INDEX. 
A. Page. 
Absorptive capacity of various rocks. 13 
Acids, petroleum, nature and occurrence of. 106-109 
petroleum, test for. 109 
Acknowledgments for aid. 6-7 
Alkalies, distribution and significance of.41-42 
Alkaline earths, distribution and significance 
of..42-43 
Alkalinity, primary and secondary, use of the 
terms. 38 
Alteration of hydrocarbons by water.102-105 
Alteration of waters by hydrocarbons. 50-52, 
93-102 
Altered waters, analyses of. 67-77, S5 
limits of. 52 
position of. 52 
use of term. 51 
Aluminum, distribution and significance of.. 46 
Aluminum and iron, method of determining.. 32 
Ambrose, W. A., acknowledgment to. 7 
Analyses of waters, alphabetical list of, by 
fields.115-110 
need for.'.. 7-8 
sources of.. 40 
value of, to the oil operator.109-113 
Analysis, constituents to be determined by... 31-32 
statement of..32-35 
B. 
Bacteria, decomposition of sulphate by.94-96 
Barium, occurrence of. 94 
Bicarbonate, reported as carbonate. 47 
See also Carbonate. 
Boron, occurrence of. 47 
“Bottom water,” use of term. 17 
Brine, analyses of.71-74,85 
effect of adding primary alkaline water to. 90 
Brines, average concentration of. 90 
Bromine, occurrence of.47,94 
Brown, W. E., acknowledgment to. 7 
Buena Vista Hills, ground water in.28-29 
Bush, R. D., acknowledgment to. 7 
C. 
Calcium, ratio of, to magnesium in different 
types of water.43,92 
See also Alkaline earths. 
Calcium carbonate, action of carbon dioxide 
and sodium sulphate on. 99 
Calcium sulphate, reduction of. 96 
Carbon dioxide, formation of.101,114 
Carbonate, distribution and significance of... 6, 
44-45,114 
formation of.98-99 
source of.. H 
substitution of, for sulphate.88-89 
Page. 
Carbonate-sulphate ratio, use of..48-49 
Chloride, distribution and significance of.... 44,114 
variation in.86-87 
Circulation, conditions governing. 14 
Classification of waters. 41-52 
Coalinga oil field, ground waters in.26-27 
location and importance of. 8 
Colloids, presence of.31-32 
Comparison of waters, criteria for.4S-49 
Concentration of waters, variation in. 40 
Conclusions.5-6,113-115 
Connate water, characteristics of.. 50 
mixing of meteoric waters with. 86 
predominance of alkalies in. 42 
probable migration of. 61 
Cretaceous rocks, oil in. 10 
Crumpton, T. J., acknowledgment to. 7 
D. 
Dearin, J. H., acknowledgment to. 7 
Depth of water-bearing rocks.. 16 
Dinsmore, S. C., acknowledgment to. 7 
Dole, R. B., acknowledgment to. 7 
Drainage of San Joaquin Valley. 9 
E. 
Eastside Coalinga field, ground waters in.... 27 
position of. 26 
“ Edge water, ” use of term. 17 
Elliot, J. E., acknowledgment to. 7 
Equivalents for analytical units. 33 
F. 
Faulkner, E. O., acknowledgment to. 7 
Fellows, Midway field, partial analyses of oil- 
well waters from. 87 
Flow of water, change in character of. Ill 
G. 
Gas pressure, nature of.18-19 
Gases, production of.100-102 
Gaylord, E. G., acknowledgment to. 7 
Geography of San Joaquin Valley. 9 
Geology of San Joaquin Valley. 9-11 
Gravity of oil, variation of, with depth-104-105 
Greer, W. A., acknowledgment to. 7 
Ground water, altered, analyses of. 67-77,85 
depth to. 16 
lower limit of. 16 
mineral matter dissolved in. 20 
modified, analyses of. 64-66,81 
normal, analyses of. 58,59-63 
reversed type of, analyses of. 67-70,85 
salt, origin of.20-23 
time when entrapped.24-25 
117 
