Doctoral Dissertations
Keywords and Phrases
Carbonate reservoir; EOR; Recovery economics; Tar-mat; Unconventional oil
Abstract
"Tar-mat columns exist in many carbonate reservoirs in the Middle East. Historically, tar-mats have been thought to impede primary oil extraction, thus necessitating further improved oil recovery (IOR) technology applications. However, this research considers tar-mats as potential sources for unlocking extremely difficult crude oil, less than 5 ⁰API. The main objective of the study was to understand the qualitative physical and chemical properties of extremely viscous tar-mat oil and the quantitative potential of tar-mats to extract difficult oil.
The physical and chemical geneses of the tar-mat oil were analyzed utilizing several experimental geochemical techniques, including rock evaluation pyrolysis, liquid extracts (SARA analysis), and Pregl-Dumas (CHNSO) elemental analysis. The results showed that oil recovery increased significantly as the temperature increased, while the heavier compounds, Nitrogen, Sulfur, and Oxygen (NSO), decreased. The geochemical analysis results showed that the Kuwaiti carbonate reservoir under investigation was oilprone and capable of oil/gas production. Most of the rock samples were thermally mature and good in terms of hydrocarbon generation. Additionally, the Hydrogen to Carbon (H/C) ratio increased as the API decreased. Toluene treatment produced the greatest oil recovery pattern at all tested temperatures, while surfactant and hot water yielded less oil recovery, respectively.
This research proposes a novel method for systematically characterizing and evaluating tar-mat reservoir rocks so that a greater quantity of non-conventional tar-mat oils can be added to the world market. This research also proposes a new model that can contribute to API gravity prediction for solid tar-mats"--Abstract, page iii.
Advisor(s)
Bai, Baojun
Committee Member(s)
Flori, Ralph E.
Al-Bazzaz, Waleed
Wei, Mingzhen
Neogi, P. (Partho), 1951-
Department(s)
Geosciences and Geological and Petroleum Engineering
Degree Name
Ph. D. in Petroleum Engineering
Sponsor(s)
King Abdulaziz City for Science and Technology
Publisher
Missouri University of Science and Technology
Publication Date
Fall 2014
Pagination
xxiv, 256 pages
Note about bibliography
Includes bibliographical references (pages 250-255).
Geographic Coverage
Ahmadi, Kuwait
Rights
© 2014 Abdullah Owidah Almansour, All rights reserved.
Document Type
Dissertation - Open Access
File Type
text
Language
English
Subject Headings
Carbonate reservoirs -- Kuwait -- AhmadiEnhanced oil recoveryOil reservoir engineering
Thesis Number
T 10603
Electronic OCLC #
902730202
Recommended Citation
Almansour, Abdullah Owidah, "Investigating and modeling tar-mats in a Kuwaiti carbonate reservoir and their role in understanding oil reserves and recovery economics" (2014). Doctoral Dissertations. 2337.
https://scholarsmine.mst.edu/doctoral_dissertations/2337