Forward Modelling of Near Well-Bore Geology - a New Basis for Petrophysical Interpretation

Nordahl, Kjetil; Ringrose, P.; Waldum, A.; Næss, Arne; Brandsæter, Inge

doi:10.3997/2214-4609-pdb.5.p098

64th EAGE Conference &Amp; Exhibition 2002

DOI: 10.3997/2214-4609-pdb.5.p098

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Forward Modelling of Near Well-Bore Geology - a New Basis for Petrophysical Interpretation

Kjetil Nordahl¹,

P. Ringrose²,

A. Waldum³

et al.

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2005

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Geologically based estimation of k _v / k _h ratios: an example from the Garn Formation, Tyrihans Field, Mid-Norway

Elfenbein

Husby

Ringrose

2005

PGC

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Duringreservoirm odelbuilding, onee ncounters severals tagesw hereupscalingor averagingof petrophysicaldatai sr equired;coreplugd atah aveto be compared to wirelinemeasurements andwireline measurementsareaveraged to the scaleofbuilding-sizereservoirgrid cells. Simpleaveragingdoesnot,inmost cases,giverepresentativevalues,since the property inquestion isvery scale-dependent. Thisisespecially true for permeability andpermeability anisotropy( k v / k h ).For the caseofareservoirm odelo fthe Garn Formation (MiddleJ urassic)int he Tyrihans Field, asimple geologically based upscalingmethodi ncludingthe useofthe SBEDe softwarepackage hasbeendeveloped. Small-scalemodels ofnearw ell-boreg eologyareupscaled usingsingle-phasefl ow simulation to obtain directional-dependent permeabilitiesfor faciesw ithd ifferent mudc ontents andstyle.The resulting k v / k h estimation curvehasbeenimplemented inthe reservoirmodelbymodelling V shale asacontinuous parameterand applyingthe function to deriveupscaled horizontalandverticalp ermeability grids. Upscaled permeabilities werefoundto closely match the well test data.Thisapproach givesamorerealistic k v / k h ratiot hant raditionalm ethodsinvolvingsimplea veraging, or arbitrary guesses,ofverticalpermeability.

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Geologically based estimation of k _v / k _h ratios: an example from the Garn Formation, Tyrihans Field, Mid-Norway

Elfenbein

Husby

Ringrose

2005

PGC

View full text Add to dashboard Cite

show abstract

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Forward Modelling of Near Well-Bore Geology - a New Basis for Petrophysical Interpretation

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Geologically based estimation of k _v / k _h ratios: an example from the Garn Formation, Tyrihans Field, Mid-Norway

Geologically based estimation of k _v / k _h ratios: an example from the Garn Formation, Tyrihans Field, Mid-Norway

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Forward Modelling of Near Well-Bore Geology - a New Basis for Petrophysical Interpretation

Cited by 1 publication

References 0 publications

Geologically based estimation of k v / k h ratios: an example from the Garn Formation, Tyrihans Field, Mid-Norway

Geologically based estimation of k v / k h ratios: an example from the Garn Formation, Tyrihans Field, Mid-Norway

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Geologically based estimation of k _v / k _h ratios: an example from the Garn Formation, Tyrihans Field, Mid-Norway

Geologically based estimation of k _v / k _h ratios: an example from the Garn Formation, Tyrihans Field, Mid-Norway