Numerical Experiments with Digital Twins of Core Samples for Estimating Effective Elastic Parameters

Galina Reshetova, Vladimir Cheverda, Tatyana Khachkova

Результат исследования: Публикации в книгах, отчётах, сборниках, трудах конференцийстатья в сборнике материалов конференциинаучнаярецензирование

Аннотация

The use of 3D Computed Tomography (CT) throws light on the interior structure of the core samples. That is why the 3D CT has become increasingly widespread in digital rock physics. However, the CT does not provide information about the elastic properties of the rocks. So far, the most common approach to recover these properties is static laboratory measurements, when a sample is subject to a variety of static loads, followed by the measurement of displacements. This way is rather expensive, time-consuming and sometimes result in the destruction of a sample. Instead, we propose to implement numerical experiments by solving a 3D elastic static problem to perform upscaling of the CT data and to compute effective elastic parameters. In fact, to find these parameters we need to resolve a huge system of linear algebraic equations, which is a troublesome task. We have decided not to use a direct solver, but to apply a new iterative relaxation technique by considering a dynamic elastic problem with a special choice of relaxation parameters. The approach proposed needs parallelization. We have come to the conclusion to use the new feature of the latest Fortran extension known as CoArray Fortran (CAF) and to compare the three ways of parallel implementation as applied to this problem: MPI, MPI+OpenMP and CAF. Our experiments have proved that CAF and MPI approximately demonstrate the same performance, but the CAF possesses a clearer structure and is easy for coding.

Язык оригиналаанглийский
Название основной публикацииSupercomputing - 5th Russian Supercomputing Days, RuSCDays 2019, Revised Selected Papers
РедакторыVladimir Voevodin, Sergey Sobolev
ИздательSpringer Netherlands
Страницы290-301
Число страниц12
ISBN (печатное издание)9783030365912
DOI
СостояниеОпубликовано - 2019
Опубликовано для внешнего пользованияДа
Событие5th Russian Supercomputing Days Conference, RuSCDays 2019 - Moscow, Российская Федерация
Продолжительность: 23 сен 201924 сен 2019

Серия публикаций

НазваниеCommunications in Computer and Information Science
Том1129 CCIS
ISSN (печатное издание)1865-0929
ISSN (электронное издание)1865-0937

Конференция

Конференция5th Russian Supercomputing Days Conference, RuSCDays 2019
СтранаРоссийская Федерация
ГородMoscow
Период23.09.201924.09.2019

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