Отправлено: 21.06.07 04:04. Заголовок: Оптимизационная интерпретация каротажа (градиентный спуск+Monte-Carlo)

Computing Solutions for the Comprehensive
Interpretation of Well Logs J.A. Jarzyna* (AGH - University of Science and Technology), U. Woznicka (Institute of Nuclear Physics Cracow) & A. Cichy (AGH - University of Science and Technology)
SUMMARY
Computer systems for processing and interpreting well logs are based on deterministic or mixed
deterministic and statistical approach to the problem of porosity and mineral composition and water
saturation determination. Results of the comprehensive interpretation are get as the solution of a set of
equations. One equation is constructed for one log and in each equation porosity and volumes of mineral
components and water saturation are unknowns. Such systems are also used for the modeling of rock
response to the logging devices.
A crucial problem in the mathematical side of discussed systems is a precise parameterization of a
complicated rock formation in geophysical and geological aspects. Even many logs, i.e. equations, can not
describe all details and mutual relations between components of rock formation, mainly because of a priori
lack of all geological details of rock medium. The next problem the log analysts meet is an imperfection of
applied mathematical methods of solving a set of equations.
The paper discusses a way of improving the result of the comprehensive interpretation of well logging
combining two approaches, gradient Monte Carlo methods, to the problem of minimization of the error
function being the measure of the correctness of the interpretation solution.

Грустная картина
Авторы повторяют публикации 35 летней давности, причем в ухудшенном варианте.
А у меня в прошлом году вторую заявку с весьма приличной работой не приняли.