Interpretation software applied to the evaluation of shallow seismic data processing routines in fluvial deposits

Author(s)

do Prado, Ariel Henrique ^[1] ; de Almeida, Renato Paes ^[1] ; Tamura, Larissa Natsumi ^[1] ; Galeazzi, Cristiano Padalino ^[1] ; Ianniruberto, Marco ^[2]

Affiliation

^[1] Univ Sao Paulo, Inst Geociencias, Sao Paulo, SP - Brazil

^[2] Univ Brasilia, Inst Geociencias, Brasilia, DF - Brazil

• Document type: Journal article
• Source: BRAZILIAN JOURNAL OF GEOLOGY; v. 49, n. 2 2019.
• Web of Science Citations: 0

Abstract

High-resolution seismic surveys have been successfully applied in the study of active sedimentary environments in shallow submerged settings, particularly improving the interpretation of sedimentary facies and architectural elements that characterize fluvial rock records. Nevertheless, specific data processing workflows to emphasize sedimentary structures have not been proposed or tested, so that interpretation currently relies on the subjective opinion of individual interpreters, which might lead to biased conclusions. Aiming at the construction of a less biased data processing workflow, we developed a software that analyzes seismic data and performs standardized interpretation by linking individual seismic traces to generate interpreted reflector lines. A dataset acquired with boomer continuous seismic profiler in the sedimentary bed of the Amazonas river in Brazil was processed with a typical sequence of filter and gain (using Seismic UNIX software), as well as a routine of trace interpolation written in GNU Octave. The application of the Standardized Interpreter at different stages of processing enabled the comparison of the resulting interpretation scenarios in terms of the representation of geometries related to internal sedimentary structures, thus leading to the proposition of a workflow adapted to the specific needs of sedimentary structure interpretation from seismic data. (AU)

• FAPESP's process: 17/06874-3 - Fluvial dynamics and sedimentary deposits in the Amazon channel: providing tools to decipher the paleogeographical evolution of Amazonia and deposits of large anabranching rivers in the rock record
• Grantee: Cristiano Padalino Galeazzi
• Support type: Scholarships in Brazil - Doctorate
• FAPESP's process: 12/50260-6 - Structure and evolution of the Amazonian biota and its environment: an integrative approach
• Grantee: Lúcia Garcez Lohmann
• Support type: BIOTA-FAPESP Program - Thematic Grants
• FAPESP's process: 14/16739-8 - Developing facies models for large river systems: processes and products in active bars in the Brazilian Amazon and implications for the paleogeographic reconstructions of the Neogene Amazon and the Mesozoic of Gondwana in NE-Brazil and E-Australia
• Grantee: Renato Paes de Almeida
• Support type: Regular Research Grants
• FAPESP's process: 18/02197-0 - Integrated quantitative models for quaternary fluvial sedimentation and the distribution of the varzea and terra firme biomes in Western and central Amazonia
• Grantee: Ariel Henrique Do Prado
• Support type: Scholarships in Brazil - Master
• FAPESP's process: 16/03091-5 - CHARACTERIZATION OF HETEROGENEITIES AND MODELING OF RESERVOIR ANALOGUES IN FLUVIAL AND EOLIAN DEPOSITS
• Grantee: Liliane Janikian Paes de Almeida
• Support type: Regular Research Grants