OPERATORS · RRC 518668 · P-5 STATUS Y

M & R Expl Co

Houston, TX

M & R Expl CO has filed no drilling permits in the past 12 months; its most recent permit was issued April 22, 1994.

The RRC wellbore file lists 4 wells under its operatorship.

20 drilling permits have been issued to this operator number since 1989; its P-5 organization report was last filed October 3, 1997.

0: permits, last 12 months
—: vs prior 12 months (0)
0: counties, 12 months
0: producing wells, of 4 of record
3: 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.

65%: spud rate · 13 of 20 mature permits
26: median days permit to spud · middle half 14–88
0: spuds, last 180 days
0%: cancelled · 0 permits
7: expired undrilled
4: permits a year over 5 active years

Where

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

County	12 mo	All time	Wells	Last
Harris county →	—	13	2	Apr 22, 1994
Chambers county →	—	3	0	Oct 21, 1991
Wharton county →	—	2	0	Sep 5, 1991
Colorado county →	—	1	0	Aug 1, 1989
Webb county →	—	1	1	Sep 23, 1991

All 20 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 →

Formation	Wells	Permitted last 3 yrs
Frio	3	0
Miocene (undifferentiated)	2	0
Carrizo	1	0

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
203K: 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

4: on the schedule
0: producing
0: shut in
0: injection
0: temp. abandoned
4: plugged

How it got them

2: permitted itself
1: acquired from others
7: 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

Harris

0 active

0 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 →

Type	12 mo	Prior 12	All time
Drill	0	0	13
Reenter	0	0	5
Recompletion	0	0	2

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.

Field	Wells	Producing
Giddings (Austin Chalk Gas)34773550	1	0
Houston South42908001	1	0
Houston South (Oligocene)42908550	1	0
Wildcat8001	1	0

P-5 organization report

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

Registration: Status code Y; Last filed Oct 3, 1997

Address: 6776 Southwest Freeway Ste 620; Houston, TX 77074

Officers and agents: Massey, Randall W. · President; Massey, Mark H. · Vice President

Latest permits

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

Permit	Seen	Issued	Operator	County	Lease / well	Depth	API
421614	Apr 22, 1994	Apr 22, 1994	M & R Exploration Company	Harris	Drilling District 7 #4	5,000	20107872
421613	Apr 22, 1994	Apr 22, 1994	M & R Exploration Company	Harris	Drilling District 22 #4	5,000	20107871
411621	Jun 18, 1993	Jun 18, 1993	M & R Exploration Company	Harris	Drilling District #22 #6	5,204	20130583
411620	Jun 18, 1993	Jun 18, 1993	M & R Exploration Company	Harris	Drilling District #22 #5	5,335	20130353
410480	Apr 9, 1993	Apr 9, 1993	M & R Exploration Company	Harris	Wyndelts, C. J. #6	5,305	20130811
406999	Dec 8, 1992	Dec 8, 1992	M & R Exploration Company	Harris	Wyndelts #9	5,500	20132301
402240	Sep 25, 1992	Sep 25, 1992	M & R Exploration Company	Harris	Pappas #7A	5,500	20132294
397712	May 12, 1992	May 12, 1992	M & R Exploration Company	Harris	Pappas #7	5,500	20132276
393037	Oct 21, 1991	Oct 21, 1991	M & R Exploration Company	Chambers	Gordon #6	6,000	07131980
392321	Sep 30, 1991	Sep 30, 1991	M & R Exploration Company	Chambers	Larry #4	6,000	07131978
392320	Sep 30, 1991	Sep 30, 1991	M & R Exploration Company	Chambers	Lee #3	6,000	07131977
392029	Sep 23, 1991	Sep 23, 1991	M & R Exploration Company	Webb	Traylor Ranch #1	7,300	47935311
391589	Sep 5, 1991	Sep 5, 1991	M & R Exploration Company	Wharton	DE Friend, Charlotte Ann #1	4,967	48133245
388038	Jun 21, 1991	Jun 21, 1991	M & R Exploration Company	Wharton	Defriend, Charlotte Ann #1	4,967	48133245
387982	May 16, 1991	May 16, 1991	M & R Exploration Company	Harris	Matthews #6	5,100	20132233

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/518668, documented in the API reference.