井下节流技术在低温分离工艺中的应用  

APPLICATION OF DOWNHOLE CHOKING TECHNOLOGY IN LOW-TEMPERATURE SEPARATION PROCESS

作　　者：朱浩平[1] 郭自新[1] 苟宏刚[1] 张建华[1] 许俊奇 

机构地区：[1]中国石油长庆油田公司

出　　处：《天然气工业》2007年第6期97-100,共4页Natural Gas Industry

摘　　要：在简要介绍井下节流技术在国内外应用现状的基础上,针对长庆气田采用高压集气集中注醇工艺流程、部分气井及集气管线在生产运行过程中暴露出堵塞严重等问题,通过大量室内性能试验研究,对卡瓦式井下节流器及配套工具进行了改进完善,研发了预置工作筒式井下节流器,开展了室内试验研究和6口井的现场试验。通过井下节流技术在榆林气田的应用,实现了“单井不注醇或少注醇、集气站不加热节流降压、低温分离”工艺,降低了加热炉负荷,减少了燃气和甲醇消耗量,提高了经济效益。通过研究及试验,初步形成了适合低温分离工艺的井下节流配套技术,具有明显的技术经济和社会效益,为高效开发长庆气田上古生界气藏提供了一种有效的技术途径。In addition to a brief introduction on current worldwide applications of downhole choker, the alcohol injection process by high-pressure gas collection in Changqing Gasfield and the serious plugging phenomena in some gas wells and gas collecting pipelines were analyzed in this paper. Great amount of laboratory performance tests have been done to modify the slip-type downhole choker and its supplementary parts. Downhole choker of preset working-barrel type was developed and tested both in laboratory and field tests at six wells. The application of downhole choking technology realizes the process of omitting or reducing alcohol injection, no-heating choking and depressurizing at the gas collection station, and low-temperature separation; mitigates the burden of the heater; reduces consumption of fuel gas and methanol; and improves economic benefit. Through studies and tests, supplementary downhole choking technologies applicable for low-temperature separation was preliminarily developed, providing an effective way to exploit Neopaleozoic gas reservoirs of Changqing Gasfield.

关 键 词：长庆气田 气井 井下节流 低温分离 水合物 

分 类 号：TE866[石油与天然气工程—油气储运工程]