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Line 65: − − Figure 4 illustrates the sequence of events associated with diagenetic trap formation. In the example shows the mechanism original trapping with reduced porosity updip as a result of changes facies of grainstone oolitic into calcareous mudstone. + +
Subsurface diagenesis and its relation with diagenetic trap on carbonate rocks reservoir (view source)
Revision as of 16:54, 13 July 2015
, 16:54, 13 July 2015→Identification subsurface diagenesis that form diagenetic trap in carbonate rocks reservoir
Diagenesis below the surface also has a relationship with the migration. When migration occurs early and precedes episodes of tilting or folding it takes prudence on the possible diagenesis trap (Wilson, H.H., 1975, 1977). Migration earlier indicated by some diagenesis carbonate sequences which suffered beforehand as cementation.
Diagenesis below the surface also has a relationship with the migration. When migration occurs early and precedes episodes of tilting or folding it takes prudence on the possible diagenesis trap (Wilson, H.H., 1975, 1977). Migration earlier indicated by some diagenesis carbonate sequences which suffered beforehand as cementation.
[[File:UGM_Subsurface_Fig_4.png|thumb|300px|{{figure number|4}}Establishment of diagenetic trap associated with the initial migration of oil.
[[File:UGM_Subsurface_Fig_4.png|thumb|300px|{{figure number|4}}Establishment of diagenetic trap associated with the initial migration of oil.
(A) The accumulation of hydrocarbons in the stratigraphic trap as a result of loss updip porosity. Calcite cementation happened to overburden contact oil / water. (B) With folding contact of oil / water layer is at end position a reservoir that has no relation with the structure (Aquitaine, 1982)]]
(A) The accumulation of hydrocarbons in the stratigraphic trap as a result of loss updip porosity. Calcite cementation happened to overburden contact oil / water. (B) With folding contact of oil / water layer is at end position a reservoir that has no relation with the structure (Aquitaine, 1982)]]
[[:File:UGM_Subsurface_Fig_4.png|Figure 4]] illustrates the sequence of events associated with diagenetic trap formation. In the example shows the mechanism original trapping with reduced porosity updip as a result of changes facies of grainstone oolitic into calcareous mudstone.
At the contact of oil / water in the reservoir is often precipitate calcite cement extensively. This phenomenon generally occurs in some carbonate reservoir which showed no evidence of cementation except in contact area of oil / water. The calcite cement occurrences associated with the reaction of sulfate reducing bacteria which can be explained in the following reaction (Friedman and Sander, 1978).
At the contact of oil / water in the reservoir is often precipitate calcite cement extensively. This phenomenon generally occurs in some carbonate reservoir which showed no evidence of cementation except in contact area of oil / water. The calcite cement occurrences associated with the reaction of sulfate reducing bacteria which can be explained in the following reaction (Friedman and Sander, 1978).