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Yang S.,China University of Petroleum - East China | Yang S.,Reservoir Geology Key Laboratory of Shandong Province | Wen Y.,China University of Petroleum - East China | Wen Y.,Reservoir Geology Key Laboratory of Shandong Province | And 2 more authors.
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | Year: 2016

Clastic reservoir heterogeneity of the Second member of Dainan Formation in Zhenwu Oilfield in Yangzhou, Jiangsu Province, was quantitatively characterized by the method of data envelopment analysis. Each small layer was used as characterization unit in the process of calculation, and the evaluation group was formed with attribution parameters in each small layer of the whole region to determine the mathematical model. In addition, eight parameters which can influence the reservoir heterogeneity were considered to establish the linear programming model. The results show that the reservoir heterogeneity index is mainly between 0.5 and 0.9 with medium-strong heterogeneity in the second member of the Dainan Formation in Zhenwu Oilfield. And there is a positive correlation between the distribution of heterogeneity index and the sedimentary microfacies. The heterogeneity index has a direct impact on the effect of waterflooding. The larger the heterogeneity index is, the higher the absorption intensity and oil displacement efficiency are. The relationship between the heterogeneity index and the degree of water flooding is positive. The residual oil saturation and the heterogeneity index are negatively correlated. © 2016, Central South University of Technology. All right reserved. Source


Dong C.,China University of Petroleum - East China | Dong C.,Reservoir Geology Key Laboratory of Shandong Province | Ma C.,China University of Petroleum - East China | Lin C.,China University of Petroleum - East China | And 3 more authors.
Zhongguo Shiyou Daxue Xuebao (Ziran Kexue Ban)/Journal of China University of Petroleum (Edition of Natural Science) | Year: 2015

The composition of shale formation is complicated, and the lithofacies classification schemes are not unified. Using core observation, microscopic identification, whole rock analysis and organic geochemical data analysis, a comprehensive shale set lithofacies classification scheme, which is based on the principle of “ four-component and three-terminal element”, was established by adopting a method of combining macro structures of cores, organic content with rock types. The classification scheme introduces the organic matter content, and reflects the structural characteristics, mixed sedimentary characteristics of shale formations as well as its practicability. This classification scheme has been effectively applied to the study of lithofacies classification of shale set in the second Member of Funing Formation, Subei Basin, and may form a solid basis for the future shale reservoir space research, logging lithofacies identification and reservoir reconstruction evaluation. ©, 2015, Zhongguo Shiyou Daxue Xuebao (Ziran Kexue Ban)/Journal of China University of Petroleum (Edition of Natural Science). All right reserved. Source


Lin C.-Y.,China University of Petroleum - East China | Lin C.-Y.,Reservoir Geology Key Laboratory of Shandong Province | Dong C.-M.,China University of Petroleum - East China | Dong C.-M.,Reservoir Geology Key Laboratory of Shandong Province | And 8 more authors.
Zhongguo Shiyou Daxue Xuebao (Ziran Kexue Ban)/Journal of China University of Petroleum (Edition of Natural Science) | Year: 2013

The features of reservoir characterization were discussed through reviewing reservoir characterization history and oil field real case examples. The results show that reservoir characterization technology was developed and improved in order to solve the production problems in petroleum exploration and development. New technologies were developed in response to complications in individual reservoir problems. Development of related disciplines has advanced the theory and technology, which in turn also leads to development of new disciplines. The multi-discipline collaboration is the key to development of reservoir characterization. Reservoir heterogeneity characterization is the emerging challenge in reducing oil development costs and improving oil recovery ratio. The technology can be widely used in exploration, evaluation and development phases of oil and gas fields. The applications of the technology show that a healthy development cycle of "practical problems-technology development-practical application-solve problems" has come into being. Source

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