Harris County, Texas
Oil and gas wells in and near ZIP code 77521
- 4wells inside the ZIP
- 421within 3 miles of it
- 5drilling locations in two years
- 49square miles of land
The ZIP code and 3 miles around it
Wells and drilling locations in and around 77521
- Drilling locations5Permits issued in the last two years
- Producing wells252On a lease reporting production now
- Not producing26Shut in, inactive or no lease on record
- Plugged143The state's wellbore record says plugged
The solid line is ZIP code 77521 as the US Census Bureau draws it; the dashed line is 3 miles out. The counts are for everything inside the dashed line: 4 of the wells are inside the ZIP itself. Sources: Railroad Commission of Texas well layers and permit files, US Census Bureau ZIP Code Tabulation Areas and county outlines, town points from GeoNames (CC BY 4.0), base map from USGS The National Map.
Use this map on your site
You may show this map on any site, unchanged. Keep the credit line and its link to Royalty Clerk under the map. The picture updates by itself as the state records new wells and permits.
<a href="https://royaltyclerk.com/texas/zip/77521"><img src="https://royaltyclerk.com/maps/zip/77521.svg" alt="Map of ZIP code 77521, Texas, outlined, with 4 oil and gas wells inside it and 421 within 3 miles of its edge as dots, and 5 drilling locations permitted in two years." width="1000" height="1051" loading="lazy" style="max-width:100%;height:auto;border:0"></a>
<p style="margin:4px 0 0;font-size:14px">Map: <a href="https://royaltyclerk.com/texas/zip/77521">Oil and gas wells in ZIP code 77521, Texas</a> by Royalty Clerk, from Railroad Commission of Texas records</p>In numbers
Wells in 77521 and within 3 miles
| What | Inside 77521 | Within 3 miles |
|---|---|---|
| Producing wells | 1 | 252 |
| Not producing wells | 0 | 26 |
| Plugged wells | 3 | 143 |
| Drilling permits, last 24 months | 1 | 5 |
| All wells | 4 | 421 |
ZIP code 77521 covers 49 square miles of land and 0.9 of water: about 0.1 wells to the square mile.
Drilling locations
The newest drilling permits in and near 77521
| Issued | Lease and well | Where | Operator |
|---|---|---|---|
| 2026-02-13 | BROWN-FERRIS UNIT 1vertical · API 42-201-32063 · permit 0913245Frio Resources, LLC | in 7752129.83379, -94.95592 on OpenStreetMap (opens in a new tab) | Frio Resources, LLC |
| 2025-09-17 | FEE 3Avertical · API 42-071-32681 · permit 0910362Oneok Hydrocarbon Southwest, LLC | 1.4 mi outside29.85559, -94.89222 on OpenStreetMap (opens in a new tab) | Oneok Hydrocarbon Southwest, LLC |
| 2025-05-16 | FEE 16Avertical · API 42-071-32680 · permit 0908005Targa Downstream LLC | 0.9 mi outside29.84326, -94.89958 on OpenStreetMap (opens in a new tab) | Targa Downstream LLC |
| 2025-02-24 | CENTRAL STORAGE TERMINAL 3vertical · API 42-071-32679 · permit 0906049Mont Belvieu Caverns, LLC | 1.2 mi outside29.85220, -94.89504 on OpenStreetMap (opens in a new tab) | Mont Belvieu Caverns, LLC |
| 2025-01-23 | LONE STAR NGL MB CENTRAL TERM 24NTvertical · API 42-071-32678 · permit 0905364Energy Transfer Mt Belv Ngls LP | 0.6 mi outside29.85322, -94.90621 on OpenStreetMap (opens in a new tab) | Energy Transfer Mt Belv Ngls LP |
| 2024-10-31 | LONE STAR NGL MB CENTRAL TERM 22NTvertical · API 42-071-32677 · permit 0903714Energy Transfer Mt Belv Ngls LP | 0.6 mi outside29.85258, -94.90465 on OpenStreetMap (opens in a new tab) | Energy Transfer Mt Belv Ngls LP |
| 2024-08-23 | CENTRAL STORAGE TERMINAL 2vertical · API 42-071-32674 · permit 0902209Mont Belvieu Caverns, LLC | 1.2 mi outside29.85369, -94.89472 on OpenStreetMap (opens in a new tab) | Mont Belvieu Caverns, LLC |
| 2024-07-26 | MONT BELVIEU STORAGE 602vertical · API 42-071-32673 · permit 0901537Exxonmobil Pipeline Company LLC | 0.7 mi outside29.84475, -94.90277 on OpenStreetMap (opens in a new tab) | Exxonmobil Pipeline Company LLC |
| 2024-04-15 | MONT BELVIEU STORAGE 602vertical · API 42-071-32671 · permit 0898768Exxonmobil Pipeline Company LLC | 0.7 mi outside29.84478, -94.90268 on OpenStreetMap (opens in a new tab) | Exxonmobil Pipeline Company LLC |
