Estimating the expected value of multiple prospects in bidding blocks

In recent years,China has accelerated the reform of its oil and gas management system,especially in competitive transfer of mining rights.Evaluating the expected value(EV)of lease blocks is crucial for the bidding decision of oil companies.When bidding for a block with several individual prospects,the simple addition of each prospect EV usually leads to overly high and optimistic resource volume and value estimates.For the assessment of the EV of a multi-prospect block,two factors should be considered.Firstly,the geological setting of the prospects,including their relative spatial relationship,their chance of geological success,their resources and their geological dependency,etc.The second factor is the exploration strategy of oil companies,concerned with the dry hole tolerance,the committed wells and the drilling priorities for the prospects,etc.A probabilistic method to assess the EV of a multi-prospect block is proposed,which proves to be favorable for formulating a bidding strategy for oil companies.In addition,a case study on two specific blocks with several prospects is presented to illustrate the effect of the above mentioned factors on the EV.

Research on the Countermeasures of Smart Tourism Construction in Sanya Under the Background of Free Trade Port Construction

By analyzing the current situation of smart tourism construction in combination with the actual tourism situation in Sanya,this study aims to find out the problems existing in the current smart tourism construction and understand the various factors affecting the smart tourism construction in Sanya.Then,relevant theories and practical applications were used to study the ways to carry out smart tourism construction with the help of policy,location,and other advantages to meet the needs of the development of the times.Based on the study,practical countermeasures and suggestions were given to provide reference for the construction of smart tourism,ensure the continuous improvement of smart tourism construction,and help the upgrading and transformation of tourism in Sanya.Based on the analysis of the construction and data of smart tourism and tourism informatization in Sanya,this article has formed a useful method to help Sanya build an international tourist island and a modern smart tourism city using the Hainan Free Trade Port construction policy.

缠绕管换热器性能数值模拟研究

层间距以及管间距不仅影响换热器的传热性能,而且影响换热器的几何结构。本文采用FloEFD软件数值模拟研究了三种不同层间距(4 mm, 7 mm, 10 mm)以及管间距(15 mm, 18 mm, 21 mm)对缠绕管换热器的换热性能的影响。结果表明在不同层间距条件下壳程流体出口温度、壳程流体速度以及壳程压降随着层间距的增加而减小;在不同管间距条件下壳程流体出口温度、壳程流体速度随着管间距的增加而减小而壳程压降随着层间距的增加而增大;采用换热器综合性能评价指标(单位壳程压降)来衡量换热器的传热效果,表明层间距以及管间距越小,换热器综合性能指标最好。研究结果对换热器的设计具有一定的指导意义。