Mining Publication: Demonstration of Safety Plugging of Oil Wells Penetrating Appalachian Coal Mines

This page is archived for historical purposes and is no longer being maintained or updated. Contact NIOSH Mining if you need an accessible version.

Original creation date: July 1972

Reference - July 1972

NIOSHTIC2 Number: 10009769

U.S. Department of the Interior, Bureau of Mines. Technical Progress Report 56, NTIS No. PB-211350, 1986; :1-12

An oil well penetrating the Pittsburgh bituminous coalbed in northern West Virginia was plugged and safely mined through 3 months later. A sensitive chemical tracer, introduced into the oil reservoir before the test, was not detected in the mine air following the plugging and during mining of the pillar and penetration of the well. Effectiveness of the plugging in preventing reservoir gas from entering the mine through the well hole was verified by continuous monitoring of the mine air for indications of sulfur hexafluoride, an inert gas detectable in amounts as minute as 0.5 Part per billion. Expandable cement and fly ash-gel-water slurry were utilized to seal the well above and below the coal seam. Three other wells were also plugged using various techniques.

Authors: GE Rennick, J Pasini, FE Armstrong, JR Abrams

Image of publication Demonstration of Safety Plugging of Oil Wells Penetrating Appalachian Coal Mines
Reference - July 1972

NIOSHTIC2 Number: 10009769

U.S. Department of the Interior, Bureau of Mines. Technical Progress Report 56, NTIS No. PB-211350, 1986; :1-12


Page last reviewed: 9/21/2012 Page last updated: 9/21/2012