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## Segment Revenue 

<img src='content_image/206402.jpg'>

## Segment Operating Income 

<img src='content_image/206403.jpg'>

(1) “Corporate and other” represents those items that are not directly relating to a particular segment. 

“NM” means not meaningful. 

## Segment Operating Income Margins  (1) 

<img src='content_image/206404.jpg'>

(1)  Calculated by dividing “Operating Income” by “Revenue.” 

## Reservoir Description 

Revenue for our Reservoir Description segment increased, by 5.4%, to $522.3 million in 2013 compared to $495.5 million in 2012, an increase of 5.5% compared to $469.8 million in 2011. This segment’s operations, which focus on international crude-oil related products, continued to benefit from an increasing number of large-scale core analyses and reservoir fluids characterization studies in the Asia-Pacific areas, offshore West and East Africa, the eastern Mediterranean region and the Middle East, including Iraq, Kuwait and the United Arab Emirates. 

Operating income increased to $146.3 million in 2013 from $144.5 million in 2012 and $116.2 million in 2011. This segment empha- sizes technologically demanding services on internationally-based development and production-related crude oil projects over the more cyclical exploration-related projects. These increases are a result of higher sales, including a better mix of projects aimed at more complex reservoirs, over the fixed cost structure. 

## Production Enhancement 

Revenue for our Production Enhancement segment increased by $48.6 million, or 12.0% in 2013 compared to 2012, primarily due to the continued successful introduction of Core’s new FLOWPROFILER $_{ }$™ service and our new completion diagnostic services for opti- mizing completions and stimulations of horizontal wells. Revenue for our Production Enhancement segment increased 8.7% in 2012 compared to 2011 primarily due to demand for our stimulation diagnostic services both for fracture diagnostics in North America and field flood diagnostics internationally. 

