Page 311 - Standard Handbook Petroleum Natural Gas Engineering VOLUME2

478 Reservoir Engineering

Table 5-37
Ultlmate Recovery (Primary Plus Secondary)
Ultimate Recovery eff iclency
recovery
at Secondary
average Average to
OOlP OOlP Primary Secondary Ultimate primary
BlNAF BDJAF 96 OOlP % OOlP % OOlP ratio
Pattern waterfloods
California sandstones 1,311 463 26.5 8.8 35.3 0.33
Louisiana sandstones 1,194 61 1 36.5 14.7 51.2 0.40
Oklahoma sandstones 728 201 17.0 10.6 27.6 0.62
Texas sandstones 942 362 25.6 12.8 38.4 0.50
Wyoming sandstones 774 346 23.6 21.1 44.7 0.89
Texas carbonates 388 123 15.5 16.3 31.8 1.05
Edge water injection
Louisiana sandstones 1,181 680 41.3 13.8 55.1 0.33
Texas sandstones 897 499 34.0 21.6 55.6 0.64
Gas injection info cap
California sandstones 909 396 29.4 14.2 43.6 0.48
Texas sandstones 957 412 35.3 8.0 43.3 0.23
From References 239 and 243.
Recovery Efficiency: Average value of the recoverable oil divided by the average value of the
original oil-in-place for the reservoirs in the classification.
OOIP: Original oil-in-place
B/NAF: Barrels per net acre-ft

Table 5-38
Secondary Recovery Efficiencies
Primary plus Ratio
secondary of secondary
recovery to primary
Secondary recovery etficiency recovery
method Lithology State (% OOIP) efficiency
Pattern waterflood Sandstone California 35 0.33
Louisiana 51 0.40
Oklahoma 28 0.62
Texas 38 0.50
Wyoming 45 0.89
Pattern waterflood Carbonates Texas 32 1.05
Edge water injection Sandstone Louisiana 55 0.33
Texas 56 0.64
Gas cap injection Sandstone California 44 0.48
Texas 43 0.23
From References 239 and 243.