Geostatistics for the Next Century

To honour the remarkable contribution of Michel David in the inception, establishment and development of Geostatistics, and to promote the essence of his work, an international Forum entitled Geostatistics for the Next Century was convened in Montreal in June 1993. In order to enhance communication and stimulate geostatistical innovation, research and development, the Forum brought together world leading researchers and practitioners from five continents, who discussed-debated current problems, new technologies and futuristic ideas. This volume contains selected peer-reviewed papers from the Forum, together with comments by participants and replies by authors. Although difficult to capture the spontaneity and range of a debate, comments and replies should further assist in the promotion of ideas, dialogue and criticism, and are consistent with the spirit of the Forum. The contents of this volume are organized following the Forum's thematic sessions. The role of theme sessions was not only to stress important topics of tOday but in addition, to emphasize common ground held among diverse areas of geostatistical work and the need to strengthen communication between these areas. For this reason, any given section of this book may include papers from theory to applications, in mining, petroleum, environment, geohydrology, image processing.

Contenu
Estimating or Choosing a Geostatistical Model?.- Comment on Estimating or Choosing a Geostatistical Model? by O. Dubrule.- Reply to Comment on Estimating or Choosing a Geostatistical Model? by M.S. Handcock.- Comparison of CoIK, IK, mIK Performances for Modeling Conditional Probabilities of Categorical Variables.- Modeling Uncertainty: Some Conceptual Thoughts.- Comment on Modeling Uncertainty: Some Conceptual Thoughts by A.G. Journel.- The Role of Massive Grade Data Bases in Geostatistical Applications in South African Gold Mines.- Multiple Indicator Kriging of Precious Metals at Silbak Premier Mine, British Columbia.- Mineral Inventory of a Gold-Bearing Skarn, the Nickel Plate Mine Hedley, British Columbia.- Joint Temporal-Spatial Modeling of Concentrations of Hazardous Pollutants in Urban Air.- Spatiotemporal Modelling: Covariances and Ordinary Kriging Systems.- Geostatistics and Data Integration.- Modelling in the Presence of Skewed Distributions.- Comment on Modelling in the Presence of Skewed Distributions by C. Lemmer.- Reply to Comment on Modelling in the Presence of Skewed Distributions by R.M. Srivastava.- Exploration of the Nugget Effect.- Comments on F. Pitard's Exploration of the Nugget Effect.- A Fractal Correlation Function for Sampling Problems.- Image Compression and Kriging.- Comments on Image Compression and Kriging.- Reply to Comments on Image Compression and Kriging by P. Delfiner.- The use of Neural Networks for Spatial Simulation.- Joint Conditional Simulations and Flow Modeling.- The Method of Projection onto Convex Sets for the Reconstruction of Subsurface Property Maps.- Conditional Simulation and the Value of Information.- Comment on Conditional Simulation and the Value ofInformation by A.R. Solow and S.J. Ratick.- Fractals, Multifractals, and Change of Support.- Change of Scale in Random Media.- Direct Conditional Simulation of Block Grades.- Change of Support and Transformations.- Estimating Recoverable Reserves: Is it Hopeless?.- An Annealing Procedure for Honouring Change of Support Statistics in Conditional Simulation.- The Need for a Connectivity Index in Mining Geostatistics.- Is Research in Mining Geostats as Dead as a Dodo?.- Comments on Is Research in Mining Geostats as Dead as a Dodo? by M. Armstrong.- Testing for Bias Between Drilling Campaigns.- Improved Sampling Control and Data Gathering for Improved Mineral Inventories and Production Control.- Improving Predictions by Studying Reality.- Cleopatra's Nose and the Diagrammatic Approach to Flow Modelling in Random Porous Media.- Geostatistical Analysis of Water Saturation in Heterogeneous Unsaturated Media Under Capillary-Gravity Equilibrium.- Additive Logratio Estimation of Regionalized Compositional Data: An Application to Calculation of Oil Reserves.- Regionalization of some Hydrogeological Processes and Parameters by Means of Geo statistical Methods - Current Status and Requirements.- Combining Geophisical Data with Geological Prior Knowledge in a Geostatistical Framework: The Example of Cross-Well Tomographic Inversion.- Conditional fBm Simulation with Dual Kriging.- Algorithmically - Defined Random Function Models.- Measuring the Uncertainty in Kriging.- Fuzzy Geostatistics - An Integration of Qualitative Description into Spatial Analysis.- Robust Bayes Linear Prediction of Regionalized Variables.- A Fractal-Multifractal Approach to Geostatistics.- Probability Kriging of Sub-Seismic Fault Throws with Multifractal Distributions.