Reservoir quality evaluation of the Farewell sandstone by integrating sedimentological and well log analysis in the Kupe
- PDF / 4,545,041 Bytes
- 21 Pages / 595.276 x 790.866 pts Page_size
- 20 Downloads / 170 Views
ORIGINAL PAPER-EXPLORATION GEOLOGY
Reservoir quality evaluation of the Farewell sandstone by integrating sedimentological and well log analysis in the Kupe South Field, Taranaki Basin‑New Zealand S. M. Talha Qadri1 · Md Aminul Islam2 · Mohamed Ragab Shalaby2,3 · Ahmed K. Abd El‑Aal4 Received: 7 September 2020 / Accepted: 23 October 2020 © The Author(s) 2020
Abstract The study used the sedimentological and well log-based petrophysical analysis to evaluate the Farewell sandstone, the reservoir formation within the Kupe South Field. The sedimentological analysis was based on the data sets from Kupe South-1 to 5 wells, comprising the grain size, permeability, porosity, the total cement concentrations, and imprints of diagenetic processes on the reservoir formation. Moreover, well log analysis was carried on the four wells namely Kupe South 1, 2, 5 and 7 wells for evaluating the parameters e.g., shale volume, total and effective porosity, water wetness and hydrocarbon saturation, which influence the reservoir quality. The results from the sedimentological analysis demonstrated that the Farewell sandstone is compositionally varying from feldspathic arenite to lithic arenite. The analysis also showed the presence of significant total porosity and permeability fluctuating between 10.2 and 26.2% and 0.43–1376 mD, respectively. The diagenetic processes revealed the presence of authigenic clay and carbonate obstructing the pore spaces along with the occurrence of well-connected secondary and hybrid pores which eventually improved the reservoir quality of the Farewell sandstone. The well log analysis showed the presence of low shale volume between 10.9 and 29%, very good total and effective porosity values ranging from 19 to 32.3% as well as from 17 to 27%, respectively. The water saturation ranged from 22.3 to 44.9% and a significant hydrocarbon saturation fluctuating from 55.1 to 77.7% was also observed. The well log analysis also indicated the existence of nine hydrocarbon-bearing zones. The integrated findings from sedimentological and well log analyses verified the Farewell sandstone as a good reservoir formation. Keywords Farewell sandstone · Kupe South Field · Hydrocarbon saturation · Reservoir quality
Introduction The hydrocarbon exploration and field development procedures are rapidly shifting toward the investigation of complex geological settings (Islam et al. 2020). This has resulted * S. M. Talha Qadri [email protected] 1
Department of Earth Sciences, University of Toronto, Toronto, Canada
2
Geoscience Program, Faculty of Science, Universiti Brunei Darussalam, Jalan Tungko Link, Gadong BE 1410, Negara Brunei Darussalam
3
Geology Department, Faculty of Science, Tanta University, Tanta 31527, Egypt
4
Faculty of Engineering, Najran University, P.O. Box 1988, Najran, Saudi Arabia
in following the advanced procedures for enhancing production to meet the global energy requirements (Osinowo et al. 2018). Consequently, the integrated geological, geophysical and petrophysical schemes are use
Data Loading...
