气井真实产能方程及无阻流量确定方法探讨  

True Deliverability Equation to Determine Openflow Potential of Gas Well

作　　者：李乐忠 李相方[2] 王钒潦[2] 

机构地区：[1]中海石油气电集团技术研发中心,北京100007 [2]石油工程教育部重点实验室.中国石油大学,北京102249

出　　处：《天然气技术与经济》2014年第2期27-29,78,共3页Natural Gas Technology and Economy

摘　　要：针对目前存在的气井产能方程及无阻流量公式在特定的完井方式与工艺水平情况下易受表皮系数影响导致计算结果不准确的问题,在提出了气井真实产能方程及无阻流量概念的基础上,利用常规产能试井法及不稳定试井法计算出表皮影响系数,将现有的产能方程系数中的表皮影响剔除,得到不受表皮因素影响能够真实反映气藏产能属性的气井产能方程,进而计算出气井的真实无阻流量。以苏里格气田某井为例进行真实产能的敏感性因素分析,结果表明表皮系数对气井产能的影响较大,要准确客观地评价产能及无阻流量须建立无表皮系数影响的真实产能方程。Both deliverability equation and openflow potential formula are easily affected by skin factor under special completion modes, which may result in inaccurate calculations. So, a process based on true deliverability and openflow potential is presented, i. e.,(1) to obtain the skin factor by adopting conventional deliverability well test and transient well test,(2) to gain the deliverability equation after eliminating skin effect, which is not affected by skin factor and can represent true deliverability attribute; and(3) to get true openflow potential. This paper takes one well in Sulige gasfield as an example and analyzes some sensitivity factors to deliverability. Results show that the effect of skin factor on deliverability is a little big, and to accurately and objectively evaluate deliverability and openflow potential should establish a true deliverability equation which can not be affected by skin factor.

关 键 词：机械表皮系数 气井产能方程 无阻流量 不稳定试井 

分 类 号：TE328[石油与天然气工程—油气田开发工程]