Changes

===Fault sealing characteristics===

===Fault sealing characteristics===

The map patterns of oil-water and gas-oil contacts are important features that define field geometry. Common or separate oil-water contacts and gas-oil contacts in separate fault blocks will define sealing and nonsealing faults. The sealing characteristics of faults can also be gauged from the mud weights used during drilling or the production data from the well after completion. These data can be plotted on the maps and sections. A special type of section is the fault plane section of Allan<ref name=Allan_1989>Allan, V. S., 1989, [http://archives.datapages.com/data/bulletns/1988-89/data/pg/0073/0007/0800/0803.htm Model for hydrocarbon migration and entrapment within faulted structures]: AAPG Bulletin, v. 73, p. 803-811,</ref> drawn within the plane of a single fault showing the positions of key reservoir and seal beds on either side of the fault and their contacts against one another across the fault ([[:Image:[[File:Evaluating-structurally-complex-reservoirs_fig7.png|Figure 7]]). This type of section allows the interpreter to perceive top seal and cross fault seal potential and pill points and to identify undrilled prospective fault blocks. Fault plane sections may have to be drawn in many different sections, particularly where faults cross-cut or splay off one another.<ref name=Allan_1989></ref><ref name=Downey_1984>Downey, M. W., 1984, [http://archives.datapages.com/data/bulletns/1984-85/data/pg/0068/0011/1750/1752.htm Evaluating seals for hydrocarbon accumulations]: AAPG Bulletin, v. 68, p. 1752-1763.</ref> <ref name=Smith_1966>Smith, D. A., 1966, [http://archives.datapages.com/data/bulletns/1965-67/data/pg/0050/0002/0350/0363.htm Theoretical considerations of sealing and nonsealing faults]: AAPG Bulletin, v. 50, p. 363-374.</ref> <ref name=Smith_1980>Smith, D. A., 1980, [http://archives.datapages.com/data/bulletns/1980-81/data/pg/0064/0002/0100/0145.htm Sealing and nonsealing faults in Louisiana Gulf Coast salt basin]: AAPG Bulletin, v. 64, p. 145-172.</ref>

The map patterns of oil-water and gas-oil contacts are important features that define field geometry. Common or separate oil-water contacts and gas-oil contacts in separate fault blocks will define sealing and nonsealing faults. The sealing characteristics of faults can also be gauged from the mud weights used during drilling or the production data from the well after completion. These data can be plotted on the maps and sections. A special type of section is the fault plane section of Allan<ref name=Allan_1989>Allan, V. S., 1989, [http://archives.datapages.com/data/bulletns/1988-89/data/pg/0073/0007/0800/0803.htm Model for hydrocarbon migration and entrapment within faulted structures]: AAPG Bulletin, v. 73, p. 803-811,</ref> drawn within the plane of a single fault showing the positions of key reservoir and seal beds on either side of the fault and their contacts against one another across the fault ([[:Image:Evaluating-structurally-complex-reservoirs_fig7.png|Figure 7]]). This type of section allows the interpreter to perceive top seal and cross fault seal potential and pill points and to identify undrilled prospective fault blocks. Fault plane sections may have to be drawn in many different sections, particularly where faults cross-cut or splay off one another.<ref name=Allan_1989></ref><ref name=Downey_1984>Downey, M. W., 1984, [http://archives.datapages.com/data/bulletns/1984-85/data/pg/0068/0011/1750/1752.htm Evaluating seals for hydrocarbon accumulations]: AAPG Bulletin, v. 68, p. 1752-1763.</ref> <ref name=Smith_1966>Smith, D. A., 1966, [http://archives.datapages.com/data/bulletns/1965-67/data/pg/0050/0002/0350/0363.htm Theoretical considerations of sealing and nonsealing faults]: AAPG Bulletin, v. 50, p. 363-374.</ref> <ref name=Smith_1980>Smith, D. A., 1980, [http://archives.datapages.com/data/bulletns/1980-81/data/pg/0064/0002/0100/0145.htm Sealing and nonsealing faults in Louisiana Gulf Coast salt basin]: AAPG Bulletin, v. 64, p. 145-172.</ref>

==See also==

==See also==