60 Giga barrels per thousand square miles. Now that's a goodly amount of oil (especially for Shell Oil' share holders) but it falls a bit short of the Wow and promise (1000 Giga barrels) implied by the article. There is an apparent factor of 16 discrepancy here. If my own arithmetic is wrong someone please correct me?
sicophiliac wrote:So Go5star, its not really a new way of extracting the oil shale itself, but rather a creative and environmentally friendly way of using surplus energy that normally wouldnt be utalized during coal gasification to extract the oil shale correct? Isnt that pretty similiar to what Shell is doing ? I dont quite understand all together how and why they freeze the shale for extract other then its got to do with ground water contamination or something. Perhaps you could explain that a bit too.
So far I like what I am hearing... this is good for America.. very good for America economically anyways.
sicophiliac wrote:Being an ex-situ process wouldnt that limit the maximum amount of potentially extractable oil to only whats with in a few meters of ground level? How would you be able to heat the shale thousands of feet down with out using huge huge amounts of energy?
go5star wrote:sicophiliac wrote:Being an ex-situ process wouldnt that limit the maximum amount of potentially extractable oil to only whats with in a few meters of ground level? How would you be able to heat the shale thousands of feet down with out using huge huge amounts of energy?
We mine our shale, crush it and send it through a rotary kiln with the inert syngas. Shell has to heat it in the ground up to a 1000 feet down.
sicophiliac wrote:So Go5star, its not really a new way of extracting the oil shale itself, but rather a creative and environmentally friendly way of using surplus energy that normally wouldnt be utalized during coal gasification to extract the oil shale correct? Isnt that pretty similiar to what Shell is doing ? I dont quite understand all together how and why they freeze the shale for extract other then its got to do with ground water contamination or something. Perhaps you could explain that a bit too.
So far I like what I am hearing... this is good for America.. very good for America economically anyways.
sicophiliac wrote:go5star wrote:sicophiliac wrote:Being an ex-situ process wouldnt that limit the maximum amount of potentially extractable oil to only whats with in a few meters of ground level? How would you be able to heat the shale thousands of feet down with out using huge huge amounts of energy?
We mine our shale, crush it and send it through a rotary kiln with the inert syngas. Shell has to heat it in the ground up to a 1000 feet down.
Ah I see, isnt that pretty much what they tried in the early 80s but using natural gas instead as a power source? I take it you know your stuff and from what you say your method seems to be alot more viable then that was. By the way how many billions of barrels of oil do you believe can be recovered through this method in total ? I have heard figures from like 500 billion barrels to something like 1.9 trillion barrels of oil can be had from the oil shale in that area.
go5star wrote:sicophiliac wrote:go5star wrote:sicophiliac wrote:Being an ex-situ process wouldnt that limit the maximum amount of potentially extractable oil to only whats with in a few meters of ground level? How would you be able to heat the shale thousands of feet down with out using huge huge amounts of energy?
We mine our shale, crush it and send it through a rotary kiln with the inert syngas. Shell has to heat it in the ground up to a 1000 feet down.
Ah I see, isnt that pretty much what they tried in the early 80s but using natural gas instead as a power source? I take it you know your stuff and from what you say your method seems to be alot more viable then that was. By the way how many billions of barrels of oil do you believe can be recovered through this method in total ? I have heard figures from like 500 billion barrels to something like 1.9 trillion barrels of oil can be had from the oil shale in that area.
Actually its not natural gas, its syngas from the coal gasification process that we use. The old methods used shale for the heat source. As far as recoverable reserves, we are sticking with the 1 trillion barrel figure to be conservative. We have actually talked to people within the DOE who have suggested as much as 4 trillion barrels lies within the Utah/Wyoming/Colorado fields. Our process only scales up to 60,000 barrels a day maximum per plant assuming we burn our syngas in the last stage as electricity. If we apply a Fisher-Tropsch process to convert the syngas instead of burning it for electricity we can produce another 30,000 barrels of liquid product. That is still a drop in the bucket to our daily consumption. As you can see many plants would be needed to really put a dent in the nations needs.
wildsparrow wrote:sicophiliac wrote:So Go5star, its not really a new way of extracting the oil shale itself, but rather a creative and environmentally friendly way of using surplus energy that normally wouldnt be utalized during coal gasification to extract the oil shale correct? Isnt that pretty similiar to what Shell is doing ? I dont quite understand all together how and why they freeze the shale for extract other then its got to do with ground water contamination or something. Perhaps you could explain that a bit too.
