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Search Results: 1 - 10 of 762 matches for " Songru Mou "
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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.
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.
An Efficient Intragenic Vector for Generating Intragenic and Cisgenic Plants in Citrus  [PDF]
Chuanfu An, Vladimir Orbovi?, Zhonglin Mou
American Journal of Plant Sciences (AJPS) , 2013, DOI: 10.4236/ajps.2013.411265
Abstract: Genetic transformation has become a promising tool for improvement of a variety of crop species. However, transferring genes across species, the presence of selectable marker genes, and bacteria-derived vector backbone sequences have raised considerable health and environmental concerns. Intragenic vector system-based intragenesis/cisgenesis is a new method using transgenic approach to achieving traditional breeding objectives but circumventing many of the associated shortcomings. We report here the development of an intragenic vector by assembling a T-DNA-like fragment and a buffering sequence following the left border from Citrus clementina into the backbone of the binary vector pCB302. Recovery of citrus regenerants is performed under non-selective conditions and positive intra-/cisgenic regenerants were identified through PCR analysis. Transformation efficiencies obtained in Arabidopsis and Duncan grapefruit were ~3% and ~0.67%, respectively, demonstrating the potential of the system for development of “foreign DNA-free” intra-/cisgenic citrus cultivars.
Mutations in Lettuce Improvement
Beiquan Mou
International Journal of Plant Genomics , 2011, DOI: 10.1155/2011/723518
Abstract: Lettuce is a major vegetable in western countries. Mutations generated genetic variations and played an important role in the domestication of the crop. Many traits derived from natural and induced mutations, such as dwarfing, early flowering, male sterility, and chlorophyll deficiency, are useful in physiological and genetic studies. Mutants were also used to develop new lettuce products including miniature and herbicide-tolerant cultivars. Mutant analysis was critical in lettuce genomic studies including identification and cloning of disease-resistance genes. Mutagenesis combined with genomic technology may provide powerful tools for the discovery of novel gene alleles. In addition to radiation and chemical mutagens, unconventional approaches such as tissue or protoplast culture, transposable elements, and space flights have been utilized to generate mutants in lettuce. Since mutation breeding is considered nontransgenic, it is more acceptable to consumers and will be explored more in the future for lettuce improvement. 1. Introduction There is an increasing demand by consumers for nutritious foods that improve physical performance, reduce risks of diseases, and increase the life span. Lettuce (Lactuca sativa L.), commonly found in salad mixtures and sandwiches, is an important component in western diet and nutrition. Lettuce was the second most consumed fresh vegetable in the USA at 28.0 pounds per capita in 2008, behind potato at 36.7 pounds [1]. Lettuce belongs to the family Asteraceae (Compositae), tribe Cichorieae. Of about 100 species of Lactuca, only three (L. serriola L., L. saligna L., and L. virosa L.) can be crossed to lettuce by conventional hybridization methods and thus form the most important breeding group. They are all self-fertilized diploids with 2n = 2x = 18 chromosomes. There are five major types of lettuce: crisphead (iceberg), romaine, leaf, butterhead, and stem. Stem lettuce is mainly produced in China. In 2010, 58% of the lettuce production in the USA was of the head type, 29% was romaine, and 13% was leaf types [2]. Genetic variation is very important for any crop breeding program. The inbred nature of lettuce dictates the relatively limited genetic variability in the crop as compared to cross-pollinated crops. Mutation is a valuable tool to create novel traits for lettuce plants and can be classified as natural mutations and induced mutations (Table 1). Natural mutations are still occurring in the crop and its wild relatives, though at a low rate, and resulting beneficial characters can be selected for human needs. Mutagenic
Expression of c-met in human kidney fibroblasts induced by high glucose in vitro and the regulation of Radix Astragali
Shan MOU
Zhong Xi Yi Jie He Xue Bao , 2008,
Abstract: Objective: To investigate the effect of high glucose on the expression of c-met in human kidney fibroblasts in vitro, and to explore the regulation of Radix Astragali.Methods: A cell culture system of human kidney fibroblasts was developed in vitro. The human kidney fibroblasts were divided into normal control group, high glucose group and mannitol group. Expressions of c-met and transforming growth factor-beta1 (TGF-β1) mRNAs were detected by reverse transcription polymerase chain reaction (RT-PCR) and the expressions of c-met protein were analyzed by Western blot method after 6-, 12-, 24-, 48- and 96-hour culture. The human kidney fibroblasts were also cultured with 10 % Radix Astragali containing serum; the expressions of c-met mRNA and protein were detected after 24- and 48-hour culture.Results: Compared with the normal control group, expression of c-met mRNA in the high glucose group was significantly increased after 12-hour culture (P<0.05), arriving at the peak after 24-hour culture (P<0.01). The level of TGF-β1 mRNA was higher in the high glucose group than that in the normal control group after 24-hour culture (P<0.05), arriving at the peak after 96-hour culture (P<0.01). Forty-eight hours after treating with 10% Radix Astragali containing serum, the levels of c-met mRNA and protein in fibroblasts were increased, and were higher than those in the high glucose group (P<0.01, P<0.05).Conclusion: High glucose can induce the expressions of c-met mRNA and protein in earlier period, and then inhibit the expressions. Radix Astragali can up-regulate the expressions of c-met mRNA and protein of human kidney fibroblasts, which may be one of its action mechanisms in delaying the progression of diabetic nephropathy.
Maze and Regression of the Mainstream Culture in the Context of the Multi-cultural Impact
Guangbo Mou
Asian Social Science , 2010, DOI: 10.5539/ass.v6n6p175
Abstract: This text discusses the five aspects that the mainstream culture has lost itself in the value of the university students in the context of the multi-cultural background. It points out that the maze of the mainstream culture has reached a serious degree. It is a matter of urgency to rescue the mainstream culture and make it revive. This article defines the legal basis of constructing the mainstream culture, the orientation of the construction and the standard of socialist value so that the connotation of the mainstream culture will be more specific and the outline of the mainstream culture will be clearer, as will play an active role in promoting the construction and development of the mainstream culture.
Advices about College Underachievers’ Educational Transformation
Guangbo Mou
Asian Culture and History , 2010, DOI: 10.5539/ach.v2n2p117
Abstract: College underachievers’ educational transformation is the important work to comprehensively cultivate the builders and successors of the socialism with Chinese characteristics, but a hard, sensitive, and complex work. Starting from the root of this problem, this article puts forward the “people-oriented” educational concept and research method, explores the work art of underachievers’ educational transformation, in order to comprehensively enhance the effect of educational transformation.
The Positive Significance of Studying the College Campus Sub-culture
Guangbo Mou
Asian Social Science , 2010, DOI: 10.5539/ass.v6n5p106
Abstract: This paper tries to explore the three aspects of the root causes of subculture, its characteristics and manifestations to find the positive significance that the sub-culture inherently has in favor of the construction of the mainstream culture. It suggests making correct use of the positive factors of the campus subcultures, guiding the healthy development of campus subcultures, strengthening the construction of the campus subculture to promote mainstream school culture.
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