COVINGTON, ELLA "B"

Oil · District 8A · Lease #68595

Operator: XTO ENERGY INC.

Cum Oil

507k BBL

Cum Gas

134k MCF

casinghead

Wells

8

Production

2003-07 — 2026-04

Peak Month

2017-12

Production History

Cum Oil: 507,148 BBL Cum Gas: 134,051 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

13,775 BBL/mo

Di (annual)

188.6%

b-factor

1.6

EUR

814,878 BBL

R-squared

0.756

type

hyperbolic

Operator History (from monthly production reports)

2022-01 — 2026-07 HIGHMARK ENERGY OPERATING, LLC 55 mo
2003-07 — 2021-12 XTO ENERGY INC. 222 mo

Wells (8)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
17HIGHMARK ENERGY OPERATING, LLC28,6002019-08-15
22RHIGHMARK ENERGY OPERATING, LLC18,6902018-11-05
29HIGHMARK ENERGY OPERATING, LLC18,6902018-09-04
23HIGHMARK ENERGY OPERATING, LLC18,6902017-08-29
21HIGHMARK ENERGY OPERATING, LLC28,6902017-08-15
20HIGHMARK ENERGY OPERATING, LLC38,7002016-08-22
19HIGHMARK ENERGY OPERATING, LLC18,5502004-03-05
18HIGHMARK ENERGY OPERATING, LLC28,5002002-07-29