So far I like what I am hearing... this is good for America.. very good for America economically anyways.
I guess you are not of the school that believe that in order for humanity to survive, the market economy / capitalism / consumerism ... must die. If getting oil from shale means flogging the horse for a bit longer before it dies on its feet, then, no thankyou. Don't mine the bloody stuff if it means keeping everyone in an oil-induced stupor for a bit longer. It's only useful if it facilitates a massive change of society IMO.
Chances of that happening? Anyone?
EnergySpin wrote:go5star wrote:sicophiliac wrote:go5star wrote:sicophiliac wrote:Being an ex-situ process wouldnt that limit the maximum amount of potentially extractable oil to only whats with in a few meters of ground level? How would you be able to heat the shale thousands of feet down with out using huge huge amounts of energy?
We mine our shale, crush it and send it through a rotary kiln with the inert syngas. Shell has to heat it in the ground up to a 1000 feet down.
Ah I see, isnt that pretty much what they tried in the early 80s but using natural gas instead as a power source? I take it you know your stuff and from what you say your method seems to be alot more viable then that was. By the way how many billions of barrels of oil do you believe can be recovered through this method in total ? I have heard figures from like 500 billion barrels to something like 1.9 trillion barrels of oil can be had from the oil shale in that area.
Actually its not natural gas, its syngas from the coal gasification process that we use. The old methods used shale for the heat source. As far as recoverable reserves, we are sticking with the 1 trillion barrel figure to be conservative. We have actually talked to people within the DOE who have suggested as much as 4 trillion barrels lies within the Utah/Wyoming/Colorado fields. Our process only scales up to 60,000 barrels a day maximum per plant assuming we burn our syngas in the last stage as electricity. If we apply a Fisher-Tropsch process to convert the syngas instead of burning it for electricity we can produce another 30,000 barrels of liquid product. That is still a drop in the bucket to our daily consumption. As you can see many plants would be needed to really put a dent in the nations needs.
But what are guys going to do with the CO2 released? Do you have any estimates of the carbon budget of this whole deal? My understanding is that NG burns cleaner than coal (including gasified coal) so you will end up pumping more CO2 up there OR that your requirements for carbon sequestration will be higher.
If you see my earlier posts you will see that we are not burning coal. We are using coal gasification. It is completely different and it allows us to capture nearly all of the CO2 that we plan to sequester and sell it to low or non producing oil wells in Utah/Wyoming/Colorado. If and when the oil wells run out of sequestration capacity, there are millions of acres of non-minable coal beds in which we can sequester the gas.
Antimatter wrote:If I am understanding correctly the heat provided by partial oxidation of the coal to form syngas provides enough heat to cook the kerogen out of the shale? Hence by running the syngas through a combined cycle gas turbine power could be generated more efficiently than current coal plants, whilst producing oil from shale on the side? If so it could be very usefull.
Antimatter wrote:If you see my earlier posts you will see that we are not burning coal. We are using coal gasification. It is completely different and it allows us to capture nearly all of the CO2 that we plan to sequester and sell it to low or non producing oil wells in Utah/Wyoming/Colorado. If and when the oil wells run out of sequestration capacity, there are millions of acres of non-minable coal beds in which we can sequester the gas.
Also for complete carbon sequestation I beleive it is necessary to use a) oxygen blown gasification and b) a water gas shift stage to convert the CO and H2 syngas stream to CO2 and H2 and feed the relativly pure H2 to the turbine, which will add to capital costs. However again if I'm understanding correctly, the carbon budget for the whole deal even without sequestation should be about the same or slightly less than current coal fired power and oil per unit of product?
Thanks for the time.
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