Figure 1. A. Pacific OCS index map (after Dunkel, 1999). MMS estimates of the discovered and undiscovered, conventionally recoverable oil and gas resources of the Pacific OCS range from 14-19 billion BOE, of which over 1.3 billion BOE have been produced since production began in 1968.

B. Proven and unproven oil and gas fields in the Santa Maria and Santa Barbara-Ventura basins of the California OCS (after Sorensen, 2000). Twenty-four OCS fields (yellow areas in federal waters) have been discovered but remain undeveloped because of federal and state offshore drilling restrictions. Limited published data indicate that at least five prospects entirely in state waters remain unevaluated (yellow areas in state waters) (Reed, 2000). The total reserve potential of all undeveloped fields and prospects may range from 1.5-3.4 billion BOE.