摘要
本文从孔隙度定义出发，引入孔隙流体压缩性系数，根据地下水渗流场连续性原理，推导了应用水文测井参数：视电阻率、自然电位、自然伽玛计算含水层给水度和单井涌水量的数学模型。探讨了影响模型计算参数的主要因素，即可动水系数随深度变化的指数规律、有效孔隙度、岩性及测井判定岩性的方法与经验公式、井径、水位降深等。并以足够多的实际资料采用最小二乘法原理确定了模型系数值，编辑了模型计算的综合性程序，实现了通过水文测井系统，定量和微机化计算水文地质参数的有效途径，预测模型扩大了水文测井的应用范围。令人满意的实际使用效果肯定了模型与方法的正确性和较强的实用价值。
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Starting from the definition of porosity and introducing coefficient of
pore fluid compressibility, this paper, based on the principle of continuity of
groundwater vadose field, has derived parameters for hydrologic logging, i. e.
apparent resistivity, selfpotential and gamma-ray, and with these parameters
formulated a mathematic model for calculating water supply of aquifer and
water-yield per well. The major factors affecting calculation lparameters of
the model include eaponeatial law reflecting variation in movable water system
with depth, effective porosity, lithologic characters and method as well as
empirical formula for judging lithologic characters by logging, diameter of
well and fall of water level. With sufficient practical data and using method
of the least square, we have determined the coefficient of the model and
designed an integrated program for model calculation, thus opening up an
effective way for quantitative and microcomputerized calculation of hydrogeo-
logic parameters through hydrologic logging system. The prognostic model
will extend the application of hydrologic logging. The satisfactory results
obtained demonstrate the correctness of the model and its great practical
value.
出处
《物探与化探》
CAS
CSCD
1991年第2期106-115,共10页
Geophysical and Geochemical Exploration
