一种试井模拟技术在南海高温高压气藏X1井产能评价中的应用
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摘要
南海高温高压气井产能测试分析存在机械变表皮无法计算导致产能方程负异常的问题,导致无法有效评价高温高压气井无阻流量。提出以高温高压气井变表皮分析技术和试井模拟产能评价技术为主的高温高压气井试井模拟技术,计算储层真实污染情况,并根据试井模拟产能测试的流压、产量等进行无阻流量计算,消除了高温高压气井产能方程的负异常,进而确定高温高压气井的产能。高温高压气井试井模拟技术成功应用于南海高温高压气藏X1井,有效指导了气田配产。
The following problems stood out in the deliverability tests and analysis of gas wells with high temperature and high pressure(HTHP)in South China Sea.Firstly,it was unable to accurately calculate the variable mechanical skin factors,resulting in the negative slope of deliverability equation,bringing about inaccurate calculation of the absolute open flow of HTHP gas wells.One new simulation technique,mainly consisting of variable skin analysis and productivity numerical simulation,for HTHP gas wells was proposed,and then the real damage could be evaluated accurately.In addition,the absolute open flow of HTHP gas wells was calculated based on flowing pressure and rates data in deliverability test simulation,eliminating the negative slope of deliverability equation.This simulation technique had been applied successfully well-X1 of HTHP gas reservoir in South China Sea,providing guidance for gas field production.
The following problems stood out in the deliverability tests and analysis of gas wells with high temperature and high pressure(HTHP)in South China Sea.Firstly,it was unable to accurately calculate the variable mechanical skin factors,resulting in the negative slope of deliverability equation,bringing about inaccurate calculation of the absolute open flow of HTHP gas wells.One new simulation technique,mainly consisting of variable skin analysis and productivity numerical simulation,for HTHP gas wells was proposed,and then the real damage could be evaluated accurately.In addition,the absolute open flow of HTHP gas wells was calculated based on flowing pressure and rates data in deliverability test simulation,eliminating the negative slope of deliverability equation.This simulation technique had been applied successfully well-X1 of HTHP gas reservoir in South China Sea,providing guidance for gas field production.
引文
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[8]于日全,马华丽,刘平,等.浅层气井产能资料异常原因分析及修正方法[J].油气井测试,2010,19(3):28-30.
[9]姜梅枝.气井二项式产能方程曲线斜率为负值原因分析及方程修正[J].油气井测试,2013,22(4):26-28.
[10]汪新光,彭小东,李浩,等.海上高温超压气藏产能评价异常处理[J].科学技术与工程,2014,14(13):39-44.
[11]王坤,陈明强,曹宝格,等.气井系统试井异常资料分析及处理方法[J].油气井测试,2008,17(4):29-31.
[12]余元洲,张彩,杨丽容,等.不同压力下确定凝析气井二项式产能方程的一种新方法[J].天然气工业,2006,26(3):84-86.
[13]郝斐,张公社,程林松,等.携液气井产能方程研究[J].天然气工业,2006,26(6):92-93.
[14]熊钰,孙安培,张雅玲,等.凝析气井产能试井解释中的阻塞表皮系数校正法研究[J].特种油气藏,2012,19(4):81-83.
[15]陈健,黄炳光,王怒涛,等.变表皮系数在凝析气井产能试井中的应用[J].重庆科技学院学报,2010,12(3):39-41.
[16]李小平,李允.气井产能分析新方法[J].天然气工业,2004,24(2):76-78.