STALEY-MANGOLD UNIT

Oil // district 13 // lease#12565

op: STEPHENS & JOHNSON OPERATING CO.

fields: K-M-A

cum_oil

2.0M BBL

cum_gas

0 MCF

wells

91

production

1993-01 — 2026-03

peak_month

1994-01

-- production_history

cum_oil: 1,976,643 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

10,582 BBL/mo

Di (annual)

7.9%

b-factor

0.6

EUR

2,234,323 BBL

R-squared

0.973

type

hyperbolic

-- wells (91)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
126STEPHENS & JOHNSON OPERATING CO.24,1002024-07-11
127S & J OPERATING CO.14,0001993-07-19
124S & J OPERATING CO.14,0001992-05-21
121AMERICAN PETROFINA CO. OF TEX.13,9501984-09-14
122AMERICAN PETROFINA CO. OF TEX.13,9501984-04-30
120AMERICAN PETROFINA CO. OF TEX.14,0001983-09-26
119AMERICAN PETROFINA CO. OF TEX.13,9751983-08-25
118AMERICAN PETROFINA CO. OF TEX.13,9501981-11-05
1042-009-85389--------
10042-485-14664--------
10142-485-89275--------
10242-485-15873--------
10342-485-89277--------
10642-485-05349--------
10742-485-89280--------
10842-485-89281--------
1142-009-85390--------
11042-485-89283--------
11142-485-21305--------
11242-485-21304--------
11342-485-30368--------
11442-485-30377--------
11542-485-31018--------
11642-009-30901--------
11742-009-31972--------
1242-009-85391--------
1342-485-89231--------
1642-009-10541--------
242-009-85382--------
2342-009-85393--------
2442-009-85394--------
2542-485-89233--------
2642-009-85395--------
2742-009-10528--------
2842-485-89234--------
342-009-85383--------
3042-485-89235--------
3142-009-03215--------
3242-009-85398--------
3342-009-85399--------
3642-009-03219--------
3742-009-03218--------
3842-009-85402--------
3942-485-13809--------
442-009-85384--------
4042-485-89236--------
4242-485-89238--------
4342-485-89239--------
4442-485-89240--------
4542-485-89241--------
4642-485-89242--------
4742-485-89243--------
4942-009-85404--------
542-009-85385--------
5042-009-10222--------
5242-485-15859--------
5442-485-89246--------
5542-485-89247--------
5642-485-89248--------
5842-485-89250--------
5942-009-03216--------
642-009-85386--------
6042-009-85407--------
6142-009-09423--------
6542-485-89252--------
6642-485-15747--------
6742-485-89254--------
6842-485-89255--------
6942-485-89256--------
7342-009-85409--------
7442-485-89257--------
7542-485-15867--------
7642-485-15866--------
7842-485-89261--------
7942-485-89262--------
842-009-85387--------
8142-485-89264--------
8242-485-89265--------
8342-485-89266--------
8442-009-85410--------
8542-009-85411--------
8642-485-14661--------
8742-009-85412--------
942-009-85388--------
9142-485-89270--------
9242-485-89271--------
9342-485-89272--------
9542-009-85413--------
9642-009-85414--------
9742-009-85415--------
9942-485-89273--------
EOF // data source: Texas Railroad Commission // 2026