Marcellus Shale
United States

Location  Extends through Pennsylvania, New York, Ohio, and West Virginia.
Assessment Year  2011
Area  900,000 acres
Reserves  84 TCF of undiscovered NG and 3.4 billion barrels of undiscovered gas liquids.
Thickness  900 feet
Formation Details  The Marcellus Formation is black shale that may contain limestone beds and concentrations of iron pyrite (FeS2) and siderite (FeCO3). Its sedimentary structure, or bedding, is moderately well developed. The formation is a part of the Devonian Black Shale Field. Also known as the Pennsylvania Shale (or New York Shale, West Virginia Shale, Ohio Shale).
Notes  The Marcellus is found throughout the Allegheny Plateau region of the northern Appalachian Basin of North America. In the United States, the Marcellus shale runs across the Southern Tier and Finger Lakes regions of New York, in northern and western Pennsylvania, eastern Ohio, through western Maryland, and throughout most of West Virginia extending across the state line into extreme western Virginia. The Marcellus bedrock in eastern Pennsylvania extends across the Delaware River into extreme western New Jersey. It also exists in the subsurface of a small portion of Kentucky and Tennessee. Below Lake Erie, it can be found crossing the border into Canada, where it stretches between Port Stanley and Long Point to St. Thomas in southern Ontario.

In April 2009, the United States Department of Energy estimated the Marcellus to contain 262 TCF of recoverable gas. In 2008, Terry Engelder, a Pennsylvania State University geosciences professor called his estimate of 4,800 km3 (1.7×1014 cu ft) (170 TCF) conservative. In November 2008, based on drilling results, Engelder increased his estimate of the amount of natural gas in the Marcellus to 363 TCF of recoverable resource, which would be enough to supply U.S. consumption for at least fourteen years. That estimate assumed some acreage in the Marcellus would not be gas bearing. If the entire formation did contain gas, Engelder said the formation could contain 4,359 TCF. Assuming a 30% recovery rate, this would lead to a 1,307 TCF.

Shale News

Projects and Work Interests

Anadarko Operations in Marcellus Shale
Anadarko holds approximately 760,000 Gross net acres (260,000 net acres) in Bradford, Centre, Clinton, Lycoming, Potter, Sullivan and Tioga counties.

Since 2006, Anadarko and its partners produce a...
Antero Operations in Marcellus Shale
Antero has 329,000 net acres, which is located in northern West Virginia and southwestern Pennsylvania, targeting the Marcellus Shale Play.
Cabot Operations in Marcellus Shale
Cabot had acreage in Susquehanna County in Pennsylvania with Marcellus shale formation.
Carrizo Operations in Marcellus Shale
Carrizo began in the Marcellus Shale formation, since 2007, which is located in New York, Pennsylvania and West Virginia. The Marcellus Shale formation is located at depths of 4000’ to 9000’. Carrizo ...
Carrizo/Reliance Operations in Marcellus Shale
The Carrizo/Reliance joint venture agreement covers approximately 104,400 gross acres in northern and central Pennsylvania.
Chevron/Reliance Operations in Southwestern Pennsylvania
The project is located in the Appalachian Basin in southwestern Pennsylvania, which is Marcellus shale formation.
Consol Energy/ Noble Energy Operations in Marcellus Shale
Consol and Noble target Marcellus shale project in three operating areas Central Pennsylvania, Northern West Virginia, and Southwestern Pennsylvania. Consol operates in the dry gas portion of Marcellu...
ECA Operations in Marcellus Shale
ECA targets Marcellus shale project, which is located in Greene county in the southwest corner of Pennsylvania.
Enerplus Operations in Marcellus Shale
Enerplus owns approximately 110,000 net acres of the Marcellus shale. Enerplus has non-operated acreage in Bradford, Susquehanna, Lycoming, Columbia, Tioga, Wyoming and Sullivan counties in northern P...
EQT Operations in Marcellus Shale
The EQT's Marcellus shale project is located in Southwestern Pennsylvania, where EQT holds approximately 95,000 acres in dry gas region, which includes Greene, Washington, and Allegheny counties. Also...
Gastar & Atinum West Virginia Project in Marcellus Shale
Gastar is developing the West Virginia acreage in partnership with Atinum Partners in Marcellus Shale covers 36,800 gross acres in West Virginia called Marcellus West. Acreage is in Marshall and Wetze...
Gastar Operations in Marcellus Shale
Gastar holds approximately 81,200 net (91,000 gross) acres in northern West Virginia and southwestern Pennsylvania in Appalachia area near acreage held by some of the most active participants in the M...
Gastar Pennsylvania Project
Gastar extended the development of the Marcellus Shale acreage with finalize an agreement with an offset operator to pool acreage in Grosick pad located in Butler County, Pennsylvania. Gastar holds ac...
Gastar West Virginia in Marcellus Shale
Gastar holds 62,000 net acres primarily in Preston, Tucker and Pendleton counties in West Virginia in a dry-gas area called Marcellus East acreage.
Highway 706 Project - Marcellus shale
Highway 706 Project located, in northeastern Pennsylvania, about 8 miles southwest of Montrose in west-central Susquehanna County, PA, which is focused on the Marcellus shale. The wells drilled in thi...
Magnum Operations in Marcellus Shale
Magnum Hunter Resources (MHR) holds 85,500 net acres located in the Marcellus Shale largely in Northwestern West Virginia and Southeastern Ohio.

The wells were drilled in Marcellus Shale as the fol...
Penn Virginia Corp Operations in Marcellus Shale (Low)
PVA has 35,000 net acres in Potter and Tioga Counties, Pennsylvania targeting Marcellus Shale.
Range Resources Operations in Marcellus Shale (Low)
Range Resources has 750,000 net acreage, targeting Marcellus play, located into different areas in the southwestern Pennsylvania and northern West Virginia and northeastern Pennsylvania.
SM Energy Operations in Marcellus Shale
SM Energy has a total acreage in the Marcellus shale approximately 43,000 net acres in McKean and Potter Counties in north central Pennsylvania.
Southwestern Energy Operations in Marcellus Shale
Southwestern’s Marcellus leaseholds, which are located in the northeast part of Pennsylvania, cover approximately 186,893 net acres (180,676 net undeveloped acres and 6,217 net developed acres held by...
Stone Energy Operations in Marcellus Shale (Low)
Stone Energy owns approximately 90,000 acres leasehold rights in West Virginia and Pennsylvania, targeting Marcellus Shale. Stone Energy focus drilling on Mary and Heather fields in West Virginia.

Trans Energy Operations in Marcellus Shale
Trans Energy owns 62,688 gross acres in core of the Marcellus Shale. Trans Energy and JV Partner Republic Energy hold interests 12,367 gross acres of leased and owned minerals in Marshall County, 28,6...
Ultra Petroleum Operations in Marcellus Shale (Low)
Ultra Petroleum had 500,000 gross (260,000 net) acres targeting Marcellus shale in five counties in north central Pennsylvania: Potter, Tioga, Clinton, Bradford, Centre and Lycoming counties. Ultra ha...

Gulf Oil and Gas
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