摘要
主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。
The high pressure well is easily blocked by hydrate and bring major potential safety hazard. Aiming at this productive problem, downhole choke engineering research was developed. According to the downhole choke mechanism and based on the gas flow rule in well bore and strata radial heat transission, the well bore pressure and yield temperature forecast mathematical model was built, and solved it by LongGekuta method. Adopted compositional model and constant entropy enthalpy change to forecast choke heat drop. According to the rates, hydrate spanning condition, tub pressure and temperature distribution, and processing parameters were ascertained. Used the downhole choke design model to design the processing parameter and do field test in Chuanxiao 452 well, and got good effect.
出处
《海洋石油》
CAS
2007年第2期74-78,共5页
Offshore Oil
基金
中国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(SC2005-6)
关键词
井下节流
水合物
节流温降
工艺设计
downhole choke hydrate
choke heat drop
technological design