Environmental Performance 1997-2001

PDO's Environmental Performance is measured through the CEPI (Composite Environmental Performance Indicator). CEPI is the weighted average of 14 individual Environmental Performance Indicators (EPIs). The weighting factor illustrates the relative importance of each EPI for PDO. Actual and target values as well as a short descriptions of the EPI's is given below. Click here for more details on CEPI or contact MSE/25.
 

Corporate Environmental Performance Index: "Date"
EPI description Weighting Factor actual 
1997		 actual 1998 actual 1999
actual 2000
 target
2001
actual 2001
1 % produced water disposed / injected with permit
4
 63
67
71.96
 67.8 94.63
2 % associated gas utilised
4
63 
64
78.48
 89.32 91.28  
                 
3 % flares meeting smoke limit of Ringelmann number <1
3
 29
26
17
 31 38
4 concentration of dispersed oil in aqueous effluent discharged (mg/l)
3
 15
12
17
 13 15  
5 Number of oil / water spills
3
 938
1252
1231
 541 504
6 % halon remaining in inventory
3
 40
39
22
 12 2  
7 % CFCs remaining in inventory
3
 100
82
82
 33 23
8 % hazardous waste disposed of with permit
3
 50
91
100
 100 100  
9 % tankers loading with segregated ballast tanks
2
 59
70
93
 83 95
10 % chemicals in use with a 'Safe Handling of Chemicals' card
2
 75
85
95
      
11 energy (MJ) used in drilling, seismic and production operations per BOE gross production
2
 43
38
30
12 % oil recovered from oil spills and returned to the crude oil system
1
 44
51
21
      
13 volume (m3) of water based mud disposed of on surface per 1000 m drilled
1
 225
210
210
14 volume (m3) of water based drilling cuttings disposed of on surface per 1000 m drilled
1
 57
60
60
      
CEPI
53
46
41