Ghost Ranch field, Nevada: New discovery from combined 3-D seismic and well log data

Citation
Sl. Montgomery et al., Ghost Ranch field, Nevada: New discovery from combined 3-D seismic and well log data, AAPG BULL, 83(9), 1999, pp. 1377-1391
Citations number
23
Categorie Soggetti
Earth Sciences
Journal title
AAPG BULLETIN-AMERICAN ASSOCIATION OF PETROLEUM GEOLOGISTS
ISSN journal
01491423 → ACNP
Volume
83
Issue
9
Year of publication
1999
Pages
1377 - 1391
Database
ISI
SICI code
0149-1423(199909)83:9<1377:GRFNND>2.0.ZU;2-9
Abstract
Ghost Ranch field was discovered in 1996 on the basis of a 3-D (three-dimen sional) seismic survey guided by analysis of log data from nearby existing wells. The 7 mi(2) (18 km(2)) survey had the initial goal of identifying in fill opportunities in Eagle Springs field and led to the drilling of a seri es of new producers. Results from this activity, combined with log data fro m nearby Rate Spring field, enabled the mapping of an oil-bearing Paleozoic slide-block mass between the two fields. A structural high with four-way c losure, roughly 40-50 ac (16-20 ha) in size, was identified and successfull y drilled to open Ghost Ranch field. Ghost Ranch produces from fractured De vonian dolomites at depths of about 4350-4400 ft (1326-1342 m). The held ha s a strong water drive, an oil column of 100 ft (30 m), and estimated origi nal oil in place (OOIP) of 2 million bbl. Production through January 1999 w as 216.7 mbbl(11% OOIP) from three wells. Success at Ghost Ranch suggests t hat the updip margins of the productive slide-block mass define an excellen t target for future exploration.