试油测试作业中天然气放喷管线求产极限探讨  

The Maximum Gas Production for the Testing Line during the Surface Well Test

作　　者：刘飞[1,2] 曾小军[2] 潘登[2] 贺秋云[2] 庞东晓[2] 陈小榆[3] 舒梅[2] 

机构地区：[1]成都理工大学能源学院,成都610059 [2]川庆钻探工程有限公司钻采工程技术研究院,广汉618300 [3]西南石油大学石油工程学院,成都610500

出　　处：《科学技术与工程》2013年第26期7788-7792,共5页Science Technology and Engineering

摘　　要：目前试油测试作业过程中,天然气放喷测试管线的尺寸没有统一的标准,不同尺寸和长度天然气放喷管线的求产极限不明确。为确定天然气放喷管线的合理求产极限,在考虑天然气放喷出口呈现的不同流动状态基础上,建立更为合理的天然气放喷管线水力计算方程,求取不同流量大小天然气在不同尺寸和长度放喷管线流动过程中的沿程压力损耗值和局部压力损耗值等参数,进而得到放喷管线起点压力;并与测试分离器最高许可工作压力进行比较,从而确定出不同长度和尺寸天然气放喷管线条件下分离器的最大可测试产量。在此基础上对放喷管线的强度进行校核计算,判断放喷管线的安全状态。现场应用表明,采用推荐方法计算放喷管线起点压力和现场作业实际结果非常稳合,最大误差小于5%,说明在考虑放喷出口流动状态下的放喷管线起点压力计算方法较可靠,可为现场放喷测试管线尺寸选择和最大求产极限提供具体的指导标准。The sizes of the gas testing line has no single standard during the surface well test of today. The maximum production is not clear for the testing line with different sizes and lengths. In order to determinate the rational gas production of testing line, the hydraulic calculation equation is established after analysing the flow state of testing line at the end. The frictional pressure loss values, local pressure loss values and the pressure valves of starting point for the different testing line are calculated under different flow rates. The maximum gas production for the testing line can be confirmed by compared to the allowable pressure the 3-phase separator. The tensile and fatigue strength of the testing line are also checked on flowing. Field applications show that the calculated pressure of the starting point is in close proximity to the actual valve by measurements. The maximum error is lower than 5% between them, which shows the accuracy of this computing method. The result of calculate valves can be used as guidance standards for selecting the sizes of well testing line.

关 键 词：地面测试 放喷测试管线 力学分析 起点压力 终点压力 核算应力 

分 类 号：TE273[石油与天然气工程—油气井工程]