THE SPHINX

Oil · District 08 · Lease #49497

Operator: U.S. ENERGY DEVELOPMENT CORP

Cum Oil

3.4M BBL

Cum Gas

14.0M MCF

casinghead

Wells

8

Production

2017-11 — 2026-04

Peak Month

2017-12

Production History

Cum Oil: 3,410,275 BBL Cum Gas: 13,992,151 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

63,206 BBL/mo

Di (annual)

27.2%

b-factor

0.0

EUR

2,791,179 BBL

R-squared

0.668

type

exponential

Operator History (from monthly production reports)

2025-04 — 2026-07 U.S. ENERGY DEVELOPMENT CORP 16 mo
2017-11 — 2025-03 COG OPERATING LLC 89 mo

Wells (8)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
753HU.S. ENERGY DEVELOPMENT CORP210,7002018-05-29
770HU.S. ENERGY DEVELOPMENT CORP111,4002018-05-29
772HU.S. ENERGY DEVELOPMENT CORP111,4002018-05-29
702HU.S. ENERGY DEVELOPMENT CORP111,0002017-10-17
751HU.S. ENERGY DEVELOPMENT CORP110,7002017-10-17
752HU.S. ENERGY DEVELOPMENT CORP210,7002017-10-17
703HU.S. ENERGY DEVELOPMENT CORP111,0002017-04-17
701HU.S. ENERGY DEVELOPMENT CORP111,0002017-01-25