一球多簇压裂滑套的结构设计与分析
发布时间：2018-07-17 03:07
【摘要】：近年来,国内原油新增储量的70%属于低渗透油藏,开采方式、油井生产动态表现出特殊性。如何实现储量的有效动用,大幅提高单井产量是开发非常规油气资源急需解决的问题。本文结合国内外压裂滑套使用现状,分析国内外压裂滑套的工作原理和施工特点,设计出一球多簇分段压裂滑套。该滑套能够在投入一个压裂球的情况下依次打开多个压裂滑套,一次施工可以完成多点压裂操作,大大减少了施工程序,有效降低施工成本。本文主要完成了一球多簇分段压裂滑套的结构设计包括分体式球座压裂滑套和一体式球座压裂滑套,并详细介绍了工具的工作原理,开展了压裂孔的结构优化设计和压裂参数对压裂孔冲蚀影响研究,最后进行了工具的强度分析。主要内容如下:根据国内外压裂工具进行调研,分析不同工具的工作原理以及施工特点,在这些基础之上完成一球多簇分段压裂滑套的结构设计。包括分体式球座压裂滑套和一体式球座压裂滑套,完成各个零部件的三维建模和装配体的建模。完成了一球多簇分段压裂滑套压裂孔的优化设计。结合压裂施工特点,基于计算流体动力学,分析了颗粒的运动轨迹方程以及液固两相流下的冲蚀失效机理。利用Fluent软件建立冲蚀分析的基本模型进行网格划分与基本参数设置,完成了不同压裂孔个数情况下的冲蚀分析,得出最优的压裂孔个数为6个。分析了压裂参数对压裂孔冲蚀的影响研究。包括支撑剂直径、压裂液流量、支撑剂密度和支撑剂浓度对压裂孔冲蚀影响研究,分析了不同参数情况下压裂孔冲蚀了影响规律,仿真结果为现场压裂参数的优选提供了理论基础。采用ANSYS对一球多簇分段压裂滑套进行了强度分析。包括一体式球座压裂滑套和分体式球座压裂滑套的耐压强度,分析了应力集中出现的位置以及产生的原因,结果表明工具的整体耐压70MPa。并对压裂球坐封情况下的受力进行分析,得到内压70MPa条件下,球与球座的受力情况,结果表明压裂球的材料选择合理,球与球座满足压裂施工要求。
[Abstract]:In recent years, 70% of the new reserves of crude oil in China belong to low permeability reservoirs. How to realize the effective production of reserves and increase the production of single well is an urgent problem to be solved in the development of unconventional oil and gas resources. According to the present situation of fracturing sliding sleeve at home and abroad, this paper analyzes the working principle and operation characteristics of fracturing slide sleeve at home and abroad, and designs a ball multi-cluster fracturing slide sleeve. The slider can open multiple fracturing sliders in turn when one fracturing ball is put in one operation. The operation of multi-point fracturing can be completed in one operation and the operation procedure can be greatly reduced and the operation cost can be effectively reduced. In this paper, the structure design of one ball multi-cluster fracturing slide sleeve is completed, including split ball seat fracturing slide sleeve and integrated ball base fracturing slide sleeve, and the working principle of the tool is introduced in detail. The structure optimization design of fracturing hole and the influence of fracturing parameters on the erosion of fracturing hole are studied. Finally, the strength analysis of the tool is carried out. The main contents are as follows: according to the investigation of fracturing tools at home and abroad, this paper analyzes the working principle and operation characteristics of different tools, and completes the structural design of a ball and multi-cluster fracturing sliding sleeve on the basis of these. It includes split ball seat fracturing slide sleeve and integral ball seat fracturing slide sleeve to complete the 3D modeling of each component and assembly. The optimization design of fracturing hole with one ball and multi-cluster fracturing slide casing is completed. Based on the characteristics of fracturing operation and computational fluid dynamics (CFD), the motion trajectory equation of particles and the erosion failure mechanism of liquid-solid two-phase flow are analyzed. The basic model of erosion analysis was established by fluent software, and the basic parameters were set up. The erosion analysis of different fracturing holes was completed, and the optimal number of fracturing holes was 6. The effect of fracturing parameters on fracturing hole erosion is analyzed. Including the influence of proppant diameter, fracturing fluid flow rate, proppant density and proppant concentration on fracturing hole erosion, the influence law of fracturing pore erosion under different parameters is analyzed. The simulation results provide a theoretical basis for the optimization of field fracturing parameters. The strength of multi-cluster fracturing sliding sleeve is analyzed by ANSYS. Including the pressure strength of the integral ball seat fracturing slide sleeve and the split ball seat fracturing slide sleeve, the position of the stress concentration and the cause of the stress concentration are analyzed. The results show that the integral pressure resistance of the tool is 70 MPA. The stress of the ball and the ball pedestal under the internal pressure of 70 MPA is analyzed. The results show that the material selection of the fracturing ball is reasonable and the ball seat meet the requirements of the fracturing operation.
