Metal compounds and petroleogenesis

Conference · Thu Jan 01 04:00:00 EST 1976 · Prepr., Div. Pet. Chem., Am. Chem. Soc.; (United States)

OSTI ID:7308149

Sugihara, J M; Branthaver, J F

The notion that chlorophyll a is the prime progenitor of petroporphyrins has been widely accepted. However, recent advances in the characterization of petroporphyrins have added complications, requiring additional processes for the transition to be possible. Among these are: the need for partial conversion of phyllo-type petroporphyrins (or their precursors) into etio- and rhodo-types and dealkylation and transalkylation among all three types to form homologous series by mechanisms providing for appreciable selectivity. Another recent experimental finding demonstrates that the ratio of vanadium to nickel contents in a given crude is much the same for the metalloporphyrins as for the nonporphyrin metal compounds, although vanadium to nickel ratios vary widely from crude to crude. Such evidence suggests that metalloporphyrins and nonporphyrin metal compounds derive metals from the same sources, either in a competitive fashion or one from the other. Nonporphyrin metal compounds are found only in the asphaltenes, primarily in the inner-core portion. It is difficult to rationalize how such material could have migrated. Should then this fraction be formed in the reservoir, metalloporphyrins may also be so introduced, both by microbiological processes. This scheme would obviate the need to presume partial conversion of phyllo-type porphyrins to the other two types. Formation of homologous series would logically follow.

• Research Organization: North Dakota State Univ., Fargo
• OSTI ID: 7308149
• Conference Information: Journal Name: Prepr., Div. Pet. Chem., Am. Chem. Soc.; (United States) Journal Volume: 21:3
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
BIOLOGICAL MATERIALS
CARBOXYLIC ACIDS
CHELATES
CHEMICAL REACTIONS
COMPLEXES
DEALKYLATION
DIAGENESIS
GEOLOGIC DEPOSITS
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
MICROORGANISMS
NICKEL COMPOUNDS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANOMETALLIC COMPOUNDS
PETROLEUM DEPOSITS
PORPHYRINS
RESOURCES
TRANSITION ELEMENT COMPOUNDS
VANADIUM COMPOUNDS