A New Method to Identify Reservoirs in Tight Sandstones Based on the New Model of Transverse Relaxation Time and Relative PermeabilityReport as inadecuate




A New Method to Identify Reservoirs in Tight Sandstones Based on the New Model of Transverse Relaxation Time and Relative Permeability - Download this document for free, or read online. Document in PDF available to download.

Geofluids - Volume 2017 2017, Article ID 6787038, 8 pages - https:-doi.org-10.1155-2017-6787038

Research ArticleCollege of Geo-Exploration Science and Technology, Jilin University, Changchun, China

Correspondence should be addressed to Yuhang Guo

Received 14 January 2017; Accepted 9 March 2017; Published 19 April 2017

Academic Editor: Xiaorong Luo

Copyright © 2017 Yuhang Guo et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Relative permeability and transverse relaxation time are both important physical parameters of rock physics. In this paper, a new transformation model between the transverse relaxation time and the wetting phase’s relative permeability is established. The data shows that the cores in the northwest of China have continuous fractal dimension characteristics, and great differences existed in the different pore size scales. Therefore, a piece-wise method is used to calculate the fractal dimension in our transformation model. The transformation results are found to be quite consistent with the relative permeability curve of the laboratory measurements. Based on this new model, we put forward a new method to identify reservoir in tight sandstone reservoir. We focus on the Well M in the northwestern China. Nuclear magnetic resonance NMR logging is used to obtain the point-by-point relative permeability curve. In addition, we identify the gas and water layers based on new model and the results showed our new method is feasible. In the case of the price of crude oil being low, this method can save time and reduce the cost.





Author: Yuhang Guo, Baozhi Pan, and Lihua Zhang

Source: https://www.hindawi.com/



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