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Search Results: 1 - 10 of 10071 matches for " Songru Mu "
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The Residual Potential of Bottom Water Reservoir Based upon Genetic Algorithm for the Relative Permeability Inversion  [PDF]
Dong Zhang, Jie Tan, Dongdong Yang, Songru Mu, Qin Peng
Journal of Geoscience and Environment Protection (GEP) , 2019, DOI: 10.4236/gep.2019.74012
Abstract: X oilfield has successfully adopted horizontal wells to develop strong bottom water reservoirs, as a typical representative of development styles in the Bohai offshore oilfield. At present, many contributions to methods of inverting relative permeability curve and forecasting residual recoverable reserves had been made by investigators, but rarely involved in horizontal wells’ in bottom water reservoir. As the pore volume injected was less (usually under 30 PV), the relative permeability curve endpoint had become a serious distortion. That caused a certain deviation in forecasting residual recoverable reserves in the practical value of field directly. For the performance of water cresting, the common method existed some problems, such as no pertinence, ineffectiveness and less affecting factors considered. This paper adopts the streamlines theory with two phases flowing to solve that. Meanwhile, based on the research coupling genetic algorithm, optimized relative permeability curve was calculated by bottom-water drive model. The residual oil saturation calculated was lower than the initial’s, and the hydrophilic property was more reinforced, due to improving the pore volume injected vastly. Also, the study finally helped us enhance residual recoverable reserves degree at high water cut stage, more than 20%, taking Guantao sandstone as an example. As oil field being gradually entering high water cut stage, this method had a great significance to evaluate the development effect and guide the potential of the reservoir.
Study on Productivity Model of Herringbone-Like Laterals Wells and Optimization of Morphological Parameters Considering Threshold Pressure Gradient in Heavy Oil Reservoirs  [PDF]
Enhui Sun, Jie Tan, Dong Zhang, Wei Wang, Songru Mu
World Journal of Engineering and Technology (WJET) , 2019, DOI: 10.4236/wjet.2019.72021
Abstract: Compared with conventional well, herringbone-like laterals wells can increase the area of oil release, and can reduce the number of wellhead slots of platforms,?and?also can greatly improve the development efficiency. Based on threshold pressure gradient in heavy oil reservoir,?and?the applied principle of mirror reflection and superposition, the pressure distribution equation of herringbone-like laterals wells is obtained in heavy oil reservoir. Productivity model of herringbone-like laterals wells is proposed by reservoir-wellbore steady seepage. The example shows that the productivity model is great accuracy?to?predict the productivity of herringbone-like laterals wells. The model is used to analyze the branching length, branching angle, branching symmetry, branching position and spacing and their effects on productivity of herringbone-like laterals wells. The principle of optimizing the well shape of herringbone-like laterals wells is proposed.
Study on Flow Unit of Heavy Oil Bottom Water Reservoir with Over-Limited Thickness in Offshore Oilfield  [PDF]
Wei Wang, Jie Tan, Songru Mu, Bo Li, Wentong Zhang
Open Journal of Geology (OJG) , 2019, DOI: 10.4236/ojg.2019.99033
Abstract: The upper Ming section of L oilfield is a typical offshore heavy oil bottom-water reservoir with thick fluvial layers. All horizontal wells are developed by natural energy. Due to the few drilling holes and influence by the resolution of seismic data, it is difficult to describe reservoirs with thickness over 20 meters. In this paper, seismic resonance amplitude inversion technology is introduced to restore the real response of thick reservoirs and interbeds by drilling and drilling verification, and the geological bodies with different thickness are displayed by frequency division RGB three primary colors. Flow units of heavy oil reservoirs with bottom water are divided according to the three major factors of interlayer, lithologic internal boundary and water-oil thickness ratio which have the greatest influence on horizontal well development, thick sand bodies are divided into 10 different flow units in three levels, each unit is separated from each other, and the reservoir structure, water-cut characteristics and water-flooding characteristics are different. The reliability of the research is improved by using the dynamic data of horizontal wells and newly drilled passing wells, which provides a basis for tapping the potential of heavy oil reservoirs with bottom water.
Adjustment of Liquid Production in Reservoir with Handling Capacity Constraints  [PDF]
Jie Tan, Dong Zhang, Dongdong Yang, Songru Mou, Qin Peng
Journal of Geoscience and Environment Protection (GEP) , 2019, DOI: 10.4236/gep.2019.74002
Abstract: A oilfield was an oil reservoir with strong bottom water in offshore, the water cut was as high as 96%. In the high water cut stage, the most effective way of increasing oil production was to extract liquid and increase oil. The processing capacity of oilfield fluid was limited by the conditions. By using Petrel-RE-2017 software, combining reservoir engineering and percolation mechanics methods, this paper analyzes the effect of large-scale liquid pumping, expand coverage and shut-in coning in oil reservoirs with bottom water, and formulates the adjustment strategy of single well production structure of the whole oilfield. It was confirmed that large-scale liquid production can expand coverage and shutting down well can reduce water cut. It can provide reference and guidance for oil field with strong bottom water when it encounters bottleneck of liquid treatment capacity.
Spectra of Hydrogen Atom with GUP and Extra Dimensions  [PDF]
Benrong Mu
Journal of Modern Physics (JMP) , 2013, DOI: 10.4236/jmp.2013.45B006
Abstract:

