Petrora

OPERATORS · RRC 484645  · P-5 STATUS Y

Landmark Expl Inc

Caldwell, TX

Watch this operator

Landmark Expl Inc has filed no drilling permits in the past 12 months; its most recent permit was issued September 2, 1997.

The RRC wellbore file lists 17 wells under its operatorship.

48 drilling permits have been issued to this operator number since 1981; its P-5 organization report was last filed April 8, 2022.

0
permits, last 12 months
—
vs prior 12 months (0)
0
counties, 12 months
0
producing wells, of 17 of record
12
leases it reports
—
horizontal, 12 months

WINDOWS ON THE RRC ISSUE DATE · COMPUTED OCT 29, 2026

From permit to spud

FROM THE DATES ON ITS W-1 PERMITS · ALL TIME

A permit is a plan, not a well. These figures count only permits old enough to have spudded, six months and more, and read the spud, cancel, and expiry dates the RRC records on each one.

29%
spud rate · 14 of 48 mature permits
6
median days permit to spud · middle half 3–13
0
spuds, last 180 days
0%
cancelled · 0 permits
34
expired undrilled
3
permits a year over 17 active years

Where

Counties by permits in the last 12 months, with all-time permits and current wells of record there.

County12 moAll timeWellsLast
Burleson county →—4614Sep 2, 1997
Brazos county →—23Aug 11, 1983

All 48 permits, searchable → · Leases it reports → · On the map →

Formations in its completed wells

Tops reported on completion filings for wells it operates. RRC wellbore file. About tops →

FormationWellsPermitted last 3 yrs
Austin Chalk140
Eagle Ford120
Buda40
Pecan Gap30
Georgetown30
Wilcox10
Navarro10
Woodbine10

Production by month

PDQ LEASE REPORTS · REPORTED THROUGH APR 2026

Barrels on leases where this operator filed the production report. Lease-level by design; the latest months are revised upward as late reports arrive. How production is reported →

0
bbl oil, last 12 reported months
—
vs the 12 months before
0
mcf gas incl. casinghead, last 12
228K
bbl oil since reporting began

No lease production reported under this operator number in the last three years.

Beyond the permit record

RRC wellbore file

Wells of record

17
on the schedule
0
producing
0
shut in
0
injection
0
temp. abandoned
13
plugged

How it got them

13
permitted itself
4
acquired from others
20
permitted, now run by others

Acquired means the well's permit names a different operator than the schedule does today. Transfers and operator numbers →

RRC UIC permits · H-10 reported volumes

Disposal and injection

0
active UIC permits of 1
0
permitted bbl/day, active
0
bbl injected, last 12 reported months
Jun 2025
reported through

By county

Burleson0 active0 bbl/d

Permitted volume is a ceiling, not throughput. How to read it →

Permit types

Last 12 months against the prior 12, and all time. A type opens the permit history filtered to it. What the types mean →

Type12 moPrior 12All time
Drill0038
Recompletion0010

Fields

RRC regulatory fields with the most wells of record under this operator. The field opens its page; the count opens this operator's wells in it.

FieldWellsProducing
Giddings (Austin Chalk-3)3473350070
Caldwell (Austin Chalk)1471050060
Kurten (Buda)5042450020
Caldwell (Georgetown)1471066010
Caldwell NE (Georgetown)1471350010

P-5 organization report

As registered with the RRC. About the P-5 →

Registration
Status code Y
Last filed Apr 8, 2022
Address
PO Box 907
Caldwell, TX 77836
(979) 587-9300
Officers and agents
Martensen, Kim · President/Treasurer
Strong, Suzanne Chmelar · Vice President/Secretary

Latest permits

NEWEST FIRST BY ISSUE DATE · FILED OR ON WELLS IT NOW OPERATES

PermitSeenIssuedOperatorCountyLease / wellDepthAPI
467090Sep 2, 1997Sep 2, 1997Landmark Exploration Inc.BurlesonChmelar, Emanuel #1H9,00005133564
467090Sep 2, 1997Sep 2, 1997Landmark Exploration Inc.BurlesonChmelar, Emanuel #1H9,00005133564
467090Sep 2, 1997Sep 2, 1997Landmark Exploration Inc.BurlesonChmelar, Emanuel #1H9,00005133564
461569Apr 24, 1997Apr 24, 1997Landmark Exploration Inc.BurlesonBowers-Piwonka #1H8,30005133555
460581Apr 1, 1997Apr 1, 1997Landmark Exploration Inc.BurlesonCircle "C" #1H8,50005130720
460581Apr 1, 1997Apr 1, 1997Landmark Exploration Inc.BurlesonCircle "C" #1H8,99905130720
454914Nov 8, 1996Nov 8, 1996Landmark Exploration Inc.BurlesonChmelar, Frank #3XH7,80005133536
454914Nov 8, 1996Nov 8, 1996Landmark Exploration Inc.BurlesonChmelar, Frank #3XH9,00005133536
454018Oct 17, 1996Oct 17, 1996Landmark Exploration Inc.BurlesonCecelia - Bedford Unit #1H7,60005132823
454018Oct 17, 1996Oct 17, 1996Landmark Exploration Inc.BurlesonCecelia - Bedford Unit #1H9,00005132823
447736Jun 6, 1996Jun 6, 1996Landmark Exploration Inc.BurlesonChemelar, F. J. No. 1 #1H8,70005130866
384574Feb 12, 1991Feb 12, 1991Landmark Exploration Inc.BurlesonBaisy-Washington #1H11,70005133200
384574Feb 12, 1991Feb 12, 1991Landmark Exploration Inc.BurlesonBaisy-Washington #1H10,85005133200
381289Nov 27, 1990Nov 27, 1990Landmark Exploration Inc.BurlesonNeil #1H12,15005133156
379940Oct 22, 1990Oct 22, 1990Landmark Exploration Inc.BurlesonDella #1H10,19005133135

Full permit history →

About this data

Registration from the RRC P-5 organization report, refreshed weekly. Permits from the OGA049M master and daily daf420 files; wells of record from the EWA wellbore schedule; production from PDQ lease reports at the last vintage; disposal from UIC permits and H-10 reports. Summary figures are rebuilt nightly.

Developers: this page as JSON is GET /v1/data/operators/tx/484645, documented in the API reference.