Unconventional Reservoir Characterization and Formation Evaluation: A Case Study of a Tight Sandstone Reservoir in West Africa

Amir Gharavi (), Karrar A. Abbas, Mohamed G. Hassan, Malik Haddad, Hesam Ghoochaninejad, Reham Alasmar, Salam Al-Saegh, Paria Yousefi and Ihab Shigidi ()
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Amir Gharavi: Bartlett School of Environment Energy & Resources (BSEER), University College London (UCL), Central House, 14 Upper Woburn Place, London WC1H 0NN, UK
Karrar A. Abbas: School of Energy and Electronic Engineering, Faculty of Technology, University of Portsmouth, Lion Gate Building, Lion Terrace, Portsmouth PO1 3HF, UK
Mohamed G. Hassan: School of Chemistry, Faculty of Engineering and Physical Sciences, The University of Southampton, Highfield Campus, University Road, Southampton SO17 1BJ, UK
Malik Haddad: New College of the Humanities, Northeastern University, London E1W 1LP, UK
Hesam Ghoochaninejad: Faculty of Earth Sciences, Kharazmi University, Mashhad 15719-14911, Iran
Reham Alasmar: Bartlett School of Environment Energy & Resources (BSEER), University College London (UCL), Central House, 14 Upper Woburn Place, London WC1H 0NN, UK
Salam Al-Saegh: Bartlett School of Environment Energy & Resources (BSEER), University College London (UCL), Central House, 14 Upper Woburn Place, London WC1H 0NN, UK
Paria Yousefi: Bartlett School of Environment Energy & Resources (BSEER), University College London (UCL), Central House, 14 Upper Woburn Place, London WC1H 0NN, UK
Ihab Shigidi: Chemical Engineering Department, College of Engineering, King Khalid University, Abha 61411, Saudi Arabia

Energies, 2023, vol. 16, issue 22, 1-26

Abstract: Unconventional reservoirs, including gas shales and tight gas sands, have gained prominence in the energy sector due to technological advancements and escalating energy demands. The oil industry is eagerly refining techniques to decipher these reservoirs, aiming to reduce data collection costs and uncertainties in reserve estimations. Characteristically, tight reservoirs exhibit low matrix porosity and ultra-low permeability, necessitating artificial stimulation for enhanced production. The efficacy of the stimulation hinges on the organic material distribution, the rock’s mechanical attributes, and the prevailing stress field. Comprehensive petrophysical analysis, integrating standard and specialized logs, core analyses, and dynamic data, is pivotal for a nuanced understanding of these reservoirs. This ensures a reduction in prediction uncertainties, with parameters like shale volume, porosity, and permeability being vital. This article delves into an intricate petrophysical evaluation of the Nene field, a West African unconventional reservoir. It underscores the geological intricacies of the field, the pivotal role of data acquisition, and introduces avant-garde methodologies for depth matching, rock typing, and the estimation of permeability. This research highlights the significance of unconventional reservoir exploration in today’s energy milieu, offering a granular understanding of the Nene field’s geological challenges and proffering a blueprint for analogous future endeavours in unconventional reservoirs.

Keywords: unconventional reservoirs; formation evaluation; reservoir characteristics; well logging; effective porosity; permeability (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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