Results 1 to 10 of about 217,804 (188)

The Effect of Slickwater on Shale Properties and Main Influencing Factors in Hydraulic Fracturing

open access: yesGeofluids, 2023
As shale gas reservoirs have low porosity and low permeability, hydraulic fracturing is a necessary means for industrial exploitation of shale gas. In this study, aiming at the problem of reservoir damage in the process of hydraulic fracturing of shale ...
Jiawei Liu   +7 more
doaj   +1 more source

The Hybridisation of Higher Education in Canada

open access: yesInternational Review of Research in Open and Distributed Learning, 2002
Canada's postsecondary institutions are becoming increasingly involved with technology enhanced learning, generally under the rubric of distance education.
Douglas Shale
doaj   +3 more sources

Relationship between Shale Hydration and Shale Collapse

open access: yesACS Omega, 2022
Shale gas has become the major source of natural gas. However, shale is rich in clay and easily collapsed by water invasion. This not only causes collapse of the reservoir but also causes the loss of natural gas and can even cause local earthquakes and affect the safety of human beings.
Wenxin Dong   +6 more
openaire   +2 more sources

Left Hemithyroidectomy in Combined Thyroid Cancer with Previous Right Lobe Tumour Surgery: a Clinical Case

open access: yesКреативная хирургия и онкология, 2021
Background. Combined thyroid cancer is extremely rare. There is no unified approach currently to the choice of treatment and extent of surgery in combined cancer.Aim.
S. P. Muzhikov, M. Iu. Eremenko
doaj   +1 more source

Rapid and Slow Unlocking-Induced Startup Mechanisms of Locked Segment-Dominated Landslides

open access: yesGeofluids, 2023
Locked segment-dominated landslides initiate when locked segments are sufficiently damaged to be unlocked. The evolution of such slopes toward instability displays either an exponentially or stepwise accelerated displacement pattern, but the underlying ...
Hongran Chen   +3 more
doaj   +1 more source

The EU Maritime Regime and Challenges for Land-locked Developing States: Evidence from Ethiopia

open access: yesMizan Law Review, 2020
EU plays a dominant role in international maritime governance, and it has comprehensive maritime policies and strategies that have implications for third States.
Tessema Elias Shale
doaj   +1 more source

Oil shale, shale oil, shale gas and non-conventional hydrocarbons [PDF]

open access: yesEPJ Web of Conferences, 2015
In recent years there has been a world “revolution” in the field of unconventional hydrocarbon reserves, which goes by the name of “shale gas”, gas contained inside clay sediments micropores. Shale gas finds particular development in the United States, which are now independent of imports and see a price reduction to less than one third of that in ...
Clerici A., Alimonti G.
openaire   +2 more sources

Preparation of Oil-Based Foam Gel with Nano-SiO2 as Foam Stabilizer and Evaluation of Its Performance as a Plugging Agent for Fractured Shale

open access: yesGeofluids, 2022
The development of natural fracture will lead to lost circulation, which will be likely to cause economic losses and reduce drilling efficiency. In order to solve this problem, an oil-based pressure-bearing foam gel plugging agent for fractured shale was
Daqi Li   +5 more
doaj   +1 more source

Evaluation of the remaining reserves of shale gas and countermeasures to increase the utilization of reserves: Case study of the Wufeng–Longmaxi formations in Changning area, southern Sichuan Basin, China

open access: yesJournal of Natural Gas Geoscience, 2023
The evaluation of remaining reserves is crucial for assessing the developmental effect and further enhancing the recovery of a gas field. In this research, with the Changning shale gas field in the southern Sichuan Basin as the center of study, a ...
Shengxian Zhao   +7 more
doaj   +1 more source

Scattering matrix in external field problems [PDF]

open access: yes, 1995
We discuss several aspects of second quantized scattering operators $\hat S$ for fermions in external time dependent fields. We derive our results on a general, abstract level having in mind as a main application potentials of the Yang--Mills type and in
Edwin Langmann   +2 more
core   +3 more sources

Home - About - Disclaimer - Privacy