Results 1 to 10 of about 700 (192)
Petroleum Exploration and Development, 2013 Based on the research of unconformity type and distribution, and restoration of structural feature of paleo-uplift in the late sedimentary period of Sinian Dengying Formation, the evolution of paleokarst landform and karstic hydrodynamic field during ...
Wangshui Hu, Guangya Zhang
exaly +4 more sources
Open Geosciences, 2017 The Ordovician paleokarst reservoirs in the Tahe oilfield, with burial depths of over 5300 m, experienced multiple phases of geologic processes and exhibit strong heterogeneity. Core testing can be used to analyse the characteristics of typical points at
Fei Tian, Xinbian Lu, Debin Yang
exaly +4 more sources
Formation environments and mechanisms of multistage paleokarst of Ordovician carbonates in Southern North China Basin [PDF]
Scientific Reports, 2021 With the reduction of oil and gas reserves and the increase of mining difficulty in Northern China, the carbonate rocks in Southern North China Basin are becoming a significant exploration target for carbonate reservoirs.
Haitao Zhang +3 more
doaj +2 more sources
Petroleum Exploration and Development, 2016 Based on the analysis of deposition and tectonism, “residual thickness method” is used to restore the paleokarst landform of Middle Permian Maokou Formation in northwestern Sichuan Basin.
Di Xiao, Xiucheng Tan, Jirong Xie
exaly +4 more sources
Porosity and permeability of karst carbonate rocks along an unconformity outcrop: A case study from the Upper Dammam Formation exposure in Kuwait, Arabian Gulf [PDF]
Heliyon, 2021 Diagenetic changes are a concern in carbonate petroleum reservoir management. One of the challenges is to determine whether the pore systems are related to diagenesis and/or depositions, and how associated mechanisms affect reservoir quality. The purpose
Fowzia H. Abdullah
doaj +2 more sources
Petroleum Exploration and Development, 2021 Based on analysis of outcrop, drilling, logging and seismic data, and geotectonic background, the lithofacies paleogeography and paleokarst geomorphology of the Middle Permian Maokou Formation in the northwestern Sichuan Basin were reconstructed, and the
Yuan Zhong, Yueming Yang, Di Xiao
exaly +3 more sources
Stable isotopic evidence for increased terrestrial productivity through geological time [PDF]
Scientific ReportsMarine life on Earth is known back to the Archean Eon, when life on land is assumed to have been less pervasive than now. Precambrian life on land can now be tested with stable isotopes because living soil CO2 is isotopically distinct for both carbon and
Gregory J. Retallack, Ilya N. Bindeman
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The first hominin from the early Pleistocene paleocave of Haasgat, South Africa [PDF]
PeerJ, 2016 Haasgat is a primate-rich fossil locality in the northeastern part of the Fossil Hominid Sites of South Africa UNESCO World Heritage Site. Here we report the first hominin identified from Haasgat, a partial maxillary molar (HGT 500), that was recovered ...
AB Leece +7 more
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Speleogenesis and depositional history of paleokarst phreatic caves/cavities; Podgrad, SW Slovenia
Acta Carsologica, 2021 The studied paleokarst corresponds to an uplifted peripheral foreland bulge when Upper Cretaceous diagenetically immature eogenetic carbonates were subaerially exposed, karstified and subsequently overlain by upper Paleocene/lower Eocene palustrine ...
Bojan Otoničar
doaj +1 more source
Frontiers in Earth Science, 2022 As a special type of fracture-cavity carbonate reservoir, fault/fracture-controlled paleokarsts are affected by large strike-slip faults with various storage spaces, irregular geometry, and stochastic spatial distribution, which brings new challenges to ...
Wenbiao Zhang +6 more
doaj +1 more source