Geostatistical 3D Density Modeling: Integrating Seismic Velocity and Well Logs

Bulhões, Frank C.; Lyrio, Julio Cesar S.O.; Amorim, Guilherme A. S.; Ferreira, Gleidson; Pereira, Emmanoelle Santos; Castro, Rosângela Foletto de; Formento, Catherine

doi:10.1190/sbgf2015-054

Cited by 2 publications

(2 citation statements)

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“…We used a single velocity of 4,500 m/s to the salt sequence (Schön 2015), and a regional velocity trend published by Bulhões et al (2015) to the sediments of the Lagoa Feia Group up to the basement rocks.…”

Section: Vp Cubementioning

confidence: 99%

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Marlim R3D: a realistic model for CSEM simulations - phase I: model building

Carvalho

Menezes

2017

Braz. J. Geol.

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ABSTRACT:The marine controlled-source electromagnetic (CSEM) method provides complementary information to seismic imaging in the exploration of sedimentary basins. The CSEM is mainly used for reservoir scanning and appraisal. The CSEM interpretation workflow is heavily based on inversion and forward -modeling for hypothesis testing. Until the recent past, the effectiveness of a given workflow was achieved after the drilling results, as there wasn't any geological complex model available to serve as a benchmark. In the present paper, we describe the workflow to build up Marlim R3D, a realistic and complex geoelectric model. Marlim R3D aims to be a reference model of turbidite reservoirs of the Brazilian continental margin. Our model is based on seismic interpretation and constrained by the input of available well-log information. The workflow used is composed of seven steps: seismic and well-log dataset loading, well-tie, Vp cube construction, Vp resistivity calibration, time-depth conversion, resistivity cube construction, and quality-control check. As a result, we obtained an interpreted dataset composed by main stratigraphic horizons, pseudo-well logs, and the resistivity cubes. These elements were made freely available for research or commercial use, under the Creative Common License, at the Zenodo platform. KEYWORDS

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Section: Vp Cubementioning

confidence: 99%

“…Those were smoothed and interpolated along the studied area using the Horizon Cube. For the salt and subsalt sequences, we have applied, respectively, a constant 4,550 m/s interval velocity, and a velocity trend based on the studies of Bulhões et al (2015).…”

Section: Time To Depth Conversionmentioning

confidence: 99%