Reservoir Quality of Clastic and Carbonate Rocks: Analysis, Modelling and Prediction
CONTAINS OPEN ACCESS

Diagenetic controls on the location of reservoir sweet spots relative to palaeotopographical and structural highs
Correspondence: [email protected]
-
Published:January 01, 2018
-
CiteCitation
Jessica E. Poteet, Robert H. Goldstein, Evan K. Franseen, 2018. "Diagenetic controls on the location of reservoir sweet spots relative to palaeotopographical and structural highs", Reservoir Quality of Clastic and Carbonate Rocks: Analysis, Modelling and Prediction, P. J. Armitage, A. R. Butcher, J.M. Churchill, A.E. Csoma, C. Hollis, R. H. Lander, J. E. Omma, R. H. Worden
Download citation file:
- Share
Abstract:
Many carbonate reservoirs are located on top, or down the flanks, of extant structural highs or syndepositional palaeo-highs. This study examines diagenesis in Pennsylvanian oolitic reservoirs close to the crest and down the flank of a long-lived anticline. It illustrates that the position of the best reservoir quality shifted back and forth during successive diagenetic events. Cement stratigraphy shows that early diagenesis did not enhance reservoir character significantly. Most oomoldic porosity formed penecontemporaneously with compaction. Fluid-inclusion and stable isotope data indicate that late cements precipitated during burial conditions by refluxing brines and later hydrothermal fluids. After initial burial, greater permeability existed downdip, where smaller amounts of early meteoric cement allowed for compaction. Subsequent reflux cementation initially degraded downdip reservoirs preferentially and then progressed updip, resulting in relatively uniform reservoir porosity. Later hydrothermal events are most important in affecting the distribution of the highest quality present-day reservoir. Highest porosity is preserved in wells down the flanks of the structure, where hydrothermal cements are not as prevalent. Understanding the effect of diagenesis on location of the best reservoir in relation to palaeotopographical and structural highs allows for the prediction of reservoir quality using seismic and mapping data typically available in the subsurface.
- anticlines
- burial
- C-13/C-12
- calcite
- carbon
- carbonate rocks
- carbonates
- Carboniferous
- cement
- cementation
- Cenozoic
- compaction
- controls
- cores
- cracks
- cyclothems
- depositional environment
- diagenesis
- distribution
- early diagenesis
- fluid inclusions
- folds
- fossiliferous materials
- grains
- grainstone
- homogenization
- hydrothermal alteration
- inclusions
- isotope ratios
- isotopes
- Kansan
- Kansas
- Kansas City Group
- lithofacies
- metasomatism
- meteoric water
- microcracks
- microscope methods
- microthermometry
- Missourian
- O-18/O-16
- oolitic texture
- orientation
- oxygen
- packstone
- paleorelief
- Paleozoic
- paragenesis
- Pennsylvanian
- permeability
- petrography
- planar bedding structures
- Pleistocene
- porosity
- precipitation
- Quaternary
- reservoir rocks
- secondary structures
- sedimentary rocks
- sedimentary structures
- sequence stratigraphy
- solution
- stable isotopes
- stratigraphy
- stylolites
- stylolitization
- tectonic elements
- temperature
- textures
- United States
- Upper Pennsylvanian
- Central Kansas Uplift
- Raytown Limestone Member