Emplacement dynamics of a complex thick mafic intrusion revealed by borehole image log facies analyses: Implications for fluid migration in the Parnaíba Basin petroleum system, Brazil

Fornero, Sofia Alves; Millett, John; Lima, Evandro Fernandes de; Jesus, Candida Menezes de; Bevilaqua, Leandro A.; Marins, Gabriel Medeiros

doi:10.1016/j.marpetgeo.2023.106378

Cited by 3 publications

(1 citation statement)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Building upon this, the study of the composition, temperature-pressure conditions, fluid environments, and origins of fluids in calcite veins can elucidate fluid activity in the overlapping basin (Cao et al, 2010;Nomura et al, 2014;Jia et al, 2022;Rddad et al, 2022;Wei et al, 2023). It provides evidence for the migration of fluids within source rocks and reservoirs and, to some extent, indicates the geological fluid activity patterns and the influence of structural activity on fluid movement (Yu et al, 2017;Jaya et al, 2021;Zhu et al, 2022;Fornero et al, 2023). The Frontiers in Earth Science 03 frontiersin.org fluid inclusions in calcite veins preserve information about temperature, pressure, fluid type, and composition during mineralization, making them a crucial source of information for understanding the timing, temperature, pressure, and processes of oil and gas accumulation (Wang et al, 2020;Ping et al, 2023;Song et al, 2023;Zhou et al, 2023) This study focuses on the northern thrust fault zone of the Fuman Oilfield, utilizing analyses such as petrographic examination of calcite vein rock phases, fluorescence spectroscopy of oil inclusions, micro-area trace element analysis, Sr isotope analysis, micro-thermometry, and U-Pb isotope dating.…”

Section: Introductionmentioning

confidence: 97%

Hydrocarbon fluid evolution and accumulation process in ultradeep reservoirs of the northern Fuman Oilfield, Tarim Basin

Wang,

Zhang,

Chen

et al. 2024

Front. Earth Sci.

View full text Add to dashboard Cite

Marine deep Ordovician reservoirs are significantly controlled by strike-slip fault zones, which govern reservoir fluid evolution during various activity periods. Such fluid evolution elucidates the process underpinning ultra-deep oil and gas accumulation and delineates the pivotal role of strike-slip fault zones in hydrocarbon aggregation. This method can improve the understanding of the mechanism of hydrocarbon accumulation in deep to ultradeep carbonate rocks. The findings indicate that the Ordovician reservoirs in the northern thrust fault zone of the Fuman Oilfield predominantly exhibit two stages of calcite vein formation. The distribution patterns of rare earth elements and Sr isotope characteristics suggest that both stages of vein formation were sourced from Middle to Lower Ordovician marine strata, with no evidence of oxidizing fluid infiltration. This indicates that late-stage oil and gas charging in deep-ultradeep formations has good sealing properties. In these calcite veins, early-, middle-, and late-stage fluid inclusions were primarily entrapped. By examining the development of primary oil inclusions and combining the U‒Pb isotope data of host minerals, this study confirms the occurrence of three stages of oil and gas charging in the deep Ordovician strata of the northern thrust fault zone in the Fuman Oilfield. These stages correspond to approximately 459 ± 7.2 Ma (mid-Caledonian), 348 ± 18 Ma (early Permian), and 268 Ma (late Permian). The key accumulation period of oil and gas reservoirs in the study area is the middle and late Caledonian, and there is a good correspondence between oil and gas charging and fault activity.

show abstract

Section: Introductionmentioning

confidence: 97%

Hydrocarbon fluid evolution and accumulation process in ultradeep reservoirs of the northern Fuman Oilfield, Tarim Basin

Wang,

Zhang,

Chen

et al. 2024

Front. Earth Sci.

View full text Add to dashboard Cite

show abstract

Seismic interpretation of the Mero Field igneous rocks and its implications for pre- and post-salt CO2 generation – Santos Basin, offshore Brazil

Oliveira,

Penna,

Rancan

et al. 2024

Marine and Petroleum Geology

View full text Add to dashboard Cite

Hydrocarbon Accumulation and Overpressure Evolution in Deep–Ultradeep Reservoirs in the Case of the Guole Area of the Tarim Basin

Qiao,

Zhang,

Wang

et al. 2024

Minerals

View full text Add to dashboard Cite

Usually, deep oil and gas accumulation is often controlled by strike–slip faults. However, in the Tarim Basin, deep Ordovician oil and gas accumulations are also found in areas far from the fault zone. The process of oil and gas accumulation in deep reservoirs far from strike–slip fault zones is still unclear at present. The source and evolution of Ordovician fluids were analyzed using inclusion geochemical methods and the U–Pb dating technique. The analysis of rare earth elements and carbon–oxygen–strontium isotopes in the reservoirs showed that the reservoirs were weakly modified by diagenetic fluid. The fluid was derived from the fluid formation during the same period as the seawater, and no oxidizing fluid invaded the reservoir. The late oil and gas reservoirs had good sealing properties. The U–Pb dating results combined with homogenization temperature data revealed that the first-stage oil was charged during the Late Caledonian Period, and the second-stage natural gas was charged during the Middle Yanshanian Period. The evolution of the paleo-pressure showed that the charging of natural gas in the Middle Yanshanian was the main reason for the formation of reservoir overpressure. The strike–slip fault zone was basically inactive in the Middle Yanshanian. During this period, the charged natural gas mainly migrated to the reservoir along the unconformity surface and the open strike–slip fault zone in the upper part of the Ordovician reservoir. The source of the fluid shows that the reservoir in the late stage had good sealing properties, and there was no intrusion of exogenous fluid. The overpressure in the reservoir is well preserved at present.

show abstract

Emplacement dynamics of a complex thick mafic intrusion revealed by borehole image log facies analyses: Implications for fluid migration in the Parnaíba Basin petroleum system, Brazil

Cited by 3 publications

References 47 publications

Hydrocarbon fluid evolution and accumulation process in ultradeep reservoirs of the northern Fuman Oilfield, Tarim Basin

Hydrocarbon fluid evolution and accumulation process in ultradeep reservoirs of the northern Fuman Oilfield, Tarim Basin

Seismic interpretation of the Mero Field igneous rocks and its implications for pre- and post-salt CO2 generation – Santos Basin, offshore Brazil

Hydrocarbon Accumulation and Overpressure Evolution in Deep–Ultradeep Reservoirs in the Case of the Guole Area of the Tarim Basin

Contact Info

Product

Resources

About