X油田井底流压的变化规律及界限研究

X油田水驱示范区已经达到特高含水期开发阶段,合理的井底流压是保持油井稳产、高产的关键所在,本文对X油田不同井网下井底流压的变化规律和正常变化界限进行了研究,给出了油气水三相渗流时的油井流入动态方程,并计算各井网以及各油井在不同含水率下的油井最低允许流动压力,再结合油井实际生产状况,从而确定各井网及各油井的流压的变化规律及正常变化的界限值。为油井开采提供理论依据和支持。

新媒体时代再论海明威笔下的人物形象

"海明威热"并没有随着时间的流逝而降温,反而愈演愈烈,本文将简要论述在新媒体时代海明威笔下的人物形象,以及他们与海明威本人之间的种种联系。海明威作为战地记者的经历对他的创作产生了很大的影响,他经常会效仿他笔下的人物的做法,尤其是在处理与各种环境发生冲突的方式上。本论文旨在准确捕捉他作品中现实和想象之间的微妙界限。鉴于此,我将针对他作品中的男性和女性人物形象展开论述,并找到两种人物形象间的主要差别,以及他们各自的主要特征。

Changes in Coupled Vibration Frequencies and Modes of Wall-Cavity Systems Induced by Stiffness Variation in the Structure

Problems of fluid structure interactions are governed by a set of fundamental parameters. This work aims at showing through simple examples the changes in natural vibration frequencies and mode shapes for wall-cavity systems when the structural rigidity is modified. Numerical results are constructed using ANSYS software with triangular finite elements for both the fluid （2D acoustic elements） and the solid （plane stress） domains. These former results are compared to proposed analytical expressions, showing an alternative benchmark tool for the analyst. Very rigid wall structures imply in frequencies and mode shapes almost identical to those achieved for an acoustic cavity with Neumann boundary condition at the interface. In this case, the wall behaves as rigid and fluid-structure system mode shapes are similar to those achieved for the uncoupled reservoir case.