PIERCE UNIT #4
API 3501924259 · Carter County, Oklahoma
AC2RIn
Injection
12 monthly filings with Oklahoma, Jan 2025 to Dec 2025.
Oklahoma well-type code
2RIn
Injection zone
PENNSYLVANIAN
Cumulative fluid injected
864,474 bbl
| Month | Fluid injected (bbl) | Max pressure (psi) |
|---|---|---|
| Dec 2025 | 68,733 | 400 |
| Nov 2025 | 67,367 | 400 |
| Oct 2025 | 78,719 | 400 |
| Sep 2025 | 70,184 | 400 |
| Aug 2025 | 68,484 | 400 |
| Jul 2025 | 66,345 | 400 |
| Jun 2025 | 75,285 | 550 |
| May 2025 | 77,571 | 550 |
| Apr 2025 | 74,366 | 550 |
| Mar 2025 | 74,709 | 550 |
| Feb 2025 | 65,559 | 550 |
| Jan 2025 | 77,152 | 550 |
A dash is a month the well filed with no figure in that column.
Drilling permit
Oklahoma files 1 application to drill this well, naming 5 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 1994-01-27
WRADRPermit API
35019242590000
Operator
MACK ENERGY CO.
Well type
2RIn
Approved
1994-01-27
Expires
1994-08-10
Proposed depth
4,300 ft
Surface casing
1,200 ft
Ground elevation
1,027 ft
Target formations
| Formation | Expected top (ft) |
|---|---|
| HOXBAR | 2,000 |
| EASON | 3,100 |
| TUSSY | 3,300 |
| CARPENTER | 3,800 |
| MORRIS /DES MOINES/ | 4,000 |
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
34.395000, -97.456020
34.39500, -97.45602 · Surface location as filed with Oklahoma⌘ or Ctrl + scroll to zoom
Every well in Carter County, Oklahoma
Oklahoma state record, from OK_wells_rbdms-wells.parquet. Corpus built 2026-09-11.