scholarly journals Heat Flow in the Campos Sedimentary Basin and Thermal History of the Continental Margin of Southeast Brazil

2014 ◽  
Vol 2014 ◽  
pp. 1-19 ◽  
Author(s):  
Roberta A. Cardoso ◽  
Valiya M. Hamza
Keyword(s):  
Heat Flow ◽  
Continental Margin ◽  
High Heat ◽  
Geothermal Field ◽  
Peak Oil ◽  
Southeast Brazil ◽  
Campos Basin ◽  
Oil Generation ◽  
High Gradients ◽  
History Of

Bottom-hole temperatures and physical properties derived from geophysical logs of deep oil wells have been employed in assessment of the geothermal field of the Campos basin, situated in the continental margin of southeast Brazil. The results indicate geothermal gradients in the range of 24 to 41°C/km and crustal heat flow in the range of 30 to 100 mW/m2 within the study area. Maps of the regional distributions of these parameters point to arc-shaped northeast-southwest trending belts of relatively high gradients and heat flow in the central part of the Campos basin. This anomalous geothermal belt is coincident with the areas of occurrences of oil deposits. The present study also reports progress obtained in reconstructing the subsidence history of sedimentary strata at six localities within the Campos basin. The results point to episodes of crustal extension with magnitudes of 1.3 to 2, while extensions of subcrustal layers are in the range of 2 to 3. Thermal models indicate high heat flow during the initial stages of basin evolution. Maturation indices point to depths of oil generation greater than 3 km. The age of peak oil generation, allowing for variable time scales for cooling of the extended lithosphere, is found to be less than 40 Ma.

Geochemical characterization of the source rock intervals, Beni-Suef Basin, West Nile Valley, Egypt

2021 ◽  
Vol 13 (1) ◽  
pp. 1536-1551
Author(s):  
Nader A. A. Edress ◽  
Saudy Darwish ◽  
Amir Ismail
Keyword(s):  
Heat Flow ◽  
Source Rock ◽  
High Heat ◽  
Source Rocks ◽  
Nile Valley ◽  
Peak Oil ◽  
Burial History ◽  
Depth Limit ◽  
Oil Generation ◽  
Rock Depth

Abstract Geochemical and lithological investigations in the WON C-3X well record five organic-matter-rich intervals (OMRIs) of effective source rocks. These OMRIs correspond to moderate and good potentials. Two of these intervals occurred within the L-Kharita member of the Albian age represent 60.97% of the entire Albian thickness. The rest of OMRIs belongs to the Abu-Roash G and F members of the Late Cenomanian–Santonian age comprising 17.52 and 78.66% of their total thickness, respectively. The calculated heat flow of the studied basin is high within the range of 90.1–95.55 mW/m2 from shallower Abu-Roash F to deeper L-Kharita members. This high-heat flow is efficient for shallowing in the maximum threshold expulsion depth in the studied well to 2,000 m and active source rock depth limit to 2,750 m. Thermal maturity and burial history show that the source rock of L-Kharita entered the oil generation from 97 Ma till the late oil stage of 7.5 Ma, whereas the younger Abu-Roash G and F members have entered oil generation since 56 Ma and not reached peak oil yet. Hence, the source rock intervals from Abu-Roash F and G are promising for adequate oil generation.

CONODONT COLOUR ALTERATION, THERMAL MATURATION AND THE GEOTHERMAL HISTORY OF THE CANNING BASIN, WESTERN AUSTRALIA

1984 ◽  
Vol 24 (1) ◽  
pp. 243 ◽  
Author(s):  
Robert S. Nicoll ◽  
John D. Gorter
Keyword(s):  
Heat Flow ◽  
Western Australia ◽  
Horizontal Distribution ◽  
Petroleum Exploration ◽  
Northern Margin ◽  
Canning Basin ◽  
Thermal Maturation ◽  
Oil Generation ◽  
History Of ◽  
Colour Alteration

Examination of conodont colour alteration (CAI) in samples from more than 40 petroleum exploration wells and extensive outcrop collections along the northern margin of the Lennard Shelf forms the basis for a study of the thermal maturation and geothermal history of the Canning Basin of Western Australia. The thickness of the measured CAI intervals is variable and does not conform to the 1200 m standard of the Appalachian Basin. The CAI interval 1 is thick and indicates a low geothermal gradient in the basin but CAI intervals 1.5 and 2 are thin and indicate higher geothermal gradients. A major thermal event of Miocene Age, associated with the intrusion of the Fltzroy Lamproites in the Fitzroy Graben and Lennard Shelf, may be the source of the increased heat flow and also explain an area of high heat flow in some parts of the Graben and shelf.Using the vertical and horizontal distribution of trends of the CAI intervals it is suggested that over large areas of the basin the oil generation window is restricted to an interval about 1100 m thick and, except where migration has taken place, that liquid hydrocarbons will be restricted to the interval between 1600 and 3000 m. In areas affected by the intrusion of the Fitzroy Lamproites, the top of the oil generation window may be as shallow as 800 m.

