Process Engineering | Geophysics

# Geophysics

Faculty of Engineering. UBA

Las Heras 2214 3rd Floor. (C1127AAR) Ciudad Autónoma de Buenos Aires.

Phone: + 54 11 4514 3014

## Research Field

Geomagnetism.

Solar activity.

Seismic activity.

Telluric currents.

RESEARCH:

-Physical and mathematical modeling - numerical simulation -.Engineering applications

pipelines.

-Other applications Forecasts disturbed periods of solar maximum.

-Estimation of strong earthquakes.

## Members

**Direction:**

**Larocca, Patricia. PhD.** Profesora Adjunta.

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**Toso, Victoria. Engineer.**

**Girardi, Daniel. **

**Siciliano, Miguel A. **

## Work Description

The geophysics group is dedicated to the study of physical data and mathematical modeling processes that occur in systems of gas and oil carriers.

These works are carried out by non-destructive material. Whereas that during periods of intense geomagnetic storms are generated current geo magnetically induced circulating through the ducts. The effects generated a reduction in their useful life due to corrosion processes. Most or less corrosion occurs according to the frequency and amplitude originated currents during the storm, the area exposed by the driver, the bed on which is, their location, etc. Some of the factors impact on these processes of corrosion are: the electrical conductivity of soil, network size and quality of insulation.

In areas where there is a marked change in the conductivity of the bed can also be a drain current through imperfections insulating coating, generating high currents and flows generally are not fully offset by current cathodic protection systems.

Previous studies indicate that the effects of corrosion caused by currents are highest when the induced field fluctuations have periods between 5 and 30 minutes. During large storms, currents induced in the network, they can to be about 1000 Amp, not sufficient, in these cases the protection system

cathode.

The geophysics group has worked particularly in the following technological problem:

"Estimation of maximum current circulating pipelines,

national and international. " Canadian studies have related to pipelines

led to the thesis of Dr. Patricia A. Larocca.

An important aspect is the simulation of physical processes and technology from existence of different approaches to their resolution. The simplest is consider land-dimensional model formed by a finite number of layers different densities.

The contribution of researchers in physics and engineering in the interdisciplinary group is right to develop knowledge of the topic, with new tools that improve the procedures currently used.

ANALYSIS OF THE REDUCTION OF THE LIFE IN PIPELINES DURING GEOMAGNETIC STORMS:

The increase of corrosion in pipelines arises as a consequence of the appearance of anomalous currents generated during periods of intense geomagnetic storms.

Our studies of data analysis and modeling consider two lines work:

1 - Modeling the bed on which is supported by the pipeline, is currently used two-dimensional layer model (representing Earth) on the incident wave flat. Initially, we calculate the electric field on the surface considering vertical incidence of a magnetic field through a plane wave.Conductivity assume that the Earth varies in horizontal layers of different thicknesses. To efficient protection systems design, it must take into account not only resistivity of the bed, but there is also the deep structure (about

hundreds of meters) because the presence of resistive layers deep can increase circulating currents.

2 - Statistical studies to determine the occurrence of future sessions intense storms in order to prepare the real-time system to support impact. These developments are working with mathematical models representing physical time series.

Planning for the future:

1 - Extend the modeling of two to three dimensions.

2 - Develop and / or adapt new physical models for nonlinear mathematical apply to the occurrence of disturbed periods.

3 - Conduct studies of materials and coatings currently used in the construction of pipelines using the infrastructure and preparation researchers belonging to the Laboratory INTECIN materials.

4 - Work actively with investigators from groups INTECIN experimental analysis and modeling the statistical series data they obtained.

The innovation of this project is to implement an updated methodology, based on estimating the parameters without imposing any model.