Changes

Structural spillage is avoided if trapping geometry is maintained during deformation after charging. Structural closure must be maintained at all times during subsequent deformation. Throws on faults likely to cut the seal at the accumulation should be less than the seal thickness to avoid spillage by juxtaposition across the fault plane.

Structural spillage is avoided if trapping geometry is maintained during deformation after charging. Structural closure must be maintained at all times during subsequent deformation. Throws on faults likely to cut the seal at the accumulation should be less than the seal thickness to avoid spillage by juxtaposition across the fault plane.

Spillage potential can be evaluated by combining geohistory analysis and structural analysis. '''Geohistory analysis''' (combined analysis of burial, thermal, and generation history) of gathering areas for prospects gives the range of charging times for the prospect [essentially the time of generation in nearby gathering areas<ref name=ch11r8>England, W., A., Mann, A., L., Mann, D., M., 1991, [http://archives.datapages.com/data/specpubs/geochem1/data/a037/a037/0001/0000/0023.htm Migration from source to trap], in Merrill, R., K., ed., Source and Migration Processes and Evaluation Techniques: [http://store.aapg.org/detail.aspx?id=436 AAPG Treatise of Petroleum Geology Handbook of Petroleum Geology], p. 23–46.</ref>]). '''Structural analysis''', using balanced structural cross sections as well as cross-cutting and superposition relationships, gives the range of times for trapping geometry formation and failure.

Spillage potential can be evaluated by combining geohistory analysis and structural analysis. '''Geohistory analysis''' (combined analysis of burial, thermal, and generation history) of gathering areas for prospects gives the range of charging times for the prospect [essentially the time of [[Petroleum generation|generation]] in nearby gathering areas<ref name=ch11r8>England, W., A., Mann, A., L., Mann, D., M., 1991, [http://archives.datapages.com/data/specpubs/geochem1/data/a037/a037/0001/0000/0023.htm Migration from source to trap], in Merrill, R., K., ed., Source and Migration Processes and Evaluation Techniques: [http://store.aapg.org/detail.aspx?id=436 AAPG Treatise of Petroleum Geology Handbook of Petroleum Geology], p. 23–46.</ref>]). '''Structural analysis''', using balanced structural cross sections as well as cross-cutting and superposition relationships, gives the range of times for trapping geometry formation and failure.

==See also==

==See also==