Results 1 to 10 of about 25,995 (207)

Alkaline diagenesis and its effects on reservoir porosity: A case study of Upper Triassic Chang 7 Member tight sandstone in Ordos Basin, NW China

open access: yesPetroleum Exploration and Development, 2015
Petrologic features, diagenetic processes and origins of different pore types of Upper Triassic Chang 7 (7th member of Yanchang Formation) tight sandstones in the Ordos Basin were analyzed based on cast thin sections, scanning electron microscope (SEM ...
Haihua ZHU   +7 more
doaj   +1 more source

Diagenetic processes in Quaternary fossil bones from tropical limestone caves

open access: yesScientific Reports, 2020
Quaternary fossils from limestone caves bear various diagenetic features due to the complex nature of sedimentary processes. However, few studies have addressed the problem of diagenetic changes in fossils from tropical-wet environments.
Daniel Vieira de Sousa   +4 more
doaj   +1 more source

Reservoir characteristics and genesis of the Lower Ordovician Tongzi Formation in central Sichuan Basin, China

open access: yesFrontiers in Earth Science, 2023
Although the Ordovician petroleum exploration in the Sichuan Basin has been developed slowly for a long time, deepening the research of reservoir characteristics and genesis is still a robust way to accelerate it.
Li Zhou   +9 more
doaj   +1 more source

Control of oolitic beaches sedimentation and diagenesis on the reservoirs in Feixianguan Formation, northeastern Sichuan Basin

open access: yesPetroleum Exploration and Development, 2012
Based on well correlation, division of sedimentary facies and microfacies, core observation, and analysis of rock thin sections, the authors comparatively analyzed the sedimentation and diagenesis of the oolitic beaches in the Puguang and Yuanba areas of
Yunlan HE   +7 more
doaj   +1 more source

Diagenetic evolution characteristics of Paleogene lacustrine carbonate reservoirs in central Bohai sea, China

open access: yesJournal of Natural Gas Geoscience, 2018
The distribution of high-quality reservoirs in Shahejie Formation of the Shijiutuo Uplift, Central Bohai Sea, is the key factor to determine the oil and gas accumulation.
Zhengxiang Lv   +4 more
doaj   +1 more source

Microfacies Analysis and Depositional Environment of Middle Jurassic Samana Suk Formation, Chichali Nala Section, Surghar Range, Pakistan.

open access: yesInternational Journal of Economic and Environment Geology, 2021
The Middle Jurassic age Samana Suk Formation, exposed in Chichali Nala section of Surghar ranges has been investigated by field work, petrographic study and XRD analysis to understand the microfacies, depositional environment and fault related ...
Imran Ahmad, Said Mukhtar Ahmad, Matee Ullah, Aurangzeb ., Syed Muhammad Waseem Sajjad, NAzir Ul Islam
doaj   +1 more source

Temporal evolution, petrography and composition of dolostones in the Upper Devonian Plavinas Regional Stage, southern Estonia and northern Latvia [PDF]

open access: yesEstonian Journal of Earth Sciences, 2013
The Upper Devonian Plavinas Regional Stage in southern Estonia and northern Latvia is represented by dolostones containing interlayers of dolomitic marlstones and limestones.
Anne Kleesment   +7 more
doaj   +1 more source

Linkage of diagenesis to depositional environments and stratigraphy in the northern part of the Baltic basin [PDF]

open access: yesEstonian Journal of Earth Sciences, 2012
The spatial and temporal distribution of carbonate cementation was investigated in Devonian siliciclastic rocks of the northern part of the Baltic basin, using geochemical (oxygen and carbon stable isotope, microprobe and bulk chemical analyses), optical,
Kristjan Urtson   +5 more
doaj   +1 more source

Sedimentary environment, sequence stratigraphy, diagenesis and geochemistry of the carbonate Ruteh Formation in north of Mahabad section [PDF]

open access: yesJournal of Stratigraphy and Sedimentology Researches, 2019
The Ruteh Formation is the second sedimentary cycle in Alborz basin. The petrography and laboratory studies of these deposits led to the identification of 15 microfacies which were deposited in seven sub-environments including supratidal, intertidal ...
Youssef Mohamaddi Moghaddas   +3 more
doaj   +1 more source

Sedimentological, Diagenetic, and Sequence Stratigraphic Controls on the Shallow to Marginal Marine Carbonates of the Middle Jurassic Samana Suk Formation, North Pakistan

open access: yesJournal of Marine Science and Engineering, 2023
This study presents a thorough analysis of the sedimentology, diagenesis, and sequence stratigraphy of the Middle Jurassic Samana Suk Formation in the Hazara Basin of northern Pakistan.
Shazia Qamar   +5 more
doaj   +1 more source

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