CHALK -A-

Oil // district 10 // lease#2749

op: WOOD, MCSHANE & THAMS

cum_oil

267k BBL

cum_gas

0 MCF

wells

16

production

1993-01 — 2013-03

peak_month

2001-05

-- production_history

cum_oil: 266,974 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

4,482 BBL/mo

Di (annual)

130.1%

b-factor

1.6

EUR

325,911 BBL

R-squared

0.923

type

hyperbolic

-- wells (16)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
18VISTA RESOURCES, INC. (A)34,0012001-03-20
14VISTA RESOURCES, INC. (A)34,0012001-02-21
4VISTA RESOURCES, INC. (A)34,0012001-02-21
9PRIZE OPERATING COMPANY14,0012001-02-21
59WPRIZE OPERATING COMPANY13,5002001-02-14
8VISTA RESOURCES, INC. (A)13,5001998-12-10
15VISTA RESOURCES, INC. (A)14,0001998-01-16
12VISTA RESOURCES, INC. (A)14,0001998-01-15
10VISTA RESOURCES, INC. (A)14,0001997-11-18
17VISTA RESOURCES, INC. (A)23,8001997-03-10
1142-227-02288--------
242-227-02280--------
5W42-227-02283--------
642-227-02284--------
742-227-02285--------
7W42-227-30204--------
EOF // data source: Texas Railroad Commission // 2026