| 2024-02-22 | FEE 30vertical · API 42-071-32670 · permit 0897407Targa Downstream LLC | 0.8 mi outside29.84405, -94.90176 on OpenStreetMap (opens in a new tab) | Targa Downstream LLC |
| 2023-10-24 | STATE LEASE 118426 JP 1vertical · API 42-201-33005 · permit 0894698Baywater Operating, LLC | 2.4 mi outside29.73768, -95.03345 on OpenStreetMap (opens in a new tab) | Baywater Operating, LLC |
A permit is permission to drill, not a well. Source: Railroad Commission of Texas drilling permits. This week's permits, statewide
Nearest wells
The wells nearest the middle of 77521
- 1Kensinger 11.7 mi NPlugged · API 42-201-32821 · Marquee Corporation · inside 77521
- 2Gulf Land & Investment Co. 11.8 mi NPlugged · API 42-201-31989 · Marquee Corporation · inside 77521
- 3Rein Trust 11.9 mi NProducing · API 42-201-32799 · Ballard Exploration Company,inc. · inside 77521
- 4Nash, Hannah 33.2 mi NPlugged · API 42-201-32082 · Magnum Producing, LP
- 5Nash 1ST3.2 mi NPlugged · API 42-071-32425 · Ballard Exploration Company,inc. · inside 77521
- 6Nash, Hannah 53.3 mi NPlugged · API 42-201-32122 · Magnum Producing, LP
Who runs them
Operators of the wells in 77521
- 1Ballard Exploration Company,inc.2 wells1 on producing leases
- 2Marquee Corporation2 wellsnone on a producing lease
Around it
Towns and ZIP codes around 77521
Towns
ZIP codes that touch 77521
All of Harris County: leases, operators and production · Harris County well map · Every Texas ZIP code
FAQ
Questions people ask
Are there oil or gas wells near 77521?
Yes. 4 oil and gas wells with a location on the state's map lie inside ZIP code 77521, 1 of them on producing leases, and 421 within 3 miles of its edge. The state issued 5 drilling permits with a well location within 3 miles in the last 24 months, the newest on February 13, 2026.
Is this the same area as the Postal Service's ZIP code?
Nearly. The Postal Service does not publish ZIP code boundaries, so we use the US Census Bureau's ZIP Code Tabulation Area for 77521, built from census blocks where most addresses use that ZIP. The edges can differ from mail delivery by a street or two, and a few ZIP codes (post office boxes, single buildings) have no area of their own.
Do I own minerals under a well in 77521?
A well nearby says nothing about who owns the minerals under it. The county's mineral roll lists who is paid on each producing lease. Search a name to see whether the Harris County roll lists it.
Where do the numbers come from?
Every dot is a well location from the Railroad Commission of Texas well layers, or a drilling permit's surface location from its permit files, issued in the last 24 months. A well counts as producing when its lease reported oil or gas in its newest months, and as plugged when the state's wellbore record says so. Nothing on this page comes from owners or from addresses.
Own land or minerals near 77521?
See whether a county roll lists your name, and get an email when a permit or a new well is filed near you.
Sources
This page is left out of search engines until 10 or more wells lie inside the ZIP.
- US Census Bureau, 2020 ZIP Code Tabulation Areas, cartographic boundary file at 1:500,000 (cb_2020_us_zcta520_500k)www2.census.gov/geo/tiger/GENZ2020/shp/cb_2020_us_zcta520_500k.zip · file of May 19, 2023, read November 14, 2026
- Railroad Commission of Texas, well layers and drilling permit fileswww.rrc.texas.gov/resource-center/research/data-sets-available-for-download/ · loaded as the state publishes them; figures kept six hours
- US Census Bureau, cartographic boundary files (county lines), through the us-atlas package 3.0.1www.census.gov/geographies/mapping-files/time-series/geo/cartographic-boundary.html · built into the site with its well maps
- GeoNames, towns and their points (CC BY 4.0)www.geonames.org/ · built into the site with its town pages
- USGS The National Map, basemap services (topo and imagery map under the wells), public domainapps.nationalmap.gov/services/ · tiles drawn under the map when it is made