榆林气田井下节流技术研究与应用

Research and application of downhole throttling technology in Yulin gas field

张宗林 郝玉鸿

ZHANG Zonglin HAO Yuhong

西北大学地质系，陕西西安　 710018 长庆油田公司第二采气厂，陕西榆林 　719000

Geology Department of Northwest University, Xi’an 710018, China No.2 Gas Production Plant ofChangqing Oilfield Company, Yulin 719000, China

针对榆林气田高压集气集中注醇工艺中存在的携液能力差、易形成水合物堵塞、管线承压较高等问题，从井下节流工艺入手，研究了节流工艺参数的确定方法，推导出井下节流气嘴直径的经验公式，并对其在榆林气田的应用可行性进行了分析。结果表明，井下节流工艺适用于该气田气井，能够降低井口压力。

The technological process of the high-pressure gas gathering and concentrated alcohol injection is adopted in Yulin gas field, but some problems as bad fluid-carrying capability, hydrate plugging and high bearing pressure of pipeline, have been found in the process of production. So starting from principle of downhole throttling technology, in this paper we study the determination of the process parameters and analyze the application feasibility in Yulin gas field. Results indicate that downhole throttling technology is suitable for this gas field and can decrease the wellhead pressure.