Over Thirty Years of Petroleum Geostatistics

Collocated cokriging and neural-network multi-attribute transform in the prediction of effective porosity: A comparative case study for the Second Wall Creek Sand of the Teapot Dome field, Wyoming, USA

“…Among the wells, 25 wells were selected for the CCK and NN-MAT analyses and 39 wells were withheld for validation. We began with 25 wells and reduced the number of wells by five until 10 because a very small number (b10) of direct measurements does not allow a meaningful statistical inference in kriging (Dubrule, 2003;Delfinier and Hass, 2005). Thus, there are four cases: 25, 20, 15, and 10 wells.…”