682 
MINERALS YEARBOOK, 1967 
 
 According to the Oil and Gas Section, Pennsylvania Bureau of Topographic
and Geologic Survey, 685 wells were drilled, including 274 oil wells, 271
gas wells, 79 dry holes, 57 service wells, three stratigraph tests, and one
miscellaneous test. In addition, 22 wells were deepened, including 21 gas
wells and one dry hole. The total footage of all wells drilled was 1,508,211
of which 1,245,324 was development footage, 164,451 was exploratory footage,
and 98,436 feet were service-well, stratigraphic, and misceilanous drilling.
Of the 624 deep and shallow well completions, 59 wells were exploratory (36
percent successful) and 565 were development (93 percent successful). Total
deep footage drilled at 71 deep wells (Middle Devonian or older) was 350,693.
Of the 71 deep wells, 61 were gas wells and 10 were dry holes. A total of
41.4 billion cubic feet of natural gas was produced from deep reservoirs.
Shallow drilling (Upper Devonian or younger (totaled 614 wells, of which
274 were oil wells, 210 gas wells, 57 service wells, three stratigraphic
tests, and 70 dry holes. Of the 274 oil wells, 65 were drilled in areas being
waterflooded. Total shallow footage amounted to 1,157,518. 
 Warren County continued to be the most active oil area with 163 new wells
drilled, of which 147 were successful oil wells, producing primarily from
the Glade and Clarendon Sandstones and 16 were dry holes. Indiana County
continued to be the most active gas area with 131 wells drilled, of which
43 wells were drilled in the Marchand field, and all but one well was sucèessful.
The Big Run field in Jefferson, Indiana, and Clearfield Counties had 37 new
wells, of which 34 were gas wells and three were dry holes. Seismic crews
logged 17 crew-weeks during the year compared with 68 crew-weeks in 1966.
The steamfiood project which has been active in the Venango "first sand"
in the Franklin-Oak Forest field in Venango County during the last 3 years
has recently been converted to a waterflood. 
 
NONMETALS 
 
 Cement.—Shipments of portland cement were slightly above those of
1966 but the average price per 376-pound barrel decreased $0.01 to $2.85.
Shipments of masonry cement decreased 1 percent from 
those of 1966 while the average price per 280-pound barrel increased $0.05
to $2.71. Portland cement was produced at 22 plants during 1967 which had
a total annual production capacity of 50.9 million barrels, a decrease of
4.9 million barrels from that of 1966. Masonry cement was produced at 21
plants during 1967, five more plants than in 1966. 
 The dividing line between eastern and western Pennsylvania is along the
eastern boundaries of Potter, Clinton, Centre, Huntingdon, and Franklin Counties.
Portland cement shipments of all types from the five plants in western Pennsylvania
totaled 10.6 million barrels at an average price of $3.10 per barrel, of
which 91 percent was ' types I--Il (general use and moderate heat), 3 percent
was. type III (high-early-strength), and 2 percent was portland-pozzolan;
52 percent was shipped to locations in western Pennsylvania, 38 percent to
Ohio, and 6 percent to West Virginia. Of the total shipments from western
Pennsylvania, 9.3 million barrels was shipped by truck in bulk, 743,000 barrels
by truck in containers, 495,000 barrels by railroad in bulk, and 83,000 barrel's
by railroad in containers. 
 Portland cement shipments of all types from 17 plants in eastern Pennsylvania
totaled 29.6 million barrels at an average price of $2.76 per barrel, of
which 90 percent was types I—lI, 6 percent type III, and 3 percent
white cement; 34 percent was shipped to locations in eastern Pennsylvania,
28 percent to New Jersey, 14 percent to New York, 6 percent to Connecticut,
and 6 percent to Maryland. Of the total shipments from eastern Pennsylvania,
15.6 million barrels was by truck in bulk, 9.4 million barrels by railroad
in bulk, 3.4 million barrels by truck ~n containers, and 1.2 million barrels
by railroad in containers. 
 Of the 10.5 million barrels of portland cement produced in western Pennsylvania,
4.9 million barrels was air-entrained; of 
29.0 million barrels produced in eastern Pennsylvania, 5.6 million barrels
was airentrained. Portland cement stocks at yearend totaled 1.7 million barrels
in western Pennsylvania and 2.9 million barrels in eastern Pennsylvania.

 Ready-mixed concrete companies purchased 16.9 million barrels of portland
cement shipped from eastern Pennsylvania and 6.4 million barrels from western