摘要
通过建立大孔道试井理论解释模型找到了采用典型曲线拟合来判别大孔道存在的简单而廉价的新方法 ,即采用注水井井口压降双对数曲线来诊断大孔道的存在。由于注水井井口压降值可用不稳定试井压降公式进行描述 ,将井口压降绘制成双对数曲线 ,用不同时间段对应的实测点所绘制的曲线同大孔道的试井理论解释模型找到的典型曲线相拟合 ,可判别地层是否存在大孔道。该方法的可行性在L1 3 - 9和L41 - 1 1两个单元的封堵调剖中得到证实 。
By establishing the interpreting model of large pore well testing theory , a new simple and economic method of determining the existence of large pores was found involving the use of typical curve fitting, i.e., the logarithmic curve of injection wellhead pressure drop. The pressure drop at the water injection wellhead can be described using the pressure drop equation of instable well testing, and a logarithmic curve can be drew; by fitting the curve drew with the real measured points vs different time interval and the located curve by the interpreting model, it then can be determined whether or not there are large pores. The feasibility of this method was verified in the plugging and profile control of the two units as L13 9 and L41 11.
出处
《石油钻采工艺》
CAS
CSCD
北大核心
2003年第3期48-50,共3页
Oil Drilling & Production Technology
关键词
大孔道
试井理论
解释模型
井口压降
典型曲线拟合
封堵试验
注水井
water injection well large pore well testing theory interpreting model wellhead pressure drop typical curve fitting plugging test
