油井生产杆管系统优化研究

发布时间：2018-02-25 01:23

本文关键词： 优化有杆抽油油杆油管程序设计　出处：《长江大学》2015年硕士论文　论文类型：学位论文

【摘要】：在油井开采过程中,由于生产杆管(包括油杆、油管)受各种载荷的作用并承受着复杂的工作环境如地下流体的腐蚀性等,这些情况都极容易造成生产杆管的失效。杆管失效包括抽油杆的断裂或断脱、油管的脱扣、杆管的腐蚀、杆管的偏磨等一系列对油气开采不利的现象,这些现象会导致油杆、油管的寿命降低。生产杆管的失效或提早报废不仅严重影响到了油井的产液量,也增加了修井作业及更换的费用,最终导致原油开采成本的上升。为解决上述问题,应该对油井生产杆管系统进行优化研究,选择出尽可能延长油杆、油管使用寿命的优选方案。针对工作过程中会接触腐蚀性流体的杆管,在选择油杆及油管材质时应选择防腐的杆管材质,而对于几乎不具腐蚀性的油井应根据其油层的深度及载荷进行杆管材质选择；针对杆管的偏磨现象,应分别对油管、油杆进行应力分析,选择最小抗拉强度大于油杆、油管所受最大应力的管杆,保证井下工具都能安全有效的工作。本文主要内容包括四部分：第一部分对生产杆管设计不当造成的影响进行了分析,指出对生产杆管进行优选的迫切性及重要性；第二部分分析了油管、抽油杆在上下往复运动中的受力情况,并建立了杆管的最大、最小载荷的模型,根据建立的载荷及应力模型分析了生产参数对油井载荷的影响；第三部分是通过分析油井的流入动态,确定了油井的产量与井底流压的关系,给出了下泵深度计算方法和抽汲参数的选取原则,给出了油管的设计方法并根据等强度原则对油杆的进行了设计；第四部分根据第三部分介绍的设计理论,运用Visual Basic语言编制了油井生产杆管系统优化研究软件,该软件能实现的功能包括根据已知数据绘制IPR曲线、确定下泵深度、据油井预测产能设计抽汲参数(泵径、冲程、冲次等)、油管优化、油杆优化五部分。
[Abstract]:In the process of oil well production, the production rod and pipe (including oil rod and tubing) are subjected to various loads and complicated working environment, such as corrosion of underground fluid, etc. The failure of the rod and pipe includes the breakage or breakage of the sucker rod, the release of the oil pipe, the corrosion of the rod and pipe, the partial wear of the rod and pipe, and so on. These phenomena will lead to the oil rod. The life of tubing is reduced. The failure or early scrapping of production rod pipes not only seriously affects the fluid production of oil wells, but also increases the cost of workover and replacement, which ultimately leads to the increase of crude oil production cost. It is necessary to optimize the production rod and pipe system of oil well, and select the optimal selection scheme that can prolong the service life of oil rod and tubing as far as possible. In selecting the oil rod and tubing material, the anticorrosive material of the rod and pipe should be chosen, and the material of the rod and pipe should be selected according to the depth and load of the oil layer for the oil well that is almost non-corrosive, and the tubing should be separately used for the wear phenomenon of the rod and pipe. For the stress analysis of the oil rod, the pipe rod with the minimum tensile strength greater than the oil rod and the maximum stress on the tubing is selected. The main contents of this paper include four parts: the first part analyzes the influence caused by improper design of the production rod and pipe, and points out the urgency and importance of the optimal selection of the production rod and pipe; In the second part, the stress of tubing and sucker rod in reciprocating motion is analyzed, and the model of maximum and minimum load of rod and tube is established. The influence of production parameters on the load of oil well is analyzed according to the established load and stress model. In the third part, by analyzing the inflow performance of the well, the relationship between the production rate of the well and the bottom-hole flow pressure is determined, and the method of calculating the depth of the down-pump and the selection principle of the swabbing parameters are given. The design method of tubing is given and the oil rod is designed according to the principle of equal strength. 4th, according to the design theory introduced in the third part, the optimization research software of oil well production rod and pipe system is compiled by Visual Basic language. The functions of the software include drawing the IPR curve according to the known data, determining the pump depth, designing swabbing parameters (pump diameter, stroke, impingement, tubing optimization, oil rod optimization) according to the predicted productivity of oil well.
【学位授予单位】：长江大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE93

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