UNIVERSITY "13"

Oil // district 9 // lease#9876

op: VISTA RESOURCES, INC. (A)

cum_oil

272k BBL

cum_gas

0 MCF

wells

8

production

1993-01 — 2026-03

peak_month

2008-08

-- production_history

cum_oil: 271,987 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

1,377 BBL/mo

Di (annual)

9.4%

b-factor

0.0

EUR

175,054 BBL

R-squared

0.506

type

exponential

-- wells (8)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
11PIONEER NATURAL RES. USA, INC.110,0002010-02-17
10PIONEER NATURAL RES. USA, INC.110,0002007-12-15
6VISTA RESOURCES, INC. (A)211,5001999-01-13
5MIRESCO, INC.17,8001991-06-03
1SAXON OIL COMPANY17,9001982-10-18
2SAXON OIL COMPANY17,9001982-10-18
3SAXON OIL COMPANY17,9001982-10-18
4SAXON OIL COMPANY17,9001982-10-14
EOF // data source: Texas Railroad Commission // 2026