The Lithofacies Palaeogeography and Control of the Reservoirs in Middle Ordovician Ma5₄¹ Submember in Western Jingbian Tableland

Abstract:

The major rock types of Ordovician Majiagou Formation Ma5₄¹ Submember in western Jingbian Tableland include muddy dolomite, gypsum-bearing dolomite, gypsum dolomite, limy dolomite, and muddy powder crystal dolomite. This paper is based on the theory of sedimentary petrology and with the methodology of comprehensive mapping by using single factors to analyze multiple factors.Using stratum thickness, the content of gypsum and penecontemporaneous dolomite as single factors, we studied the lithofacies palaeogeography in Ma5₄¹ Submember.The results show that Ma5₄¹ is generally a set of sedimentation from supratidal limited evaporation environment and in the period of sea level decline with shallow water. The sedimentary microfacies are mainly composed of gypsum-bearing dolomitic flat and gypsum dolomitic flat ,dolomitic gypsum flat comes second. We combined the areas regional geological background with lithofacies palaeogeography to construct the limited evaporation tidal flat sedimentation maps of Ma5₄¹ Submember. Meanwhile,the control of reservoirs was studied. We thought that gypsum-bearing dolomitic flats and dolomitic flats provide a foundation for the development of large-area reservoirs.

• Periodical: Advanced Materials Research (Volumes 962-965)
• Pages: 193-202
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.962-965.193
• Online since: June 2014
• Authors: Shun She Luo, Qi Qi Lv*, Guang Ming Hu
• Keywords: Jingbian Tableland, Lithofacies Palaeogeography, Majiagou Formation, Ordos Basin

References

[1] Feng Zengzhao, Bao Zhidong, Zhang Yongsheng, Tan Jian, Kang Qifa, Han Zheng, Wang Yuxin, Zhang Chuanlu, Han Yuchun. Stratigraphy Petrology Lithofacies Paleogeography of Ordovician in Ordos. Beijing: Geological Publishing House, 121-129(1998).

[2] Hou Fanghao, Fang Shaoxian, Dong Zhaoxing, Li Ling, Lu Shuxiu, Wu Yi, Chen Yana. Developmental Characters of Sedimentary Environments and Lithofacies of Middle Ordovician Majiagou Formation in Ordos Basin, Acta Sedimentologica Sinca, 21(1): 106-112(2003).

[3] Hou Fanghao, Fang Shaoxian, HeJiang, Yang Xiyan, Fu Suotang, Wu Zheng, Yao Jingli, Yan Ronghui. Distribution Characters and Comprehensive Evaluation of Middle Ordovician Majiagou 51-54 Submembers Reservoirs in Jingbian Gas field Area, Ordos Basin. Marine Origin Petroleum Geology, 16(1): 1-13 (2011).

[4] Qiao Lin, Shen Zhaoguo, Fang Shaoxian, Hou Fanghao, Fu Suotang, Xu Liming, Ma Zhenfang, Yan Ronghui. The Main Controlled Factors of Heterogeneity of Middle Ordovician Majiagou 51-4 Reservoir in Jingbian Buried Platform and Its Periphery Area, Ordos Basin. Marine Origin Petroleum Geology, 12(1): 12-20 (2007).

[5] Liu Hongyun. Atlas of Palaeogeography of China. Beijing: Science Press (1995).

[6] Wu Yinglin, Zhu Zhongfa, Wang Jili. Lithofacies Palaeogeography of Early, Middle Triassic and Environmental Control of Sedimentary Mineral Resources on the Upper Yangtze Platform. Chongqing: Chongqing Publishing House (1989).

[7] Feng Zengzhao. Single factor analysis and comprehensive mapping method -methodology of lithofacies paleogeography. Acta Sedimentologica Sinica, 10(3): 70 -77 (1992).

[8] Feng Zengzhao. Single factor analysis and multifactor comprehensive mapping method—reconstruction of quantitative lithofacies palaeogeography. Journal of Palaeogeography, 6(1): 3-19(2004).

[9] Feng Zengzhao, Bao Zhidong, Wu Maobing, Jin Zhenkui, Shi Xiaozhang, Luo Airong. Lithofacies palaeogeography of the ordovician in Tarim area. Journal of Oalaeogeography, 9(5): 447-460 (2007).

[10] Hou Fanghao, Fang Shaoxian, Zhao Jingsong. Atlas of Carbonate Rock Reservoirs of Ordovican in Ordos Basin. Chengdu: Sichuan People's Publishing House (2002).