Discovery of Asphalt in the Upper Permian Reef Limestone in Liuqiao, Guangxi
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摘要: 研究区位于广西扶绥县东门镇和柳桥镇之间, 主要分布上二叠统和下三叠统地层.上二叠统包括合山组、上二叠统礁灰岩和大隆组.下三叠统罗楼组由泥岩和灰岩组成.大隆组主要为放射虫硅质岩和泥岩, 含有丰富的放射虫、有孔虫、介形虫、菌藻类、腕足类、菊石类和双壳类化石, 是好的烃源岩层.礁灰岩具有大量裂隙和孔洞, 是好的储集层.在柳桥地区东攀剖面、岜陇剖面和岜料剖面, 礁灰岩裂隙和孔洞普遍被沥青充填.研究区上二叠统礁灰岩是值得注意的油气勘探远景区.Abstract: The studied region, located between Dongmen and Liuqiao at Fusui in Guangxi, mainly consists of Upper Permian and Lower Triassic strata. The Upper Permian is divided into three units; they include the Heshan Formation, Upper Permian reef limestones, and Dalong Formation. The Lower Triassic mudstone and limestone are known as the Luolou Formation. The Dalong Formation consists predominantly of radiolarian cherts and mudstones, and contains abundant late Changhsingian fossils, including radiolarians, foraminifera, ostracods, fungus spores, brachiopods, ammonoids and bivalves. These sedimentary and lithological features of the Dalong Formation are indicative of good source rocks. The reef limestones are characterized by plentiful fractures and pore spaces, showing a nature of good reservoirs. The fractures and pores are generally filled by asphalt in Dongpan, Balong and Baliao sections at Liuqiao in southwestern Guangxi. On these points, the Upper Permian reef limestones in Liuqiao area would be of significance for the future exploration of oil and natural gas.
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Key words:
- asphalt /
- reef limestone /
- Upper Permian /
- southwest Guangxi
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图 1 柳桥地区地质略图及剖面位置(广西壮族自治区地质矿产局, 1985)
Fig. 1. Geological map of Liuqiao area and locations of studied sections
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Bureau of Geology and Mineral Resources of Guangxi Zhuang Autonomous Region, 1985. Regional geology ofGuangxi Zhuang Autonomous Region. Geological Pub-lishing House, Beijing, 5-211 (in Chinese). Feng, Q. L., He, W. H., Gu, S. Z., et al., 2007. Radiolarian evolution during the latest Permian in southern Guang-xi, China. Global and Planetary Change, 55 (1-3): 177-192. doi: 10.1016/j.gloplacha.2006.06.012 He, W. H., Shen, S. Z., Feng, Q. L., et al., 2005. A lateChanghsingian (Late Permian) deep-water brachiopodfauna fromthe Dalong Formation at the Dongpan sec-tionin southwestern Guangxi, South China. Journal of Paleontology, 79 (5): 927-938. doi: 10.1666/0022-3360(2005)079[0927:ALCLPD]2.0.CO;2 Meng, Y. Y., Feng, Q. L., He, W. H., et al., 2004. Sedi men-tary characteristics of the Permian-Triassic transitionalstage in the deep-sea basinin Liuqiao area, Guangxi andits geological significance. Earth Science—Journal ofChina University of Geosciences, 29 (suppl. ): 25-36 (in Chinese with English abstract). Meng, Y. Y., Zhou, Q. E., Li, Y. K., 2002. The characteris-tics and controlling sedi metaryfacies and granitoid anal-ysis of the middle part of Pingxiang-Dongmen largefault—An example of Dingming-Banli regions. Guangxi Geology, 15 (4): 1-4 (in Chinese with English ab-stract). Wang, Y. G., Wen, Y. C., Hong, H. T., et al., 2006. DalongFormation found in Kaijiang-Liangping oceanic troughin the Sichuan basin. Natural Gas Industry, 26 (9): 32-36 (in Chinese with English abstract). 广西壮族自治区地质矿产局, 1985. 广西壮族自治区区域地质志. 北京: 地质出版社, 5-211. 蒙有言, 冯庆来, 何卫红, 等, 2004. 广西柳桥深水相区古生代-中生代之交沉积特征及地质意义. 地球科学——中国地质大学学报, 29 (增刊), 25-36. 蒙有言, 周秋娥, 李玉坤, 2002. 凭祥-东门大断裂中段特征及控岩控相初析——以定明—板利地区为例. 广西地质, 15 (4): 1-4. https://www.cnki.com.cn/Article/CJFDTOTAL-GXDZ200204000.htm 王一刚, 文应初, 洪海涛, 等, 2006. 四川盆地开江-梁平海槽内发现大隆组. 天然气工业, 26 (9): 32-36. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG200609010.htm -
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