scholarly journals Organic geochemistry of black shales, marlstones, and oils of Middle Pennsylvanian rocks from the northern Denver and southeastern Powder River basins, Wyoming, Nebraska, and Colorado

1992 ◽  
Keyword(s):  
Organic Geochemistry ◽  
River Basins ◽  
Black Shales

scholarly journals Geochemical Considerations from the Carboniferous Unconventional Petroleum System of SW Iberia

Minerals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 811
Author(s):  
Gabriel A. Barberes ◽  
Rui Pena dos Reis ◽  
Nuno L. Pimentel ◽  
André L. D. Spigolon ◽  
Paulo E. Fonseca ◽  
...  
Keyword(s):  
Random Distribution ◽  
Thermal Evolution ◽  
Organic Geochemistry ◽  
Black Shales ◽  
Petroleum System ◽  
Point Of View ◽  
Gas Reservoir ◽  
Thermal Maturation ◽  
Petrographic Analyses ◽  
Rock Eval

The Baixo Alentejo Flysch Group (BAFG) is an important stratigraphic unit that covers over half of the South Portuguese Zone (SPZ) depositional area, and it is composed by three main tectono-stratigraphic units: the Mértola, Mira, and Brejeira formations. All of these formations contain significant thicknesses of black shales and have several wide areas with 0.81 wt.%, 0.91 wt.%, and 0.72 wt.% average total organic carbon (TOC) (respectively) and thermal maturation values within gas zones (overmature). This paper is considering new data from classical methods of organic geochemistry characterization, such as TOC, Rock–Eval pyrolysis, and organic petrography, to evaluate the unconventional petroleum system from the SPZ. A total of 53 samples were collected. From the stratigraphical point of view, TOC values seem to have a random distribution. The Rock–Eval parameters point out high thermal maturation compatible with gas window (overmature zone). The samples are dominated by gas-prone extremely hydrogen-depleted type III/IV kerogen, which no longer has the potential to generate and expel hydrocarbons. The petrographic analyses positioned the thermal evolution of these samples into the end of catagenesis to metagenesis (wet to dry gas zone), with values predominantly higher than 2 %Ro (dry gas zone). The presence of thermogenic hydrocarbon fluids characterized by previous papers indicate that the BAFG from SPZ represents a senile unconventional petroleum system, working nowadays basically as a gas reservoir.

The organic geochemistry of the Eocene–Oligocene black shales from the Lunpola Basin, central Tibet

2014 ◽  
Vol 79 ◽  
pp. 468-476 ◽  
Author(s):  
Tao Sun ◽  
Chengshan Wang ◽  
Yi Duan ◽  
Yalin Li ◽  
Bin Hu
Keyword(s):  
Organic Geochemistry ◽  
Black Shales ◽  
Central Tibet

SOURCE ROCK POTENTIAL AND ORGANIC GEOCHEMISTRY OF CENOMANIAN-TURONIAN BLACK SHALES, WESTERN TAURUS, SW TURKEY

2010 ◽  
Vol 33 (4) ◽  
pp. 355-369 ◽  
Author(s):  
R. Kara-Gülbay ◽  
T. S. Yurtsever ◽  
S. Korkmaz ◽  
I. H. Demirel
Keyword(s):  
Source Rock ◽  
Organic Geochemistry ◽  
Black Shales ◽  
Sw Turkey
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