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WATER CHEMISTRY EVALUATION OF THE EXISTING STIG-1 AND PROPOSED LEC-1 INJECTION WELLS <br /> ------------------------------------------- <br /> Initial solution 1. Domengine Formation Water May 1993 <br /> -----------------------------Solution composition------------------------- <br /> Elements Molality Moles <br /> Alkalinity 1.027e-003 1.027e-003 <br /> Ca 1. 920e-002 1. 920e-002 <br /> Cl 1. 997e-001 1. 997e-001 <br /> K 1.190e-003 1.190e-003 <br /> Mg 3.577e-003 3.577e-003 <br /> N(5) 2.283e-004 2.283e-004 <br /> Na 1.408e-001 1.408e-001 <br /> S (6) 8.422e-005 8.422e-005 <br /> Si 2.777e-004 2.777e-004 <br /> ----------------------------Description of solution----------------------- <br /> pH = 7.850 <br /> pe = 10.000 <br /> Activity of water = 0. 994 <br /> Ionic strength = 2.168e-001 <br /> Mass of water (kg) = 1.000e+000 <br /> Total carbon (mol/kg) = 9. 92le-004 <br /> Total CO2 (mol/kg) = 9. 92le-004 <br /> Temperature (deg C) = 32.000 <br /> Electrical balance (eq) = -1.359e-002 <br /> Percent error, 100* (Cat- IAnI ) / (Cat+IAnl ) = -3.50 <br /> Iterations = 6 <br /> Total H = 1.110145e+002 <br /> Total 0 = 5.551131e+001 <br /> ----------------------------Distribution of species----------------------- <br /> Log Log <br /> Log <br /> Species Molality Activity Molality Activity <br /> Gamma <br /> OH- 1. 682e-006 1.174e-006 -5.774 -5. 930 - <br /> 0.156 <br /> H+ 1.782e-008 1.413e-008 -7 .749 -7.850 - <br /> 0.101 <br /> H2O 5.551e+001 9. 938e-001 1.744 -0.003 <br /> 0.000 <br /> C (4) 9. 92le-004 <br /> HCO3- 8.178e-004 6.044e-004 -3.087 -3.219 - <br /> 0.131 <br /> CaHCO3+ 6.785e-005 5.015e-005 -4 .168 -4.300 - <br /> 0.131 <br /> NaHCO3 3.353e-005 3.525e-005 -4 .475 -4.453 <br /> 0.022 <br /> TECHNICAL MEMORANDUM_V3.DOC 21 <br />