1887

Abstract

Summary

This study investigates petrophysical and acoustic properties of two experimentally compacted reconstituted seal sequences (Late Triassic Snadd and Early Cretaceous Kolmule Formations) from two localities (Goliat field and Saline discovery) in the SW Barents Sea. Four samples were chosen from cuttings of two exploration wells 7122/7-3 (Goliat) and 7220/10-1 (Salina) drilled in the study area. The washed and freeze dried cutting samples were characterized for grain size analysis, geochemical (organic content) and mineralogical compositions. A total of eight compaction tests (four dry and four brine-saturated) were performed in the laboratory to apply a maximum vertical effective stress of 50 MPa. The maximum compaction observed in Snadd shale aggregates collected from the Goliat well (4.5% porosity). In order to study compaction history and seal integrity, the experimental results were compared with well log data. It is clear from comparison that the mechanical compaction of reconstituted shale and mudstone samples can be capable of describing natural processes, providing valuable insights on the state of mechanical/chemical compaction, and helping the seal integrity assessments. The results of this study will have applications in rock physics, basin modelling and top seal integrity.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201601220
2016-05-31
2020-09-26
Loading full text...

Full text loading...

References

  1. Avseth, P., Flesche, H., and Van Wijngaarden, A.
    [2003] AVO classification of lithology and pore fluids constrained by rock physics depth trends. The leading edge, October2003, 1004–1011.
    [Google Scholar]
  2. Mondol, N.H., Bjørlykke, K., Jahren, J. and Høeg, K.
    [2007] Experimental mechanical compaction of clay mineral aggregates-chenges in physical properties of mudstones during burial. Marine and Petroleum Geology, 24(5), 289–311.
    [Google Scholar]
  3. Mondol, N.H., Bjørlykke, K., and Jahren, J.
    [2008] Experimental Compaction of Kaolinite Aggregates - Effects of Grain Size on Mudrock Properties. 70th EAGE Conference & Exhibition, Rome, Italy, 9–12 June 2008.
    [Google Scholar]
  4. Ogebule, O.Y., Mondol, N.H., and Jahren, J.
    [2015] Seal Integrity of Late Jurassic to Early Cretaceous Mudrocks of the South-Western Barents Sea Area. 77th EAGE Conference & Exhibition 2015 IFEMA Madrid, Spain, 1–4 June 2015.
    [Google Scholar]
  5. Ohm, S.E., Karlsen, D.A. and Austin, T.J.F.
    [2008] Geochemically driven exploration models in uplifted areas: Examples from the Norwegian Barents Sea, AAPG Bulletin, 92(9), 1191–1223.
    [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201601220
Loading
/content/papers/10.3997/2214-4609.201601220
Loading

Data & Media loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error