< leases

MASTERSON 48, T.R.B.

Oil · District 7C · Lease #4671

Operator: VENCER ENERGY, LLC

Fields: SPRABERRY (TREND AREA)

Cum Oil

39k BBL

Cum Gas

336k MCF

casinghead

Wells

2

Production

1993-01 — 2025-12

Peak Month

1995-12

Production History

Cum Oil: 39,433 BBL Cum Gas: 335,566 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

441 BBL/mo

Di (annual)

71.1%

b-factor

1.0

EUR

26,775 BBL

R-squared

0.524

type

hyperbolic

Operator History (from monthly production reports)

2024-01 — 2026-07 CIVITAS PERMIAN OPERATING, LLC 31 mo
2021-08 — 2023-12 VENCER ENERGY, LLC 29 mo
2018-08 — 2021-07 HUNT OIL COMPANY 36 mo
2000-09 — 2018-07 ENDEAVOR ENERGY RESOURCES L.P. 215 mo
1993-08 — 2000-08 STEPHENS, AUTRY C. 85 mo
1993-01 — 1993-07 HOUSTON OIL & MINERALS CORP. 7 mo

Wells (2)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
342-383-34421CIVITAS PERMIAN OPERATING LLC18,6001995-07-10
242-383-10498CIVITAS PERMIAN OPERATING LLC------