Characteristic of petrology and distribution of larger benthic foraminifera of permian carbonate in the southern part of Block 106, Song Hong basin
Abstract
The paper presents a detailed stratigraphic study of some wells which drilled through carbonate basement formations by analising larger benthic foraminifera assemblages and lithological characteristics of carbonate rock. The results show that the limestone formations are mainly packstone, wackestone and mudstone which contain abundant fossilised coincidence characteristic for the Permian period (Wuchiapingian - Changhsingian). The petrographic composition of the rock has been less altered so most of the fossil traces are quite well preserved, in which the fossil frames were replaced by calcite and dolimite cement. The pores are formed mainly by the compression of the blocky carbonate basements and they are filled by calcite, dolomite and silicon due to the influence of magma and hydrothermal activities.
References
2. Nguyễn Thị Dậu và nnk. Đánh giá tiềm năng bể Sông Hồng thuộc Dự án: “Đánh giá tiềm năng dầu khí trên vùng biển và thềm lục địa Việt Nam. Tập đoàn Dầu khí Việt Nam. 2012.
3. L.H.Nielsen, H.I.Petersen, N.D.Thai, N.A.Duc,M.B.W.Fyhn, L.O.Boldreel, H.A.Tuan, S.Lindström, L.V.Hien. A Middle-Upper Miocene fluvial-lacustrine rift sequence in the Song Ba rift, Vietnam: An analogue to oil-prone, smallscale continental rift basins. Petroleum Geoscience. 2007; 13: p. 145 - 168.
4. Đặng Trần Huyên. Địa tầng các trầm tích Phanerozoi ở Đông Bắc Bộ. Viện Khoa học Địa chất và Khoáng sản. 2007.
5. Đoàn Nhật Trưởng. Atlas cổ sinh vật Việt Nam (Tập Trùng lỗ). Viện Khoa học Địa chất và Khoáng sản. 2012.
6. Daniel Vachard. New SEM obdervations of Keriothecal walls: Implications for the evolution of Fusulinid. Journal of Foraminiferal Research. 2004; 34(3): p. 232 - 242.
7. Alfred R.Loeblich, Helen Tappan. Foraminifera genera and their classification. Journal of Foraminiferal Research. 1988; 18(3): p. 271 - 274.
8. J.R.Groves. Suborder Lagenide and other smaller foraminifers form uppermost Pennysylvanian-lower Permi rocks of Kansas and Oklahoma. Micropaleontology. 2000; 46(4): p. 285 - 326.
9. Haijun Song, Jin-Nan Tong, Ke-Xin Zhang, Qin-Xian Wang, ZHong-Qiang Chen. Foraminiferal survivors from the Permian-Triassic mass extinction in the Meishan section, South China. Palaeoworld. 2007; 16: p. 105 - 119.
10. Jérémie Gaillot, Daniel Vachart, Thomas Galfetti, Rossana Martini. New latest Permian foraminifers from Laren (Guangxi Province, South China): Palaeobiogeographic implications. Geobios. 2009; 42(2): p. 141 - 168.
11. ZHong-Qiang Chen, Annette D.George, W-R. Yang. Effects of Middle-Late Permian sea-level changes and mass extinction on the formation of the Tieqiao skeletal mound in the Laibin area, South China. Australian Journal of Earth Sciences. 2009; 56(6): p. 745 - 763.
12. Hamed Yarahmadzahi, Daniel Vachard, Bahareh. Dibadin. Smaller foraminifers from the lower permian emarat formation, east of Firuzkuh (Central Alborz, Iran). Research in Paleontology and Stratigraphy. 2016; 122(3): p. 103 - 118.
13. Ursula Leppig. Codonofusiella (Fusulinidae): Shell architecture and its functional meaning. Marine Micropaleontology. 1995; 26(1 - 4): p. 461 - 467.
14. Nguyễn Văn Săng Vô, Mai Hoàng Đảm. Xây dựng bản ảnh hóa thạch trùng lỗ (foraminifera) trong đá carbonate trước Cenozoic ở đảo Cát Bà, Hải Phòng và trong một số giếng khoan phía bắc bể Sông Hồng. VPI. 2016.
15. PVEP-ITC. Đề án nghiên cứu địa chất, địa vật lý của móng carbonate trước Cenozoic ở các lô 102/10 và 106/10. 2014.
16. L.van der Plas, A.C.Tobi. A chart for judging the reliability of point counting results. American Journal of Science. 1965; 263: p. 87 - 90.
17. Liêu Kim Phượng, Bùi Thị Luận, Vũ Thị Tuyền. Nghiên cứu thạch học và sự biến đổi sau trầm tích của đá móng carbonate tuổi Paleozoic ở phía Tây Bắc bể Sông Hồng. Tạp chí Khoa học và Công nghệ Việt Nam. 2019; 61(8): trang 1 - 6.
18. M.Soloman, R.Green. A chart for designing modal analysis by point counting. Geologische Rundsch. 1966; 55: p. 844 - 848.
19. M.E.Tucker. Shallow-marine carbonate facies and facies models. Geological Society. 1985; 18: p. 147 - 169.
20. Marcelle K.Boudagher-Fadel. Evolution and geological significance of larger benthic foraminifera. Developments in Palaeontology & Stratigraphy. 2008.
21. Peter A.Scholle, Dana S.Ulmer-Scholle. A color guide to the petrography of carbonate rocks: Grains, textures, porosity, diagenesis. American Association of Petroleum Geologist Tulsa. 2003; 77: p. 372 - 375.
22. Robert J.Dunham. Classification of carbonate rocks according to depositional textures. American Association of Petroleum Geologist (AAPG) Memoir. 1962; 1: p. 108 - 121.
23. VPI. Petrography report from the 106-YT-2X. 2009.
24. VPI. Petrography report from the 106/10-HRD-1XST. 2016.

1. The Author assigns all copyright in and to the article (the Work) to the Petrovietnam Journal, including the right to publish, republish, transmit, sell and distribute the Work in whole or in part in electronic and print editions of the Journal, in all media of expression now known or later developed.
2. By this assignment of copyright to the Petrovietnam Journal, reproduction, posting, transmission, distribution or other use of the Work in whole or in part in any medium by the Author requires a full citation to the Journal, suitable in form and content as follows: title of article, authors’ names, journal title, volume, issue, year, copyright owner as specified in the Journal, DOI number. Links to the final article published on the website of the Journal are encouraged.