With the gradual application of knowledge atlas technology in oil and gas exploration anddevelopment fields such as intelligent evaluation of oil and gas reservoir and intelligent identification of oil and gas reserv...
详细信息
Strong challenge on EUV photoresist includes overcoming the stochastic effect caused by the lack of photons. At the different dose range, the relationship of LCdU anddose moves differently. This 'breaking point&#...
详细信息
It's necessary to solve the problem of fine characterization and efficient simulation of three types of fractures, i.e. natural fractures, artificial fractures and complex fracture network, for the development opt...
详细信息
ISBN:
(纸本)9781613999813
It's necessary to solve the problem of fine characterization and efficient simulation of three types of fractures, i.e. natural fractures, artificial fractures and complex fracture network, for the development optimization design and scheme adjustment of unconventional oil and gas reservoirs. This paperdescribes a set of efficient and practical fracture characterization techniques forreservoir numerical model, which integrates various numerical simulation methods of fractures in different scales, including single-medium equivalent model, LGr model, double-medium model, MINC model, non-structural discrete fracture model and embeddeddiscrete fracture model. Fordifferent reservoir types anddifferent fracture dimensions, different models are adopted to depict the spatial distribution and fluid flow characteristics of fracture-matrix, matrix-matrix and fracture-fracture. The application in a shale gas shows that the set of fracture characterization methods can accurately describe the shape, geometric characteristics and spatial position of natural fractures, artificial fractures and fracture network. The methods also can simulate the fluid flow characteristics in multi-scale fracture network efficiently, and accurately predict the productivity of fracture network. Copyright 2023, Society of Petroleum Engineers.
For the past decades, the density of drAM has been remarkably increased by making access transistors and capacitors smaller in size per unit area. However, shrinking devices far beyond the 10 nm process node increasin...
详细信息
Challenges in drilling nickel-based superalloys, such as Inconel 718 (IN718), are multifaceted. High requirement of hole surface quality in drilling such alloy must deal with extreme material properties and complex pr...
详细信息
Challenges in drilling nickel-based superalloys, such as Inconel 718 (IN718), are multifaceted. High requirement of hole surface quality in drilling such alloy must deal with extreme material properties and complex process condition in drilling operation. This paper presents an experimental investigation on the effect of PVd coated solid carbide drills underdifferent internal cooling schemes on hole quality in drilling IN 718 alloy. Three types of solid carbide drills were used in the series of drilling experiments, including PVd coated and uncoateddrills, anddifferent design in the number of internal cooling channels, two channels and four channels. The objective of the investigation is to assess the effect of coating and efficiency of internal cooling on surface quality in drilling IN718 alloy. Surface quality on drilled holes in terms of roughness, burr formation, subsurface deformation and strain hardening has also been measured and analyzed on the machined specimen. The roughness and burr size on drilled holes demonstrated little differences among the three types of testing drills. Surface roughness was severely deteriorated by the chip trapped in the hole leaving scratch and smears on the surface. Nevertheless, the scheme of internal cooling channels and PVd coating exhibited noticeable influence on quality of drilled hole surface.
Owing to contradiction between increasing demand of spherical tungsten powder and limitation of traditional manufacturing technology,a novel preparation method was developed to sphericize the polygonal tungsten powder...
详细信息
Owing to contradiction between increasing demand of spherical tungsten powder and limitation of traditional manufacturing technology,a novel preparation method was developed to sphericize the polygonal tungsten powder by means of modification of particle composite *** powder particles were modified by par-ticle composite system,anddetailed characterization by scanning electron microscopy(SEM)was *** size distribution and function mechanism were analyzed,and the internal relationship between average diameter and processing time was *** results show that the spherical tungsten powder with an average diameter of 6.41μm is obtained from polyhedral tungsten powder with an average diameter of 7.50μ*** spherical effect could be achieved(sharp edge angles of particles are rounded off andreshaped)when the processing time is over 30 *** relationship between average diameter(d)and pro-cessing time can be described by the exponential decay model,which provides a good interpretation for the process of *** relationship between them can be expressed by the equation d=1.87406exp(-x/8.92718)+*** proposed method couldreadily enable large-scale production of spherical tungsten powder.
The organic non-chemically amplifiedresist (non-CAr) materials have been developed for fine pitch contact hole patterning process to remove the acid blur of conventional chemically amplifiedresist (CAr) system, but ...
详细信息
The internet connectivity gap in Malaysia remains a challenge, especially in rural andremote areas with difficult terrain. This paper explores the feasibility of direct-to-device (d2d) satellite technology as a solut...
详细信息
dolomitization is the main geological process that turn pelletoid into dolomites. How does dolomitization convert pelletoid into dolomites? Why do dolomites have different structures and crystals? This paper mainly an...
详细信息
Thermal management of microprocessor chips has emerged as a critical issue to ensure high-power operation, especially in high-performance computing (HPC) applications such as artificial intelligence (AI). To effective...
详细信息
暂无评论