Results 11 to 20 of about 2,318 (188)

Reconstructing large‐scale karst paleogeomorphology at the top of the Ordovician in the Ordos Basin, China: Control on natural gas accumulation and paleogeographic implications

open access: yesEnergy Science & Engineering, 2019
Karstification in carbonate successions has an important influence on hydrocarbon accumulation. Taking the Ordos Basin, currently the largest petroliferous basin in China, as an example, this study examines the large‐scale, long‐term (~120 Myr ...
Di Xiao   +6 more
doaj   +2 more sources

Influence of sediments burying the discharge area of a karst aquifer on the groundwater flow field—Numerical testing of conceptual models

open access: yesHydrological Processes, Volume 37, Issue 12, December 2023., 2023
The study's simulations reveal that sediment coverage has a significant impact on karst aquifer drainage. A thin layer of highly permeable sediments can considerably reduce conduit outlet discharge, while an impervious sediment cover can completely block the outlet, potentially leading to the emergence of new conduits and springs.
Marc Ohmer   +2 more
wiley   +1 more source

Xenorhinos bhatnagari sp. nov., a new, nasal‐emitting trident bat (Rhinonycteridae, Rhinolophoidea) from early Miocene forests in northern Australia

open access: yesThe Anatomical Record, Volume 306, Issue 11, Page 2693-2715, November 2023., 2023
Abstract A new Old World trident bat (Rhinonycteridae) is described from an early Miocene cave deposit in the Riversleigh World Heritage Area, northwestern Queensland, Australia. Living rhinonycterids comprise a small family of insect‐eating, nasal‐emitting rhinolophoid bats from Africa, Madagascar, Seychelles, the Middle East, and northern Australia ...
Suzanne J. Hand   +3 more
wiley   +1 more source

Microgravity Monitoring in Fractured‐Vuggy Carbonate Reservoirs

open access: yesGeofluids, Volume 2023, Issue 1, 2023., 2023
With the development of Tahe Oilfield entering the high water cut stage, gas channeling occurs in fractured‐vuggy system during nitrogen injection, resulting in some inefficient wells. To improve the development effect of gas flooding, how to define the distribution of fracture, vuggy, and remaining oil has become one of the urgent problems to be ...
Chunhui Du   +5 more
wiley   +1 more source

Diagenetic Evolution of Marine Carbonate Reservoirs: A Case Study from M51-2 Submember of Middle Ordovician Majiagou Formation in SE Ordos Basin, China

open access: yesGeofluids, Volume 2023, Issue 1, 2023., 2023
In the Yan’an gas field, southeast of Ordos Basin, the discovered natural gas reserves are 114 billion cubic meters. Highly productive gas reservoirs were formed in paleokarst. By using 164 samples from 27cores, the geochemical study of diagenetic evolution was carried out, and the relationship between different diagenesis environments was discussed by
Haiyan Wu   +10 more
wiley   +1 more source

Effects of the Pliensbachian–Toarcian Boundary Event on Carbonate Productivity of a Tethyan Platform and Slope

open access: yesPaleoceanography and Paleoclimatology, Volume 37, Issue 5, May 2022., 2022
Abstract We explore the effects of the Pliensbachian–Toarcian Boundary Event (P–ToBE) on tropical carbonate productivity in the interior to margin and slope of the Venetian Platform (Northern Italy). We document the P–ToBE for the first time in the shallow‐water platform margin, and we bio‐ and chemostratigraphically tie it to transgressive/regressive ...
Sarah Fleischmann   +4 more
wiley   +1 more source

Review of Modeling Approaches to Groundwater Flow in Deformed Carbonate Aquifers

open access: yesGroundwater, Volume 59, Issue 3, Page 334-351, May/June 2021., 2021
Abstract We discuss techniques to represent groundwater flow in carbonate aquifers using the three existing modeling approaches: equivalent porous medium, conduit network, and discrete fracture network. Fractures in faulted stratigraphic successions are characterized by dominant sets of sub‐vertical joints.
Giacomo Medici   +3 more
wiley   +1 more source

Early Paleozoic Extension‐Compression Transition and Formation of a Paleo‐Oil Reservoir System in the NW Sichuan Basin: Implications for Deeply Buried Hydrocarbon Accumulation

open access: yesGeofluids, Volume 2021, Issue 1, 2021., 2021
Owing to multiple tectonic events after the Late Triassic, the northern segment of the western Sichuan depression (NSWSCD) has a complex geological history of significant uplift and deeply buried. With abundant oil and gas play in the NSWSCD, the study of paleo‐oil reservoir systems and early hydrocarbon accumulation in this area is of great ...
Xiao Liang   +7 more
wiley   +1 more source

Comparative Study on the Reservoir Characteristics and Development Technologies of Two Typical Karst Weathering‐Crust Carbonate Gas Reservoirs in China

open access: yesGeofluids, Volume 2021, Issue 1, 2021., 2021
Carbonate reservoirs are the main reservoir types in China, which occupy the large ratio of reserves and production at present. The high‐efficiency development of carbonate reservoirs is of great significance to assure the stability of national energy supply.
Haijun Yan   +10 more
wiley   +1 more source

Tectono-Sedimentary Evolution of the Madrid Basin (Spain) during the Late Miocene: Data from Paleokarst Profiles in Diagenetically-Complex Continental Carbonates

open access: yesGeosciences, 2020
An intra-Vallesian (Upper Miocene) paleokarst developed at the top of the Intermediate Miocene Unit in the continental intracratonic Madrid Basin is recognized.
Juan Carlos Cañaveras   +4 more
doaj   +1 more source

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