1,705
edits
Changes
Jump to navigation
Jump to search
Kerogen type and quality: visual assessment (view source)
Revision as of 13:38, 24 January 2014
, 13:38, 24 January 2014Initial import
{{publication
| image = exploring-for-oil-and-gas-traps.png
| width = 120px
| series = Treatise in Petroleum Geology
| title = Exploring for Oil and Gas Traps
| part = Critical elements of the petroleum system
| chapter = Evaluating source rocks
| frompg = 6-1
| topg = 6-41
| author = Carol A. Law
| link = http://archives.datapages.com/data/specpubs/beaumont/ch06/ch06.htm
| pdf =
| store = http://store.aapg.org/detail.aspx?id=545
| isbn = 0-89181-602-X
}}
==The method==
To assess kerogen quality visually, we can separate it from the mineral matrix through acidification. We can then examine the kerogen using transmitted light through a microscope to determine its form (structured or amorphous) and origin. Structured kerogens include woody, herbaceous, vitrinite, and inertinite. Amorphous kerogens are by far the most prevalent and include most of the algal material.
Visual kerogen estimates are usually presented in terms of the percentage of each type of kerogen in a sample derived from cuttings composites or core (conventional or sidewall). For example, a visual estimate of kerogen type might be stated as 50% woody, 45% amorphous, 5% inertinite. In general, the more amorphous kerogen present, the more oil prone the rock is.
==Visual kerogen types and quality==
Visual kerogen types and quality are shown in the table below.
{| class = "wikitable"
|-
! Visual kerogen type
! Hydrocarbon potential
|-
| Woody
| Gas prone
|-
| Herbaceous
| Oil and gas prone
|-
| Vitrinite
| Gas prone
|-
| Inertinite
| No potential
|-
| Amorphous (dominantly algal)
| Oil and gas prone
|}
==See also==
* [[Evaluating source rock quality]]
* [[Kerogen types]]
* [[Evaluating quality using rock-eval HI/OI]]
* [[Using pyrolysis gas chromatography to assess quality]]
==External links==
{{search}}
* [http://archives.datapages.com/data/specpubs/beaumont/ch06/ch06.htm Original content in Datapages]
* [http://store.aapg.org/detail.aspx?id=545 Find the book in the AAPG Store]
[[Category:Critical elements of the petroleum system]]
[[Category:Evaluating source rocks]]
| image = exploring-for-oil-and-gas-traps.png
| width = 120px
| series = Treatise in Petroleum Geology
| title = Exploring for Oil and Gas Traps
| part = Critical elements of the petroleum system
| chapter = Evaluating source rocks
| frompg = 6-1
| topg = 6-41
| author = Carol A. Law
| link = http://archives.datapages.com/data/specpubs/beaumont/ch06/ch06.htm
| pdf =
| store = http://store.aapg.org/detail.aspx?id=545
| isbn = 0-89181-602-X
}}
==The method==
To assess kerogen quality visually, we can separate it from the mineral matrix through acidification. We can then examine the kerogen using transmitted light through a microscope to determine its form (structured or amorphous) and origin. Structured kerogens include woody, herbaceous, vitrinite, and inertinite. Amorphous kerogens are by far the most prevalent and include most of the algal material.
Visual kerogen estimates are usually presented in terms of the percentage of each type of kerogen in a sample derived from cuttings composites or core (conventional or sidewall). For example, a visual estimate of kerogen type might be stated as 50% woody, 45% amorphous, 5% inertinite. In general, the more amorphous kerogen present, the more oil prone the rock is.
==Visual kerogen types and quality==
Visual kerogen types and quality are shown in the table below.
{| class = "wikitable"
|-
! Visual kerogen type
! Hydrocarbon potential
|-
| Woody
| Gas prone
|-
| Herbaceous
| Oil and gas prone
|-
| Vitrinite
| Gas prone
|-
| Inertinite
| No potential
|-
| Amorphous (dominantly algal)
| Oil and gas prone
|}
==See also==
* [[Evaluating source rock quality]]
* [[Kerogen types]]
* [[Evaluating quality using rock-eval HI/OI]]
* [[Using pyrolysis gas chromatography to assess quality]]
==External links==
{{search}}
* [http://archives.datapages.com/data/specpubs/beaumont/ch06/ch06.htm Original content in Datapages]
* [http://store.aapg.org/detail.aspx?id=545 Find the book in the AAPG Store]
[[Category:Critical elements of the petroleum system]]
[[Category:Evaluating source rocks]]