Fast Model Update and Scenario Based Modelling for Decision Making in a Fast Track Pre-Salt Development

Saka, G.; Troth, I.; Franca, Carlos Antônio da Silva; Ramalho, Filipa; Hoffman, Sarah R.; Tollefsrud, J.; Haugse, V.; Torres, Diego Fernando Muñoz; Hansen, L.

doi:10.3997/2214-4609.201982107

First EAGE Workshop on Pre-Salt Reservoir: From Exploration to Production 2019

DOI: 10.3997/2214-4609.201982107

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Fast Model Update and Scenario Based Modelling for Decision Making in a Fast Track Pre-Salt Development

G. Saka¹,

I. Troth²,

Carlos Antônio da Silva Franca³

et al.

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Open fractures in pre-salt silicified carbonate reservoirs in block BM-C-33, the Outer Campos Basin, offshore Brazil

Wennberg

McQueen

Luca³

et al. 2021

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Natural open fractures are present in sidewall cores and in whole core samples from pre-salt reservoirs in the license BM-C-33 in the Campos Basin, Brazil. Open fractures are also observed in borehole image logs, and fracture densities are in general high. The highest density of open fractures is seen in the damage zones above and below larger cavities (Amalgamated Cavern Damage Zones - ACDZs). Outside the ACDZs the fracture density is high in silicified carbonates, where it tends to increase with decreasing porosity. Clean dolomites are less fractured than the silicified interval while the less brittle argillaceous dolomites have the lowest fracture density. Some fractures appear vuggy on borehole image logs and fracture densities are high close to vugs and larger cavities. The positive correlation between fractures and vugs is caused by flow of dissolving fluids through open fractures, and fracturing at stress concentrations around vugs, Two major fault zones have been interpreted from borehole image logs which have damage zones with very high fracture density. The well test permeability is much greater than the matrix permeability estimated from sidewall core and log measurements. This excess permeability is attributed to fractures, in combination with caverns and intervals with frequent vugs.

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Open fractures in pre-salt silicified carbonate reservoirs in block BM-C-33, the Outer Campos Basin, offshore Brazil

Wennberg

McQueen

Luca³

et al. 2021

View full text Add to dashboard Cite

show abstract

Bacalhau field - the development of a unique field in the pre-salt play

Nogueira¹,

Troth²,

Glitz³

et al. 2022

ROG

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Fast Model Update and Scenario Based Modelling for Decision Making in a Fast Track Pre-Salt Development

Cited by 2 publications

References 0 publications

Open fractures in pre-salt silicified carbonate reservoirs in block BM-C-33, the Outer Campos Basin, offshore Brazil

Open fractures in pre-salt silicified carbonate reservoirs in block BM-C-33, the Outer Campos Basin, offshore Brazil

Bacalhau field - the development of a unique field in the pre-salt play

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