From 1990-96, the first phase of our history, we acquired 3-D seismic data in 28 plays, seven basins and seven states. In 1997 and 1998, the second phase of our history, we invested $64 million on 3-D seismic data and acreage in selected plays where we were experiencing attractive 3-D delineated drilling economics and meaningful repeatability.  These investments provided us with possibly the largest 3-D delineated prospect inventory of any small independent in the domestic basins.     In 1999, we entered our third phase, the harvesting phase.  That year we began to intently focus our resources on drilling in our 3-D delineated prospect inventory, primarily in the five focus plays where we had experienced excellent results.
Focus Areas / Core Provinces Brigham's exploration and development activities are concentrated in three core onshore provinces: The Anadarko Basin of western Oklahoma and the Texas Panhandle; the Texas Gulf Coast; and West Texas >