潜油电泵采油系统井下设备效率研究

发布时间：2018-08-06 16:41

【摘要】：潜油电泵是采油中很重要的举升设备,具有泵效高,排量范围大,自动化程度高等特点。潜油电泵采油能提高油气井采液速率、实现油气井持续稳产。但是潜油电泵在运行过程中,如果井下电泵机组与生产参数匹配不当,则会出现泵效偏离高效区、不能在最高效率点工作。因此,研究潜油电泵井井下设备优化设计对潜油电泵合理、高效运行有很重要的意义。本文充分调研了国内外潜油电泵技术理论和应用现状,在对油井流入、流出动态,井筒多相流理论,潜油电泵特性曲线进行研究的基础上,进行了潜油电泵井下设备优选,以井下效率最高为目标函数,运用节点分析方法,研究了潜油电泵井下设备的优化设计方法,以实现井下设备的高效运行。文中考虑潜油电泵生产的供产协调关系,以泵型、潜油电机、电缆参数为设计变量,以三者耦合下的井下效率最高为目标函数,综合考虑泵径、下泵深度、电泵级数、产液量等约束条件,研究了井下设备之间关系,优选潜油电泵,潜油电机和电缆。本文考虑了所选的6种泵,51种电机,188种井下机组的可能性,分别计算了每种机组的井下效率。结果显示:井下效率高低与井下机组的选择有关,即188种井下机组就有188个井下设备效率。最后,在所选最优的井下机组的基础上,对影响井下设备效率的因素做了具体的分析。
[Abstract]:Electric submersible pump is an important lifting equipment in oil recovery, which has the characteristics of high pump efficiency, large displacement range and high degree of automation. The electric submersible pump can improve the fluid production rate of oil and gas wells and realize the sustainable and stable production of oil and gas wells. However, in the operation of submersible electric pump, if the underground electric pump unit and the production parameters are not matched properly, the pump efficiency will deviate from the high efficiency zone and can not work at the highest efficiency point. Therefore, it is very important to study the optimization design of submersible electric pump well equipment for the submersible electric pump to operate reasonably and efficiently. In this paper, the theory and application status of submersible electric pump at home and abroad are fully investigated. On the basis of the research on oil well inflow, outflow performance, wellbore multiphase flow theory and submersible pump characteristic curve, the submersible electric pump downhole equipment is optimized. Taking the highest downhole efficiency as the objective function and using the nodal analysis method, the optimization design method of the submersible electric pump downhole equipment is studied in order to realize the efficient operation of the downhole equipment. In this paper, the production coordination relationship of submersible electric pump is considered. The parameters of pump, submersible motor and cable are taken as design variables, and the maximum downhole efficiency under the three coupling conditions is taken as objective function, and the pump diameter, pump depth and electric pump series are considered synthetically. The relationship between underground equipments, submersible electric pump, submersible motor and cable are studied. In this paper, the possibility of selecting 6 kinds of pumps and 51 kinds of motors and 188 kinds of downhole units are considered, and the downhole efficiency of each type of unit is calculated respectively. The results show that the downhole efficiency is related to the selection of downhole units, that is, 188 downhole units have 188 downhole equipment efficiency. Finally, on the basis of selecting the optimal downhole unit, the factors affecting the downhole equipment efficiency are analyzed concretely.
【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE933.3

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