摘要
为有效抑制天然气管道中水合物的形成,根据流体在多层圆筒壁圆管中流动的传热学理论,综合考虑大地温度变化、天然气物性参数等多方面因素的影响,给出电伴热埋地天然气管道热力计算的数值方法与计算公式,并应用于现场计算。在气井的井口温度一定的条件下,管道缠有电伴热带的出口温度明显升高,且温度升高的最小值为3.8℃,最大值达19.8℃,计算结果与现场实测结果的相对误差小于5%,表明所推导的温降计算公式和编制的计算软件完全能够满足油田生产的要求。
In order to effectively inhibit hydrate formation in the gas pipeline, the numerical method and calculation formula for the electric tracing buried gas pipeline are proposed through comprehensively considering factors in many aspects, such as soil temperature＇s change, natural gas physical parameters according to heat transfer theory of fluid flowing in the circular tube with multilayer cylindrical walls. The numerical method and calculation formula have been adopted in the site calculation. Under the conditions of constant temperature at the wellhead of gas well, the outlet temperature of pipeline wrapped with electrical tracing strip is increased by 3.8 ~C to 19.8 ~C, the relative error between calculated results and field measured results is less than 5%, which indicates that the derived calculation formula and prepared calculation software can fully meet the requirements ofoil field production.
出处
《油气储运》
CAS
2013年第5期496-498,共3页
Oil & Gas Storage and Transportation
关键词
天然气管道
电伴热
热力计算
gas pipeline, electrical heat tracing, thermal calculation
