OIL OF THE SANTA MARIA DISTRICT. 
115 
those found in Bulletins Nos. 31 and 32 of the California State Min¬ 
ing Bureau. The analyses of Santa Maria oil contained in these 
bulletins were made by H. N. Cooper, and, together with those of 
oils from some of the other California districts, are copied in the 
table below. 
The only definite information concerning the ultimate composi¬ 
tion of the oil is contained in a table by P. W. Prutzman a showing 
the incidental constituents of California crude oil. This author 
states that a Santa Maria oil of 17° (probably from the eastern group 
of Western Union wells) contained 0.43 per cent of nitrogen, no sul¬ 
phur, and 8.37 per cent of asphaltene. The freedom of the Santa 
Maria oil from sulphur is one of its chief and valuable characteristics. 
The following table 6 contains analyses of four oils from the Santa 
Maria district, accompanied by analyses of twelve other California 
oils for purposes of comparison. The oil of analysis No. 3 in the 
table is the most characteristic of the average product of the Santa 
Maria field. 
Following the table are distillation tests. 
Chemical analyses of California petroleum. 
[By H. N. Cooper, chemist. Samples collected by Marion Aubury, field assistant.] 
No. of analysis. 
- t - 
Name of company. 
County. 
District. 
Gravity. 
Specific 
gravity 
of crude 
at 15° C. 
(about 
60° F.). 
1 
Western Union Oil Co. 
Santa Barbara ... 
Western Union.. 
° B. 
20 
0.9337 
2 
......do. 
.do. 
Carreaga. 
34.6 
.8508 
3 
Pinal Oil Co. 
.do. 
27.6 
.8882 
4 
Union Oil Co. of California. 
.do. 
Lompoc. 
16.2 
.9574 
5 
Sea Cliff Oil Co. 
.do. 
Summerland. 
14.9 
.9665 
6 
7 
King Refining Co. 
I. W. Shirley. 
Kern. 
Los Angeles. 
Kern River field.. 
Middle field. 
13 
16.5 
.9792 
.9559 
8 
Southern Pacific Oil Co. 
Kern. 
McKittrick... 
18.5 
.9425 
9 
Home Oil Co. 
Los Angeles. 
Whittier. 
20.7 
.9291 
10 
Brea Canyon Oil Co. 
Orange. 
Fullerton. 
23 
.9147 
11 
Los Angeles Pacific Rwy. Co. 
Ventura. 
Santa Paula. 
27.3 
.8900 
12 
Union Oil Co. of California. 
.do. 
Adams Canyon... 
Coalinga. 
.do. 
28.9 
.8814 
13 
14 
California Oilfields (Limited). 
Home Oil Co. 
Fresno. 
.do. 
31.3 
34.1 
.8680 
.8530 
15 
16 
Los Angeles Pacific Rwy. Co. 
Pacific Coast Oil Co. 
Ventura. 
Los Angeles. 
Timber Canyon... 
Tico Canyon. 
35.1 
37.3 
.8481 
.8367 
a Bull. California State Mining Bureau No. 32, 1904, p. 224. 
b For a detailed description of the methods used in obtaining the data recorded in this table the 
reader is referred to Bull. California State Mining Bureau No. 31, p. 1; idem, No. 32, 1904, table opp. 
p. 230; or to Bull. U. S. Geol. Survey No 309, 1907, pp. 20.5-208. 
