SHIRK, MARY K.

Oil · District 7C · Lease #4326

Operator: SOUTHWEST ROYALTIES, INC.

Cum Oil

46k BBL

Cum Gas

252k MCF

casinghead

Wells

3

Production

1993-01 — 2026-04

Peak Month

2012-04

Production History

Cum Oil: 45,595 BBL Cum Gas: 252,269 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

270 BBL/mo

Di (annual)

32.0%

b-factor

0.6

EUR

20,025 BBL

R-squared

0.500

type

hyperbolic

Operator History (from monthly production reports)

1993-01 — 2026-07 SOUTHWEST ROYALTIES, INC. 403 mo

Wells (3)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
2SOUTHWEST ROYALTIES, INC.110,1001979-08-02
1SOUTHWEST ROYALTIES, INC.110,1001979-04-17
442-461-10294SOUTHWEST ROYALTIES, INC.------