STS 'A'

Oil // district 1 // lease#17556

op: WELHAUSEN OPERATING COMPANY, LP

cum_oil

8k BBL

cum_gas

0 MCF

wells

8

production

2013-12 — 2018-06

peak_month

2014-06

-- production_history

cum_oil: 7,731 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

657 BBL/mo

Di (annual)

132.1%

b-factor

0.0

EUR

5,967 BBL

R-squared

0.779

type

exponential

-- wells (8)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1 SWELHAUSEN OPERATING COMPANY, LP310,0002018-12-20
2SWELHAUSEN OPERATING COMPANY, LP210,0002017-07-12
10HSIERRA RESOURCES, LLC19,4502015-07-23
8HSIERRA RESOURCES, LLC19,3602015-06-02
7HSIERRA RESOURCES, LLC19,8002015-04-13
6HSIERRA RESOURCES, LLC19,8002015-03-09
5HSIERRA RESOURCES, LLC19,8002014-10-31
4 HWELHAUSEN OPERATING COMPANY, LP110,0002014-07-01
EOF // data source: Texas Railroad Commission // 2026