GRANTHAM 12

Oil // district 10 // lease#40744

op: 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
EOF // data source: Texas Railroad Commission // 2026