Page 163 - The Petroleum System From Source to Trap

156 Jordan and Wilson

V1 MOcp VUGcp BR<j> SOIL ZONE- INTENSE DISSOLUTION

VADOSE V2 ···--···-·--·--·---·- ZONE OF MINOR DISSOLUTION
MO<f> VUG cp
{MENISCUS CEMENT MEN+
ZONE of MINOR PENDANT or MICROSTALACTITIC PO+
V3 BP+ WP+
·-·-·-·-··--------·--· CEMENTATION EQUANT CALCITE CEMENT ES+
SOME ARAGONITE DISSOLUTION
FW-PH1 MO<j> VUG cp neomorphism of fossils and lime mud
FRE SH- {BLADED ISOPACHOUS RIM CEMENT IR+
ZONE Of
FW-PH2 BP+ WP+ BR+ CEMENTATION ABUNDANT EQUANT CALCITE CEMENT ES+
SYNTAXIALOVERGROWTH CEMENT
SO+
WATER ----·--··-----·
{very little cementation
FW-PH3 little or no dissolution
PHREATIC ---·-·-.. ·--·-·-·-··· diagenetically stabilization of hi-mag
inactive zone
FW-PH4 calcite and aragonite
··-·-·-·-··--· .. -·-.. ··--·--"" neomorphism of aragonite
.
. {aragonite to calcite
dolomite stability in 5-50% seawater
MO <j> mtnor neomorphiSm hi-mag calcite to calcite
MIXING MZ-1 BP+ WP+ DISSOLUTION OF ARAGONITE (?)
c
MINOR CEMENTATION-&���b c� � � �i� � � � � � T M �� :
E
ZONE c
MZ-2 ·--·--··-----·--·-- no neomorphism -- no dissolution
BP+
MINOR CEMENTATION by ISOPACHOUS RIM CEMENT IR+
{ARAGONITE NEEDLES FIB+
M-PH1 BP+ WP+ ZONE OF CEMENTATION FIBROUS RIM CEMENT FIB IR+
MIC+
MICRITIC HMC CEMENT
MARINE zone BOTRYOIDAL "CEMENT" BOn F
M-PH2 -·-·-·----·---·--··--
PHREATIC of fj R
M-PH3 micritization 0 FR <j> and/or FR+ A
-·--··----·-·-·-·-· .. ·-·---·
c
ZONE OF CEMENTATION
by BLOCKY CALCITE CEMENT (SPAR) ss+ T
SHALLOW ··-·-z_7 FORMATION OF WEAK ORGANIC ACIDS u
BP+ WP+ MO+
SUB SURFACE VUG+ FR+ BR+ s
T
THERMAL MATURATION OF KEROGEN y R
TO VUG <j> (?) or MIGRATION of { liquid hydrocarbons L I
methane
o-w-
DEE P BP cp SE (?) OIL and GAS carbon dioxide L N
I
SUB SURFACE over-pressuring and high temperatures T
DEWATERING OF SHALES E G
L-z ____
s
Figure 7.16.1dealized vertical distribution of primary and dissolution porosity and calcite cementation. The vertical profile
showing porous and tight zones is taken through a middle shelf high on a typical shelf to basin profile (see Figure 7.15 for
the position of this column). t, porosity; + , cement. The bold type in all caps indicates phenomena associated with porosity
development or preservation; normal type in all caps indicates phenomena associated with cementation.
Ebanks, W. J. Jr., 1975, Holocene carbonate sedimentation and eds., Carbonate Petroleum Reservoirs: Heidelberg,
diagenesis, Ambergris Cay, Belize, inK. F. Wantland and Springer-Verlag, p. 455-470.
W. C. Pusey III, eds., Belize shelf-carbonate sediments, Feazel, C. T., and R. A. Schatzinger, 1985, Prevention of
clastic sediments, and ecology: AAPG Studies in Geology carbonate cementation in petroleum reservoirs, in N.
2, p. 234-296. Schneidermann and P. M. Harris eds., SEPM Special Publi­
Embry, A. F., and Klovan, J. E., 1971, A Late Devonian reef cation36, p. 97-106.
tract on Northwestern Banks, Northwest Territories: Flugel, E., 1982, Microfacies Analysis of Limestones: New
Canadian Petroleum Geology Bulletin, v. 19, p. 730-781. York, Springer-Verlag, 633 p.
Enos, P., 1985, Cretaceous debris reservoirs, Poza Rica field, Halbouty, M. T., ed., 1992, Giant oil and gas fields of the
Veracruz, Mexico, in P. 0. Roehl and P. W. Choquette, decade 1978-1988: AAPG Memoir 54, 526 p.