Results 71 to 80 of about 466,826 (265)

Study of Wellbore Instability and Collapse Mechanism for a Layered Continental Shale Oil Horizontal Well

open access: yesEnergies, 2022
The shale oil horizontal wells in the Songliao Basin are affected by a lack of mature theories, technologies and experiences in the direction of wellbore stability. Wellbore collapse may occur, and in severe cases, the wellbore may be scrapped, resulting
Shibin Li   +6 more
semanticscholar   +1 more source

Seismic imaging of the critical zone of dolerite dykes at Cap Fréhel in Brittany (France)

open access: yesNear Surface Geophysics, EarlyView.
Abstract In June 2023, we measured ten near‐surface seismic profiles to image the critical zone of dolerite (diabase) dykes that cut the sandstone at Cap Fréhel in Brittany (France). Seismic ray tracing and inversion are used to determine the thickness of the regolith layer from first‐arrival P‐wave traveltimes.
M. Zillmer   +4 more
wiley   +1 more source

The role of water bridge on gas adsorption and transportation mechanisms in organic shale

open access: yesScientific Reports
This work introduces and discusses the impacts of the water bridge on gas adsorption and diffusion behaviors in a shale gas-bearing formation. The density distribution of the water bridge has been analyzed in micropores and meso-slit by molecular ...
Binhui Li   +5 more
doaj   +1 more source

Geology of the Transverse Range Province, Southern California [PDF]

open access: yes, 1954
The Transverse Range province of southern California is an elongate geomorphic and structural unit that trends essentially east-west across parts of Santa Barbara, Ventura, Los Angeles, San Bernardino, and Riverside Counties (pl. 4).
Bailey, Thomas L., Jahns, Richard H.
core  

Distribution of discontinuous mudstone beds within wave-dominated shallow-marine deposits : Star Point Sandstone and Blackhawk Formation, Eastern Utah [PDF]

open access: yes, 2014
Acknowledgements Funding for this study was provided from the Research Council of Norway through the Petromaks project 193059 and the FORCE Safari Project. The lidar data was collected by Julien Vallet and Samuel Pitiot of Helimap Systems SA.
Buckley, Simon   +2 more
core   +2 more sources

A Comparison of Geological Characteristics of the Main Continental Shale Oil in China and the U.S.

open access: yes, 2021
Shale oil is an important strategic resource in the future. The development and utilization of shale oil is a pivotal revolution in the fi eld of fossil energy. The successful development in North America brings new thinking to the world. In recent years,
Mengying Li, Xinkai Chen, Xixin Wang
semanticscholar   +1 more source

Deciphering Freeze–Thaw Dynamics In Rockwalls: A Novel Approach for High Accuracy Regional‐Scale Modeling

open access: yesPermafrost and Periglacial Processes, EarlyView.
ABSTRACT Using a large and novel array of instruments on five rockwalls in northern Gaspesia, their respective surface energy balances were calculated and their thermal regimes were measured and modeled to depths exceeding the seasonal frost penetration.
Tom Birien, Francis Gauthier
wiley   +1 more source

Experimental study on initiation and propagation of hydraulic fractures in stratified shale oil reservoirs

open access: yesJournal of Petroleum Exploration and Production Technology
The bedding planes of the Gulong shale oil reservoir in Daqing, China are extremely developed, which causes the hydraulic fractures to extend excessively in the horizontal direction while their longitudinal propagation is limited. In order to improve the
Hao Qin   +11 more
doaj   +1 more source

Geochemical Characteristics and Paleoenvironmental Reconstruction of the Cretaceous Qingshankou Formation Shales in the Southeastern Uplift of the Songliao Basin: A Case Study from the Niaohexiang Section of Binxian, China

open access: yesApplied Sciences
The Qingshankou Formation shales in the southeastern uplift of the Songliao Basin provide an ideal archive for constraining the controls of paleoenvironment on organic matter enrichment.
Yangxin Su   +5 more
doaj   +1 more source

Geology of the Tehachapi Mountains, California [PDF]

open access: yes, 1954
The San Joaquin-Sacramento Valley, also known as the Great Valley of California, separates the Coast Ranges on the west from the Sierra Nevada on the east. The southern part of this major physiographic and structural province is about 50 miles in average
Buwalda, John P.
core  

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