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AmerAt~a. inc MWA-2 DnlGng and Compietwn Report <br />leg (947 to I?00 feet) ranged from 9.7 to 81.8 fUfir, and averaged 23.1 ftJhr. Actual penetration <br />rates 1 not including connection times) ranged from 9.6 to 80 ftfir and averaged 34.4 ftfir for the <br />entire hole (Table 4 and Figure 81. Actual penetration rates during drilling of the 1'_.324-inch- <br />diameter leg (20 to 947 fret) of the hole ranged from 14.0 to 80.0 ftfir, and averaged 50.4 ftfir, <br />whereas actual penevation rates for the 6-inch-diameter leg (947 to 1?00 ft) ranged from 9.6 to <br />•10.0 ft/tu. and avcraged'_4.3 ft/ly. <br />Overall. the collective and actual penetration rates progressively decreased down hole, especially <br />below about 600 feet.:\t this depth there was a significant increase in the amount of <br />groundwater cncoumcred (up to 60 gpm discharge), plus more resistant beds of oil shale were <br />more commonly penevatcd. <br />C:RQI'~DWA'I'ER 111'DROLOCI' <br />On-.Site Obsen•nriuns of Disckargr and Bwic {f'nrer Qualin• <br />\lcasurable Lroun~iwatrr discharge while drilling was first noted by drilling personnel at <br />approstmatcly 270 to 280 feet in the Uinta Formation-Greco River Formation transition ronc <br />~ I able i,1 lhtcc groundwater was encountered. it was periodically s:unpled at 4Q-hwadepth <br />intcnals fix on•site field grochemtcal analysis tdischarge flow rates, total dissolved solids. <br />conductivity, temperature, and pH) until TD was reached. Discharge measurements greater than <br />ahout IO gpm were taken by the drilling personnel (timed volume increase in holding tank <br />attached to the shale shaken, whereas those Icss than 10 gpm were made with a graduated <br />bucket. 4'anauans in these data l'I~able 6) are summarized in Figure 9 and 'iablc '. <br />Table 2. Field Hydrology Summary Statlatical Data <br />Mean Stand. <br />Parameter N Mln. Value Max. Value Value Dev. <br />Discharge (gpm) 26 1 5 t45 51 40 <br />Tolai D~ssoivved Solids (ppm) 25 400 900 568 t28 <br />Conductivity (NSlcm) 25 900 1800 1172 262 <br />Temperature 1°C) 25 9.3 18 7 15.5 1 8 <br />pH 25 8.26 8 95 8 51 0 t8 <br /> <br />