GRANTHAM 12

Oil · District 10 · Lease #40744

Operator: DIAMONDBACK E&P LLC

Cum Oil

253k BBL

Cum Gas

0 MCF

Wells

5

Production

2011-01 — 2026-03

Peak Month

2012-07

Production History

Cum Oil: 252,521 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

3,013 BBL/mo

Di (annual)

16.4%

b-factor

0.0

EUR

219,738 BBL

R-squared

0.311

type

exponential

Wells (5)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
5COBRA OIL & GAS CORPORATION112,0002014-07-11
4COBRA OIL & GAS CORPORATION112,0002014-03-03
3COBRA OIL & GAS CORPORATION112,0002012-02-09
2COBRA OIL & GAS CORPORATION112,0002011-08-05
1COBRA OIL & GAS CORPORATION312,0002011-04-19
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