Neural networks offer a non-algorithmic approach to geostatistical sim
ulation with the possibility of automatic recognition of correlation s
tructure. The paper gives a brief overview of neural networks and desc
ribes a feedforward, back-propagation network for geostatistical simul
ation. The operation of the network is illustrated with two simple one
-dimensional examples which can be followed through with hand calculat
ions to give an insight into the operation of the network. The converg
ence of the network is described in terms of the variogram calculated
from the values at each of the output nodes at each iteration.