Logo: to the web site of Uppsala University

uu.sePublications from Uppsala University
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Geostatistical Modeling of the Upper Jurassic Arab D Reservoir Heterogeneity, Offshore Abu Dhabi, United Arab Emirates
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
2013 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The aim of this study is to statistically analyze the impact of diagenesis on reservoir-quality and to propose a specific workflow that will simulate the spatial distribution of rock textures, diagenetic trends, and reservoir properties by using material and data from 10 wells in a field from offshore Abu Dhabi (Jurassic Arab D Member), United Arab Emirates. Five parasequence sets (PS 1-5) are distinguished from Arab D and each of these starts with a deepening component, which is overlain by a maximum flooding surface/condensed section, followed by a shallowing component. Within the investigated database, seven rock textures are identified. Based on their grain size and whether they are mud- or grain-supported, they are grouped into three categories: 1) muddy textures; 2) packstone textures; 3) grainy textures. The statistical analysis has unravelled the diagenetic processes that have the biggest impact on reservoir-quality in the investigated oilfield, which include cementation by syntaxial calcite overgrowths and dolomitization. The models and the statistical analysis suggest that the best reservoirs are encountered in the central part of the investigated oilfield (i.e. shoal/outer shoal facies), where grain-supported limestone textures with syntaxial calcite overgrowth cement are common. These overgrowths have helped preserving depositional intergranular porosity and permeability during mechanical and chemical compaction. The results further reveal that the central part of the oilfield is more heterogeneous in terms of porosity and permeability distribution, compared to the northern and southern parts. A detailed description and quantification of both rock textures and diagenetic processes are necessary inputs for a valid geostatistical modeling of the reservoir properties, as diagenesis may modify the distribution of reservoir properties considerably only based on a rock texture simulation.

Place, publisher, year, edition, pages
2013. , p. 133
Series
Examensarbete vid Institutionen för geovetenskaper, ISSN 1650-6553 ; 253
Identifiers
URN: urn:nbn:se:uu:diva-472437OAI: oai:DiVA.org:uu-472437DiVA, id: diva2:1651171
Note

Arkivexemplar i Uppsala universitets arkiv

Available from: 2022-04-13 Created: 2022-04-11 Last updated: 2022-04-13Bibliographically approved

Open Access in DiVA

No full text in DiVA

By organisation
Department of Earth Sciences

Search outside of DiVA

GoogleGoogle Scholar

urn-nbn

Altmetric score

urn-nbn
Total: 30 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf