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<br />, <br /> <br />Salinity Increases in the Navajo Aquifer in Southeastern Utah <br /> <br /> <br /> -40 , -40 <br />, N A. /; l/ B. !. /7 <br /> 1\.) <br /> 0 cl~ o.;t' <br /> 0 -60 ,,~g, I- -60 lii"{' g,'- ISMAYBIUNE <br /> ..l li<'" " " ~' SAMPLE <br /> '2 . <br /> .... $-~ ,/. ~/' <br /> ~ "''/; IX . -80 .,,'. \ <br /> ~ -80 ~ ' <br /> rol 4' " <br /> , ! ^_AA~~ <br /> ~ ~ <br /> Z .. WHITE MESA ONIT, AND <br /> .... -100 -100 MCELMO CREEK <br /> BRINE SAMPLES <br /> (:l <br /> 00 <br /> -120 -120 PROPOSED COMPOSITION' <br /> OF INJECTION WATER <br /> <br />-140 <br />-18 -16 -14, -12 -10 -8 -6 -4 -2 D 2 4 <br /> <br />alSo, IN PERMIL <br /> <br />-40 <br /> <br />--60 <br /> <br />..l <br />.... <br />~ <br />~ . -80 <br />rol <br />~ <br />Z <br />.... <br /> <br />. -100 <br />~ <br /> <br />-120 <br /> <br /> <br />c. <br /> <br />-140 <br />-18 -16 -14 '12 -10 -8 -6 -4 -2 0 2 4 <br /> <br />alSo, IN PERMIL <br /> <br /> <br />., <br />:1 <br /> <br />-140 <br />~ ~ ~ ~ ~ ~ -6 -4 q 0 2 4 <br /> <br />alSo, IN PERMIL <br /> <br />". <br />'~~ <br /><i <br />, <br />I <br />j <br />;~ <br />. ;{ <br />l <br />J <br />-,~ <br />1 <br />:11 <br />'. J <br />-',~ <br />;l; <br />! <br />,~ <br />k <br />.~ <br />.-~ <br />ii <br />f <br />il <br />i} <br />''1 <br />\: <br />i <br /><I <br />.~ <br /> <br /> <br />EXPLANA TION <br /> <br /><> ALLUVIAL AQUIFER <br />'V SAN JUAN RIVER <br />. OIL-FIELD BRINE <br />. INJECTION WATER <br />A NAVAJO AQUIFER <br /> <br />Figure 9. The 6I~O and 6D Values of Ground- and Surface-Water Samples Collected in and Acljacent to the Study Are.: <br />(8) Best-Fit Mj~ing Line Through Isotopically Enriched Sample Values from the Navajo Aquifer; (b) Best-Fit Mixing <br />Line Between Isotopic Values in Oil-Field Brines and Make-Up Water from the Alluvial Aquifer; and (c)" Beat_-Fit mixillg <br />Line Between Pro~sed Isotopic Value of Injection Water and Freshwater from the Navajo Aquifer Represented by Well N12. <br /> <br />evaporated end-memb~r water. The constructed. mix- <br />ing line does not indIcate mixing with most of the <br />OFB samples. . <br />The mixing line coqstructed in graph A (Figure 9) <br />does not account for tile shift in the isotopic composi- <br />tion of potential end-member injection water used for <br />secondary recovery op,rations in the Aneth Oil Field. <br /> <br />i~ _J <br /> <br />A mixing line constructed between the isotQlJic compo- <br />sition of the Ismay OFB and water from the' San Juan <br />River alluvium explains the shift from enriched iso- <br />topic values in OFB from the Ismay injection facility <br />to lighter isotopic values at the Aneth, Riltherford, <br />White Mesa Unit, and McElmo Creek injectIonfacili- <br />ties. Recovered brine volumes at.the Ismay injection <br /> <br />~ <br />...~ <br />lij <br />'" <br />'TJI <br />:a <br />, ~ <br /> <br /> <br />',< ;~ <br /> <br />1131 <br /> <br /> <br />WATER RESOURCES BULLETIN <br /> <br />,l, ....". _9,_'"", ~~..~ _ "-<':.' "ak., ",--.,.~ti.'A'~Hk..,:' <br />