We argue that the Generalized Uncertainty Ptinciple (GUP) and the compact Extra dimensions will lead the hydrogen atom has the non bounded state spectra which equal the free particle in extra dimensions. We use Generalized Uncertainty Principle (GUP) to calculate the new energy spectra of hydrogen atom, and which lives in three dimensional Euclidean spaces with one extra dimension. The result is not familiar with our known before that En =0 when n is large enough. In our modified new spectra, we obtain that En,ι,0 = (1+2βι2ρ2) ι222, which is lager than zero. These new spectra give us new method to obtain the existence of extra dimensions. Finally, we find that the spectra are same as part of extra dimensions in planck scale.

The Effect of Reputation to the Moral Hazard in C2C E-Market with Game Theory  [PDF]
Fangjun Mu
American Journal of Operations Research (AJOR) , 2015, DOI: 10.4236/ajor.2015.55030
Abstract: It is well known that the reputation is the basis of a seller to survive and gain trust from customers in a competitive business environment. But as the existence of information asymmetry between buyer and seller, the moral hazard problem is the key obstacle that impedes the benefits of related shareholders and reduces the efficiency of total market. It is crucial to design a control mechanism to avoid the negative impact of moral hazard. This paper studies the principal and agent relationship between buyer and seller in C2C e-market; because of the influence of information asymmetry, many customers suffered from being cheated by sellers with defective products in practice. These frequent cases will deteriorate long term relationship between sellers and buyers. Here we focus on the analysis of the causes of moral risks and the effect of reputation on oral risk with repeated game theory. The purpose of this paper is to help both firms and customers effectively avoid morality risk and realize a win-win situation.
Optimality of a nonlinear stability criterion of two-layer Phillips model
Mu Mu
Chinese Science Bulletin , 1998, DOI: 10.1007/BF02883569
Abstract: The optimdity of a nonlinear stability criterion of motions of twelayer Phillips model is investigated. The result shows that for a given zonal periodical channel, there exist cases that there is no normal mode which grows exponentially even if the sufficient conditions of the criterion are destroyed. On the other hand, the above criterion is optimal in the following sense: when the sufficient conditions of the criterion are destroyed, except some critical cases, there exists a finite d periodical channel, in which there is a zonal normal mode growing exponentially.
Joint Decision of Pricing and Cross-Ruff Coupon Value under Substitute (Complement) Demand  [PDF]
Zhongguo Shi, Yinping Mu
American Journal of Industrial and Business Management (AJIBM) , 2012, DOI: 10.4236/ajibm.2012.21001
Abstract: This paper focuses on the optimal decisions of pricing and cross-ruff coupon face value for two linked brands products. We develop the profit maximization models for two kinds of coupons: in-pack cross-ruff coupon and on-pack cross-ruff coupon under substitute (complement) demand, and conclude that 1) the coupon values, prices and profit under substitute demand are higher than under complement demand or independent demand; 2) the profit under on-pack coupon mode are higher than in-pack coupon mode. According to the results, we provide the managerial insights for choosing the linked brands. Through numerical example, we observe that the coupon values, target brand prices and carrier brand prices for on-pack cross-ruff coupon are more sensitive than in-pack cross-ruff coupon to reference price.
Research on the Tourism Effect and Marketing Strategy of Convention & Exposition Industry: A Case Study of Shenzhen City of China  [PDF]
Rong Wu, Mu Zhang
Journal of Service Science and Management (JSSM) , 2013, DOI: 10.4236/jssm.2013.62015
Abstract:

There is a close natural connection in tourism and Convention & Exposition (C&E) since they are mutually affected and promoted. This study attempts to theoretically analyze the tourism effect and marketing tactics of the C&E industry. To do this, the inductive method and value train theory are introduced to analyze the supply and demand of tourism. Findings reveal that not only can C&E produce positive influences such as synergistic effect and cluster effect on tourism, but also negative result which is characterized by spillover effect. Taking Shenzhen city of China as an example, several marketing strategies are found. It is concluded that such strategies on C&E and events exhibition can meet the needs of Shenzhen, and improve the tour image of this city, so as to help expand its influence on tourism.

Lie Symmetries, 1-Dimensional Optimal System and Optimal Reductions of (1 + 2)-Dimensional Nonlinear Schrödinger Equation  [PDF]
Meirong Mu, Chaolu Temuer
Journal of Applied Mathematics and Physics (JAMP) , 2014, DOI: 10.4236/jamp.2014.27067
Abstract:

For a class of (1 + 2)-dimensional nonlinear Schrodinger equations, classical symmetry algebra is found and 1-dimensional optimal system, up to conjugacy, is constructed. Its symmetry reductions are performed for each class, and someexamples of exact invainvariant solutions are given.

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