Results 131 to 140 of about 9,253,105 (381)

Composition and Resulting Band Alignment at the TiO2/InP Heterointerface: A Fundamental Study Combining Photoemission Spectroscopy and Theory

open access: yesAdvanced Functional Materials, EarlyView.
The chemical composition and band alignment are systematically investigated at the TiO2/InP heterointerface. Thin TiO2 films are deposited by ALD on atomically ordered, P‐terminated p‐InP(100). By combining UPS, XPS, and ab initio molecular dynamics, the atomistic structure and electronic alignment are revealed.
Mohammad Amin Zare Pour   +11 more
wiley   +1 more source

Fundamentals of crude oil and natural gas processing [PDF]

open access: yes, 2016
This training manual includes term project methodical guide on the course "Fundamentals of crude oil and natural gas processing" in English. The main purpose of the training manual is to provide students the theoretical and methodological assistance at ...
Bratakh, M.   +2 more
core  

An Innovative High-Strength Double-Network Hydrogel for Use as a Drilling Fluid Plugging Agent

open access: yesGels
The problem of wellbore leakage is a key challenge in the petroleum industry, limiting drilling progress and increasing drilling costs. Plugging agents play a role in repairing leaks and fractures; however, traditional plugging materials generally have ...
Yanfeng He   +7 more
doaj   +1 more source

Z‐Scheme Water Splitting Systems Based on Solid‐State Electron Conductors

open access: yesAdvanced Functional Materials, EarlyView.
This review examines the latest advances in Z‐scheme overall water splitting (OWS) systems for solar hydrogen production. These systems consist of suspended or immobilized hydrogen evolution photocatalysts (HEPs) and oxygen evolution photocatalysts (OEPs).
Chen Gu   +3 more
wiley   +1 more source

The Economic and Budgetary Effects of Producing Oil and Natural Gas From Shale [PDF]

open access: yes, 2014
[Excerpt] Recent advances in combining two drilling techniques, hydraulic fracturing and horizontal drilling, have allowed access to large deposits of shale resources—that is, crude oil and natural gas trapped in shale and certain other dense rock ...
Congressional Budget Office
core   +1 more source

Experimental study of surfactant flooding system in low permeability reservoir

open access: yesScientific Reports
In view of reservoirs with low pressure, medium porosity, and low permeability in Changqing Oilfield, along with the “double high stage” in the middle and late development featuring a sharp rise in water cut and a low comprehensive water flooding ...
Bai Jinmei   +3 more
doaj   +1 more source

Pressure Transient Analysis for Vertical Well Drilled in Filled-Cave in Fractured Reservoirs

open access: yesFluids
For capturing dynamic information about a filled-cave in the fractured reservoir, a novel Pressure Transient Analysis (PTA) analytical model for a well located at the filled-cave is established.
Wenyang Shi   +8 more
doaj   +1 more source

Impact of the Microstructure of Polymer Drag Reducer on Slick-Water Fracturing

open access: yesGeofluids, 2017
Many studies have focused on the drag reduction performance of slick-water, but the microdrag reduction mechanism remains unclear since the microstructure of the drag reducer and its effect on this mechanism have not been well studied. In this study, the
Zhi-yu Liu   +5 more
doaj   +1 more source

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