连续油管钻磨桥塞工艺仿真及钻磨参数优化研究

发布时间：2019-02-15 10:56

【摘要】：这几年,随着一般油气藏的改造及非常规油气藏开发需求的增加,连续油管钻磨桥塞钻磨参数的优化问题得到了广泛的研究。连续油管具有高强度、高韧性特点,与传统油管作业相比,作业周期短、工作效率高、运输方便,特别是在特殊井下工况作业时优点明显。钻速方程和磨损方程的分析和参数优化为连续油管下入深度、施加钻压、输送介质排量的分析和评价提供理论依据,确保连续油管各种井下作业安全可靠。本文选取连续油管钻磨桥塞为研究对象,基于切削原理和弹塑性力学,针对钻头及桥塞整体空间结构,对复合桥塞专用钻头钻磨复合桥塞的过程进行了受力分析,并进行了仿真计算,得出了桥塞在钻压及扭矩作用下的数值分析结果;考虑钻压、钻速、桥塞特性、水力因素及螺杆钻具的磨损等主要影响因素,建立了具体的钻速方程和钻头磨损方程;在钻磨单个桥塞的情况下,由于现场钻磨桥塞施工中的各种因素的限制,钻压和排量是钻进速度的主要可控变量,针对这一现状分析了钻压和排量对钻速的影响;在分层作业中,需要一趟管柱钻磨多个桥塞,在该工况下,分析了钻压与钻磨时间、排量与钻磨时间、钻压与最大钻塞长度之间的关系,从而确定了多塞钻磨钻压与排量的优选方法。根据钻磨桥塞参数优化分析的需要,对桥塞主要结构材料进行了力学性能测试,试验对象为桥塞的主要支撑结构材料,以压缩试验和扭转试验为主,确定了磨损方程中的不同工况下的单塞及单趟管柱钻磨参数优化,得出了不同状态下的钻磨时间和极限钻磨深度。
[Abstract]:In the past few years, with the improvement of the general oil and gas reservoir and the increase of the development demand of unconventional oil and gas reservoirs, the optimization of the drilling and grinding parameters of the continuous tubing drilling and grinding bridge is widely studied. the continuous oil pipe has the characteristics of high strength and high toughness, the operation period is short, the working efficiency is high and the transportation is convenient compared with the conventional oil pipe operation, and the continuous oil pipe has the advantages of obvious advantages in special underground working conditions. The analysis and parameters of the drilling speed equation and the wear equation are optimized to provide a theoretical basis for the analysis and evaluation of the depth of the oil in the continuous oil pipe, the application of the drilling pressure and the displacement of the conveying medium, and the safety and reliability of various underground operations of the continuous oil pipe are ensured. Based on the cutting principle and the elastic-plastic mechanics, the force analysis of the composite bridge plug is carried out based on the cutting principle and the elastic-plastic mechanics, and the simulation calculation is carried out. The numerical results of the bridge plug under the action of drilling pressure and torque are obtained. The main factors such as the drilling pressure, the drilling speed, the characteristics of the bridge plug, the hydraulic factors and the wear of the screw drilling tool are considered, and the specific drilling speed equation and the bit wear equation are established; in the case of a single bridge plug for drilling, Due to the limitation of various factors in the construction of the on-site drilling and grinding bridge plug, the drilling pressure and the displacement are the main controllable variable of the drilling speed, and the influence of the drilling pressure and the displacement on the drilling speed is analyzed for the present condition; in the layered operation, a plurality of bridge plugs are required to be drilled through a pipe column, The relationship between the drilling pressure and the drilling time, the displacement and the drilling time, the drilling pressure and the length of the maximum drilling plug is analyzed, and the preferred method for the pressure and displacement of the multi-plug drill is determined. According to the need of the optimization and analysis of the parameters of the bridge plug, the main structural materials of the bridge plug are tested. The test object is the main supporting structure of the bridge plug, and the compression test and the torsion test are the main materials. The drilling and grinding parameters of single-plug and single-pass pipe under different working conditions in the wear equation are optimized, and the drilling time and the limit drilling depth under different conditions are obtained.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE921

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