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1.
基于因素敏感性水平的边际油田开发模糊风险分析   总被引:3,自引:0,他引:3  
海上油田开发投资大时间长,并伴随着相当大的不确定性和风险.尤其是边际油田的开发,其投资风险更不容忽视.分析了海上油田开发的不确定性因素,在敏感性分析的基础上,定义了不确定性参数对评价指标的敏感度.利用模糊风险分析,确定了方案的风险度,对开发方案的风险程度进行了定量分析,为方案的选择提供了决策依据.对某一海上边际油田的开发进行了示例分析,计算结果表明,边际油田的开发具有很高的风险,而投资费用、石油价格以及可采储量的不确定性是引起开发风险的主要因素.  相似文献   

2.
一种水驱开发效果评价方法在辽河油田的应用   总被引:6,自引:0,他引:6  
针对辽河油区不同类型注水开发油藏的地质特征、开发特点和评价指标分析 ,利用灰色系统理论 ,建立了油藏水驱开发效果的综合评价参数和指标 ,对不同类型油田的开发效果进行了综合评价 ,对不同开发效果的水驱开发油田提出了开发调整建议 ,为该区油田开发决策和改善油田开发效果提供了依据 .  相似文献   

3.
现时的投资环境评价方法评价投资环境时没有考虑不同评价者的不同需要.提出面向评价者的投资环境评价方法,它按一定的标准来灵活确定影响因素指标体系,综合考虑投资环境预测评价和投资环境后评价、投资者的风险类型及风险与效用的关系等因素,可以更好地为投资者的投资决策和各地区投资环境优化提供指导.  相似文献   

4.
为了对油田开发方案进行多因素分析,采用密切值法建立了油田开发方案优选的综合评价指标体系,并针对各影响因素的相对重要性赋予一定权值。实例分析表明,该方法计算简单,可靠。  相似文献   

5.
大庆外围油田储层为低渗透、非均质性强、伴有裂缝发育的储层,因而其储层评价是一个复杂的、多重因素参与的评价过程.利用灰色关联分析对10个储层地质和开发参数进行定量评价,确定权重系数和综合评价招标,从综合的角度分析各个参与评价的参数,确定了适合低渗透裂缝储层特征的定量分类方法,可以有效指导低渗透油田的开发调整.  相似文献   

6.
油田水驱开发效果评价与预警模型研究   总被引:1,自引:0,他引:1  
为确保油田水驱开发的科学与高效发展,建立油田水驱开发效果评价与预警管理机制非常必要。采用层次分析和模糊综合评判对油田水驱开发效果进行综合评价,在综合评价的基础上,设计基于人工神经网络的油田水驱开发效果预警模型,并结合算例对模型进行验证。模型与实际吻合较好。  相似文献   

7.
为了对我国主要低渗透油田进行综合评价,确定开发顺序,通过建立低渗透油田评价指标体系,利用模糊综合评价方法构建模糊隶属度矩阵,在对各油田单项指标评价的基础上,得到各个油田的模糊综合评价值,评价值高的低渗透油田优先开发,从而确定今后的勘探开发顺序.对我国8个低渗透油田进行了实证分析和测算,评价的最终结果是可行和有效的.  相似文献   

8.
断层封闭性问题受多种地质因素的影响和控制.以陈堡油田为例,提取多种影响断层封闭性的主控因素,应用改进的模糊综合评判方法对断层的封闭性进行评价,在各因素权重系数的求取过程中应用权的最小平方法,避开了一致性检验.评价结果表明该油田主要断层封闭性评价是可靠的,为下一步勘探开发提供了科学依据.  相似文献   

9.
本文提出了一套油田开发投资决策分析方法,其内容包括:油田开发投资效果评价指标体系;不同类型指标的统一计量方法;评价指标的加权,综合效果的计算方法,文中还给出了一个实例。  相似文献   

10.
首先,运用专家意见综合评分法对房地产项目风险进行了定量评价,找出了10项风险因素并分别计算了风险权重.然后,运用耗散结构理论将这些风险因素和权重值分别作为影响房地产项目耗散结构形成的熵流因素和因素权重,通过建立并分析项目管理耗散结构模型,提出项目管理熵流管理策略思想,同时根据风险权重的分析计算和熵流因素的排名高低,得出了在房地产开发项目管理中的一些有益启示.  相似文献   

11.
Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.  相似文献   

12.
何延凌 《科技信息》2008,(4):258-258
Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women's language from these perspectives: pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women's language, more attention should be paid to language use in social context. What's more, the linguistic phenomena in a speaking community can be understood more thoroughly.  相似文献   

13.
理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。  相似文献   

14.
As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.  相似文献   

15.
正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-  相似文献   

16.
We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-  相似文献   

17.
正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that  相似文献   

18.
For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the  相似文献   

19.
Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of  相似文献   

20.
<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with  相似文献   

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