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Subsalt Imaging in the Kaombo Development, Angola

Kaombo is a multifield development on Block 32 in Angola. Approximately two-thirds of the block is covered with a salt canopy that strongly degrades visibility, which prevented a good estimation of the resources and their distribution in several subsalt areas during the initial years of exploration. However, the last decade has seen a dramatic improvement in seismic processing, enabled by the increase in high-performance computing (HPC) capabilities. Through examples of subsalt fields of the Kaombo project, we show how new techniques have had a positive effect.

Introduction

In the Kaombo development, Tertiary turbiditic reservoirs are located below the salt canopy. Unlike other blocks of the lower Congo basin that are more proximal to the shore, a shallow canopy of complex-shaped salt bodies below the sea surface covers much of the block. The salt bodies create strong lateral seismic-velocity variations that are highly detrimental to classical time-processing approaches. Thus, prospect-maturation work during the early days of this block (1999 to 2001) was focused on targets outside of the salt influence.

This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper OTC 24132, “Kaombo, From Exploration Toward Development: A Decade of Progress in Subsalt Imaging,” by V. Martin, A. Douillard, L. Lemaistre, V. Clerget, and C. Gerea, Total E&P, prepared for the 2013 Offshore Technology Conference, Houston, 6–9 May. The paper has not been peer reviewed. Copyright 2013 Offshore Technology Conference. Reproduced by permission.
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Subsalt Imaging in the Kaombo Development, Angola

01 March 2014

Volume: 66 | Issue: 3

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