Correlating organic facies and turbidite facies in a Hoh turbidite sequence (Miocene), Western Olympic Peninsula, Washington
The distribution of organic facies is a function of the environment of deposition. Within each turbidite facies, diverse depositional regimes are present that affect both the preservation and dispersal and organic matter. Proper identification of turbidite facies can lead to a proper prediction of organic content within a particular turbidite facies or turbidite facies association. The type section of the Brown's Point formation, a turbidite sequence within the Hoh rock assemblage, demonstrates the correlation between organic facies and turbidite facies, as defined by E. Mutti and F. Ricci-Lucchi. Turbidite facies can be matched to organic facies throughout the entire 4000 ft (1220 m) thick vertical section. Outer and middle fan turbidite associations have been analyzed and correlated for organic facies lateral continuity. Distribution of organic carbon concentrations and organic carbon type suggests a dominance of terrestrial input. TAI and R/sub 0/ analyses reflect a marginally mature thermal maturation level (R/sub 0/ = 0.5-0.6). Visual kerogen inspection reveals a mixed to structured kerogen with a predominance of type III/IV over type IV kerogen. Overall, maturation indices suggest a gas source with poor source potential for oil. Individual turbidite facies display a significant relationship to the amount, type, and level of maturation of organic matter present within each facies and facies association. Frontier basin analysis of turbidite sequences can be expedited by proper field identification of turbidite facies and subsequent geochemical analysis of the content, type, and maturation level of the organic matter present within each turbidite facies.
- Research Organization:
- Univ. of Idaho, Moscow
- OSTI ID:
- 5866451
- Report Number(s):
- CONF-850322-
- Journal Information:
- Am. Assoc. Pet. Geol., Bull.; (United States), Journal Name: Am. Assoc. Pet. Geol., Bull.; (United States) Vol. 69:2; ISSN AAPGB
- Country of Publication:
- United States
- Language:
- English
Similar Records
Thermal Maturity and Organic Facies of Devonian Shales from Selected Wells
Organic facies and thermal maturity of sedimentary rocks in the National Petroleum Reserve in Alaska
Related Subjects
020200* -- Petroleum-- Reserves
Geology
& Exploration
BITUMINOUS MATERIALS
CARBONACEOUS MATERIALS
CARBONATE ROCKS
CORRELATIONS
FEDERAL REGION X
KEROGEN
MACERALS
MATERIALS
MATURATION
NORTH AMERICA
OPTICAL PROPERTIES
ORGANIC MATTER
PHYSICAL PROPERTIES
RESERVOIR ROCK
ROCKS
SEDIMENTARY ROCKS
USA
WASHINGTON