TUNDER #1-31

API 3505922627 · Harper County, Oklahoma

ACGAS

API

3505922627

Operator

STEPHENS EXPLORATION INC

County

Harper

Location

Sec 31 28N 21W (IM)

Completion

Oklahoma files 1 completion report for this well. One carries a production test the operator filed.

Completion 0

STRAIGHT HOLEACGAS

Spudded

2014-10-10

Drilling finished

2014-10-19

Completed

2015-01-06

First production

2015-01-07

Total depth

6,300 ft

Operator

STEPHENS EXPLORATION INC

Intervals

Formation	Produced	Perforated (ft)	Treatment
KANSAS CITY	OIL	5,302–5,314	Acid
OSWEGO	GAS	5,495–5,516	Acid

Production tests

Tested	Oil (bbl/d)	Gas (MCF/d)	Water (bbl/d)	Gravity (°API)	Shut-in (psi)	Choke
2014-12-22	28	15	14	43.4	840	32/64
2015-12-15	0	350	108	—	1,100	32/64

A production test is one measurement the operator made on one day and filed with Oklahoma. It is not a monthly average and it does not describe how the well produced afterwards. The choke size is shown exactly as filed: Oklahoma records it in inches on some reports and in sixty-fourths of an inch on others, and names the unit on neither. A dash is a measurement Oklahoma did not file, or one it filed outside any physically possible range.

Casing

String	Size (in)	Weight (lb/ft)	Grade	Set (ft)	Cement (sacks)
PRODUCTION	4-1/2"	11.6#	J55	6,282	300
SURFACE	8-5/8	24#	J55	746	425

Drilling permit

Oklahoma files 1 application 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 2014-10-06

WRADRStraight hole

Permit API

35059226270000

Operator

STEPHENS EXPLORATION INC

Well type

GAS

Approved

2014-10-06

Expires

2015-04-06

Proposed depth

6,300 ft

Surface casing

850 ft

Ground elevation

1,800 ft

Target formations

Formation	Expected top (ft)
TONKAWA	4,500
LANSING	4,700
KANSAS CITY	5,100
OSWEGO	5,400
ATOKA	5,600
MORROW	5,650

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

36.857719, -99.497509

36.85772, -99.49751 · Surface location as filed with Oklahoma⌘ or Ctrl + scroll to zoom

Every well in Harper County, Oklahoma

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