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CASE HISTORY
RockView
Thru Service Improved Petrophysical Analysis and
Reserve
Estimate Accuracy
Location:
Kentucky, North America
Results
■ Delivered through-casing formation lithology
and mineralogy data
■ Improved porosity analysis by identifying
dolomitization in carbonate reservoirs
■ Reduced deployment risks
Challenge
■ Cased wellbores restricted deployment of
conventional openhole tools for formation
evaluation
■ Required formation lithology and mineralogy
data through the casing
■ Minimize HS&E risks associated with
radioactive-source deployments
The RockView Thru service analysis matched the XRD and XRF analysis of the conventional cores that were obtained
from an offset
openhole well.
A major North
American exploration company
required detailed formation lithology and mineralogy
data to better
understand the reservoir and improve
the existing petrophysical analysis. Since the casing
was already
installed, additional openhole data and
conventional cores could not be obtained without
undertaking costly casing removal. The operator
needed to understand if dolomitization had occurred
in the carbonate reservoir in order to improve the
porosity analysis.
indicated an increase of siliciclastic influx above the
main reservoir and clearly identified a coal seam in
the formation. The mineralogy information from the
log helped generate a representative formation
matrix model that improved the porosity analysis.
Operational expense was significantly reduced by
acquiring detailed formation mineralogy data
through the casing, which eliminated the need to
pull out the casing. Through-casing acquisition also
reduced HS&E risks associated with the
deployment of wireline logging tools in an openhole
environment. The RockView Thru service uses a
non-chemical, pulsed-neutron source that
eliminates hazards associated with handling and
deploying radioactive-source-bearing tools.
deployed the RockView™ Thru
Baker Hughes
cased-hole formation evaluation service on wireline
to deliver detailed
formation lithology and
mineralogy data through the casing. The results
from the logged
interval provided an accurate
chemical and mineral characterization of the
formation. Analysis by the service matched the x-ray
diffraction (XRD) and x-ray fluorescence (XRF)
analysis of the conventional cores that were
acquired from an offset openhole well.
The RockView Thru service made it possible to
acquire critical formation evaluation data through
the casing without additional risks. The detailed
mineralogy and improved porosity analysis enabled
the operator to better characterize the formation
and more accurately estimate the reserves.
The resulting log showed increased dolomitization
near the upper section of the reservoir. It also
Baker Hughes solution
■ RockView Thru service
CASE HISTORY
The RockView Thru service helped generate a representative matrix model for improving porosity analysis and better reservoir characterization.
The RockView Thru service identified the presence of a coal seam in the formation.
RockView is a trademark of Baker Hughes Incorporated.
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© 2015 Baker Hughes Incorporated. All rights reserved. 42763 02/2015