Changes

The sponge coring system consists of a conventional core barrel fitted with a series of sponge-lined aluminum inserts ([[:file:conventional-coring_fig2.png|Figure 2]]). The system cuts a relatively small core, 2.5 or 3.25 in. wide and [[length::30 ft]] long. The sponge liner catches oil that “bleeds” out of the rock as the core is pulled (tripped) from the hole. The oil-wet sponge holds oil tightly, while allowing water and gas to move through the sponge and out vent holes drilled in the aluminum liner. Sponge and conventional cores may be cut one after another without making special trips to open the hole, so it is possible to “spot” a sponge core and still acquire larger diameter cores for other analyses.

The sponge coring system consists of a conventional core barrel fitted with a series of sponge-lined aluminum inserts ([[:file:conventional-coring_fig2.png|Figure 2]]). The system cuts a relatively small core, 2.5 or 3.25 in. wide and [[length::30 ft]] long. The sponge liner catches oil that “bleeds” out of the rock as the core is pulled (tripped) from the hole. The oil-wet sponge holds oil tightly, while allowing water and gas to move through the sponge and out vent holes drilled in the aluminum liner. Sponge and conventional cores may be cut one after another without making special trips to open the hole, so it is possible to “spot” a sponge core and still acquire larger diameter cores for other analyses.

[[file:conventional-coring_fig3.png|thumb|{{figure number|3}}Full-closure core catcher. (From <ref name=pt03r49>Whitebay, L. E., 1986, Improved coring and core-handling procedures for the unconsolidated sands of the Green Canyon area, Gulf of Mexico: SPE Paper 15385, 61st Annual Technical Conference and Exhibition, New Orleans, LA, Oct. 5–8.</ref>.)]]

[[file:conventional-coring_fig3.png|thumb|{{figure number|3}}Full-closure core catcher. From Whitebay.<ref name=pt03r49>Whitebay, L. E., 1986, Improved coring and core-handling procedures for the unconsolidated sands of the Green Canyon area, Gulf of Mexico: SPE Paper 15385, 61st Annual Technical Conference and Exhibition, New Orleans, LA, Oct. 5–8.</ref>]]

===Full-closure coring systems===

===Full-closure coring systems===