DAVAN UNIT

Oil // district 8 // lease#10597

op: WINN OPERATING, LLC

cum_oil

499k BBL

cum_gas

0 MCF

wells

20

production

1993-01 — 2026-03

peak_month

1993-01

-- production_history

cum_oil: 498,916 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

3,986 BBL/mo

Di (annual)

11.3%

b-factor

0.3

EUR

544,311 BBL

R-squared

0.939

type

hyperbolic

-- wells (20)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
401COSTILLA ENERGY, INC.16,3001997-04-02
2202MUSSELMAN, OWEN & KING OPER.,INC15,6001992-03-25
2203MUSSELMAN, OWEN & KING OPER.,INC15,5001991-07-25
1001MUSSELMAN, OWEN & KING OPER.,INC15,5001989-04-07
1501MUSSELMAN, OWEN & KING OPER.,INC15,5501988-12-14
1604MUSSELMAN, OWEN & KING OPER.,INC15,5501988-08-17
1603MUSSELMAN, OWEN & KING OPER.,INC15,5001988-04-14
142-433-10154--------
1142-433-10049--------
16242-433-80642--------
17142-433-80643--------
17242-433-80644--------
1842-433-10065--------
19242-433-10200--------
2042-433-01811--------
2242-433-10068--------
342-433-80634--------
442-433-80635--------
842-433-10053--------
942-433-10050--------
EOF // data source: Texas Railroad Commission // 2026