Hydrocarbon source rock characterization and maturity based on rock-eval pyrolysis and vitrinite reflectance of Eocene strata, southern Oregon Coast Range, Douglas and Coos Counties, southwest Oregon

1995 ◽  
Author(s):  
Paul G. Lillis ◽  
T.A. Daws ◽  
M.J. Pawlewicz ◽  
A.R. Niem ◽  
In-Chang Ryu
Keyword(s):  
Source Rock ◽  
Vitrinite Reflectance ◽  
Coast Range ◽  
Hydrocarbon Source Rock ◽  
Oregon Coast Range ◽  
Oregon Coast ◽  
Rock Characterization ◽  
Southwest Oregon ◽  
Rock Eval

scholarly journals Geochemical characteristics and depositional environments of the Narimba Formation source rock, Bass Basin, Australia

2020 ◽  
Vol 10 (8) ◽  
pp. 3207-3225
Author(s):  
Mohamed Ragab Shalaby ◽  
Muhammad Izzat Izzuddin bin Haji Irwan ◽  
Liyana Nadiah Osli ◽  
Md Aminul Islam
Keyword(s):  
Source Rock ◽  
Vitrinite Reflectance ◽  
Depositional Environments ◽  
Geochemical Characteristics ◽  
Type Ii ◽  
Wet Gas ◽  
Kerogen Type ◽  
Rock Characterization ◽  
Rock Eval ◽  
Oil Gas

Abstract This research aims to conduct source rock characterization on the Narimba Formation in the Bass Basin, Australia, which is made of mostly sandstone, shale and coal. The geochemical characteristics and depositional environments have been investigated through a variety of data such as rock–eval pyrolysis, TOC, organic petrography and biomarkers. Total organic carbon (TOC) values indicated good to excellent organic richness with values ranging from 1.1 to 79.2%. Kerogen typing of the examined samples from the Narimba Formation indicates that the formation contains organic matter capable of generating kerogen Type-III, Type-II-III and Type-II which is gas prone, oil–gas prone and oil prone, respectively. Pyrolysis maturity parameters (Tmax, PI), in combination with vitrinite reflectance and some biomarkers, all confirm that all samples are at early mature to mature and are in the oil and wet gas windows. The biomarkers data (the isoprenoids (Pr/Ph), CPI, isoprenoids/n-alkanes distribution (Pr/nC17 and Ph/nC18), in addition to the regular sterane biomarkers (C27, C28 and C29) are mainly used to evaluate the paleodepositional environment, maturity and biodegradation. It has been interpreted that the Narimba Formation was found to be deposited in non-marine (oxygen-rich) depositional environment with a dominance of terrestrial plant sources. All the analyzed samples show clear indication to be considered at the early mature to mature oil window with some indication of biodegradation.

scholarly journals Hydrocarbon Source Rock Potential of the Lacustrine Black Shale Unit, Mamfe Basin, Cameroon, West Africa

2016 ◽  
Vol 5 (2) ◽  
pp. 217 ◽  
Author(s):  
NJOH Olivier Anoh ◽  
NJIE Sarah Mesanga
Keyword(s):  
Organic Matter ◽  
Source Rock ◽  
Black Shale ◽  
Oil And Gas ◽  
Vitrinite Reflectance ◽  
Hydrocarbon Exploration ◽  
Hydrocarbon Source Rock ◽  
Sedimentary Fill ◽  
Kerogen Pyrolysis ◽  
Rock Eval

The potential for conventional and/or unconventional hydrocarbon exploration requires the presence of organic-rich, thermally mature rock units containing oil or gas-prone kerogen. Thick black, organic rich shale intervals are well exposed along roadside cuts and river banks at several localities in the eastern part of the Mamfe Basin. Earlier described as anoxic lake bottom deposits, these fine grained rocks constitute the probable pod of active source rock in this basin and belonging to the middle stratigraphic unit of the three that make up the basin’s sedimentary fill. Samples collected from representative outcrop sections (Etoko mile 21, Bachuo Ntai, and Satom Bridge) in the study area were subjected to geochemical analytic techniques; Total Organic Carbon (TOC), Rock-Eval Pyrolysis and Vitrinite reflectance (%Ro) values were calculated. TOC data obtained range from 1.06% to 16.10% indicating good to excellent hydrocarbon generative potentials, Rock-Eval Pyrolysis data plotted along Kerogen Types I, II and III with oil and gas generative potentials. 4 out of 9 samples fall within the oil window from the calculated %Ro while temperatures corresponding to the peak of kerogen pyrolysis (Tmax) and Production Index (PI) for the 9 samples range from 398oC to 463oC indicating that the organic matter (OM) are immature to post mature.The black shale unit of this part of the basin therefore contains very high amounts of good to excellent quality of thermally matured organic matter which can produce and expel oil and gas respectively.

Geologic map of the Tillamook Highlands, Northwest Oregon Coast Range

1994 ◽  
Author(s):  
R.E. Wells ◽  
P.D. Snavely ◽  
N.S. MacLeod ◽  
M.M. Kelly ◽  
M.J. Parker
Keyword(s):  
Coast Range ◽  
Oregon Coast Range ◽  
Oregon Coast ◽  
Geologic Map

FORMATION AND SEDIMENTATION OF LANDSLIDE-DAMMED LAKES WITHIN SMALL WATERSHEDS OF THE CENTRAL OREGON COAST RANGE

2017 ◽  
Author(s):  
Logan R. Wetherell ◽  
◽  
Lisa L. Ely ◽  
Megan Walsh ◽  
Joshua Roering ◽  
...  
Keyword(s):  
Coast Range ◽  
Oregon Coast Range ◽  
Oregon Coast ◽  
Small Watersheds

QUANTIFYING SEDIMENTATION PATTERNS OF SMALL LANDSLIDE-DAMMED LAKES IN THE CENTRAL OREGON COAST RANGE

2019 ◽  
Author(s):  
Logan R. Wetherell ◽  
◽  
Lisa L. Ely ◽  
Joshua Roering ◽  
Megan Walsh ◽  
...  
Keyword(s):  
Coast Range ◽  
Oregon Coast Range ◽  
Oregon Coast

Tholeiitic and alkalic basalts of the Eocene Siletz River Volcanics, Oregon Coast Range

1968 ◽  
Vol 266 (6) ◽  
pp. 454-481 ◽  
Author(s):  
P. D. Snavely ◽  
N. S. MacLeod ◽  
H. C. Wagner
Keyword(s):  
Coast Range ◽  
Oregon Coast Range ◽  
Oregon Coast ◽  
Alkalic Basalts
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