Reserve vs occurrence - Revision history

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energy>Jmdonev at 23:48, 9 November 2021

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	<onlyinclude>Both the terms '''occurrence''' and '''reserve''' refer to some ''amount'' of a [[resource]], however, the ideas are fundamentally different. Primary fuels such as [[coal]], [[oil]], [[natural gas]], and [[uranium]] are materials that occur on the Earth, and have associated occurrences and [[reserve]]s.</onlyinclude> ~~However,~~ [[~~flow~~]]s in nature like wind, solar and hydro ''only'' have associated occurrences, and no reserves as there is no "stockpile" ~~of them~~. ~~Generally~~, the term reserve ~~usually~~ refers to [[fossil fuel]] reserves.		[[es:Reserva vs ocurrencia]]
			<onlyinclude>Both the terms '''occurrence''' and '''reserve''' refer to some ''amount'' of a [[resource]], however, the ideas are fundamentally different. Primary fuels such as [[coal]], [[oil]], [[natural gas]], and [[uranium]] are materials that occur on the Earth, and have associated occurrences (all that exists) and [[reserve]]s (the amount that can be economically extracted).</onlyinclude> [[Flow]]s in nature like wind, solar and hydro ''only'' have associated occurrences, and no reserves as there is no "[[stockpile]]". Usually, the term '''reserve''' refers to [[fossil fuel]] reserves - the amount of a particular fossil fuel that we know about that can be extracted from nature with current technology at current prices.

	The term occurrence refers to any presence of a resource that exists. The '''total occurrence''' is all of the resource in nature. An energy flow's total occurrence is any instance the flow is able to be used at any given moment. The total wind occurrence is all of the wind that's blowing, whether it's useful or not. For fuels, the total occurrence includes the discovered and undiscovered deposits, economically recoverable or not ~~economically recoverable~~. For coal, total occurrence refers to every deposit of coal in the world, regardless of whether or not it will ever be useful.		The term '''occurrence''' refers to any presence of a resource that exists. The '''total occurrence''' is all of the resource in nature. An energy flow's total occurrence is any instance the flow is able to be used at any given moment. The total wind occurrence is all of the wind that's blowing, whether it's useful to generate energy or not. For fuels, the total occurrence includes the discovered and undiscovered deposits, in addition deposits which are economically recoverable or not. For coal, the total occurrence refers to every deposit of coal in the world, regardless of whether or not it will ever be useful to the energy industry.

	On the other hand, [[reserve]]s are deposits of fossil fuels that are known to exist with a reasonable level of certainty based on geological and engineering studies. These reserves are also recoverable economically with the technologies that ~~already~~ exist.<ref name=wolfson>Richard Wolfson. (June 2, 2015). ''Energy, Environment, and Climate'', 2nd ed. New York, NY, U.S.A: 2012.</ref> This means that the amount of fossil fuel in a reserve will always be less than the total occurrence of the fossil fuel. Essentially, reserves represent the current amount of fuel that ''can'' be extracted in the near future.		On the other hand, [[reserve]]s are deposits of fossil fuels that are known to exist with a reasonable level of certainty based on geological and engineering studies. These reserves are also recoverable economically with the technologies that currently exist.<ref name=wolfson>Richard Wolfson. (June 2, 2015). ''Energy, Environment, and Climate'', 2nd ed. New York, NY, U.S.A: 2012.</ref> This means that the amount of fossil fuel in a reserve will always be less than the total occurrence of the fossil fuel. Essentially, reserves represent the current amount of fuel that ''can'' be extracted in the near future.

			The difference between an occurrence and a reserve can be explored using a [[McKelvey box\|McKelvey diagram]]. A simple adaption of the McKelvey box is seen in Figure 1, and it portrays information about how a resource can be classified. The entire box represents the resource's occurrence and within it are various categories. Moving from left to right means the certainty of existence for an occurrence decreases. Moving from the top to bottom represents the decrease in economic feasibility (usually when prices for a a fuel goes down). The bottom left corner (conditional resources) represents resources that aren't economically feasible to extract, but are known to exist to a fairly high certainty. The right side (hypothetical/undiscovered resources) represent ones that aren't known to exist (and therefore can't be economically feasible)! Lastly, the top, left corner represents the reserve. A true Mckelvey box will go more in depth on the varying certainties of a reserve (known as the 3 P's of reserves), which can be explored on its main page, [[McKelvey diagram\|here]].


