摘要
单位涌水量是评价地层富水性的核心指标之一,常规的钻孔单位涌水量换算未考虑井损的影响。本在对钻孔单位降深涌水量的换算方法进行阐述,在此基础上提出基于井损的单位涌水量换算方法,并进行实例应用分析。结果认为:当抽水量Q或者降深S较大时,井损对钻孔单位涌水量的影响巨大。当Q-S曲线呈现直线或者近似直线时,其井损通常可忽略,可不进行井损换算;Q-S曲线曲度越大,Q-S曲线形变越严重,井损的影响也越大,必须进行基于井损的单位降深涌水量换算,以更加客观、准确地评价地层的富水性。
Unit water influx is one of the core indicators for evaluating the water richness of a formation,and the conventional conversion of unit water influx in boreholes does not take into account the effect of well loss.In this in the borehole unit drop depth of water influx conversion method is described,on this basis,well loss-based unit influx conversion method is proposed,and example applications are analyzed.The results are considered:When the pumping volume Q or the drop depth S is large,the effect of well loss on the unit surge rate of the borehole is huge.When the Q-S curve is straight or nearly straight,the well loss is usually negligible and no well loss conversion can be performed;The greater the curvature of the Q-S curve,the more serious the deformation of the Q-S curve,and the greater the influence of well loss,it is necessary to carry out the well loss based on the well loss of the unit depth of water influx conversion,in order to more objectively and accurately evaluate the water richness of the formation.
作者
陈新攀
CHEN Xin-pan(Zijin Mining Group Company Limited,Xiamen,Fujian 361006,China)
出处
《地下水》
2024年第3期34-36,共3页
Ground water
关键词
钻孔单位涌水量
井损
Q-S方程
井径换算
borehole unit surge
well damage
Q-S equation
well diameter conversion
