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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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Abdulaziz, Abdel Sattar A. As having barely 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 krygowdki noise sensitive procedure. Scientific Research An Academic Publisher. Well logs contain information about layer-thicknesses, but they cannot be extracted by the local inversion approach. A genetic algorithm-based joint inversion method is presented for evaluating hydrocarbon-bearing geological formations.


To fulfill this requirement, we suggest the use of our interval inversion method, which inverts simultaneously all data anxlysis a greater depth interval to estimate petrophysical parameters of reservoirs to the same interval.

Basic Well Log Analysis Course …

We perform multidimensional hierarchical cluster analysis on well-logging data before inversion that separates the measuring points of different layers on a lithological basis. Conventional inversion procedures routinely used in the oil industry perform the inversion processing of borehole geophysical data locally.

Analysus the reduction of noise effect, the amount of overdetermination must be increased. We showed earlier that the depth coordinates of layerboundaries can be determined within the interval inversion procedure.

Intelligent Control and AutomationVol. The knowledge of reservoir boundaries is also required for reserve calculation.

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

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. 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.


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

In this study, we apply an automated procedure for the determination of rock interfaces.