Combined electric and electromagnetic inversion for high resolution of petrophysical properties

• Grant number: 14/18209-6
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• Start date: November 01, 2014
• End date: October 11, 2017
• Field of knowledge: Physical Sciences and Mathematics - Geosciences - Geophysics
• Agreement: Coordination of Improvement of Higher Education Personnel (CAPES)
• Principal Investigator: Jorge Luís Porsani
• Grantee: Vinicius Rafael Neris dos Santos
• Host Institution: Instituto de Astronomia, Geofísica e Ciências Atmosféricas (IAG). Universidade de São Paulo (USP). São Paulo , SP, Brazil

Abstract

Ambiguities are always present in the interpretation of geophysical data. One way to reduce this unwanted feature is the use of more than one research method in order to obtain a redundancy of information in the studied area. Through the combined inversion of data is possible to make an integrated interpretation of results from different methods. The inversion of the data is made more effective if the methods make use of the same physical property. For electrical resistivity (ER) and inductive electromagnetic (IEM) methods the electrical resistivity is a physical property in common. Thus, the joint inversion will be applied to resistivity and induction profiles in order to obtain higher lateral resolution, since the ER has a smaller radius of investigation and IEM a larger radius. At first, the joint inversion algorithm developed will be tested with synthetic data and then applied to real data. The goal is a more precise characterization and high resolution of the essential parameters of the well: porosity, permeability, saturation and radius research. The proposed methodology can be used in studies of hydrogeology, drilling engineering and mainly applied to drill for oil. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

SANTOS, VINICIUS R. N.; BORTOLOZO, CASSIANO A.; PORSANI, JORGE L.. Joint Inversion of Apparent Conductivity and Magnetic Susceptibility to Characterize Buried Targets. IEEE Geoscience and Remote Sensing Letters, v. 14, n. 6, p. 846-850, JUN 2017. (14/18209-6)

RAFAEL NERIS DOS SANTOS, VINICIUS; ALMEIDA, EMERSON RODRIGO; PORSANI, JORGE LUIS; TEIXEIRA, FERNANDO LISBOA; SOLDOVIERI, FRANCESCO. A Controlled-Site Comparison of Microwave Tomography and Time-Reversal Imaging Techniques for GPR Surveys. REMOTE SENSING, v. 10, n. 2, FEB 2018. (15/50488-5, 11/21013-8, 13/12606-0, 14/18209-6)