CHALK, OTIS /EO/

Oil · District 08 · Lease #42211

Operator: ROVER PETROLEUM OPERATING, LLC

Cum Oil

70k BBL

Cum Gas

23k MCF

casinghead

Wells

7

Production

2011-12 — 2026-04

Peak Month

2011-12

Production History

Cum Oil: 70,265 BBL Cum Gas: 22,673 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

559 BBL/mo

Di (annual)

5.2%

b-factor

0.0

EUR

119,855 BBL

R-squared

0.508

type

exponential

Operator History (from monthly production reports)

2024-01 — 2026-07 GRAYROCK ENERGY II, LLC 31 mo
2017-06 — 2023-12 ROVER PETROLEUM OPERATING, LLC 79 mo
2013-01 — 2017-05 MERIT ENERGY COMPANY 53 mo
2011-12 — 2012-12 CIMAREX ENERGY CO. OF COLORADO 13 mo

Wells (7)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
6GRAYROCK ENERGY II, LLC34,0012001-03-20
9GRAYROCK ENERGY II, LLC13,5002001-03-20
1WGRAYROCK ENERGY II, LLC23,4001998-11-20
7GRAYROCK ENERGY II, LLC23,6001997-08-12
8GRAYROCK ENERGY II, LLC13,4001997-04-03
5GRAYROCK ENERGY II, LLC13,1501982-04-06
442-227-01070GRAYROCK ENERGY II, LLC------