Results 51 to 60 of about 279,283 (349)

Petrophysical characterization, BIB-SEM imaging, and permeability models of tight carbonates from the Upper Jurassic (Malm ß), SE Germany

Geothermal Energy, 2022
Tight carbonate rocks are important hydrocarbon and potential geothermal reservoirs, for example, in CO2-Enhanced Geothermal Systems. We report a study of outcrop samples of tectonically undeformed tight carbonates from the upper Jurassic “Malm ß ...
Simon Freitag, Jop Klaver, Iulian S. Malai, Norbert Klitzsch, Janos L. Urai, Harald Stollhofen, Wolfgang Bauer, Joyce Schmatz   +7 more
doaj   +1 more source

Pore structure fractal characteristics and its relationship with reservoir properties of the first Member of Lower Shihezi Formation tight sandstone in Hangjinqi area, Ordos Basin

地质科技通报, 2021
Based on physical property, casting thin section, scanning electron microscope, high-pressure mercury injection and other test analysis data, the fractal dimension of pore structure of tight sandstone reservoir was calculated by the method of mercury ...
Kai Liu, Wanzhong Shi, Ren Wang, Shuo Qin   +3 more
doaj   +1 more source

Optimal mud pressure design using nonlinear failure criteria for wellbores in shaley sedimentary reservoir

Deep Underground Science and Engineering, EarlyView.
The present study uses the Modified Mohr‐Coulomb true‐triaxial failure criterion (MMC_TT), which predicts the strength of rock better than the MGC criterion in laboratory true‐triaxial tests to overcome the limitations. Moreover, based on the data from previously published five vertical wells in the Krishna‐Godavari basin (K‐G basin), an empirical ...
Ravindra K. Burnwal, Aditya Singh
wiley   +1 more source

Blasting effects of cross‐fault deep‐buried excavation on adjacent existing tunnel stability

Deep Underground Science and Engineering, EarlyView.
Based on the theoretical analysis of cylindrical wave propagation in a deep rock mass in the fault with a filling layer, the calculation method of peak particle velocity caused by wave propagation in the existing tunnel is established. The viscoelastic characteristics of a rock mass are examined in the analysis.
Shaobo Chai, Lianzeng Chai, Chao Meng, Kai Liu, Lang Song, Shaojie Zheng   +5 more
wiley   +1 more source

Failure mechanism of the coal wall at the working face based on an eccentric compression mechanical model

Deep Underground Science and Engineering, EarlyView.
In this study, the nonuniform distribution of the bearing pressure in front of the coal wall has been revealed based on in situ monitoring data and numerical simulation results. Therefore, an eccentric compression mechanical model of the coal wall was established to study the deformation and failure characteristics of a coal wall. The slenderness ratio
Maolin Tian, Jiabao Wang, Changsheng Wang, Shijie Sun, Lijun Han, Qingbin Meng, Sunhao Zhang   +6 more
wiley   +1 more source

Geological Evidence for the Operation of Plate Tectonics throughout the Archean: Records from Archean Paleo-Plate Boundaries

Journal of earth sciences, 2018
Plate tectonics describes the horizontal motion of rigid lithospheric plates away from midoceanic ridges and parallel to transforms, towards deep-sea trenches, where the oceanic lithosphere is subducted into the mantle.
T. Kusky, B. Windley, A. Polat
semanticscholar   +1 more source

Quaternary Deformation along the Gobi–Tian Shan Fault in the Easternmost Tian Shan (Harlik Mountain), Central Asia

Remote Sensing
The Tian Shan is a typical active intracontinental orogenic belt that is driven by the ongoing indentation of India into Eurasia. However, the geological features of Quaternary deformation, especially in the easternmost sector near Harlik Mountain ...
Tianyi Shen, Yan Ding, Guocan Wang, Dehai Zhang, Zihao Zhao   +4 more
doaj   +1 more source

LEVHA TEKTONİĞİ NE ZAMAN BAŞLADI? KOMATİYİTLERİN VE MgO İÇERİKLERİNİN DEĞİŞKENLİĞİNE GÖRE LEVHA TEKTONİĞİ’NİN BAŞLANGICI

Bulletin of the Mineral Research and Exploration, 2017
Yerbilimcilerin en çok merak ettiği konulardan biri İlksel Dünya’nın (Early Earth) ne gibi evrimsel süreçler geçirerek günümüze ulaştığıdır. Bu süreçler içerisinde ise levha tektoniğinin ne zaman başladığı ayrı bir araştırma konusudur.
Anıl ARDAHANLIOĞLU, Efe DEMİRCİ
doaj   +1 more source

Hotspots, trends, and regional focus on oil or gas exploration: A bibliometric comparative study

Deep Underground Science and Engineering, EarlyView.
This paper explores the research trends in global oil and gas exploration through the bibliometric analysis of 3460 articles collected from the Web of Science database on oil and gas exploration published from 2013 to 2023. The research hotspots, objects, regional distribution, methods, and evaluation methods of oil and gas exploration are analyzed and
Jihong Wang, Zhongkai Li, Jianguo Wang, Zhiqiang Li   +3 more
wiley   +1 more source

Preparation of Multiwalled Carbon Nanotubes/Hydroxyl-Terminated Silicone Oil Fiber and Its Application to Analysis of Crude Oils

The Scientific World Journal, 2014
A simple and efficient method to analyze the volatile and semivolatile organic compounds in crude oils has been developed based on direct immersion solid-phase microextraction coupled to comprehensive two-dimensional gas chromatography/time-of-flight ...
Shukui Zhu, Ting Tong, Wanfeng Zhang, Wei Dai, Sheng He, Zhenyang Chang, Xuanbo Gao   +6 more
doaj   +1 more source