			<center>'''reserves + conditional resources + hypothetical resources = occurrence'''</center>

	[[File:occur vs resv.png\|600px\|thumb\|center\|Figure 1. All reserves are part of the total occurrence, not all occurrences of resources are known reserves that can be mined—or economically feasible. <ref>''Created internally by a member of the Energy Education team''.</ref>]]		[[File:occur vs resv.png\|600px\|thumb\|center\|Figure 1. All reserves are part of the total occurrence, not all occurrences of resources are known reserves that can be mined—or economically feasible. <ref>''Created internally by a member of the Energy Education team''.</ref>]]

	Since occurrences include undiscovered fuel deposits, there is a varying level of uncertainty on the quantity of a resource, while the size of reserves can be estimated to a fairly certain degree.<ref name=wolfson/> This does not mean that there is no way to estimate the size of these occurrences~~, the~~ total amount of a resource can be described and estimated based on information obtained from surveys.<ref>Sarah Friedl. (May 29, 2015). Resources and Reserves: Definitions and Examples [Online]. Available: http://study.com/academy/lesson/resource-energy-vs-reserve-energy.html</ref>		Since occurrences include undiscovered fuel deposits, there is a varying level of uncertainty on the quantity of a resource's occurrence, while the size of reserves can be estimated to a fairly certain degree.<ref name=wolfson/> This does not mean that there is no way to estimate the size of these occurrences. The total amount of a resource can be described and estimated based on information obtained from surveys.<ref>Sarah Friedl. (May 29, 2015). Resources and Reserves: Definitions and Examples [Online]. Available: http://study.com/academy/lesson/resource-energy-vs-reserve-energy.html</ref>

	The difference between an occurrence and a reserve can be explored using a [[McKelvey box\|McKelvey diagram]]. A simple adaption of the McKelvey box is seen in Figure 1, and it portrays information about how a resource can be classified. The entire box represents the resource's occurrence and within it are various categories. Moving from left to right means the certainty of existence for an occurrence decreases. Moving from the top to bottom represents the decrease in economic feasibility (usually when prices for a a fuel goes down). The bottom left corner (conditional resources) represents resources that aren't economically feasible to extract, but are known to exist to a fairly high certainty. The right side (hypothetical/undiscovered resources) represent ones that aren't known to exist (and therefore can't be economically feasible!) Lastly, the top, left corner represents the reserve. A true Mckelvey box will go more in depth on the varying certainties of a reserve (known as the 3 P's of reserves), which can be explored on its main page, [[McKelvey diagram\|here]].

	It's important to recognize that when reserves go up (~~and they do! See~~ the [[reserve]] page) that's because of improved technology, higher prices (better for the economy) or newly found deposits ~~are making a portion of the resource's total occurrence possible and economical to mine~~.		It's important to recognize that when reserves go up (see the [[reserve]] page) that's because of improved technology, higher prices (better for the economy) or newly found deposits.

	<html>		<html>
	<iframe width="560" height="315" src="https://www.youtube.com/embed/h34qAbmfVN0" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>		<center><iframe width="560" height="315" src="https://www.youtube.com/embed/h34qAbmfVN0" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
	</html>		</center></html>
	==For Further Reading==		==For Further Reading==
	*[[Reserve]]		*[[Reserve]]

Jmdonev at 22:32, 24 February 2019

2019-02-24T22:32:36Z

← Older revision		Revision as of 22:32, 24 February 2019
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	It's important to recognize that when reserves go up (and they do! See the [[reserve]] page) that's because of improved technology, higher prices (better for the economy) or newly found deposits are making a portion of the resource's total occurrence possible and economical to mine.		It's important to recognize that when reserves go up (and they do! See the [[reserve]] page) that's because of improved technology, higher prices (better for the economy) or newly found deposits are making a portion of the resource's total occurrence possible and economical to mine.

