An iterative inversion of Dual Induction Tool logs from thin-bedded Sandy-shaly formations of the Carpathian Foredeep using a modified simulated annealing method

• Autorzy: Wilkosz Michał , Wawrzyniak-Guz Kamila

Identyfikatory

DOI

10.1007/s11600-019-00343-w

• Języki publikacji: EN

Abstrakty

EN

In thin-bedded sandy–shaly Miocene formations of the Carpathian Foredeep, the main source of errors in gas saturation evaluation is the underestimation of resistivity of thin, hydrocarbon-bearing beds, which is the result of the low vertical resolution of induction logging tools. This problem is especially visible in older boreholes drilled in times where the Dual Induction Tool (DIT) was the primary induction tool used for determining the formation resistivity, and in shallowest depth intervals of newer boreholes where the DIT was used instead of newer array tools for cost-saving reasons. In this paper, we show how a global inversion algorithm was used to improve the vertical resolution of DIT logs. Our implementation of an iterative inversion utilizes a one-dimensional formation model, vertical response functions of the DIT, and a modified simulated annealing algorithm to determine the true vertical distribution of the formation resistivity. The algorithm was tested on resistivity logs recorded in a borehole drilled in the Carpathian Foredeep in Poland, where the DIT and the High-Resolution Array Induction (HRAI) tool were run in the same depth interval.

Słowa kluczowe

EN

well logs; thin beds; simulated annealing; iterative inversion; Dual Induction Tool

PL

geofizyka otworowa; cienkie warstwy; symulowane wyżarzanie

• Wydawca: Instytut Geofizyki PAN ; Springer
• Czasopismo: Acta Geophysica
• Rocznik: 2019
• Tom: Vol. 67, no. 6
• Strony: 1865--1873
• Opis fizyczny: Bibliogr. 16 poz.

Twórcy

autor

Wilkosz Michał

• Faculty of Geology, Geophysics and Environmental Protection, AGH University of Science and Technology, Kraków, Poland

autor

Wawrzyniak-Guz Kamila

• Faculty of Geology, Geophysics and Environmental Protection, AGH University of Science and Technology, Kraków, Poland

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).