critical shale smear factor for oil and gas

Shale Smear Factor

shale smear strip

shale smear zone

shale-smear

burgess shale shale

oil shale and oil shale residue

Abnormally Pressured Shale

active soft shale

Agrillaceous shale

Albert shale

alkali leach liquor of carbonaceous shale containi

Alkali Leach Liquor of Carbonaceous Shale Containing Vanadium

alum shale

alumina shale

aluminous shale

angular shale

areaceous shale

arenaceous shale