ROBERTSON, JOHN D. -C-

Oil // district 9 // lease#1972

op: MARATHON OIL COMPANY

cum_oil

67k BBL

cum_gas

0 MCF

wells

11

production

1993-01 — 2018-05

peak_month

1997-10

-- production_history

cum_oil: 66,883 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

1,063 BBL/mo

Di (annual)

79.7%

b-factor

0.9

EUR

52,879 BBL

R-squared

0.811

type

hyperbolic

-- wells (11)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
29COMPASS OPERATING, L.L.C.15,6002006-06-22
17COSTILLA ENERGY, INC.15,0001998-11-23
28MARATHON OIL COMPANY65,5001998-02-25
2MARATHON OIL COMPANY24,9481997-11-04
27MARATHON OIL COMPANY29,1001994-09-22
24MARATHON OIL COMPANY35,0051994-06-27
25MARATHON OIL COMPANY15,1001983-09-22
1042-451-00857--------
1342-451-00860--------
1542-451-00862--------
1642-451-00863--------
EOF // data source: Texas Railroad Commission // 2026