Effects of uncertainty in rock-physics models on reservoirparameter estimation using marine seismic AVA and CSEM data

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This study investigates the effects of uncertainty inrockphysics models on estimates of reservoir parameters from jointinversion of seismic AVA and CSEMdata. The reservoir parameters arerelated to electrical resistivity using Archie's law, and to seismicvelocity and density using the Xu-White model. To account for errors inthe rock-physics models, we use two methods to handle uncertainty: (1)the model outputs are random functions with modes or means given by themodel predictions, and (2) the parameters of the models are themselvesrandom variables. Using a stochastic framework and Markov Chain MonteCarlo methods, we obtain estimates of reservoir parameters as well as ofthe uncertainty in the ... continued below

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Chen, Jinsong & Dickens, Thomas April 9, 2007.

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This study investigates the effects of uncertainty inrockphysics models on estimates of reservoir parameters from jointinversion of seismic AVA and CSEMdata. The reservoir parameters arerelated to electrical resistivity using Archie's law, and to seismicvelocity and density using the Xu-White model. To account for errors inthe rock-physics models, we use two methods to handle uncertainty: (1)the model outputs are random functions with modes or means given by themodel predictions, and (2) the parameters of the models are themselvesrandom variables. Using a stochastic framework and Markov Chain MonteCarlo methods, we obtain estimates of reservoir parameters as well as ofthe uncertainty in the estimates. Synthetic case studies show thatuncertainties in both rock-physics models and their associated parameterscan have significant effects on estimates of reservoir parameters. Ourmethod provides a means of quantifying how the uncertainty in theestimated reservoir parameters increases with increasing uncertainty inthe rock-physics model and in the model parameters. We find that in theexample we present, the estimation of water saturation is relatively lessaffected than is the estimation of clay content and porosity.

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  • Society of Exploratory Geophysicists (SEG) 2007Annual Meeting, San Antonio, Texas, 23-28 September2007

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  • Report No.: LBNL--62608
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 927830
  • Archival Resource Key: ark:/67531/metadc895659

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  • April 9, 2007

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  • Sept. 27, 2016, 1:39 a.m.

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  • Dec. 5, 2016, 2:47 p.m.

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Chen, Jinsong & Dickens, Thomas. Effects of uncertainty in rock-physics models on reservoirparameter estimation using marine seismic AVA and CSEM data, article, April 9, 2007; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc895659/: accessed September 25, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.