Improvement of the One-dimensional Vertical Advection-diffusion Model in Seawater

The classical 1-D vertical advection-diffusion model was improved in this work. The main advantages of the improved model over the previous one are: 1) The applicable condition of the 1-D model is made clear in the improved model, in that it is substantively applicable only to a vertical domain on which two end-member water masses are mixing. 2) The substitution of parameter f(z) in the equation of the classical 1-D model with end-member fraction f 1z makes the model more precisely and easily solved. 3) All the terms in the improved model equation have specific physical meanings, which makes the model easily understood. Practical application of the improved model to predict the vertical profiles of dissolved oxygen and micronutrients in abyssal ocean water of the North Pacific proved that the improvement of the 1-D advection-diffusion model is successful and practicable.

盐岩矿床水平储库单井后退式建造技术与多场耦合理论

相比于垂直储库而言,在层状盐岩矿床中建造水平储库,可以避开层理状夹层与界面,降低了储存油气泄露的危险。给出水平储库单井后退式对流溶解的技术背景和建造方法;提出单层星型、多层错位布置的层状盐岩矿床大型水平储库群建造方案;在建立的固–流–热–传质多场耦合作用理论基础上,对单井后退式对流溶解水平储库建造过程进行数值模拟。结果表明:水平储库单井后退式控制溶解建造技术是一种经济高效的盐岩储气库建造方法。在层状盐岩矿床中采用单井后退式控制溶解建造方法建造大型水平储库群,可极大提升我国能源储库建设的规模与储存能力。按照多层星型状错位布置,两层盐岩层中一组库群净容积可达到1.36×10^(7)m^(3)以上。为保证水平溶腔的稳定性和对盐岩层空间的最大利用,在储气库的设计阶段,应在保证溶腔可靠性和密闭性的前提下尽可能将管柱系统布置在水平盐岩层较低层位。研究结果可以对国内盐岩储气库工程建设提供技术参考,有效推进中国储气库建设进程。