ESTIMATION OF LAYER PARAMETERS USING VERY FAST SIMULATED ANNEALING METHOD IN ELECTRICALLY ANISOTROPIC MEDIA

Abstract

In this study, electrical anisotropy was investigated in horizontal and vertical directions. Strike and dip angles were examined with theoretical examples regarding of anisotropy in the horizontal direction. A square electrode array was preferred for this purpose. In general; when we plot the apparent resistivity data calculated in an electrically isotropic medium in the polar diagram, the shape of the apparent resistivity curve is circle. However, a flower shape was observed in an electrically anisotropic medium using apparent resistivity values in the polar diagram. In the second part of this work, the electrical anisotropy in the vertical direction was investigated. Schlumberger electrode array was used for examination of the anisotropy in the vertical direction. In the case of electrical anisotropic media, the theoretical data for layered structures were calculated and plotted. Then we explained that how layer parameters estimated from the theoretical curves using very fast simulated annealing method. Estimation of layer parameters were calculated by the method proposed in this study using the vertical electric sounding field data. Finally, these estimated results were compared with the result predicted value using the particle swarm optimization method with the same data set previously.

Keywords

• Electrical anisotropy,Very fast simulated annealing,Global optimization,Square array,Vertical electrical sounding

ELEKTRİKSEL YÖN BAĞIMLI ORTAMLARDA ÇOK HIZLI TAVLAMA BENZETİMİ YÖNTEMİ İLE TABAKA PARAMETRELERİNİN BELİRLENMESİ

Abstract

Bu çalışmada elektriksel anizotropi yatay ve düşey yönde incelenmiştir. Yatay yönde anizotropinin doğrultu ve eğimle değişimi teorik örneklerle araştırılmıştır. Bu amaç için kare elektrot dizilim kullanılmıştır. Genel olarak, elektriksel izotrop ortamlarda hesaplanan görünür özdirenç verilerini kutupsal koordinatlarda çizdiğimizde çember,  anizotrop olan ortamlarda ise çiçek yapısı şekli gözlenmiştir. Bu çalışmanın ikinci kısmında düşey yönde elektriksel anizotropi incelenmiştir. Düşey yönde anizotropi incelenirken Schlumberger elektrot dizilimi kullanılmıştır. Elektriksel olarak anizotrop olan ortamlarda tabakalı yapılar için teorik veriler hesaplanmış ve çizilmiştir. Daha sonra teorik eğrilerden tabaka parametreleri çok hızlı tavlama benzetimi yöntemi ile hesaplanmıştır.  Düşey elektrik sondaj arazi verilerinden önerilen yöntem ile tabaka parametreleri kestirilmiştir. Sonuçlar daha önce aynı veri setini kullanıp parçacık sürü optimizasyonu ile kestirilen tabaka parametreleri ile karşılaştırılmıştır. 

Keywords

• Elektriksel anizotropi,Çok hızlı tavlama benzetimi,Global en iyileme,Kare dizilim,Düşey elektrik sondajı

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