智能井井下流入控制阀研究与分析

发布时间：2018-06-14 07:50

本文选题：智能井 + 流入控制阀　；参考：《西南石油大学》2015年硕士论文

【摘要】：智能井技术作为当今世界油田开发的技术前沿,是增加油田采收率的重要技术之一。自上世纪90年代以来,智能井技术在国外得到了广泛的应用,并在提高采收率、减少人员工作量、优化开采方面取得了显著的成绩,但在国内尚处于起步阶段。本文主要是针对智能井井下执行机构进行研究,确切的说包括井下流入控制阀及其井下液压控制部分。本文中主要介绍了流入控制阀的结构设计的具体方案和井下液压控制回路的设计；文中提出了一种能够精确控制节流位置的控制阀和能够在有限控制管线的条件下控制更多层位的液压控制方案。本文的主要研究内容有： (1)根据井下流入控制阀的工作特点,设计了井下流入控制阀的结构,合理的选择井下流入控制阀的开口大小及井下金属密封结构,并通过CAD及Proe软件绘制井下流入控制阀的二维结构和三维模型； (2)根据井下流入控制阀的特点,设计一种用于井下层位选择的方向控制阀,该阀能够将原来由三条管线控制3产层提高为控制12产层。并能利用定量缸能有效的控制井下流入控制阀的节流位置； (3)考虑到井下复杂的工作环境,通过ANSYS对井下元件进行数值分析,对各元件的结构设计提供有效的数据支持。对井下金属密封结构进行分析,探讨影响金属密封的主要因素对金属密封压力的影响；(4)建立井下流入控制阀的流场分析模型,通过ICEM网格划分软件对井下流场模型进行结构化网格划分,并通过CFX流体分析软件对控制阀在不同节流位置,不同压差下进行模拟分析,获取在中性面的速度云图和压力云图。了解流体在通过控制阀时的流动特性,并通过后处理软件获得在不同工况下通过控制阀的流量确定节流位置,压差和流量的关系,计算控制阀的流量系数。
[Abstract]:Intelligent well technology is one of the most important techniques to increase oil recovery as the frontier of oilfield development in the world. Since the 1990s, intelligent well technology has been widely used in foreign countries, and has made remarkable achievements in improving oil recovery, reducing staff workload and optimizing exploitation, but it is still in its infancy in China. This paper mainly focuses on the research of the executive mechanism under the intelligent well, which includes the downhole inflow control valve and its downhole hydraulic control. This paper mainly introduces the structure design of the inflow control valve and the design of the downhole hydraulic control circuit. This paper presents a control valve which can accurately control the throttling position and a hydraulic control scheme which can control more layers under the condition of limited control pipeline. The main contents of this paper are as follows: 1) according to the working characteristics of the downhole inflow control valve, the structure of the downhole inflow control valve is designed, the opening size of the downhole inflow control valve and the underground metal seal structure are reasonably selected. The 2D structure and 3D model of downhole inflow control valve are drawn by CAD and Proe software. 2) according to the characteristics of downhole inflow control valve, a directional control valve is designed for underground layer selection. The valve can control 3 layers from 3 lines to 12 layers. It can effectively control the throttle position of downhole inflow control valve by using quantitative cylinder. Provide effective data support for the structural design of each component. The structure of underground metal seal is analyzed, and the influence of main factors on metal seal pressure is discussed. (4) the flow field analysis model of downhole inflow control valve is established. The downhole flow field model is structured meshed by ICEM software, and the control valve is simulated and analyzed at different throttle position and pressure difference by CFX fluid analysis software, and the velocity cloud and pressure cloud map on neutral surface are obtained. The flow characteristics of the flow through the control valve are understood, and the throttling position, pressure difference and flow rate are determined by the flow rate of the control valve under different working conditions through the post-processing software, and the flow coefficient of the control valve is calculated.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE938

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