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. ., The hydraulic conductivity of the$oil adiacent to a well screen may be approximated using a <br /> E <br /> modification of s steady state groundwater flow to a well,where <br /> k = rc7. ln_B;Zw 1 In XO (Bouwer and Rice, 1976) <br /> 2L t Yt <br /> E <br /> Where: <br /> Sc hydraulic conductivity of the aquifer (Lrr) <br /> rc inside radius of the castsg, (L) <br /> y • head loss. (L) <br /> y,• initial head loss. (L) <br /> rw r radial distance of borehole. (L) <br /> L o screen length, (L) <br /> D saturated aquifer thickness, (H) assumed to 1.5 times (ft) <br /> H- depth frog static water level to well bottom, (L) <br /> A =dim coefficient <br /> B - dim coefficient <br /> it C• dim coefficient <br /> Ra equivalent radial distance which the head loss is dissipated. (L) <br /> Where: <br /> Re/rw . 1.1 + A .6 $ 1nILD�11 for partially penetrating wells, and <br /> µE (En Hlrw) L/ rw <br /> In for fully penetrmdng welts. <br /> -1 In(H/rw) L/rw <br /> For a given geometry, rw. H.L.and D will yield values for A and B or C, which were <br /> obtained from an analog simulation described by Bouwer and Rica, 1376. <br /> A semilogarithruic plot of the head change versos time was constructed. The terra I/t In yo/Yt <br /> was obtained from the best fitting straight line. <br /> Z. <br /> i <br />