This report is preliminary and has not been reviewed for conformity with U. S. Geo'ogical Survey editorial standards (or with the North American Stratigraphic Code). Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U. S. Government. INTRODUCTION Predicting the gas:oil ratio (GOR) of a petroleum play or prospect is important in evalu...

Oil shales are developed in the Shale Member of Middle Jurassic Shimengou Formation Qaidam Basin, China. The oil can be classified into three quality groups (low-, medium-, and high-quality shales) through a comprehensive analysis protocol that includes Rock-Eval pyrolysis, total organic carbon (TOC) content, proximate analysis, gas chromatography-mass spectrometry (GC-MS), X-ray diffraction (X...

Ditch samples from AP-4, ER-51 and UK-2 offshore Niger Delta were subjected to biostratigraphic organic geochemical analyses which entail foraminiferal, palynological, Spore Colour Index (SCI), Rock-Eval Pyrolysis Fourier Transform Infrared Spectroscopy (FTIR) analyses. The results have established N19 N17; N17, N16 N15; N9 N8 biozones; P600 P700 palynological zones. dominance of palynomaceral ...

In situ shale or kerogen oil production is a promising approach to developing vast resources and increasing world energy demand. this study, cyclic subcritical water injection in was investigated laboratory conditions as method for retorting. Fifteen non-extracted samples from Bazhenov Formation Russia (98 °C 23.5 MPa reservoir conditions) were hydrothermally treated at 350 25 semi-open system ...

The Cenomanian Mata Amarilla Formation (MAF) in southern Patagonia (~55° S paleolatitude, Austral-Magallanes Basin, Argentina) is composed mainly of stacked fluvial deposits with intercalated paleosols, which document environments at high-paleolatitudes the Southern Hemisphere. We performed a multiproxy study paleosols and sediments MAF order to (1) understand composition soil- sediment-derived...

Even being the more studied of interior basins Northeast Brazil, Araripe Basin still lacks research in organic geochemistry designed to support interpretations depositional systems and conditions formation. This work aims investigate behavior evaporites shales from Santana Group (Lower Cretaceous), as well discuss their role evolution its systems. A total 23 samples, 17 six evaporites, were col...

Abstract In this study, we combined the geochemical characteristics based on Rock-Eval pyrolysis and gas chromatography – mass spectrometry (GC–MS) results with facies analysis. These surveys were conducted within grey to black claystones/mudstones intervals of Podil’tsi Kokhanivka formations, related Pliensbachian Toarcian–Bathonian ages, respectively. The revealed that Formation contains mixe...

The Bathonian Ore-Bearing Clay Formation, outcropping in the Gnaszyn open-pit mine at Częstochowa (Poland), includes several horizons of abundant iron carbonate concretions . cores concretionary bodies commonly contain organic matter (OM), dominated by fragments wood. These particles usually display well-preserved primary structures and occur rarely as more deformed and/or completely degraded f...

Lithofacies are the fundamental geological units for shale oil and gas exploration development, soluble organic matter (SOM) is most similar to crude in composition. Both aspects attract our attention interpretation of SOM different lithofacies, which can provide direct evidence predict “sweet spots”. Here, twenty-five samples were collected from Eocene Shahejie Formation Dongying Sag subjected...