底水油藏特高含水期剩余油模式及开发对策

准确表征剩余油是特高含水期油藏研究重点，而目前与底水油藏有关的剩余油研究甚少。以NF25底水油藏为例开展深入研究，目标油藏剩余油分布主要受构造、夹层、流动单元、韵律、开发井网及井型等因素控制，剩余油分布归纳为“2高”（构造高部位、高层位剩余油富集）、“3低”（层内低渗段、层间低渗层、井网控制程度低区域剩余油富集）、“4区”（水锥周围区、夹层遮挡区、差流动单元区、流动单元过渡区剩余油富集）、“5态”（构造主控“屋脊油”、夹层主控“屋檐油、屋顶油”、韵律主控“三明治、工字型”、井网主控“孤岛油、朵状油”、流动单元主控“无规则”）。分析可知不同开发阶段，剩余油分布状态存在较大差异，其对应的挖潜策略也有较大差别。

Structural behaviors of steel roof truss exposed to pool fire

Experimental research was conducted to study the structural behaviors of a steel roof truss model without fire-proof coating under pool fire conditions. The data of temperature distribution and displacements of typical members were obtained. It is found that the temperature distribution of environment inside the structure, which is found to be in accordance with the multi-zone model with height, has a decisive effect on the tempera^tre evolution of steel members. Besides, it can also be observed that due to the restriction and coordination among the truss members in the localized fire, the maximum relative deflection, which occurs at the mid-span of the top chord, is relatively slight and has not exceeded 1 mm under experimental conditions. On the other hand, the column experiences a notable thermal expansion during the test. Then, a finite element model is presented and validated by the test results.

港星暑期打工记

又到了放暑假的时候了,除了做一些必要的功课外,各位学生朋友是如何打发漫长假期的呢?其实,香港娱乐圈有很多艺人在暑假就不乏外出打工的经历,我们一起来看看他们是如何走向社会的。