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旅游者目的地选择模式的构建 被引量:3
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作者 卞显红 《现代经济探讨》 北大核心 2003年第9期67-70,共4页
该研究基于Lancaster最初关于消费者分析———产品特性方法的研究,及由Koppelman构建的消费者交通规划方法,构建了旅游者目的地选择模式。此模式中,旅游者与旅游产品的特性在旅游者目的地选择过程中起着重要作用。
关键词 旅游者 旅游产品 计量经济学 目的地选择 产品特性方法 消费者交通规划方法 旅游消费
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The influence of high-yield-water characteristics on productivity of CBM wells and expulsion and production method carried out in Yanchuannan block of the Ordos basin, China 被引量:2
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作者 Xing-Long ZHAO Zu-Wei XU +2 位作者 Da-Zhen TANG Hao XU Shu TAO 《Journal of Coal Science & Engineering(China)》 2013年第4期514-521,共8页
In order to further study the influence of high-yield-water on the productivity of CBM (coalbed methane) wells and the expulsion and production method carried out in CBM wells, by means of analyzing and researching ... In order to further study the influence of high-yield-water on the productivity of CBM (coalbed methane) wells and the expulsion and production method carried out in CBM wells, by means of analyzing and researching production characteris- tics and geologic condition of the CBM wells with high water yield in Yanchuannan block located at the eastern margin of Or- dos basin, the mechanism of high water yield decreasing the productivity of CBM well was discussed, and the expulsion and production method for this type of CBM well was proposed. The results show that high water yield would decrease the produc- tivity of CBM wells, and the mechanism is: first, in some circumstances, high water yield could reflect that there was dissipa- tion during the process of coalbed methane reservoir forming, which would lower the gas saturation of coal gas reservoir and reduce the productivity of CBM well; second, a large quantity of coalbed methane dissipated in the form of solution gas, caus- ing the practical reservoir pressure when gas appeared in casing to be lower than critical desorption pressure of the coal bed; finally, the CBM well with high water yield would have higher requirements of discharge and mining installation, system and continuity, and any link with problems would have a great impact on the well's productivity and would increase the difficulty of discharge and mining. In the case of wells with high water yield, the key is to select applicable discharge and mining installa- tion, which should be able to make the bottom hole flowing pressure decline smoothly and fast, and make the wells produce gas as quickly as possible but able to slow down the rate of discharge and mining properly when gas has appeared. In addition, in view of the CBM wells with high water yield, an installation lectotype method based on Darcy's law was proposed, which was found with good accuracy and practicability through field application. 展开更多
关键词 Ordos basin Yanchuannan block CBM high water yield influence on productivity expulsion and productionmethod installation lectotype
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