高压气井井下节流工艺设计方法研究  

RESEARCH ON DOWNHOLE THROTTLING TECHNOLOGY IN HIGH PRESSURE GAS WELL

作　　者：周兴付 杨功田 李春 刘杰[2] 

机构地区：[1]中石化西南分公司川西采输处 [2]西南石油大学"油气藏地质及开发工程"国家重点实验室

出　　处：《钻采工艺》2007年第1期57-59,62,共4页Drilling & Production Technology

基　　金：中石化西南分公司开发生产项目"川西气田井下节流先导性试验研究"部分研究成果;项目编号:sc2005-3。

摘　　要：针对高压气井冬季易堵、存在较大安全隐患的生产难题,开展井下节流工艺技术研究。根据井下节流机理,基于天然气在井筒流动规律和地层径向传热,建立了井筒压力和流动温度预测数学模型,并采用精度较高的龙格库塔方法进行数值求解,采用组分模型和等熵焓变预测节流温降。根据气井产量、水合物生成条件、井筒压力、温度分布预测确定节流工艺参数,根据所建立的井下节流设计模型,对川孝452井进行工艺参数设计和现场试验,取得了良好效果。Based on the production features of high pressure gas well and existent problems, downhole throttling technology was researched. Based on the downhole throttling mechanism, the gas flow rule in wellbore and strata radial heat transmission, the forecast mathematical mode of wellbore pressure and flow temperature was established. The model can carry out numerical value solution by LongGekuta method, and predict temperature drop by adopting compositional model and constant entropy enthalpy change. The throttling process parameter was determined based on the well production rate, hydrate spanning condition, wellbore pressure and temperature distribution. Through field test and the design of process parameter in well Chuanxiao 452, good effects were obtained.

关 键 词：井下节流 水合物 节流温降 工艺设计 

分 类 号：TE377[石油与天然气工程—油气田开发工程]