Evaluation of Devonian shale gas reservoirs

Journal Article · Fri May 01 04:00:00 EDT 1987 · SPE (Society of Petroleum Engineers) Reserv. Eng.; (United States)

DOI:https://doi.org/10.2118/14446-PA· OSTI ID:6775289

Vanorsdale, C R

The evaluation of predominantly shale reservoirs presents a problem for engineers traditionally educated either to correct for or to ignore such lithologic zones. Currently accepted evaluation techniques and their applicability are discussed to determine the best way to forecast remaining recoverable gas reserves from the Devonian shales of the Appalachian basin. This study indicates that rate/time decline-curve analysis is the most reliable technique and presents typical decline curves based on production data gathered from 508 shale wells in a three-state study area. The resultant type curves illustrate a dual- (or multiple-) porosity mechanism that violates standard decline-curve analysis guidelines. The results, however, are typical not only for the Devonian shales but for all naturally fractured, multilayered, or similar shale reservoirs.

• OSTI ID: 6775289
• Journal Information: SPE (Society of Petroleum Engineers) Reserv. Eng.; (United States), Journal Name: SPE (Society of Petroleum Engineers) Reserv. Eng.; (United States) Vol. 2:2; ISSN SREEE
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
030100* -- Natural Gas-- Reserves-- (-1989)
04 OIL SHALES AND TAR SANDS
040100 -- Oil Shales & Tar Sands-- Reserves & Exploration-- (-1989)
29 ENERGY PLANNING, POLICY, AND ECONOMY
294003 -- Energy Planning & Policy-- Natural Gas
294004 -- Energy Planning & Policy-- Oil Shales & Tar Sands
APPALACHIA
BITUMINOUS MATERIALS
BLACK SHALES
CALCULATION METHODS
CARBONACEOUS MATERIALS
CHATTANOOGA FORMATION
DATA ANALYSIS
DEVONIAN PERIOD
ENERGY SOURCES
FLUIDS
FORECASTING
FOSSIL FUELS
FRACTURED RESERVOIRS
FUELS
GAS YIELDS
GASES
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC FORMATIONS
GRAPHS
LITHOLOGY
MATERIALS
MINERAL RESOURCES
NATURAL GAS DEPOSITS
NATURAL GAS WELLS
NORTH AMERICA
OIL SHALE DEPOSITS
OIL SHALES
PALEOZOIC ERA
POROSITY
PRODUCTION
RECOMMENDATIONS
RELIABILITY
RESERVES
RESOURCES
SHALE GAS
TIME DEPENDENCE
USA
WELLS
YIELDS