74 OIL-FIELD WATERS IN SAN JOAQUIN VALLEY, CAL. 
Table 9 . —Analyses of brine or connate water altered by the action of the oil, from oil wells 
in the Midway and Sunset oil fields, Cal. 
53 
54 
55 
56 
57 
58 
59 
PROPERTIES OF REACTION IN 
PER CENT. 
Primary salinity... 
84.2 
48.6 
84.0 
84.6 
83.4 
83.6 
85.0 
Secondary salinity. 
14.6 
5.0 
11.4 
13.8 
16.2 
16.0 
12.6 
Primary alkalinity. 
0 
0 
0 
0 
0 
0 
0 
Secondary alkalinity. 
1.2 
46.4 
4.6 
1.6 
.4 
.4 
2.4 
Per cent ofrSCMn rS 04 +rCl... 
.01 
Trace. 
0 
.20 
Trace. 
.0 
.48 
CONSTITUENTS IN PARTS PER 
MILLION. 
Sodium (Na). 
al5,015 
®1,323 
o9,855 
10,548 
ail,656 
11,176 
l A71 
Potassium (K). 
72 
86 
> 0/1 
Calcium (Ca).. 
1,895 
1,223 
1,064 
772 
1,281 
1,100 
69 
Magnesium (Mg). 
342 
345 
570 
443 
503 
21 
Iron (Fe). 
} 611 
6 1.7 . 
65 
f . 1 
Aluminum (Al). 
{ 8 .4 
Sulphate (SO 4 ).. 
32 
3.6 
0 
34 
4.3 
0 
7.8 
Nitrate (NO 3 ). 
0 
45 
0 
Chloride (Cl).. 
27,102 
2,254 
17,231 
19,624 
21,415 
20,421 
1,170 
Iodide (I). 
29 
Carbonate (CO 3 ). 
c 275 
cl, 645 
c692 
0 
c 90 
0 
0 
Bicarbonate (HCO 3 ). 
573 
162 
48 
Silica (SiC> 2 ). 
60 
4.1 
10 
43 
39 
5 
44,732 
6,454. 4 
29,202 
31,953.5 
34,928.3 
33,440 
1,967.8 
Carbon dioxide (CO 2 ). 
Presen t 
Present. 
Present. 
REACTING VALUES IN PER CENT. 
Alkalies: 
Sodium (rNa). 
a 42.1 
a 24.3 
a 42.0 
42.1 
041.7 
41.6 
Potassium (rk). 
.2 
.2 
> 42.5 
Alkaline earths: 
Calcium (rCa). 
6.1 
25.7 
5.2 
3.5 
5.3 
4.7 
5.0 
Magnesium (rMg). 
1.8 
2.8 
4.2 
3.0 
3.5 
2.5 
Strong acids: 
Sulphate (rSO<). 
. 1 
.2 
Nitrate (rN 03 >. 
. 1 
Chloride (rCl). 
49.4 
26.8 
47.7 
49.1 
49.8 
49.7 
48.6 
Weak acids: 
Carbonate (rCOs). 
c.6 
c23.2 
c2.3 
.0 
c.2 
.0 
.0 
Bicarbonate (rHCOs). 
.8 
.2 
1.2 
ANALYSIS AS REPORTED .d 
Sodium chloride. 
2,226. 21 
196.25 
1,461.20 
Calcium sulphate. 
2.64 
.30 
Calcium chloride. 
274. 80 
19.92 
97.36 
Calcium carbonate. 
26.78 
160. 25 
67.39 
Magnesium chlorid e. 
78. 40 
78.93 
Iron oxide and alumina. 
.64 
.10 
.29 
Silica. 
3.50 
.24 
.62 
2,612.97 
377.06 
1,705. 79 
a Reported and calculated as sodium but includes potassium. 
6 F62O3+AI2O3. 
c Reported and calculated as carbonate but probably in part bicarbonate. 
d In hypothetic combinations, in grains per U. S. gallon. 
Midway field: 
53. Standard Oil Co. well 7, sec. 12, T. 32 S., R. 23 E. Water from 2,600 feet, or 400 feet below a gas 
sand and about 100 feet above the oil. Analyst, Standard Oil Co., June, 1913. 
54. Standard Oil Co. well3, sec. 20, T. 32 S., R. 24 E. Water from 3,250 feet, or about 200 feet below 
the oil. Analyst, Standard Oil Co., February, 1911. 
55. Standard Oil Co. well 1, sec. 28, T. 32 S., R. 24 E. Waterfrom 2,390feet, or about 400feet above 
the oil. Analyst, Standard Oil Co., August, 1909. 
Sunset field: 
56. M. J. & M. M. Oil Co. well M. J. 6, sec. 36, T. 12 N., R. 24 W. 
about 200 feet below top oil sand and above lower oil sand. 
1914. Analyst, S. C. Dinsmore. 
K ^ P Tl i a u i ? g < *L 0i - 1 Co - T? 11 ’ in , NE -1 sec - 31 ; T -12N., R. 23 W. Waterfrom 2,924 feet, or about 
200 feet below horizon of top oil sand. Analyst, Kern Trading & Oil Co., January, 1915. 
Midway Northern Oil Co. well 5, sec. 32, T. 12 N., R. 23 W. Flowing water from 2,505 feet, or 
below top oil sand and about 100 feet above second oil sand. Temperature, 115° F. Sampled 
by G. S. Rogers, August, 1914. Analyst, Chase Palmer. 
Sunset Security Oil Co. well 1, sec. 29, T. 11 N., R. 23 W. Flowing water, probably from sands 
between 2,992 and 3,997 feet, or below several shows of oil. Sampled by G. S. Rogers, September, 
1915. Analyst, S. C. Dinsmore. * 
Flowing water from 2,270 feet, or 
Sampled by G. S. Rogers, July, 
57. 
58. 
59 . 
