Please enable JavaScript for this site to function properly.
OnePetro
  • Help
  • About us
  • Contact us
Menu
  • Home
  • Journals
  • Conferences
  • Log in / Register

Log in to your subscription

and
Advanced search Show search help
  • Full text
  • Author
  • Company/Institution
  • Publisher
  • Journal
  • Conference
Boolean operators
This OR that
This AND that
This NOT that
Must include "This" and "That"
This That
Must not include "That"
This -That
"This" is optional
This +That
Exact phrase "This That"
"This That"
Grouping
(this AND that) OR (that AND other)
Specifying fields
publisher:"Publisher Name"
author:(Smith OR Jones)

Integrated 3D Static Modeling of a Complex Carbonate Upper Shuaiba Reservoir, Block 9, Oman North

Authors
Fahad Al Hadhrami (Occidental of Oman) | Eduard Maili (Occidental of Oman) | Ahmed Al Araimi (Occidental of Oman)
DOI
https://doi.org/10.2118/193087-MS
Document ID
SPE-193087-MS
Publisher
Society of Petroleum Engineers
Source
Abu Dhabi International Petroleum Exhibition & Conference, 12-15 November, Abu Dhabi, UAE
Publication Date
2018
Document Type
Conference Paper
Language
English
ISBN
978-1-61399-632-4
Copyright
2018. Society of Petroleum Engineers
Keywords
Upper Shuaiba, complex carbonate, 3D Static Modeling, Block 9, Oman North, in-situ rudist Buildup
Downloads
4 in the last 30 days
98 since 2007
Show more detail
View rights & permissions
SPE Member Price: USD 8.50
SPE Non-Member Price: USD 25.00
Abstract

The field was discovered in 1992. It produces oil and associated gas from two reservoir sub units of the Upper Shuaiba USh3F1 and USh3F2, and exhibits both structural and startighraphical traps. The reservoir units are compartmentalized by NW-trending normal faults into five fault blocks within the same field towards the North East. They are vertically separated by non-reservoir low permeability mudstone facies. US3F2 is setting above Orbitolina shale. The objective is to build a new geological model in a very complex carbonate reservoir, to allow for better reservoir development, and adding new field opportunities using state of art seismic data.

Lower unit (US3F2) consists of an aggradational sequence skeletal peloid-foram packstone/wackestone, and in-situ rudist-algal boundstone/packstone build-ups, which is localized to the NE-trending axis of the field. These sequences are deposited in a low to moderate energy environment. US3F2 reaches a maximum thickness of 50 ft in the rudist build-ups, but the width of the rudist-algal boundstone facies parallel to depositional dip (SE) is only 0.5–0.7 km. Cores exhibit abundant secondary porosity with an average of 30% and permeability up to 700 mD suggesting early subaerial exposure and leaching.

Upper unit (US3F1) is either absent or very thin across the crest and thickens to over 20 ft basinward; downdip, it is separated from US3F2 by a shale unit. US3F1 consists of an upward-shallowing deposits of Orbitolina mudstone, reworked stromatoporoid-rudist floatstone, small rudist floatstone, and fine skeletal grain-dominated packstone with rudist fragments.

3D model was generated covering large area of about 15x9km of the field. The new seismic horizon and faults interpretation were used in the 3D structural modeling. Cores descriptions and photos were used to define core facies, depositional environments and vuggy intervals. Rudist buildups direction of progradation was also defined based on BHI.

Reservoir rock Fabric number (RFN) was defined based on Lucia method and populated using veriogram per zone for the vertical wells using moving average method followed by Gaussian Random simulation, co-kriged with the moving average properties as a trend, for both vertical and horizontal wells. Porosity was populated with the same method. Water saturation and permeability were calculated using Lucia height function method.

Understanding of the reservoir heterogeneity, architecture and 3D modeling using RFN based on Lucia method allowed a better distribution of reservoir properties to be used in dynamic simulation for better history match, predict waterflood performance and adding new development areas.

