新型混合气举方式设计与优化方法研究
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摘要
目前常用的深井气举降压设计与变流压设计方法均具有一定局限性,而针对气举变流压设计方法与降压设计方法结合形成的新型混合气举工艺技术尚未有深入研究。根据新型混合气举方式物理模型,从工作原理出发建立了新型混合气举方式的工艺设计方法和优化方法,并与变流压设计方法、降压设计方法进行了对比分析。结果表明,新型混合气举方式的注气深度和排采能力大多介于降压设计方法和变流压设计方法之间,有时超过变流压设计方法,不仅注气深度增加、排采能力增强,还具有便于地面判断工作阀的级次、气举生产稳定和地面能控制气举阀开闭状况等降压设计方法所具有的优点;新型混合气举方式充分地利用了地面注气压力,提高了气举系统效率,其适用范围亦包含降压设计和变流压设计方法的适用范围。本文研究成果为新型混合气举方式完井管柱优化设计和生产参数优化奠定了理论基础,具有较好的推广应用价值。
At present, the commonly used deep well gas lifting design methods controlled by pressure reduction or flowing pressure have some limitations. However, the new mixed gas lifting technology formed by combining the above two methods is still in the primary study stage. This paper, according to the physical model of the new mixed gas lifting method, establishes the process design and optimization methods based on the working principle, and makes comparison with the variable flowing pressure design method and the pressure reduction design method. The results show that the gas injection depth and drainage capacity of the new mixed gas lifting method are mostly between the pressure reduction design method and the variable flowing pressure design method, sometimes exceeding the variable flowing pressure design method. Besides the increased gas injection depth and the enhanced drainage and production capacity, it also has the advantages of easy to judge the level of working valve on the ground, the stable gas lifting production, and the opening/closing control of gas lifting valve on the ground. The new mixed gas lifting method can fully utilize the surface gas injection pressure, improve the efficiency of gas lifting system, and its application scope also includes that of the pressure reduction design and the variable flowing pressure design method. The research results of this paper lay a theoretical foundation for the optimized design and production parameter optimization of the new mixed gas lifting method, and have good application significance.
At present, the commonly used deep well gas lifting design methods controlled by pressure reduction or flowing pressure have some limitations. However, the new mixed gas lifting technology formed by combining the above two methods is still in the primary study stage. This paper, according to the physical model of the new mixed gas lifting method, establishes the process design and optimization methods based on the working principle, and makes comparison with the variable flowing pressure design method and the pressure reduction design method. The results show that the gas injection depth and drainage capacity of the new mixed gas lifting method are mostly between the pressure reduction design method and the variable flowing pressure design method, sometimes exceeding the variable flowing pressure design method. Besides the increased gas injection depth and the enhanced drainage and production capacity, it also has the advantages of easy to judge the level of working valve on the ground, the stable gas lifting production, and the opening/closing control of gas lifting valve on the ground. The new mixed gas lifting method can fully utilize the surface gas injection pressure, improve the efficiency of gas lifting system, and its application scope also includes that of the pressure reduction design and the variable flowing pressure design method. The research results of this paper lay a theoretical foundation for the optimized design and production parameter optimization of the new mixed gas lifting method, and have good application significance.
引文
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[13] POHLER S A,HOLMES W D,COX S.Annular velocity enhancement with gas lift as a deliquification method for tight gas wells with long completion intervals[R].SPE130256,2010.
[2] 罗威,廖锐全,许冬进,等.气举设计适应性评价新方法:气举工况诊断节点分析法[J].中国海上油气,2016,28(1):114-119.DOI:10.11935/j.issn.1673-1506.2016.01.018.LUO Wei,LIAO Ruiquan,XU Dongjin,et al.A new method for assessing the adaptability of gas lift design:nodal analysis for gas lift operation diagnosis[J].China Offshore Oil and Gas,2016,28(1):114-119.DOI:10.11935/j.issn.1673-1506.2016.01.018.
[3] 布朗K E.升举法采油工艺[M].卷二(上).北京:石油工业出版社,1987:333-337.
[4] 李颖川.采油工程[M].北京:石油工业出版社,2002:71-72.
[5] 张琪.采油工程原理与设计[M].东营:中国石油大学出版社,2006:86-88.
[6] 万邦烈.气举采油技术[M].东营:石油大学出版社,2000:101-108.
[7] Sponsored by the Executive Committee on Training and Development of the American Petroleum Institute Production Department Dellas.Gas lift[M].Book 6 of the Vocational Training Series.Production Department American Petroleum Institute,1984:76-78.
[8] 万仁溥.采油工程手册[M].上册.北京:石油工业出版社,2000:567-572.
[9] LUO Wei,LIAO Ruiquan,XIE Xiangwei,et al.A new continuous gas lift design method with pressure drop for enhancing oil production[J].International journal of Earth Sciences and Engineering,2014,7(2):764-770.
[10] 李军亮,廖锐全,郭新.等压降连续气举优化设计[J].石油天然气学报,2014,36(7):140-143,8-9.LI Junliang,LIAO Ruiquan,GUO Xin.Optimization design of isobaric pressure-drop continuous gas lift[J].Journal of Oil and Gas Technology,2014,36(7):140-143,8-9.
[11] 徐志敏,齐韦林,孙冰恒.让那若尔油田低压井加深注气深度方法研究及优化[J].中国化工贸易,2014,6(14):48-48.XU Zhimin,QI Weilin,SUN Bingheng.The research and optimization of deepening gas injection depth of the oil low pressure wells in Zhalaroer oilfield[J].China Chemical Trade,2014,6(14):48-48.
[12] 徐志敏,王跃文,孙冰恒,等.气举采油技术在让纳若尔油田的应用[J].石油钻采工艺,2014,36(2):75-77.XU Zhimin,WANG Yuewen,SUN Bingheng,et al.Application of gas lifting in Zhalaroer Oilfeld of Kazakhstan[J].Oil Drilling & Production Technology,2014,36(2):75-77.
[13] POHLER S A,HOLMES W D,COX S.Annular velocity enhancement with gas lift as a deliquification method for tight gas wells with long completion intervals[R].SPE130256,2010.