Marcellus (Greylock Production LLC) PA is a producing unconventional gas field located onshore the US and is operated by Greylock Production.

Field participation details

The field is owned by Greylock Production.

Production from Marcellus (Greylock Production LLC) PA

The Marcellus (Greylock Production LLC) PA unconventional gas field recovered 43.23% of its total recoverable reserves, with peak production in 2019. The peak production was approximately 118 Mmcfd of natural gas. Based on economic assumptions, production will continue until the field reaches its economic limit in 2032.

Remaining recoverable reserves

The field is expected to recover 32.4 Mmboe, comprised of 194.41 bcf of natural gas reserves. Marcellus (Greylock Production LLC) PA unconventional gas field reserves accounts 0.03% of total remaining reserves of producing unconventional gas fields globally.


Information on the field is sourced from GlobalData’s fields database that provides detailed information on all producing, announced and planned oil and gas fields globally. Not all companies mentioned in the article may be currently existing due to their merger or acquisition or business closure.