【学位授予单位】：长江大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE934.2
本文编号：2128737
[Abstract]:In recent years, 70% of the new reserves of crude oil in China belong to low permeability reservoirs. How to realize the effective production of reserves and increase the production of single well is an urgent problem to be solved in the development of unconventional oil and gas resources. According to the present situation of fracturing sliding sleeve at home and abroad, this paper analyzes the working principle and operation characteristics of fracturing slide sleeve at home and abroad, and designs a ball multi-cluster fracturing slide sleeve. The slider can open multiple fracturing sliders in turn when one fracturing ball is put in one operation. The operation of multi-point fracturing can be completed in one operation and the operation procedure can be greatly reduced and the operation cost can be effectively reduced. In this paper, the structure design of one ball multi-cluster fracturing slide sleeve is completed, including split ball seat fracturing slide sleeve and integrated ball base fracturing slide sleeve, and the working principle of the tool is introduced in detail. The structure optimization design of fracturing hole and the influence of fracturing parameters on the erosion of fracturing hole are studied. Finally, the strength analysis of the tool is carried out. The main contents are as follows: according to the investigation of fracturing tools at home and abroad, this paper analyzes the working principle and operation characteristics of different tools, and completes the structural design of a ball and multi-cluster fracturing sliding sleeve on the basis of these. It includes split ball seat fracturing slide sleeve and integral ball seat fracturing slide sleeve to complete the 3D modeling of each component and assembly. The optimization design of fracturing hole with one ball and multi-cluster fracturing slide casing is completed. Based on the characteristics of fracturing operation and computational fluid dynamics (CFD), the motion trajectory equation of particles and the erosion failure mechanism of liquid-solid two-phase flow are analyzed. The basic model of erosion analysis was established by fluent software, and the basic parameters were set up. The erosion analysis of different fracturing holes was completed, and the optimal number of fracturing holes was 6. The effect of fracturing parameters on fracturing hole erosion is analyzed. Including the influence of proppant diameter, fracturing fluid flow rate, proppant density and proppant concentration on fracturing hole erosion, the influence law of fracturing pore erosion under different parameters is analyzed. The simulation results provide a theoretical basis for the optimization of field fracturing parameters. The strength of multi-cluster fracturing sliding sleeve is analyzed by ANSYS. Including the pressure strength of the integral ball seat fracturing slide sleeve and the split ball seat fracturing slide sleeve, the position of the stress concentration and the cause of the stress concentration are analyzed. The results show that the integral pressure resistance of the tool is 70 MPA. The stress of the ball and the ball pedestal under the internal pressure of 70 MPA is analyzed. The results show that the material selection of the fracturing ball is reasonable and the ball seat meet the requirements of the fracturing operation.
【学位授予单位】：长江大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE934.2
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