全电动井下地层流体智能控制装置研究

发布时间：2018-05-06 21:45

本文选题：智能完井 + 地层流体控制　；参考：《西安石油大学》2015年硕士论文

【摘要】：智能完井技术能控制同一井眼不同地层或层段的流体,从而实现油气藏的有选择、有控制的开采,不仅能提高单井原油产量,而且能最终提高油田的采收率。智能完井在国外已有十多年的应用实践,但国内目前尚无成熟的智能完井技术。针对国内小井眼井井下地层流体控制的迫切需要,研制一种能在''521井眼中下入的井下流体控制装置,其应用前景广阔。本文分析了小井眼的井下空间限制特性,按照''521井眼的常规结构,设计了一种能在''521井眼中下入的井下流体控制装置(简称滑套阀)。该装置采用电机驱动,其结构形式为滑套——阀筒形式,工作方式为连续流体控制。设计了相应的执行机构驱动电路,制成了一套滑套阀模型样机。按照井下测控要求,完成了井下温度、压力、电机参数等测量模块的电路设计和数据采集处理软件设计,并进行了测量模块的性能测试。基于差动变压器原理,自主设计、加工制作了阀门开度传感器,进行了温度特性测试,并提出了其温度补偿方法。按照地面监控系统与井下节点的通信需求,设计了基于CAN总线的全电动智能井通信系统,定义了其数据帧结构,完成了其软硬件设计,制成了井口节点及具有测量、控制和通信功能的井下智能节点,完成了地面监控系统的初步设计。对井下智能节点与井口节点的联合测试表明:地面监控系统能实时获取地层测量参数,测量及通信功能满足设计要求;能实现滑套阀的远程遥控,滑套阀动作灵活,控制可靠,开度测量反馈信号准确,达到了预期设计目标。这些研究工作为进一步研究全电动智能井技术提供了有益参考。按照所作的设计,参考所制成的模型样机,目前正在进行原理样机的机械加工、装配和调试等研究工作。
[Abstract]:The intelligent completion technology can control the fluid in different formation or interval of the same hole, thus realize the selective and controlled exploitation of oil and gas reservoir, which can not only increase the crude oil production of single well, but also improve the oil recovery finally. Intelligent well completion has been applied in foreign countries for more than ten years, but there is no mature intelligent completion technology in China. In view of the urgent need of downhole formation fluid control in small borehole wells in China, a downhole fluid control device which can be used in the hole of Yinjian 521 well is developed, which has a broad application prospect. In this paper, the space limitation characteristics of small hole are analyzed, and a downhole fluid control device (referred to as sliding-casing valve) is designed according to the conventional structure of Yanzhi521 well. The device is driven by motor, its structure form is sliding sleeve-valve tube, and its working mode is continuous fluid control. The driving circuit of the actuator is designed and a prototype of the sliding sleeve valve model is made. According to the requirements of underground measurement and control, the circuit design and data acquisition and processing software design of underground temperature, pressure, motor parameters and other measurement modules are completed, and the performance of the measurement module is tested. Based on the principle of differential transformer, the valve opening sensor is designed and manufactured independently, the temperature characteristic is tested, and the method of temperature compensation is put forward. According to the communication requirement between ground monitoring system and underground node, an all-electric intelligent well communication system based on CAN bus is designed, its data frame structure is defined, its software and hardware design is completed, and the well head node and its measurement are made. Control and communication functions of the underground intelligent node, completed the preliminary design of the ground monitoring system. The joint test of intelligent node and wellhead node shows that the ground monitoring system can obtain the parameters of formation measurement in real time, and the functions of measurement and communication can meet the design requirements, the remote control of sliding sleeve valve can be realized, the sliding sleeve valve can be operated flexibly, and the control is reliable. The feedback signal of open-degree measurement is accurate and achieves the expected design goal. These studies provide a useful reference for the further study of all-electric intelligent well technology. According to the design and reference of the model prototype, the research work of machining, assembling and debugging of the principle prototype is being carried out at present.
【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE928;TP273.5

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