 It is natural that at the beginning of the exploration, when the number of wells is small, the correlation scheme contains expensive mistakes.The Danish scientist Nicolas Steno (1638–1686) is credited with three principles of sedimentation
The principles 1 allows defining the temporary relations between neighboring geological bodies, the principle 2 organizes the geometrical pattern of the succession of layers, the principle 3 helps uniting the parts of the layer found in separated geological cross-sections.Practical correlation has a lot of difficulties