(1) 3-D seismic coverage in oil & gas producing basins outside areas of current leasehold activity.

(2) 2003 planned seismic additions are primarily 3-D seismic data, the rights to which the Company acquired as part of a       2,750 square mile data purchase in late 2002, that is expected to be delivered to the Company in 2003.

TEXAS -- WILCOX AREAS

The prolific Wilcox trend in South Texas continues to be a primary area of exploration and development focus for Carrizo. The Company has a total of 1,793 square miles of 3-D seismic data that covers potential Wilcox formation exploration and development targets. Wilcox prospects occur at a variety of depths but are often relatively deeper targets with both high

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