HORTON BALLARD

Oil // district 1 // lease#10663

op: WELHAUSEN OPERATING COMPANY, LP

cum_oil

433k BBL

cum_gas

0 MCF

wells

9

production

1993-01 — 2026-03

peak_month

2008-08

-- production_history

cum_oil: 432,619 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

2,422 BBL/mo

Di (annual)

17.5%

b-factor

0.1

EUR

184,282 BBL

R-squared

0.918

type

hyperbolic

-- wells (9)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
11WELHAUSEN OPERATING COMPANY, LP111,0002008-04-07
9WELHAUSEN OPERATING COMPANY, LP310,0002006-07-20
10WELHAUSEN OPERATING COMPANY, LP110,0002006-03-29
6PENTAD DEVELOPMENT CORP. (A)19,9001985-12-30
3PENTAD DEVELOPMENT CORP. (A)19,9001985-12-18
1PENTAD DEVELOPMENT CORP. (A)19,9001985-10-29
8PENTAD DEVELOPMENT CORP. (A)19,9001985-10-29
2PORTAL DRILLING COMPANY19,9001985-10-11
5PORTAL DRILLING COMPANY19,9001985-10-11
EOF // multi-state drilling data platform // 2026