Abstract of the Project:

To encourage, facilitate and accelerate the development of tight gas reservoirs in the
Appalachian basin, the geological surveys in Pennsylvania and West Virginia collected
widely dispersed data on five gas plays and formatted these data into a large database that
can be accessed by individual well or by play. The database and delivery system that
were developed can be applied to any of the 30 gas plays that have been defined in the
basin, but for this project, data compilation was restricted to the following: the
Mississippian-Devonian Berea/Murrysville sandstone play and the Upper Devonian
Venango, Bradford and Elk sandstone plays in Pennsylvania and West Virginia; and the
“Clinton”/Medina sandstone play in northwestern Pennsylvania. In addition, some data
were collected on the Tuscarora Sandstone play in West Virginia, which is the lateral
equivalent of the Medina Sandstone in Pennsylvania.



Modern geophysical logs are the most common and cost-effective tools for evaluating
reservoirs. Therefore, all of the well logs in the libraries of the two surveys from wells
that had penetrated the key plays were scanned, generating nearly 75,000 scanned e-log
files from more than 40,000 wells. A standard file-naming convention for scanned logs
was developed, which includes the well API number, log curve type(s) scanned, and the
availability of log analyses or half-scale logs.



In addition to well logs, other types of documents were scanned, including core data
(descriptions, analyses, porosity-permeability cross-plots), figures from relevant chapters
of the Atlas of Major Appalachian Gas Plays, selected figures from survey publications,
and information from unpublished reports and student theses and dissertations. Monthly
 and annual production data from 1979 to 2007 for West Virginia wells in these plays are
available as well. The final database also includes digitized logs from more than 800 
wells, sample descriptions from more than 550 wells, more than 600 digital photos in 1-
foot intervals from 11 cores, and approximately 260 references for these plays.



A primary objective of the research was to make data and information available to
producers through an on-line data delivery model designed for public access on the
Internet. The web-based application that was developed utilizes ESRI’s ArcIMS GIS
software to deliver both well-based and play-based data that are searchable through useroriginated
queries, and allows interactive regional geographic and geologic mapping that
is play-based. System tools help users develop their customized spatial queries.



A link also has been provided to the West Virginia Geological Survey’s “pipeline” 
system for accessing all available well-specific data for more than 140,000 wells in West
Virginia. However, only well-specific queries by API number are permitted at this time.



The comprehensive project web site resides on West Virginia Geological Survey’s
servers and links are provided from the Pennsylvania Geological Survey and Appalachian
Oil and Natural Gas Research Consortium web sites.
None
[]
{'Title': 'Appalachian Tight Gas - Berea\\Murrysville (BERE)', 'Author': 'West Virginia Geological and Economic Survey (WVGES)', 'Comments': 'Abstract of the Project:\nTo encourage, facilitate and accelerate the development of tight gas reservoirs in the\nAppalachian basin, the geological surveys in Pennsylvania and West Virginia collected\nwidely dispersed data on five gas plays and formatted these data into a large database that\ncan be accessed by individual well or by play. The database and delivery system that\nwere developed can be applied to any of the 30 gas plays that have been defined in the\nbasin, but for this project, data compilation was restricted to the following: the\nMississippian-Devonian Berea/Murrysville sandstone play and the Upper Devonian\nVenango, Bradford and Elk sandstone plays in Pennsylvania and West Virginia; and the\n“Clinton”/Medina sandstone play in northwestern Pennsylvania. In addition, some data\nwere collected on the Tuscarora Sandstone play in West Virginia, which is the lateral\nequivalent of the Medina Sandstone in Pennsylvania.\n\nModern geophysical logs are the most common and cost-effective tools for evaluating\nreservoirs. Therefore, all of the well logs in the libraries of the two surveys from wells\nthat had penetrated the key plays were scanned, generating nearly 75,000 scanned e-log\nfiles from more than 40,000 wells. A standard file-naming convention for scanned logs\nwas developed, which includes the well API number, log curve type(s) scanned, and the\navailability of log analyses or half-scale logs.\n\nIn addition to well logs, other types of documents were scanned, including core data\n(descriptions, analyses, porosity-permeability cross-plots), figures from relevant chapters\nof the Atlas of Major Appalachian Gas Plays, selected figures from survey publications,\nand information from unpublished reports and student theses and dissertations. Monthly\nand annual production data from 1979 to 2007 for West Virginia wells in these plays are\navailable as well. The final database also includes digitized logs from more than 800\nwells, sample descriptions from more than 550 wells, more than 600 digital photos in 1-\nfoot intervals from 11 cores, and approximately 260 references for these plays.\n\nA primary objective of the research was to make data and information available to\nproducers through an on-line data delivery model designed for public access on the\nInternet. The web-based application that was developed utilizes ESRI’s ArcIMS GIS\nsoftware to deliver both well-based and play-based data that are searchable through useroriginated\nqueries, and allows interactive regional geographic and geologic mapping that\nis play-based. System tools help users develop their customized spatial queries.\n\nA link also has been provided to the West Virginia Geological Survey’s “pipeline”\nsystem for accessing all available well-specific data for more than 140,000 wells in West\nVirginia. However, only well-specific queries by API number are permitted at this time.\n\nThe comprehensive project web site resides on West Virginia Geological Survey’s\nservers and links are provided from the Pennsylvania Geological Survey and Appalachian\nOil and Natural Gas Research Consortium web sites.', 'Subject': 'Berea/Murrysville play-specific layers as used in the Appalachian Tight Gas Project', 'Category': '', 'AntialiasingMode': 'None', 'TextAntialiasingMode': 'Force', 'Keywords': 'tight sands,tight gas,gas'}
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