Abstract: A 3-D Seismic Look at Big Cowboy Field (Lower Wilcox Lobo), Webb County, Texas

MILLER, DAVID H., and BRAD A. BAKER
Conoco, Inc., Houston, TX

Big Cowboy field was discovered in 1978 by Enron Oil & Gas Company. The discovery well penetrated the Lower Wilcox Lobo sands but was eventually completed from the Upper Wilcox sands. Subsequent drilling targeted the Lobo sands and soon found them to be gas productive. Over the next 17 years the field was developed with a series of successful 2-D seismic programs. Cumulative production from wells drilled on 2-D seismic has exceeded 170 billion cubic ft of gas.

In 1994, Enron Oil & Gas Company shot a 3-D seismic program over Big Cowboy field but sold the field the following year to Conoco, Inc. Initial drilling results based on the 3-D survey have provided interesting insights into the field as well as into the benefits of 3-D seismic. While 3-D seismic will prove to be immensely invaluable, there is no substitution for knowing the stratigraphy of an area and incorporating basic reservoir information into an interpretation.

AAPG Search and Discovery Article #90932©1998 GCAGS/GCS-SEPM Meeting, Corpus Christi, Texas