多杯等流分离器内气液两相流动规律的研究
发布时间：2019-03-02 11:00
【摘要】：在石油行业中,两相流的研究是一个国内外重要的研究课题,多数油气井不可避免的出现气液或者油气水的多相混合流动,因此在气井举升过程中,对于垂直管气液两相流的研究有着极为重要的实际意义。而其中一个重要的目的就是解决气液的井下分离问题,随着油田的不断开发,气相对油井的影响越来越明显,气体也是造成抽油机泵效率较低的重要原因。例如有些复杂断块油气藏,原始气油比高达150-2003 3m/m,部分极其严重的井可达到20003 3m/m。只有降低进入泵的气体的量才能有效的提高泵效率。所以,井下分离器技术的研究是提高泵效的方法之一。皇冠型多杯等流分离器是以油气密度差为基础,通过延长气液混合物在沉降杯内的停留时间,降低进入泵的气体的量来提高分离器的脱气效率。本实验室建立一个模拟井下分离器的实验模型,通过对分离器的理论水力分析和试验模型研究两方面进行,在实验结果的基础上,对多杯等流分离器的诸多结构提出改进建议。例如调整中心管内的流量以促进气泡群的形成,增大分离效率。本课题实验研究采用理论分析和模型相结合的方法,查阅文献学习气液分离技术和它在井下气液分离领域中的应用,深入研究了垂直管中气液两相流动的特点和气泡的运动特性。在东北石油大学特种实验室内设计、搭建了一套模拟井下气液分离器的实验装置。利用高速摄像机连续记录不同流量下沉降杯内气泡的运动情况,分析气泡运动参数,以此为依据,提出气液分离器的多个结构的改进方案。增大沉降杯底部瓦棱结构的倾斜角度,调节沉降杯流量促使气泡群的产生。
[Abstract]:In the petroleum industry, the study of two-phase flow is an important research subject at home and abroad, most oil and gas wells inevitably appear gas-liquid or oil-gas-water multiphase mixed flow, so in the process of gas well lifting, It is of great practical significance for the study of gas-liquid two-phase flow in vertical tubes. One of the important purposes is to solve the problem of downhole gas-liquid separation. With the development of oil field, the influence of gas on oil well becomes more and more obvious, and gas is also an important reason for the low efficiency of pumping unit pump. For example, in some complex fault block reservoirs, the original gas-oil ratio is as high as 150 m / m, and some extremely serious wells can reach 20003 m / m 路m ~ (- 1). Only reduce the amount of gas into the pump can effectively improve the pump efficiency. Therefore, the study of downhole separator technology is one of the methods to improve pump efficiency. Crown multi-cup isocurrent separator is based on the difference of oil and gas density. The degassing efficiency of the separator is improved by prolonging the residence time of gas-liquid mixture in the settling cup and reducing the amount of gas entering the pump. The laboratory established an experimental model to simulate the downhole separator. Through the theoretical hydraulic analysis and the experimental model study of the separator, on the basis of the experimental results, some suggestions for improving the structure of the multi-cup equi-flow separator were put forward. For example, adjust the flow rate in the central tube to promote the formation of bubble groups and increase the separation efficiency. This paper adopts the method of combining theoretical analysis and model to study the technology of gas-liquid separation and its application in the field of downhole gas-liquid separation. The characteristics of gas-liquid two-phase flow and bubble motion in vertical tubes are studied. A set of experimental equipment for simulating downhole gas-liquid separator was designed and built in the Special Laboratory of Northeastern Petroleum University. Based on the continuous recording of bubble motion in the settling cup by high-speed camera at different flow rates, the improvement scheme of several structures of gas-liquid separator is put forward on the basis of the analysis of bubble motion parameters. Increasing the inclined angle of the flange structure at the bottom of the settling cup and adjusting the flow rate of the settling cup to promote the formation of the bubble group.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE931
本文编号：2432987
[Abstract]:In the petroleum industry, the study of two-phase flow is an important research subject at home and abroad, most oil and gas wells inevitably appear gas-liquid or oil-gas-water multiphase mixed flow, so in the process of gas well lifting, It is of great practical significance for the study of gas-liquid two-phase flow in vertical tubes. One of the important purposes is to solve the problem of downhole gas-liquid separation. With the development of oil field, the influence of gas on oil well becomes more and more obvious, and gas is also an important reason for the low efficiency of pumping unit pump. For example, in some complex fault block reservoirs, the original gas-oil ratio is as high as 150 m / m, and some extremely serious wells can reach 20003 m / m 路m ~ (- 1). Only reduce the amount of gas into the pump can effectively improve the pump efficiency. Therefore, the study of downhole separator technology is one of the methods to improve pump efficiency. Crown multi-cup isocurrent separator is based on the difference of oil and gas density. The degassing efficiency of the separator is improved by prolonging the residence time of gas-liquid mixture in the settling cup and reducing the amount of gas entering the pump. The laboratory established an experimental model to simulate the downhole separator. Through the theoretical hydraulic analysis and the experimental model study of the separator, on the basis of the experimental results, some suggestions for improving the structure of the multi-cup equi-flow separator were put forward. For example, adjust the flow rate in the central tube to promote the formation of bubble groups and increase the separation efficiency. This paper adopts the method of combining theoretical analysis and model to study the technology of gas-liquid separation and its application in the field of downhole gas-liquid separation. The characteristics of gas-liquid two-phase flow and bubble motion in vertical tubes are studied. A set of experimental equipment for simulating downhole gas-liquid separator was designed and built in the Special Laboratory of Northeastern Petroleum University. Based on the continuous recording of bubble motion in the settling cup by high-speed camera at different flow rates, the improvement scheme of several structures of gas-liquid separator is put forward on the basis of the analysis of bubble motion parameters. Increasing the inclined angle of the flange structure at the bottom of the settling cup and adjusting the flow rate of the settling cup to promote the formation of the bubble group.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE931
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相关期刊论文 前1条
1 杨树人;汪岩;王春生;张淑敏;;多杯等流型气锚的水力设计[J];大庆石油学院学报;2006年03期
相关博士学位论文 前1条
1 朱丽;含液多相体系中气泡聚并行为的研究[D];天津大学;2004年
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