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K. SIERRA #4-20

API 3505123168 · Grady County, Oklahoma

PAGAS
API
3505123168
Operator
MACK ENERGY CO.
County
Grady
Location
Sec 20 03N 05W (IM)

Drilling permits

Oklahoma files 2 applications to drill this well, naming 6 target formations. A permit records what an operator asked to do, not what it did. A target formation is where the operator aimed, and the hole may have missed it, stopped short of it or never been drilled.

Filed 2004-01-05

WRADR
Permit API
35051231680000
Operator
MARATHON OIL COMPANY LLC
Well type
GAS
Approved
2004-01-05
Expires
2004-07-05
Proposed depth
19,500 ft
Surface casing
650 ft
Ground elevation
1,212 ft

Target formations

FormationExpected top (ft)
MCLISH15,900
OIL CREEK16,200
ARBUCKLE17,300

An expected top is the depth the operator predicted before drilling, on the application it filed with Oklahoma. It is not a measurement of where the formation was found.

Filed 2011-03-09

WRARCDirectional hole
Permit API
35051231680001
Operator
MARATHON OIL COMPANY LLC
Well type
GAS
Approved
2011-03-09
Expires
2011-09-09
Proposed depth
18,750 ft
Surface casing
733 ft
Ground elevation
1,212 ft

Target formations

FormationExpected top (ft)
SYCAMORE13,136
WOODFORD13,370
HUNTON13,614

An expected top is the depth the operator predicted before drilling, on the application it filed with Oklahoma. It is not a measurement of where the formation was found.

Location

34.722178, -97.745250

34.72218, -97.74525 · Surface location as filed with Oklahoma

Every well in Grady County, Oklahoma

Oklahoma state record, from OK_wells_rbdms-wells.parquet. Corpus built 2026-09-11.