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Petroleum Science >2012,??Issue 2:??141-153 DOI: https://doi.org/10.1007/s12182-012-0194-9

Geochemical characteristics and diagenetic systems of dolomite reservoirs of the ChangxingFormation in the eastern Sichuan Basin, China Open?Access

文章信息

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作者：Zhang Bing,Zheng Rongcai,Wang Xuben,Zheng Chao,Wen Huaguo,Luo Yuan and Chi Yuelong
作者單位：

State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Engineering, Chengdu University of Technology, Sichuan 610059, China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Engineering, Chengdu University of Technology, Sichuan 610059, China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Engineering, Chengdu University of Technology, Sichuan 610059, China;Chongqing Gas Mine, PetroChina Southwest Oil and Gasfield Company, Chongqing 401120, China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Engineering, Chengdu University of Technology, Sichuan 610059, China;Sichuan Science and Technology Worker University, Sichuan 610059, China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Engineering, Chengdu University of Technology, Sichuan 610059, China

投稿時(shí)間：2011-06-23
引用方式：Zhang, B., Zheng, R., Wang, X. et al. Pet. Sci. (2012) 9: 141. https://doi.org/10.1007/s12182-012-0194-9

文章摘要

In order to discuss the relationship between dolomite reservoirs and diagenetic systems of the Changxing Formation, we studied carbon, oxygen and strontium stable isotopes, iron, manganese and strontium trace elements and the Mg/Ca (mol%) ratio, dolomite order degree, and determined that burial dolomitization is the key to controlling the distribution of high quality dolomite reservoir in the Changxing Formation in the eastern Sichuan Basin. The dolomite of the Changxing Formation is divided
into four diagenetic systems: (1) penecontemporaneous stage syngenetic brine diagenetic system, (2) early diagenetic stage strata seal brine diagenetic system, (3) middle-late diagenetic stage mixed hot brine diagenetic system and (4) tectonic uplift stage mixed hydrothermal fluid diagenetic system. New understanding of the controlling factors and distribution of dolomite reservoir development is discussed. Reef shoal facies belts controlled regional reservoir distribution and the scale of development. Burial dolomitization of a strata seal brine diagenetic system is the foundation of reservoir development, mainly developing pore reservoir. Burial dolomitization of mixed hot brine diagenetic system expanded the reservoir distribution and improved the reservoir quality, mainly developing pore-vug reservoir. Fracturing dissolution of a mixed hydrothermal fluid diagenetic system is the key to improving the reservoir quality, mainly developing pore-vug-crack complex reservoirs.

關(guān)鍵詞

    Eastern Sichuan Basin, Changxing Formation, dolomite reservoir, diagenesis, geochemicalcharacteristics, diagenetic system