			<html>
			<iframe width="560" height="315" src="https://www.youtube.com/embed/h34qAbmfVN0" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
			</html>
	==For Further Reading==		==For Further Reading==
	*[[Reserve]]		*[[Reserve]]

Jmdonev: 1 revision imported

2019-02-24T22:19:55Z

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2dev>Jmdonev: Removed redirect to Reserve vs resource occurrence

2019-02-24T21:56:39Z

Removed redirect to Reserve vs resource occurrence

New page

[[category:371 topics]]
[[Category:Done 2019-02-17]]
[[category: Feb emergency upload]]
<onlyinclude>Both the terms '''occurrence''' and '''reserve''' refer to some ''amount'' of a [[resource]], however, the ideas are fundamentally different. Primary fuels such as [[coal]], [[oil]], [[natural gas]], and [[uranium]] are materials that occur on the Earth, and have associated occurrences and [[reserve]]s.</onlyinclude> However, [[flow]]s in nature like wind, solar and hydro ''only'' have associated occurrences, and no reserves as there is no "stockpile" of them. Generally, the term reserve usually refers to [[fossil fuel]] reserves.

The term occurrence refers to any presence of a resource that exists. The '''total occurrence''' is all of the resource in nature. An energy flow's total occurrence is any instance the flow is able to be used at any given moment. The total wind occurrence is all of the wind that's blowing, whether it's useful or not. For fuels, the total occurrence includes the discovered and undiscovered deposits, economically recoverable or not economically recoverable. For coal, total occurrence refers to every deposit of coal in the world, regardless of whether or not it will ever be useful.

On the other hand, [[reserve]]s are deposits of fossil fuels that are known to exist with a reasonable level of certainty based on geological and engineering studies. These reserves are also recoverable economically with the technologies that already exist.<ref name=wolfson>Richard Wolfson. (June 2, 2015). ''Energy, Environment, and Climate'', 2nd ed. New York, NY, U.S.A: 2012.</ref> This means that the amount of fossil fuel in a reserve will always be less than the total occurrence of the fossil fuel. Essentially, reserves represent the current amount of fuel that ''can'' be extracted in the near future.

[[File:occur vs resv.png|600px|thumb|center|Figure 1. All reserves are part of the total occurrence, not all occurrences of resources are known reserves that can be mined—or economically feasible. <ref>''Created internally by a member of the Energy Education team''.</ref>]]

Since occurrences include undiscovered fuel deposits, there is a varying level of uncertainty on the quantity of a resource, while the size of reserves can be estimated to a fairly certain degree.<ref name=wolfson/> This does not mean that there is no way to estimate the size of these occurrences, the total amount of a resource can be described and estimated based on information obtained from surveys.<ref>Sarah Friedl. (May 29, 2015). Resources and Reserves: Definitions and Examples [Online]. Available: http://study.com/academy/lesson/resource-energy-vs-reserve-energy.html</ref>

The difference between an occurrence and a reserve can be explored using a [[McKelvey box|McKelvey diagram]]. A simple adaption of the McKelvey box is seen in Figure 1, and it portrays information about how a resource can be classified. The entire box represents the resource's occurrence and within it are various categories. Moving from left to right means the certainty of existence for an occurrence decreases. Moving from the top to bottom represents the decrease in economic feasibility (usually when prices for a a fuel goes down). The bottom left corner (conditional resources) represents resources that aren't economically feasible to extract, but are known to exist to a fairly high certainty. The right side (hypothetical/undiscovered resources) represent ones that aren't known to exist (and therefore can't be economically feasible!) Lastly, the top, left corner represents the reserve. A true Mckelvey box will go more in depth on the varying certainties of a reserve (known as the 3 P's of reserves), which can be explored on its main page, [[McKelvey diagram|here]].

It's important to recognize that when reserves go up (and they do! See the [[reserve]] page) that's because of improved technology, higher prices (better for the economy) or newly found deposits are making a portion of the resource's total occurrence possible and economical to mine.

==For Further Reading==
*[[Reserve]]
*[[Resource]]
*[[Reserves/production ratio]]
*[[Oil reserve]]
*[[Natural gas reserve]]
*[[Coal reserve]]
*Or explore a [[Special:Random|random page]]

==References==
{{reflist}}
[[Category:Uploaded]]