scholarly journals Effects of a Cretaceous structural inversion and a postulated high heat flow event on petroleum system of the western Lower Saxony Basin and the charge history of the Apeldorn gas field

2005 ◽  
Vol 84 (1) ◽  
pp. 3-24 ◽  
Author(s):  
J. Kus ◽  
B. Cramer ◽  
F. Kockel
Keyword(s):  
Heat Flow ◽  
Lower Triassic ◽  
High Heat ◽  
Upper Jurassic ◽  
High Heat Flow ◽  
Lower Saxony ◽  
Gas Field ◽  
Free Gas ◽  
Lower Saxony Basin ◽  
History Of

AbstractThermal history and evolution of the Palaeozoic petroleum system of the western Lower Saxony Basin as well as charge history of the Apeldorn gas field was reconstructed using 2-D forward basin modelling software. The Apeldorn gas field is located on an inverted western rim of the Lower Saxony Basin (LSB) and belongs with its relatively anomalous nitrogen content of 73.9 vol. % to one of the most unique gas accumulations in North Germany. Based on thermal calibration studies utilising both, vitrinite reflectance and corrected bottom hole temperatures as calibration parameters, a shallow burial model and an anomalous event of Coniacian high heat flow of 80 to 120 mW/m2was derived. As result, Lower Triassic and younger successions became subjected to slight changes in thermal maturity as opposed to Carboniferous and Permian successions, which show no assessable impact of the high heat flow event on the coalification pattern. The deep burial model in contrary to the shallow burial model is not supported by the structural reconstruction and backstripping in this more marginal setting. According to the modelling results, the key charge of the present Apeldorn gas field began in Tithonian (late Upper Jurassic) during the major phase of rifting in the Lower Saxony Basin. The present Westphalian coal-derived gas accumulations of the Lower Triassic Buntsandstein reservoir were sourced directly from modelled methane pools at top Rotliegend level. The hydrocarbon potential of the Westphalian source rocks became exhausted in Oxfordian (early Upper Jurassic). Reduction of the hydrostatic pressure during the Coniacian high heat flow event together with uplift during the Coniacian-Santonian inversion led to an extensive free gas exsolution. The resulting gas mixture between the exsolved free gas and the Westphalian coal-derived gas reached and saturated Buntsandstein reservoir. The structural trap became destroyed in course of the inversion leading to a sharp decrease of methane and nitrogen saturation.

The Vendian-Early Paleozoic History of the Continental Margin of Eastern Paleogondwana, Paleoasian Ocean, and Central Asian Foldbelt

2003 ◽  
Vol 5 (3) ◽  
pp. 165-184 ◽  
Author(s):  
T. N. Kheraskova ◽  
Yu. A. Volozh ◽  
A. N. Didenko ◽  
V. A. Bush
Keyword(s):  
Continental Margin ◽  
Early Paleozoic ◽  
Paleoasian Ocean ◽  
Central Asian ◽  
History Of

Pre-to-syn-rift tholeiitic magmatism in a transtensive hyperextended continental margin: Onshore and offshore magmatism of the Campos Basin, SE Brazil

2021 ◽  
pp. 103218
Author(s):  
Julio Almeida ◽  
Monica Heilbron ◽  
Eliane Guedes ◽  
Franz Neubauer ◽  
Bernroider Manfred ◽  
...  
Keyword(s):  
Continental Margin ◽  
Campos Basin ◽  
Se Brazil ◽  
Tholeiitic Magmatism

Thermotectonic history of the Maastrichtian reservoir in Campos Basin

2018 ◽  
Vol 93 ◽  
pp. 331-343
Author(s):  
Christie Helouise Engelmann de Oliveira ◽  
Andréa Ritter Jelinek ◽  
Diego Timoteo ◽  
Matthias Bernet
Keyword(s):  
Campos Basin ◽  
History Of

Late quaternary sedimentation and glacial history of the western Svalbard continental margin

1996 ◽  
Vol 133 (3-4) ◽  
pp. 123-156 ◽  
Author(s):  
Espen S. Andersen ◽  
Trond M. Dokken ◽  
Anders Elverhøi ◽  
Anders Solheim ◽  
Ingrid Fossen
Keyword(s):  
Continental Margin ◽  
Late Quaternary ◽  
Glacial History ◽  
History Of

A preliminary model for the erosional history of the onshore continental margin of S.E. Brazil

1993 ◽  
Vol 21 (4) ◽  
pp. 588
Author(s):  
Kerry Gallagher ◽  
Chris Hawkesworth ◽  
Cherry Lewis ◽  
Marta Mantovani
Keyword(s):  
Continental Margin ◽  
Preliminary Model ◽  
History Of
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