Get this from a library! Basic well log analysis. [George B Asquith; Charles R Gibson; Steven Kirk Henderson; Neil F Hurley; Daniel Krygowski;. Basic Well Log Analysis (Second Edition) By. George Asquith and Daniel Krygowski (with sections by Steven Henderson and Neil Hurley). AAPG Methods in. Front Matter. qxd 8/5/04 AM Page i. Basic Well Log Analysis (Second Edition). By George Asquith and Daniel Krygowski (with sections by Steven.

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Intelligent Control and AutomationVol. The weakness of method is that the output of inversion is highly influenced by arbitrary assumptions made for layer-thicknesses when creating a starting model i. The knowledge of reservoir boundaries is also required for reserve calculation.

Basic Well Log Analysis Course … – GEO – Spring – Universitetet i Oslo

A series expansion based discretization scheme ensures much more data against unknowns that significantly reduces the estimation error of model parameters.


Well logs contain information about layer-thicknesses, but they cannot be extracted by the local inversion approach.

Conventional inversion procedures routinely used in the oil industry perform the inversion processing of borehole geophysical data locally. The improved inversion method gives a fast, automatic and objective estimation to layer-boundaries and petrophysical parameters, which is demonstrated by a hydrocarbon field example.

Scientific Research An Academic Publisher. To fulfill this requirement, we suggest the use of our interval inversion method, which kygowski simultaneously all data from a greater depth interval to estimate petrophysical parameters of reservoirs to the same interval.

We showed earlier that the depth coordinates of layerboundaries can be determined within the interval inversion procedure. We perform multidimensional hierarchical cluster analysis on well-logging data before inversion that separates the measuring points of different layers on a lithological basis.

As a result, the vertical distribution of clusters furnishes the coordinates of layer-boundaries, which are then used as initial model parameters for the interval inversion procedure.

  ACI 531-79 PDF

As having krygowksi more types of data than unknowns in a depth, a set of marginally over-determined inverse problems has to be solved along a borehole, which is a rather noise sensitive procedure.

For the reduction of noise effect, the amount of overdetermination must be increased.

Basic Well Log Analysis Course …

Abdulaziz, Abdel Sattar A. In this study, we apply an automated procedure for the determination of rock interfaces. A genetic algorithm-based joint inversion method is presented for evaluating hydrocarbon-bearing geological formations.