File Size  3 MBNumber of Pages   18

Al Kindi, M.H., Richard, P.D., 2014. The main structural styles of the hydrocarbon reservoirs in Oman. In: Geological Society 392. Special Publications, London, pp. 409-445.

Amthor, J.E., C. Kerans, and P. Gauthier, 2010. Reservoir characterisation of a Shu’aiba carbonate ramp-margin field, northern Oman. In F.S.P. van Buchem, M.I. Al-Husseini, F. Maurer and H.J. Droste (Eds.), Barremian – Aptian Stratigraphy and Hydrocarbon Habitat of the Eastern Arabian Plate. GeoArabia Special Publication 4, Gulf PetroLink, Bahrain, v. 2, pp. 549-576.

Bazalgette, L. and Salem, H., 2018. Mesozoic and Cenozoic structural evolution of North Oman: New insights from high-quality 3D seismic from the Lekhwair area. Journal of Structural Geology, v. 111 (2018) pp. 1-13.

Droste, H.J., 2010. Sequence-Stratigraphic Framework of the Aptian Shu’aiba Formation in the Sultanate of Oman. In F.S.P. van Buchem, M.I. Al-Husseini, F. Maurer and H.J. Droste (Eds.), Barremian – Aptian Stratigraphy and Hydrocarbon Habitat of the Eastern Arabian Plate. GeoArabia Special Publication 4, Gulf PetroLink, Bahrain, v. 1, pp. 229-283.

Filbrandt, J.B.; Al-Dhahab, S.; Al-Habsy, A.; Harris, K.; Keating, J.; Al-Mahruqi, S.; Ozkaya, S.I.; Richard, P.D.; Robertson, T., 2006. Kinematics interpretation and structural evolution of North Oman, Block 6, since the Late Cretaceous and implications for timing of hydrocarbon migration into Cretaceous reservoirs. GeoArabia v. 11 (1), pp. 97-140.

Greenberg, M.L., and Castagna, J.P., 1992. Shear-wave velocity estimation in porous rocks: Theoretical formulation, preliminary verification and application. Geophysical Prospecting, v. 40 (2) pp. 195-209.

Jennings, J.W. and Lucia, F.J., 2003. Predicting permeability from well logs in carbonates with a link to geology for permeability modeling: Society of Petroleum Engineers Paper SPE 84942, pp. 215-225.

Lucia, F.J., 1995. Rock-fabric/petrophysical classification of carbonate core space for reservoir characterization. Bulletin of the American Association of Petroleum Geologists, v. 79, pp. 1275-1300.

Mijnssen, F.C.J.; Davies, A.H.; Grondin, K.; Keating, J.; Hsu, C.F.; and Amthor, J., 2003. Bringing Al Huwaisah’s Volume to Value: Presented at the SPE Annual Technical Conference and Exhibition, SPE 84285.

Morrison, W., 2005. Reservoir geological controls on production behavior in a Lower Cretaceous rudist reef, Al Huwaisah field, north Oman: AAPG Search and Discovery: article 90049.

Terken, J.M.J.; Frewin, N.L.; and Indrelid, S.L., 2001. Petroleum systems of Oman: charge timing and risks. Bull. Am. Assoc. Petroleum Geol. v. 85, pp. 1817-1845.

Other Resources

Looking for more? 

Some of the OnePetro partner societies have developed subject- specific wikis that may help.


 


PetroWiki was initially created from the seven volume  Petroleum Engineering Handbook (PEH) published by the  Society of Petroleum Engineers (SPE).








The SEG Wiki is a useful collection of information for working geophysicists, educators, and students in the field of geophysics. The initial content has been derived from : Robert E. Sheriff's Encyclopedic Dictionary of Applied Geophysics, fourth edition.

  • Home
  • Journals
  • Conferences
  • Copyright © SPE All rights reserved
  • About us
  • Contact us
  • Help
  • Terms of use
  • Publishers
  • Content Coverage
  • Privacy
  Administration log in