Xian Shi you University

Fengcheng, China

Xian Shi you University

Fengcheng, China
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Wang Y.-Y.,Xian Shi you University | Wang Y.-Y.,China Petroleum First Construction Corporation | Liang S.-R.,Xian Shi you University | Wang Z.-J.,Xian Shi you University
Xiandai Huagong/Modern Chemical Industry | Year: 2014

PRO/II software is used to to simulate the methanol absorber in rectisol process. The NRTL equation is chosen to describe the system. The effects of flow rate, temperature and diversion of methanol on the sensitivity are studied. The optimization of the liquid-gas ratio in methanol absorber is performed as well.


Yuan Z.,Xian Shi You University | Li W.-H.,Northwest University, China | Zhu J.,Petrochina | Guo Y.-Q.,Xian Shi You University
Geological Bulletin of China | Year: 2013

With logging, seismic, core and other geological data, the paleogeomorphology was rebuilt according to the impression method and comprehensive geological method. The results reveal various paleogeomorphic patterns, such as high land, valley, brae, mound and river terrace. Based on the relationships between the paleomorphology and the formation of Yan'an oil reservoir, the authors inferred that reservoirs are mainly distributed in the brae near high land and other relatively high zones. Favorable conditions for petroleum accumulation included the upward migration pathway of hydrocarbon from source rock of Yanchang Formation via the incised valley, the type and distribution of reservoirs and sand bodies were controlled by the brae, and the relatively high zones of later structural traps were formed by the "impression" of layers.


Zhang Y.-S.,Xian Shi you University | Qiao X.-G.,Xian Shi you University | Qiao X.-G.,Northwest University, China | Shao M.,Xian Shi you University | And 3 more authors.
Guangzi Xuebao/Acta Photonica Sinica | Year: 2015

An in-fiber Mach-Zehnder interferometer humidity sensor based on waist-enlarged fiber tapers cascade structure was proposed and demonstrated. The sensor head is formed by a taper-single-mode-taper-single-mode-taper structure through arc fusion splicing. The change of the humidity and temperature will make the optical path difference changed of the sensor core mode and cladding modes, causing interference spectral change. Through monitoring the spectra variation can determine the ambient physical quantities. The experimental results show that the humidity sensitivity of the sensor is -0.065 dB/%RH with a linearity of 0.997 in the humidity range of 35~95%RH; the temperature sensitivity of the sensor is 69.4 pm/℃ with a linearity of 0.998 in the temperature range of 30~80℃. This sensor can avoid the cross-sensitivity to humidity and temperature, make it a good candidate for high accuracy humidity and temperature applications. ©, 2015, Chinese Optical Society. All right reserved.


Liu Y.S.,Xian Shi You University | Ning Y.P.,Xian Shi You University
Applied Mechanics and Materials | Year: 2012

In this paper, the instrument is designed by basing on principle of the measurement method of straightness error measurement of deep hole, the design technologies of A/D converters, automatic control and computer are used. The instrument can automatically acquire data, the process of acquire data is convenient, fast, safe and the data is reliable. © (2012) Trans Tech Publications, Switzerland.


Zhang J.,Northwest University, China | Qiao X.,Northwest University, China | Qiao X.,Xian Shi You University | Feng Z.,Northwest University, China | And 3 more authors.
2011 Symposium on Photonics and Optoelectronics, SOPO 2011 | Year: 2011

A compact metal bellows-based fiber Bragg grating accelerometer is proposed in this paper. The acceleration can be measured by monitoring the center wavelength shift of FBG, which we show is proportional to accelerometer. The experimental results indicate that the FBG accelerometer with a high sensitivity of 567.2pm/g shows a good linear response of the wavelength shifts versus applied acceleration. In addition, it provides a broad flat response over a vibration frequency ranging from 5 to 120Hz. The upper vibration frequency limit of measure is determined by mechanical resonance, and can be tuned by varying the weight of inertial mass. A series of table-shaking tests were conducted and showed good performance of a prototype FBG accelerometer. © 2011 IEEE.


Shu L.Y.,Xian Shi you University | Feng L.Z.,Xian Shi you University
Advanced Materials Research | Year: 2012

Deep hole processing system resonance test devices can accurately and quickly find the whole system resonance frequency, for use of negative pressure device system to processing components provided a convenient, makes the precision of parts is further improved. © (2012) Trans Tech Publications.


Xiao Z.L.,Xian Shi You University | Chen J.B.,Xian Shi You University | Qin W.L.,Xian Shi You University
Applied Mechanics and Materials | Year: 2014

The fine grain, poor sorting and high cement content in low permeability reservoirs lead to poor reservoir property, low porosity and permeability and have strong damage to the reservoir.The conventional way of low permeability oil mining is mainly fracture and chemical flooding, which cost is relatively high and will cause serious irreparable damage to formation. People are in favor of physical oil production technology because it is no harm and pollution to the reservoir, more flexible to operate and it has wide range of application and low cost. By using high frequency pulse pressure servo system and ZC-type I, this paper examines the low-frequency vibration oil recovery indoor simulation test device hydraulic pulse oil displacement effect of low permeability cores. The experiment selecting the artificial core (permeability are less than 50), examines the effects of different hydraulic pulse parameters (frequency, static pressure and dynamic pressure) on low permeability core permeability and recovery factor. The results showed that only when the three parameter,hydraulic pulse frequency, static pressure and dynamic pressure, suitably combined will greatly increase the reservoir recovery efficiency and reduce residual oil saturation. © (2014) Trans Tech Publications, Switzerland.


Xiao Z.L.,Xian Shi You University | Fan Y.J.,The No.3 Oil Production Plant of Changqing Oilfield Company | Chen J.B.,Xian Shi You University
Applied Mechanics and Materials | Year: 2014

Compound perforation fracturing technology is a space combination type ultra-deep perforating that can overcome some flaws conventional perforation has, such as shallow penetration and compaction damage. It can remove the compaction band and near wellbore pollution in rock matrix which results from conventional perforation. This paper introduces the theory of effect and influence factor of compound perforation fracturing technology and summarize the advantages for low permeability gas well on the basis of analyzing the mechanism of action about increase production of compound perforation. In order to evaluate the effects of application of this technology in in low permeability reservoir, 11 compound perforation wells and 12 conventional perforation wells were selected which have the similar physical property and the evaluation was conducted in two blocks. The results show that compound perforation can make the formation fracture pressure decrease in 3~5MPa and increase the permeability near the perforation channel. This technology has better effects than the conventional and decrease the cost effectively, improving production in low permeability oil and gas field. © (2014) Trans Tech Publications, Switzerland.


Hao H.-N.,Xian Shi You University
Proceedings - 2010 6th International Conference on Natural Computation, ICNC 2010 | Year: 2010

For short-term forecasting of stock price, this paper proposes a method of analyzing and forecasting the closing price of a stock based on the genetic-BP algorithm. Results show that, within the range of allowable error, the obtained data from the present model can well forecast the short-term trend of a stock price. Though stock market is a very complex nonlinear system, it has the better foreground to predict stock price using neural network. The studies in this paper also prove that genetic- neural algorithm can improve the speed and reliability of the foresting method. © 2010 IEEE.

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