OPERATORS · RRC 123680 · P-5 STATUS Y

Caldwell Oil & Gas Co., Inc

Austin, TX

Caldwell Oil & Gas CO., Inc has filed no drilling permits in the past 12 months; its most recent permit was issued April 3, 1985.

The RRC wellbore file lists 7 wells under its operatorship.

58 drilling permits have been issued to this operator number since 1977; its P-5 organization report was last filed February 4, 1994.

0: permits, last 12 months
—: vs prior 12 months (0)
0: counties, 12 months
0: producing wells, of 7 of record
0: 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.

9%: spud rate · 5 of 58 mature permits
15: median days permit to spud · middle half 6–56
0: spuds, last 180 days
0%: cancelled · 0 permits
53: expired undrilled
7: permits a year over 8 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
Caldwell county →	—	41	4	Apr 3, 1985
Zavala county →	—	17	2	May 17, 1979

All 58 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
Wilcox	3	0
Navarro	3	0
Austin Chalk	2	0
Buda	2	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
0: 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

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

How it got them

3: permitted itself
0: acquired from others
31: permitted, now run by others

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

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	56
Other	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
J.A. Spiller (Olmos)44900400	2	0
Luling-Branyon55679001	2	0
Carolina-Tex (2300-A)15829581	1	0
Spiller85167001	1	0
Wildcat2001	1	0

P-5 organization report

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

Registration: Status code Y; Last filed Feb 4, 1994

Address: P O Box 1111; Austin, TX 78767

Officers and agents: Spiller, J. A. · President; Spiller, Robert S. · Vice President; Spiller, Mary Olson · Secretary

Latest permits

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

Permit	Seen	Issued	Operator	County	Lease / well	Depth	API
271399	Apr 3, 1985	Apr 3, 1985	Caldwell Oil & Gas Co., Inc.	Caldwell	Blackwell, Joe E. "A" #12R	2,300	05533876
271396	Apr 3, 1985	Apr 3, 1985	Caldwell Oil & Gas Co., Inc.	Caldwell	Blackwell, Joe E. et AL #8R	2,300	05533875
196749	May 31, 1983	May 31, 1983	Caldwell Oil & Gas Co., Inc.	Caldwell	Blackwell, Joe et AL #34	1,800	05533197
196748	May 31, 1983	May 31, 1983	Caldwell Oil & Gas Co., Inc.	Caldwell	Blackwell, Joe et AL #33	1,800	05533196
196747	May 31, 1983	May 31, 1983	Caldwell Oil & Gas Co., Inc.	Caldwell	Blackwell, Joe et AL #32	1,800	05533195
196746	May 31, 1983	May 31, 1983	Caldwell Oil & Gas Co., Inc.	Caldwell	Blackwell, Joe et AL #31	1,800	05533194
196744	May 31, 1983	May 31, 1983	Caldwell Oil & Gas Co., Inc.	Caldwell	Blackwell, Joe et AL #30	1,800	05533193
196743	May 31, 1983	May 31, 1983	Caldwell Oil & Gas Co., Inc.	Caldwell	Blackwell, Joe et AL #29	1,800	05533192
196742	May 31, 1983	May 31, 1983	Caldwell Oil & Gas Co., Inc.	Caldwell	Huff et AL #12	2,000	05533191
196741	May 31, 1983	May 31, 1983	Caldwell Oil & Gas Co., Inc.	Caldwell	Huff et AL #11	2,000	05533190
196740	May 31, 1983	May 31, 1983	Caldwell Oil & Gas Co., Inc.	Caldwell	Huff et AL #10	2,000	05533189
196739	May 31, 1983	May 31, 1983	Caldwell Oil & Gas Co., Inc.	Caldwell	Huff et AL #9	2,000	05533188
196738	May 31, 1983	May 31, 1983	Caldwell Oil & Gas Co., Inc.	Caldwell	Huff et AL #8	2,000	05533187
196736	May 31, 1983	May 31, 1983	Caldwell Oil & Gas Co., Inc.	Caldwell	Huff et AL #7	2,000	05533186
196735	May 31, 1983	May 31, 1983	Caldwell Oil & Gas Co., Inc.	Caldwell	Huff et AL #6	2,000	05533185

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/123680, documented in the API reference.