【作者】 李恒；

【导师】 张琪；

【作者基本信息】 中国石油大学 ， 油气田开发工程， 2007， 硕士

【摘要】 气井中应用井下气水分离技术可将气井的产出水直接在同井中回注,从而大幅减少水的举升、处理费用,延长高含水气井的经济寿命,也减少产出水带来的环境压力,该技术具有良好的经济效益和环保效果。本文首先对井下气水分离技术的核心部件井下气液分离器展开研究,采用数值模拟、力学模型分析和室内实验的方法对井下气液分离器的分离性能及其影响因素进行了研究,并在此基础上提出了井下气液分离器设计方法,为井下气水分离器的结构参数以及工况参数的优选提供了参考依据。在对目前常见的有杆泵和无杆泵井下气液分离同井注采方案进行调研的基础上,提出了气井井下气液分离同井注采方案的选择依据,为该技术的现场应用提供了基础。针对目前井下气液分离同井注采系统设计方法欠缺的情况,本文在分析电潜泵井下气水分离系统中产出层、管流、电潜泵、分离器以及注入层五个子系统的流动规律及其协调关系的基础上,采用节点分析的方法建立了电潜泵井下气水分离系统设计模型,并给出了计算实例。该设计方法为井下气水分离系统设计提供了依据,对该技术的现场应用具有一定的促进作用。更多还原

【Abstract】 Downhole gas water separation (DGWS) technique, which offers both economical and environmental benefits, can greatly reduce the costs of lifting and treating of the produced water and extend the economic service lives of gas wells with high water cut by directly reinjecting the produced water into the formations of the identical gas wells. The separation efficiency and influential factors of downhole gas liquid separator were studied first in this paper using the computational fluent dynamics, mechanical model analysis and laboratory experiment methods. The design proposal of separator was then developed to provide reference criteria for optimizing structural and operational parameters. The guidelines of the selection of the DGWS production and reinjection scheme were given on the basis of the investigations. The whole system was divided into five subsystems and the flow behavior in each subsystem was studied separately. Designing model for the ESP-DGWS system was then established by using the nodal analysis method, which successfully solved the problem of selection criteria absence for the designing model of the system. A field application example was finally presented to illustrate the designing procedure. This study provided foundation for the candidate well selecting and system designing of the ESP-DGWS technique, and may promote the field application of this new technique.更多还原