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

  IEC 61892-3 PDF

In this study, we apply an automated procedure for the determination of rock interfaces. To fulfill this requirement, we suggest the use of our interval inversion method, which inverts simultaneously all data from a greater depth interval to estimate petrophysical parameters of reservoirs to the same interval.

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

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

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. A genetic algorithm-based joint inversion method is presented for evaluating hydrocarbon-bearing geological formations.

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

Conventional inversion procedures routinely used in the oil industry perform the inversion processing of borehole geophysical data locally.


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Basic Well Log Analysis Course …

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 wlel borehole, which is a rather noise sensitive procedure. For the reduction of noise effect, the amount of overdetermination must be increased.

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