i thought this link might be useful for u, the average job salaries of different engineers is listed in the link given below
http://www.wowjobs.ca/Salary.aspx?q1=process+engineer&l1=calgary&q2=piping+engineer&l2=calgary&q3=mechanical+engineer&l3=calgary&q4=mining+engineer&l4=calgary&q5=petroleum+engineer&l5=calgary&q6=drilling+engineer&l6=calgary&q7=reservoir+engineer&l7=calgary&q8=production+engineer&l8=calgary&q9=chemical+engineer&l9=calgary&q10=petroleum+engineer&l10=calgary&Si=checked
http://www.wowjobs.ca/Salary.aspx?q1=process+engineer&l1=calgary&q2=piping+engineer&l2=calgary&q3=mechanical+engineer&l3=calgary&q4=mining+engineer&l4=calgary&q5=petroleum+engineer&l5=calgary&q6=drilling+engineer&l6=calgary&q7=reservoir+engineer&l7=calgary&q8=production+engineer&l8=calgary&q9=chemical+engineer&l9=calgary&q10=petroleum+engineer&l10=calgary&Si=checked