Changes

In oil and gas industry, classifying carbonate rocks is a major step in core and thin section description. Two classification systems have been widely used in the industry:  

In oil and gas industry, classifying carbonate rocks is a major step in core and thin section description. Two classification systems have been widely used in the industry:  

# Folk (1959<ref name=Flk1959>Folk, R. L., 1959, [https://archives.datapages.com/data/bulletns/1957-60/data/pg/0043/0001/0000/0001.htm Practical petrographic classification of limestones]: AAPG Bulletin, v. 43, p. 1–38.</ref>, 1962<ref name=Flk1962>Folk, R.L., 1962, Spectral subdivision of limestone types, in Ham, W.E., ed., Classification of carbonate Rocks-A Symposium: American Association of Petroleum Geologists Memoir 1, p. 62-84.</ref>) Classification  

# Folk (1959<ref name=Flk1959>Folk, R. L., 1959, [https://archives.datapages.com/data/bulletns/1957-60/data/pg/0043/0001/0000/0001.htm Practical petrographic classification of limestones]: AAPG Bulletin, v. 43, p. 1–38.</ref>, 1962<ref name=Flk1962>Folk, R.L., 1962, Spectral subdivision of limestone types, in Ham, W.E., ed., Classification of carbonate Rocks-A Symposium: American Association of Petroleum Geologists Memoir 1, p. 62-84.</ref>) Classification  

# Dunham (1962) Classification  

# Dunham (1962<ref name=Dnhm>Dunham, R. J., 1962, Classification of carbonate rocks according to depositional texture, in Ham, W. E., ed., Classification of Carbonate Rocks: AAPG Memoir 1, p. 108–121.</ref>) Classification  

Both classifications provide an indication of depositional energy setting and reservoir quality.

Both classifications provide an indication of depositional energy setting and reservoir quality.

* Bramkamp & Powers (1958)

* Bramkamp & Powers (1958)

* Folk (1959<ref name=Flk1959 />,1962<ref name=Flk1962 />)

* Folk (1959<ref name=Flk1959 />,1962<ref name=Flk1962 />)

* Dunham (1962)

* Dunham (1962<ref name=Dnhm />)

* Leignton & Pendexter (1962)

* Leignton & Pendexter (1962)

* Todd (1966)

* Todd (1966)

* Wright (1992)

* Wright (1992)

* Hallsworth & Knox (1999)

* Hallsworth & Knox (1999)

Among all of the attempts, Folk (1959<ref name=Flk1959 />, 1962<ref name=Flk1962 />) and Dunham (1962) extended by Embry & Klovan (1971) classifications were widely accepted.  

Among all of the attempts, Folk (1959<ref name=Flk1959 />, 1962<ref name=Flk1962 />) and Dunham (1962<ref name=Dnhm />) extended by Embry & Klovan (1971) classifications were widely accepted.  

==Folk Classification==  

==Folk Classification==  

1. Lokier, Stephen W.; Al Junaibi, Mariam (2016). "The petrographic description of carbonate facies: are we all speaking the same language?". Sedimentology. 63 (7): 1843–1885. doi:10.1111/sed.12293

1. Lokier, Stephen W.; Al Junaibi, Mariam (2016). "The petrographic description of carbonate facies: are we all speaking the same language?". Sedimentology. 63 (7): 1843–1885. doi:10.1111/sed.12293

4. Dunham, R. J., 1962, Classification of carbonate rocks according to depositional texture, in Ham, W. E., ed., Classification of Carbonate Rocks: AAPG Memoir 1, p. 108–121.

4.

5. Embry, Ashton F.; Klovan, J. Edward (1971-12-01). "A late Devonian reef tract on northeastern Banks Island, N.W.T". Bulletin of Canadian Petroleum Geology. 19 (4): 730–781.

5. Embry, Ashton F.; Klovan, J. Edward (1971-12-01). "A late Devonian reef tract on northeastern Banks Island, N.W.T". Bulletin of Canadian Petroleum Geology. 19 (4): 730–781.

6. K. Bjørlykke (ed). Petroleum Geoscience: From Sedimentary Environments to Rock Physics, DOI 10.1007/978-3-642-34132-8_5, Ⓒ Springer-Verlag Berlin Heidelberg 2015.

6. K. Bjørlykke (ed). Petroleum Geoscience: From Sedimentary Environments to Rock Physics, DOI 10.1007/978-3-642-34132-8_5, Ⓒ Springer-Verlag Berlin Heidelberg 2015.