This study presents the results of the cementation and tortuosity factors for sandstones from Girei, part of the Yola arm of the Upper Benue Trough. It also presents the cementation factor for the individual/single rock samples using an experimentally determined value of the tortuosity factor. The cementation factor values were then compared with that obtained using an assumed value, in order to test the reliability or otherwise of using an assumed value of the tortuosity factor for cementation factor calculation irrespective of the formation of interest. Results of the cementation exponent and tortuosity factor for fourteen representative surface rock samples from the Girei sandstones were 3.73 and 1.39 respectively, indicating that the rocks are highly cemented and may contain clay which increases the value of the cementation factor. The cementation factor for each rock sample varied between 2.77± 25.74% and 5.42 ± 45.31% with an average of 3.96 ± 6.17% when the tortuosity factor is obtained from experiment and 2.94 ± 21.18% - 6.78 ± 54.96% with an average of 4.01 ± 7.51% when obtained with an assumed tortuosity factor of 1.0. The average value of the cementation factor calculated when the toruosity factor was obtained from experiment agrees more with the experimentally determined value. This showed that whenever the value of the cementation factor for each sample is required, an experimentally determined value of the tortuosity factor should be used rather than an assumed value.
PAPER TITLE :DETERMINATION OF THE CEMENTATION AND TORTUOSITY FACTORS FOR SANDSTONES FROM GIREI LOCAL GOVERNMENT A
JOURNAL Of SUSTAINABLE TECHNOLOGY | VOLUME 2 NUMBER 11 2011
- Author(s) : KANU, M.O. MELUDU, O.C. and ONIKU, A. S