马占林,汝新英
MA Zhan-lin1,RU Xin-ying2(1.Southwest Petroleum University

• 1:西南石油大学油气田开发工程
• 2:大庆油田有限责任公司第八采油厂

摘要(Abstract)：

通过对中浅层气田水合物生成机理及产生规律的研究与实验,得出了气井水合物生成的温度、压力界限;利用气井水合物生成规律得出了水合物在井筒中生成的界限。研究设计了井下节流防治气井水合物工艺,并通过井下油嘴节流、降低井筒内天然气压力及破坏水合物的生成条件达到防止水合物生成的目的。在研究过程中,推导出气嘴的最小下入深度、最佳嘴径关系式并用于井下节流工艺参数的计算、优化,现场应用效果较好。
Studies and experiments aiming for the generation mechanism and rules of hydrate in middle and shallow layers of gas wells obtained the temperature and pressure thresholds for gas well hydrate generation.Hydrate generation rules in gas wells have been predicted,through which the limitation of hydrate generation in boreholes could be identified.Downhole choke technique is delicately studied herein this article,through glib choke,degrading the natural gas pressure in boreholes and damaging hydrate generation conditions,the generation of hydrate in gas wells could be effectively inhibited.Associated with the studying process,relational expressions of the minimum setting depth of the glib and the best glib and diameter ratio is derived for downhole choke parameter calculation and optimization.Field application of the technique in 10 wells achieves satisfactory results.

关键词(KeyWords)： 气井;水合物;生成机理;防治技术;井下节流
gas well;hydrate;generation mechanism;prevention technique;downhole choke

Abstract:

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基金项目(Foundation):

作者(Author): 马占林,汝新英
MA Zhan-lin1,RU Xin-ying2(1.Southwest Petroleum University

参考文献(References)：

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