WELL · 42-055-35155 · DISTRICT 1
Mercer 4H Unit #4H
Caldwell County · Luling-Branyon field · Producing · Horizontal
Mercer 4h Unit #4H (API 42-055-35155) is a horizontal well in Caldwell County operated by Texas Petroleum Investment CO., completed March 22, 2020 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued November 20, 2019, permitted to 2,200 ft.
Completion filings report 3 formation tops, including Austin Chalk, Buda, Edwards.
Its lease has reported 79.3K barrels of oil since March 2020, last reporting in July 2026.
Operator of record
Texas Petroleum Investment Co.
Houston, TX · P-5 Y, filed Jul 4, 2026 · 233 permits on file · (888) 214-3575
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Texas Petroleum Investment Co. |
| Production reports | Texas Petroleum Investment Co.through Apr 2026 |
| Latest permit | Texas Petroleum Investment Co.Nov 20, 2019 |
- 2,200
- total depth, ft
- 1
- permits on file
- Nov 20, 2019
- last permit issued
- Mar 22, 2020
- completed
- 79.3K
- cumulative oil, bbl
- 0
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Mar 2020 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Mar 22, 2020
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active
Surface location
29.755720, -97.698711
OpenStreetMap → · Google Maps →
Permit surface location from the RRC GIS record, in Caldwell County.
Lease production
PDQ LEASE REPORTS · REPORTED THROUGH APR 2026
Texas reports oil by lease, not by well. These are the lease this well is completed on; this well is the only one on it.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Mercer 4H Unit O-1-20153 | Luling-Branyon | Texas Petroleum Investment Co. | 1 | 79.3K | 0 | Mar 2020 – Jul 2026 |
Oil, barrels lease total
Last 12 months 6,157 · prior 12 7,074(-13%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Texas Petroleum Investment Co.Mar 2020 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 859078-99 | Drill | Texas Petroleum Investment Co. | Nov 13, 2019 | Nov 20, 2019 | Mar 10, 2020 | 2,200 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-1-20153 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 502 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Austin Chalk | 1,742 | -1,240 |
| BudaBUDA - DISPOSAL | 1,967 | -1,465 |
| EdwardsEDWARDS - H2S, DISPOSAL | 2,134 | -1,632 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 2,546 | 4,635 | Open hole |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 7.625 | 2,546 | 9.875 | 450 S |
Completion filings
W-2 and G-1 reports on record in the RRC wellbore file, newest first. The suffix identifies the wellbore or completion event. About these reports →
| Suffix | Filed | W-2 / G-1 date | Logs referenced |
|---|---|---|---|
| 00 | Jun 29, 2020 | Apr 20, 2020 | Yes |
The source documents
Petrora holds the structured record. The scanned filings live at the RRC; these links open its search already filled in for this API.
- Wellbore filings for 42-055-35155 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-055-35155 → scanned completion filings
Log images are in archives with no per-well link: the RRC's Neubus archive (2004 onward). then paste it into their search.
Nearby wells and their tops
NEAREST 8 LOCATED WELLS WITH TOPS · WITHIN 16 KM
Draw a cross-section
This well's tops beside its 5 nearest neighbours, subsea-aligned so they line up regardless of surface terrain.
Mercer 3H Unit42-055-35106
0.0 KM · Texas Petroleum Investment Co. · Section with this well →
| Austin Chalk | 1,698 | -1,199 |
| Buda | 1,963 | -1,464 |
| Edwards | 2,128 | -1,629 |
Mercer 7H Unit42-055-35177
0.1 KM · Texas Petroleum Investment Co. · Section with this well →
| Austin Chalk | 1,749 | -1,244 |
| Buda | 1,976 | -1,471 |
| Edwards | 2,150 | -1,645 |
Tabor, W.H.42-055-34582
0.4 KM · Texas Petroleum Investment Co. · Section with this well →
| Austin Chalk | 1,769 | -1,287 |
| Buda | 1,930 | -1,448 |
| Edwards | 2,093 | -1,611 |
Mercer, W.F.42-055-34782
0.5 KM · Vintage Petroleum, Inc. · Section with this well →
| Austin Chalk | 1,760 | -1,272 |
| Buda | 1,932 | -1,444 |
| Del Rio | 2,008 | -1,520 |
| Georgetown | 2,063 | -1,575 |
| Edwards | 2,083 | -1,595 |
Mercer, Alf42-055-35167
0.5 KM · Texas Petroleum Investment Co. · Section with this well →
| Austin Chalk | 1,699 | -1,202 |
| Buda | 1,920 | -1,423 |
| Edwards | 2,084 | -1,587 |
Mercer, Alf42-055-34793
0.5 KM · Vintage Petroleum, Inc. · Section with this well →
| Del Rio | 2,015 | -1,573 |
| Georgetown | 2,060 | -1,618 |
| Edwards | 2,137 | -1,695 |
Mercer, Mattie42-055-35178
0.7 KM · Texas Petroleum Investment Co. · Section with this well →
| Austin Chalk | 1,782 | -1,302 |
| Buda | 2,016 | -1,536 |
| Edwards | 2,188 | -1,708 |
Tabor, W.H.42-055-35166
0.7 KM · Texas Petroleum Investment Co. · Section with this well →
| Austin Chalk | 1,712 | -1,220 |
| Buda | 1,940 | -1,448 |
| Edwards | 2,103 | -1,611 |
About this data
Permits from the RRC OGA049M master and daily daf420 files; wellbore and operator of record from the EWA schedule, weekly; completions, formation tops, casing, and perforations from the dbf900 wellbore file; production from PDQ lease reports, which lag two to three months; injection from UIC permits, H-10 reports, and TexNet daily volumes; earthquakes from the TexNet catalog.
New to these records? How to read a well page · API numbers · completion reports and tops · why production is by lease
Developers: this page as JSON is GET /v1/data/wells/05535155, documented in the API reference.