752 MINERALS YEARBOOK, 1967 
Table 11.—Estimated proved recoverable reserves of natural gas liquids
in 1967 by railroad 
districts 1 
(Thousand barrels) 
Railroad district 
Proved 
reserves, 
Dec. 31, 1966 
Extensions 
and 
revisions 
New 
fields and 
new pools 
Production 
Proved 
reserves, 
Dec. 31, 1967 
Change 
from 
Dec. 31, 1966 
1                
2                
3                
4                
5                
6                
7B               
7C               
40,983 
194,091 
824,299 
769,953 
84,330 
510,215 
45,278 
151,951 
+307 
+1,043 
+75,671 
+22,445 
+10,277 
—2,432 
—8,060 +36,686 
66 
1,586 
19,613 
22,223 
4,216 
 406 
 237 
4,337 
3,106 
17,006 
54,976 
53,103 
7,808 
23,862 
5,005 
18,306 
38,250 
179,714 
864,607 
761,518 
91,015 
484,327 
32,450 
174,668 
—2,733 
—14,377 +40,308 
—8,435 +6,685 
—25,888 
—12,828 +22,717 
8                
8A               
9                
10               
 
Total       
519,718 
504,645 
76,195 
379,964 
+183,659 
—106,164 
 —3,714 
±32,524 
1,624 
 49 
 220 
3,301 
59,123 
18,049 
8,443 
29,960 
645,878 
380,481 
64,258 
385,829 
+126,160 
—124,164 
—11,937 +5,865 
 
4,101,622 
+242,242 
57,878 
298,747 
4,102,995 
+1,373 
1 Committe~s on natural gas liquid reserves of American Petroleum Institute
and American Gas Association. 
 
 
 
Table 12.—Estimated proved recoverable reserves of crude oil in 1967
by railroad district 1 
 
 
(Tho 
usand barrels) 
 
 
 
Railroad district 
Proved 
 
 
 
reserves, 
 
 
 
Dec. 31, 1966 
Extensions 
 
 
 
and 
 
 
 
revisions 
New 
 
 
 
fields and 
 
 
 
new pools 
Production 
Proved 
 
 
 
reserves, 
 
 
 
Dec. 31, 1967 
Change 
 
 
 
from 
 
 
 
Dec. 31, 1966 
1              
2              
140,560 
938,151 
36,115 
81,223 
1,253 
3,758 
18,493 
56,713 
159,435 
966419 
+18,875 
+28,268 
3              
4              
5              
6                
7B               
2,100,318 
749,145 
163,508 
2,807,347 
279,792 
74,326 
4,905 
1,262 
55,670 
20,247 
11,116 
24,644 
1,756 
2,633 
2,729 
140,479 
87,116 
11,496 
101,010 
38~884 
2,045,281 
691,578 
155,030 
2,764,640 
 263,884 
—55,037 
—57,567 
—8,478 
—42,707 
—15,908 
7C_              
403,937 
26,078 
5,119 
53,001 
382,133 
—21,804 
8                
8A               
9                
10               
 
Total       
3,059,630 
2,725,041 
418,137 
291,568 
836,157 
166,481 
79,618 
15,825 
10,496 
2,802 
2,233 
1,060 
276,787 
166,195 
67,374 
32,983 
3,629,496 
2,728,129 
 432,614 
 275,470 
+569,866 
 +3,088 
+14,477 
—16,098 
 
14,077,134 
1,397,907 
69,599 
1,050,531 
14,494,109 
+416,975 
1 Committees on crude oil reserves of the American Petroleum Institute and
American Gas Association. 
 
rate of 18 days, or the equivalent of 58 percent of the market-demand factor.
At that time, the larger Texas fields were at flush production according
to Jim C. Langdon, Texas Railroad Commission Chairman, and now many of these
same fields are being waterflooded. Nearly every railroad district showed
some response to the 103,259,933 barrel August production record. The greatest
volume—26,459,1 18 barrels—was recorded in District 8 of West
Texas followed by 17,212,757 barrels from District 8A, with gulf coast District
3 reporting 14,116,285 barrels. The crisis showed 1,473 fields out of a total
8,680 fields with possible surplus capacity at the 54-percent factor. The
Railroad Corn- 
mission study showed 10,880 flowing wells that could produce more and 14,639
pumping wells with surplus capacity. The East Texas field, with more than
17,000 wells, was not included in the Commission's study. 
 The Mideast crisis resulted in two important temporary rulings by the Texas
Railroad Commission. On June 23, 1967, the Commission abandoned its per-well
basis for allowable production, substituting instead a lease allowable. It
also suspended gas-oil ratio tests until December 31. Under the lease allowable,
an operator could produce from any well or group of wells on any given lease.
Thus, operators could use better producing wells to