A deep learning approach to design a borehole instrument for geosteering

Author:

Shahriari M.1,Hazra A.2,Pardo D.3

Affiliation:

1. Software Competence Center Hagenberg GmbH, Hagenberg 4232, Austria..

2. Basque Center for Applied Mathematics, Bilbao 48009, Spain and University of the Basque Country, Leioa 48940, Spain..

3. Basque Center for Applied Mathematics, Bilbao 48009, Spain; University of the Basque Country, Leioa 48940, Spain; and Ikerbasque (Basque Foundation for Sciences), Bilbao 48011, Spain..

Abstract

Deep Neural Network (DNN)-based methods are suitable for the rapid inversion of borehole resistivity measurements. They approximate the forward and the inverse problem offline during the training phase and they only require a fraction of a second for the online evaluation (aka prediction). Herein, we propose a DNN-based iterative algorithm to design a borehole instrument such that the inverse solution is unique for a given earth parametrization. We select a large set of electromagnetic measurement systems routinely employed in logging operations, and our proposed DNN algorithm selects a subset of measurements that are suitable for inversion purposes. Numerical results with synthetic data confirm that this approach can provide valuable insight when designing borehole logging instruments.

Publisher

Society of Exploration Geophysicists

Subject

Geochemistry and Petrology,Geophysics

Reference2 articles.

1. Abadi, M., etal, 2015, TensorFlow: Large-scale machine learning on heterogeneous systems. (Software available from tensorflow.org).

2. Alvarez-Aramberri, J., and D. Pardo, 2017, Dimensionally adaptive hp-finite element sim

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