Obtaining a high-resolution geological and petrophysical model from the results of reservoir-orientated elastic wave-equation-based seismic inversion

A previous geological and petrophysical model of the fluvio-deltaic Book Cliffs outcrops contained eight lithotypes, within each of which a number of lithologies were grouped. While this model was an adequate representation of the overall depositional architecture, for reservoir-geological purposes the potential reservoir and non-reservoir lithologies needed to be separated. Here, a new and more detailed geological model is presented in which more differentiation is put on the potential reservoir lithologies. This new model contains 12 lithologies with layers down to 1 m in thickness. Assuming a burial depth of 3 km and an average clay content, representative rock physical properties are assigned to lithologies based on published data. After the model thickness has been stretched by a factor of 4 in order to represent a more realistic reservoir, a full-waveform forward seismic response is modelled. These data are used as inputs into an iterative elastic wave-equation-based inversion scheme, with the goal to retrieve the rock properties and layer geometries. The results of this conceptual study show that sandstone units in the shoreface and distributary channels, which are potential reservoirs, are successfully identified. The recovery of medium parameters has a high resolution because the non-linear relationship between rock properties and the seismic data has been exploited.

[1]  D. Gisolf,et al.  Non-linear full-waveform inversion (FWI-res) of time-lapse seismic data on a higher-resolution geological and petrophysical model, Book Cliffs (Utah, USA) , 2015 .

[2]  S. Sharma,et al.  An Outcrop-based Detailed Geological Model to Test Automated Interpretation of Seismic Inversion Results , 2015 .

[3]  A. Gisolf,et al.  Reservoir Delineation by Applying a Nonlinear AVO Technique - A Case Study in the Nile Delta , 2015 .

[4]  P. Haffinger,et al.  Non-linear Full Wavefield Inversion Applied to Carboniferous Reservoirs in the Wingate Gas Field (SNS, Offshore UK) , 2014 .

[5]  Denes Vigh,et al.  Elastic full-waveform inversion application using multicomponent measurements of seismic data collection , 2014 .

[6]  Thomas Bohlen,et al.  3D elastic full‐waveform inversion of small‐scale heterogeneities in transmission geometry , 2013 .

[7]  Ilya Tsvankin,et al.  Full-waveform inversion of multicomponent data for horizontally layered VTI media , 2013 .

[8]  P. Haffinger,et al.  Seismic Broadband Full Waveform Inversion by shot/receiver refocusing , 2013 .

[9]  P. M. van den Berg,et al.  Broadband Full Waveform Inversion by Shot/Receiver Re-focusing , 2012 .

[10]  W. E. Galloway,et al.  Sequence Stratigraphy: Methodology and Nomenclature , 2011 .

[11]  Erika Angerer,et al.  Evaluation of 3C microelectromechanical system data on a 2D line: Direct comparison with conventional vertical-component geophone arrays and PS-wave analysis , 2011 .

[12]  P. M. Berg,et al.  Target Oriented Non-linear Inversion of Seismic Data , 2010 .

[13]  Dries Gisolf,et al.  The Principles of Quantitative Acoustical Imaging , 2010 .

[14]  R. Hofmann,et al.  Effective pressure or what is the effect of pressure , 2005 .

[15]  Simon A. J. Pattison,et al.  Storm-Influenced Prodelta Turbidite Complex in the Lower Kenilworth Member at Hatch Mesa, Book Cliffs, Utah, U.S.A.: Implications for Shallow Marine Facies Models , 2005 .

[16]  K. Bjørlykke,et al.  Velocity-depth trends in Mesozoic and Cenozoic sediments from the Norwegian Shelf , 2005 .

[17]  A. Coe,et al.  The Sedimentary Record of Sea-Level Change , 2003 .

[18]  J. Howell,et al.  Synthetic seismic modelling of a large-scale geological cross-section from the Book Cliffs, Utah, USA , 2000, Petroleum Geoscience.

[19]  A. Bouma,et al.  Fine-Grained Turbidite Systems , 2000 .

[20]  G. Hampson.  Discontinuity Surfaces, Clinoforms, and Facies Architecture in a Wave-Dominated, Shoreface-Shelf Parasequence , 2000 .

[21]  A. Nur,et al.  Critical porosity; a key to relating physical properties to porosity in rocks , 1998 .

[22]  Simon A. J. Pattison,et al.  Sequence Stratigraphic Significance of Sharp-Based Lowstand Shoreface Deposits, Kenilworth Member, Book Cliffs, Utah , 1995 .

[23]  J. Stafleu,et al.  Seismic models of a prograding carbonate platform: Vercors, south-east France , 1994 .

[24]  R. Ainsworth,et al.  Where have all the lowstands gone? Evidence for attached lowstand systems tracts in the Western Interior of North America , 1994 .

[25]  S. Flint,et al.  Sequence stratigraphy of Cretaceous shallow marine sandstones, Book Cliffs, Utah: application to reservoir modelling , 1993 .

[26]  Amos Nur,et al.  COMPRESSIONAL VELOCITY AND POROSITY IN SAND-CLAY MIXTURES , 1992 .

[27]  H. Posamentier,et al.  An Overview of the Fundamentals of Sequence Stratigraphy and Key Definitions , 1988 .

[28]  A. Nur,et al.  Effects of porosity and clay content on wave velocities in sandstones , 1986 .

[29]  C. A. Ross,et al.  Sea-level changes: An integrated approach , 1986 .

[30]  A. Tarantola.  Inversion of seismic reflection data in the acoustic approximation , 1984 .

[31]  B. Kennett,et al.  Seismic Wave Propagation in Stratified Media , 1983 .

[32]  P. Scholle,et al.  Sandstone Depositional Environments , 1982 .

[33]  E. Hamilton.  Geoacoustic modeling of the sea floor , 1980 .

[34]  Dries Gisolf,et al.  Acoustic nonlinear full-waveform inversion on an outcrop-based detailed geological and petrophysical model (Book Cliffs, Utah) , 2014 .

[35]  P. M. Berg,et al.  Target-oriented Non-linear Inversion of Time-lapse Seismic Data , 2010 .

[36]  T. Mukerji,et al.  The Rock Physics Handbook: Contents , 2009 .

[37]  R. Knipe,et al.  Influence of grain size and geothermal gradient on the ductile-to-brittle transition in arenaceous sedimentary rocks: implications for fault structure and fluid flow , 2007 .

[38]  G. Couples,et al.  The Relationship between Damage and Localization , 2007 .

[39]  J. Coleman,et al.  AAPG Memoir 72 / SEPM Special Publication No. 68, Chapter 11: Seismic Resolution of Submarine Channel Architecture as Indicated by Outcrop Analogs , 2000 .

[40]  J. Wagoner,et al.  Sequence stratigraphy of foreland basin deposits : outcrop and subsurface examples from the Cretaceous of North America , 1995 .

[41]  David R. Taylor,et al.  High-Frequency Sequence Stratigraphy and Paleogeography of the Kenilworth Member, Blackhawk Formation, Book Cliffs, Utah, U.S.A. , 1995 .

[42]  J. Wagoner,et al.  Stratigraphy and Facies Architecture of Parasequences with Examples from the Spring Canyon Member, Blackhawk Formation, Utah , 1995 .

[43]  M. Zoback,et al.  Empirical relationships among seismic velocity, effective pressure, porosity, and clay content in sandstone , 1989 .

[44]  J. M. Coleman,et al.  Deltaic Environments of Deposition , 1982 .

[45]  G. Manger,et al.  Porosity and bulk density of sedimentary rocks , 1963 .