Integration of uncertain well data for ... - Técnico Lisboa · Pedro Miguel Martins Pereira PhD...
Transcript of Integration of uncertain well data for ... - Técnico Lisboa · Pedro Miguel Martins Pereira PhD...
ANNUAL MEETING MASTER OF PETROLEUM ENGINEERING
03/05/2016 Instituto Superior Técnico
Integration of uncertain well data for seismic reservoir
characterization
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Pedro Miguel Martins Pereira
PhD Candidate
Supervisors:
Professor Leonardo Azevedo
Professor Amílcar Soares
Summary
• Motivation
• Methodology
• Real Case Application
• Conclusions
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Motivation
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Methodology
Stochastic sequential simulation with point distributions
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Real Case Application
Case Study Dataset
• Simulation grid size: 840x567x49;
• 6 available wells with Ip logs;
• Post-stack seismic reflection data (fullstack).
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(Global Stochastic Inversion Tests)
TEST 1
GSI without pointdistributions
TEST 2
Bayesian inversion (lowvariability)
TEST 3
Uniform distributions
TEST 4
Bayesian inversion (highvariability)
Real Case Application
GSI with point
distributions
Multidimensional
scaling
TEST 1
GSI without pointdistributions
TEST 2
Bayesian inversion (lowvariability)
TEST 3
Uniform distributions
TEST 4
Bayesian inversion (highvariability)
Tests with hard-data Tests without hard-data
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Well 4
(GSI Tests with HD)
Results display scale: (6000-18000 kPa.s/m)
Test 1 Test 2 Test 3 Test 4 Caliper Ip HD
Real Case Application
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Well 4
(GSI Tests with HD)
Real Case Application
MDS Space
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Well 4
(GSI Tests without HD)
Results display scale: (6000-18000 kPa.s/m)
Real Case Application
Test 1 Test 2 Test 3 Test 4
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Well 4
(GSI Tests without HD)
Real Case Application
MDS Space
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Well 5
(GSI Tests with HD)
Results display scale: (6000-18000 kPa.s/m)
Test 1 Test 2 Test 3 Test 4 Caliper Ip HD
Real Case Application
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Well 5
(GSI Tests with HD)
Real Case Application
MDS Space
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Well 5
(GSI Tests without HD)
Results display scale: (6000-18000 kPa.s/m)
Real Case Application
Test 1 Test 2 Test 3 Test 4
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Real Case Application
Well 5
(GSI Tests without HD)
MDS Space
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(GSI Tests with HD)
Real Case Application
All Wells (6) MDS Space
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Real Case Application
(GSI Tests without HD)
All Wells (6) MDS Space
Conclusions
• The stochastic sequential simulation with point distributions:
– allows the integration of uncertain experimental data and the estimation of the petro-elastic
properties measured along the well path;
– offers a better alternative for accounting for the collapsed sections uncertainty compared to
removing those sections;
– provides a framework to add information at the problematic zones and a better guide of the
inversion procedure near the wells.
• The inclusion of uncertainty on the experimental data increases considerably the
exploration of the model parameters space, reducing the uncertainty of the
properties at the well-logs.
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Thanks for your attention
QUESTIONS?
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