Skip to Main Content
Skip Nav Destination
GEOREF RECORD

Delaware Mountain Group, West Texas and southeastern New Mexico, a case of refound opportunity; Part 1; Brushy Canyon

Scott L. Montgomery, John Worrall and Dean Hamilton
Delaware Mountain Group, West Texas and southeastern New Mexico, a case of refound opportunity; Part 1; Brushy Canyon
AAPG Bulletin (December 1999) 83 (12): 1901-1926

Abstract

Exploration in Permian (Guadalupian) deep-water sandstones of the Delaware Mountain Group, west Texas and southeast New Mexico, represents a success story of the 1990s derived from reevaluation of reservoirs previously deemed uneconomical. Recent discoveries have concentrated on the Brushy Canyon in New Mexico and, to a lesser extent, the Cherry Canyon in Texas. Brushy Canyon reservoirs in particular previously were overlooked due to indications of poor reservoir quality from log and well test data; however, oil shows observed on mud logs across the northern Delaware basin led to new completion efforts in the late 1980s and 1990s using gel-sand fracture stimulations. Productive reservoirs are very fine to fine-grained arkosic to subarkosic sandstones with porosities of 12-25% and permeabilities typically of 1-5 md. Better reservoir quality is concentrated in massive channel sandstones variably interpreted as deposited by turbidity or saline density currents. Significant clay content, lamination, and close interbedding between oil- and water-bearing units make log analysis and reserve estimates problematic. As a result, the mud log remains the cheapest, most practical indicator of pay. Reservoir sandstones can be divided into a series of major productive trends related to proximal/slope and more distal/basin-floor depositional settings. Well productivity is variable within each trend, but primary recovery rarely exceeds 10%. Options for enhanced recovery include pressure maintenance, waterflooding, and carbon dioxide flooding. Early indications suggest that carbon dioxide flooding may be most appropriate in these low-permeability, clay-bearing reservoirs.


ISSN: 0149-1423
EISSN: 1558-9153
Coden: AABUD2
Serial Title: AAPG Bulletin
Serial Volume: 83
Serial Issue: 12
Title: Delaware Mountain Group, West Texas and southeastern New Mexico, a case of refound opportunity; Part 1; Brushy Canyon
Affiliation: 1511 18th Avenue East, Seattle, WA, United States
Pages: 1901-1926
Published: 199912
Text Language: English
Publisher: American Association of Petroleum Geologists, Tulsa, OK, United States
Accession Number: 1999-064333
Categories: Economic geology, geology of energy sources
Document Type: Serial
Bibliographic Level: Analytic
N31°30'00" - N37°00'00", W109°04'60" - W103°00'00"
Secondary Affiliation: Scott Exploration, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data supplied by American Association of Petroleum Geologists, Tulsa, OK, United States
Update Code: 199922
Close Modal

or Create an Account

Close Modal
Close Modal