In characterizing hydrocarbon reservoirs, estimating reserves, and developing models for how to best extract the hydrocarbons, it is useful to know the lithology and associated porosity of the rocks in the target interval. It is particularly important to have accurate estimates of volumes and flow characteristics early in the development of deepwater reservoirs, as sizing the facilities to the resource is a significant component of an economically successful project. Accurate characterization of the reservoir can be a challenge in this situation as well control is typically very limited.

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