Abstract
This paper utilizes multi-methods, such as core observation, slice identification, isotope analysis, trace element analysis, fluid inclusion technique and so on, to study the causes of the dolomite in the Nanpu Sag and the origins of the dolomite reservoir. The study results show that the forming environment of dolomite in the Nanpu Sag is a fresh-water lake environment, and the dolomite is the product of dolomitization which is caused by volcanic thermal fluids in the Early Dongying period. With the development of intergranular pores in the dolomitization process, a lot of dissolved pores/vugs and fractures were formed by denudation in the later periods because of the influence of thermal fluids including the associated fluids of volcanic activities and the expelled hydrocarbon fluids of the source rocks. On the whole, these secondary dissolution spaces greatly enhance the reservoir ability of the dolomite, and there are enough reservoir spaces in the dolomite in the Nanpu Sag.
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References
Cheng Yongsheng and Chen Songling (2008) Hydrocarbon pool forming conditions of Paleozoic buried hill in peripheral of the Nanpu Sag [J]. Journal of Central South University (Science and Technology). 39, 590–595 (in Chinese).
Dong Yuexia, Xia Wencheng, and Zhou Haiming (2003) Evolvement sequence of Tertiary volcanic rocks in the Nanpu Sag, eastern China [J]. Petroleum Exploration and Development. 30, 24–26 (in Chinese).
Dong Yuexia, Zhou Haimin, and Xia Wenchen (2000) Volcanic activities and rift subsidence cycles in the Nanpu Sag [J]. Oil and Gas Geology. 21, 304–307 (in Chinese).
Fan Bojiang, Liu Chenglin, Pang Xiongqi, and Liu Chenglin (2011) The Effects of fault system on hydrocarbon formation in the Nanpu Sag, Bohai Bay Basin [J]. Oil and Gas Geology. 32, 192–206 (in Chinese).
George S.C. (1992) Effect of igneous intrusion on the organic geochemistry of a siltstone and an oil shale horizon in the Midland Valley of Scotland [J]. Organic Geochemistry. 18, 705–724.
Liu Guangdi, Sun Mingliang, Zhang Zhihuan, and Dong Yuexia (2010) Dynamic systems of petroleum accumulation in the Nanpu Depression, Bohai Bay Basin, China [J]. Acta Geologica Sinica (English edition). 84, 1273–1285.
Liu Shilin, Lin Ge, Zhou Ye, Gong Faxiong, and Zhang Desheng (2006) Distribution characteristics of elements in sedimentary rocks of the Nanpu Sag and their multiple statistic analysis [J]. Journal of Precious Metallic Geology. 15, 212–216 (in Chinese).
Montanez I.P. and Read J.F. (1992) Fluid-Rock interaction history during stabilization of early dolomites, Upper Knox Group (Lower Ordovician) [J]. Journal of Sedimentology. 62, 253–278.
Murray G.H. (1968) Quantitative fracture study, Sanish pool, Mckenzie County, North Dakota [J]. AAPG Bulletin. 52, 57–65.
Raymond A.C. and Murchison D.G. (1992) Effect of igneous activity on molecular maturation indices in different types of organic matter [J]. Organic Geochemistry. 18, 725–735.
Veizer Jan (1983) Trace elements and isotopes in sedimentary carbonates [J]. Reviews in Mineralogy and Geochemistry. 11, 265–299.
Wu Yunyun, He Mingzhong, Zhao Minlun, and Xu Juliang (2009) Thermo-decomposition characteristics of Yanfeng dolomite [J]. Journal of Wuhan University of Science and Technology. 32, 500–503 (in Chinese).
Xie Jianlei and Yang Kunguang (2006) Analysis of the closeness of the main faults in the Nanpu Sag in southeastern Hebei at key hydrocarbon accumulation moments [J]. Journal of Xi’an Shiyou University (Naturnal Science Edition). 21, 5–8 (in Chinese).
Zhang Jiazheng, Guo Jianhua, Zhao Guangzhen, Liu Xishun, and Guo Yong (2009) Palaeokarst of carbonates and hydrocarbon pooling in salients surrounding Nanbao depression [J]. Natural Gas Industry. 29, 123–128 (in Chinese).
Zhang Xiaobao, Xu Yongchang, and Wang Zhiyong (2000) Finding of the dolostones with special carbon isotopic composition and its significance [J]. Acta Sedimentologica Sinica. 18, 449–451.
Zheng Herong, Wu Maobing, Wu Xingwei, Liu Tao, and Liu Chunyan (2007) Oil-gas exploration prospect of dolomite reservoir in the Lower Paleozoic of Tarim Basin [J]. Acta Petrolei Sinica. 28, 1–7 (in Chinese).
Zhou Tianwei and Zhou Jianxun (2008) The forming mechanism of X style faults in the Nanpu Sag and its controlling on the hydrocarbon accumulation [J]. Geotectonica et Metallogenia. 32, 20–27 (in Chinese).
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Fan, B., Zhang, X., Zhang, J. et al. Dolomitization and the causes of dolomitization dolomite reservoir. Chin. J. Geochem. 31, 147–154 (2012). https://doi.org/10.1007/s11631-012-0561-7
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DOI: https://doi.org/10.1007/s11631-012-0561-7