M Bb l— a thousand barrels of crude oil 
M c f— one thousand cubic feet of natural gas 
M M c f— one m illion cubic feet of natural gas 
M — w hen used w ith $ equals m illions 
Net Acre s— gross acres m ultiplied by the Com pany’s 
w orking interest 
Net W ell s— gross w ells m ultiplied by the Com pany’s 
w orking interest 
PD P — proved developed producing reserves 
PU D — proved undeveloped reserves 
PV/ I— net change in the proved PV1 0  of the constant case 
reserve report divided by developm ent capital expenditures 
during the period under consideration less proceeds 
from  divestitures 
ROC E— return on capital em ployed defined as earnings 
before interest and taxes divided by assets m inus 
current liabilities 
O ne barrel of oil is the energy equivalent of six M cf of 
natural gas. 
A ll oil and gas quantity and revenue am ounts presented in 
this report are net of royalties. 
A ll currency am ounts presented in this report are show n in 
U S dollars except per share am ounts w hich are presented in 
Australian dollars or unless otherw ise noted by “ A $” , w hich 
represents Australian dollars.