Results 61 to 70 of about 8,189 (339)

Progress and development directions of shale oil reservoir stimulation technology of China National Petroleum Corporation

Petroleum Exploration and Development, 2021
By reviewing the development history of shale oil reservoir stimulation technology of PetroChina Company Limited (PetroChina), we have systematically summarized the main progress of shale oil reservoir stimulation technology of CNPC in five aspects ...
Qun LEI, Dingwei WENG, Shengchun XIONG, Hanbin LIU, Baoshan GUAN, Qiang DENG, Xuemei YAN, Hongbo LIANG, Zeyuan MA   +8 more
doaj  

A new Crocodyloidea from the middle Eocene of Zamora (Duero Basin, Spain)

The Anatomical Record, EarlyView.
Abstract The eusuchian crocodyliforms recorded in the Eocene levels of the Spanish Duero Basin belong to three lineages: Planocraniidae, with the species Duerosuchus piscator; Alligatoroidea, represented by several specimens of the genus Diplocynodon; and Crocodyloidea, which includes several specimens traditionally attributed to Asiatosuchus.
Iván Narváez, Ane de Celis, Fernando Escaso, Santiago Martín de Jesús, Adán Pérez‐García, Francisco Ortega   +5 more
wiley   +1 more source

Multi-scale approach to invasion percolation of rock fracture networks [PDF]

Journal of Hydrology 519, 353 (2014), 2014
A multi-scale scheme for the invasion percolation of rock fracture networks with heterogeneous fracture aperture fields is proposed. Inside fractures, fluid transport is calculated on the finest scale and found to be localized in channels as a consequence of the aperture field. The channel network is characterized and reduced to a vectorized artificial
arxiv   +1 more source

A theory of fracture of materials and its application to geology

Eos, Transactions American Geophysical Union, 1950
A theory of fracture of materials is developed which encompasses shear and tension failure. The probability of fracture occurring across a given surface element in an isotropic medium is assumed to be a general function of the limiting normal and tangential stresses across that element. A modification is later introduced to allow for anisotropy wherein
openaire   +2 more sources

Comparing cranial biomechanics between Barbourofelis fricki and Smilodon fatalis: Is there a universal killing‐bite among saber‐toothed predators?

The Anatomical Record, EarlyView.
Abstract Saber‐tooths, extinct apex predators with long and blade‐like upper canines, have appeared iteratively at least five times in the evolutionary history of vertebrates. Although saber‐tooths exhibit a relatively diverse range of morphologies, it is widely accepted that all killed their prey using the same predatory behavior. In this study, we CT‐
Borja Figueirido, Shane Tucker, Stephan Lautenschlager   +2 more
wiley   +1 more source

The propagation mechanism of elastoplastic hydraulic fracture in deep reservoir

International Journal of Coal Science & Technology
The oil and gas industry is increasingly focusing on exploring and developing resources in deep earth layers. At high temperatures, confining pressures, and geostress differences, rock has the mechanical characteristics of plastic enhancement, which ...
Jinbo Li, Siwei Meng, Suling Wang, He Liu, Kangxing Dong, Qiuyu Lu   +5 more
doaj   +1 more source

Synapsids and sensitivity: Broad survey of tetrapod trigeminal canal morphology supports an evolutionary trend of increasing facial tactile specialization in the mammal lineage

The Anatomical Record, EarlyView.
Abstract The trigeminus nerve (cranial nerve V) is a large and significant conduit of sensory information from the face to the brain, with its three branches extending over the head to innervate a wide variety of integumentary sensory receptors, primarily tactile.
Juri A. Miyamae, Julien Benoit, Irina Ruf, Zoleka Sibiya, Bhart‐Anjan S. Bhullar   +4 more
wiley   +1 more source

Fracture Model Reduction and Optimization for Forchheimer Flows in Reservoir [PDF]

J. Math. Phys. 60, 051504 (2019), 2017
In this study, we analyze the flow filtration process of slightly compressible fluids in fractured porous media. We model the coupled fractured porous media system, where the linear Darcy flow is considered in porous media and the nonlinear Forchheimer equation is used inside the fracture.
arxiv   +1 more source

Exposed weapons: A revised reconstruction of the facial anatomy and life appearance of the saber‐toothed cat Megantereon (Felidae, Machairodontinae)

The Anatomical Record, EarlyView.
Abstract Megantereon was a widespread saber‐toothed felid from the Pliocene and Pleistocene of the Old World and North America, but its rarity in the fossil record makes it complicated to restore its life appearance. Lack of complete specimens makes it necessary to combine information from fossils of different individuals to reconstruct their facial ...
Mauricio Antón, Gema Siliceo, Juan Francisco Pastor, Qigao Jiangzuo, Manuel J. Salesa   +4 more
wiley   +1 more source

Enhancing Understanding of Hydraulic Fracture Tip Advancement through Inversion of Low-Frequency Distributed Acoustic Sensing Data [PDF]

arXiv, 2023
Characterizing the fluid-driven fracture tip advancing process presents a significant challenge due to the difficulty of replicating real-world conditions in laboratory experiments and the lack of precise field measurements. However, recent advances in low-frequency distributed acoustic sensing (LF-DAS) technology offer new opportunities to investigate
arxiv