Zavala County Drilling Permits

Every permit issued by the Texas Railroad Commission in Zavala County — updated daily, data through 2026-07-10.

Zavala County permitting is running 3.3 permits a month over the trailing 90 days (10 total, versus 6 in the prior quarter). CML EXPLORATION, LLC leads with 7 permits in the past 12 months, one of 6 operators active in the county.

Last 30 Days

Operators (30d)

Latest Permit

2026-07-10

All Time

3,561

3,561 permits

ISSUED	PERMIT	API	LEASE	OPERATOR	TYPE	DEPTH	HZ
2017-12-07	833698	42-507-33308	SOLA VACA NORTE #A 2EF	U.S. ENERGY DEVELOPMENT CORP	DRILL	9,000	Y
2017-12-07	833698	42-507-33308	SOLA VACA NORTE #A 2EF	U.S. ENERGY DEVELOPMENT CORP	DRILL	6,000	Y
2017-12-07	833698	42-507-33308	SOLA VACA NORTE #A 2EF	U.S. ENERGY DEVELOPMENT CORP	DRILL	5,358	Y
2017-12-04	833695	42-507-33307	SOLA VACA NORTE #A 1EF	U.S. ENERGY DEVELOPMENT CORP	DRILL	9,000	Y
2017-12-04	833695	42-507-33307	SOLA VACA NORTE #A 1EF	U.S. ENERGY DEVELOPMENT CORP	DRILL	9,000	Y
2017-12-04	833695	42-507-33307	SOLA VACA NORTE #A 1EF	U.S. ENERGY DEVELOPMENT CORP	DRILL	6,000	Y
2017-12-04	833695	42-507-33307	SOLA VACA NORTE #A 1EF	U.S. ENERGY DEVELOPMENT CORP	DRILL	5,348	Y
2017-11-30	833526	42-507-33306	KLEIMANN #1	CML EXPLORATION, LLC	DRILL	7,500	Y
2017-11-30	833308	42-507-33305	KM-WINTERBOTHAM UNIT ZAV #1H	EXCO OPERATING COMPANY, LP	DRILL	7,000	Y
2017-11-21	833102	42-507-33304	BAUERLE UNIT ZAV #1H	EXCO OPERATING COMPANY, LP	DRILL	7,000	Y
2017-11-21	833102	42-507-33304	BAUERLE UNIT ZAV #1H	EXCO OPERATING COMPANY, LP	DRILL	7,000	Y
2017-11-15	833094	42-507-33303	MARY ELLEN HOLDSWORTH #2	INLAND OCEAN, INC.	DRILL	4,000
2017-10-20	831846	42-507-33302	PARSONS-HIMEBROOK #1	CML EXPLORATION, LLC	DRILL	6,750	Y
2017-09-29	831360	42-507-33301	RECTIFIER BW-4 #4BW	ENTERPRISE PRODUCTS OPERATINGLLC	DRILL	400
2017-08-09	829556	42-507-33300	MUSTANG RANCH #1H	CML EXPLORATION, LLC	DRILL	6,750	Y
2017-08-09	829556	42-507-33300	MUSTANG RANCH #1H	CML EXPLORATION, LLC	DRILL	7,200	Y
2017-08-07	829453	42-507-33299	BEELER RANCH #1	CML EXPLORATION, LLC	DRILL	7,400	Y
2017-06-01	826771	42-507-33298	LANDER #1	CML EXPLORATION, LLC	DRILL	7,500	Y
2017-06-01	826771	42-507-33298	LANDER #1	CML EXPLORATION, LLC	DRILL	7,244	Y
2017-05-18	826504	42-507-33297	MARY ELLEN HOLDSWORTH #1	INLAND OCEAN, INC.	DRILL	4,500
2017-05-18	826504	42-507-33297	MARY ELLEN HOLDSWORTH #1	INLAND OCEAN, INC.	DRILL	4,500
2017-04-26	825661	42-507-33296	CAROLYN #1	CML EXPLORATION, LLC	DRILL	7,400	Y
2017-04-26	825661	42-507-33296	CAROLYN #1	CML EXPLORATION, LLC	DRILL	7,400	Y
2017-04-26	825661	42-507-33296	CAROLYN #1	CML EXPLORATION, LLC	DRILL	7,495	Y
2017-04-12	825083	42-507-33294	GONZALES #1	CML EXPLORATION, LLC	DRILL	7,100	Y
2017-03-28	824518	42-507-33290	LLM SOUTH #A 2EF	U.S. ENERGY DEVELOPMENT CORP	DRILL	9,000	Y
2017-03-27	824519	42-507-33291	LLM SOUTH #A 3EF	U.S. ENERGY DEVELOPMENT CORP	DRILL	9,000	Y
2017-03-27	824517	42-507-33289	LLM SOUTH #A 1EF	U.S. ENERGY DEVELOPMENT CORP	DRILL	9,000	Y
2017-03-27	824517	42-507-33289	LLM SOUTH #A 1EF	U.S. ENERGY DEVELOPMENT CORP	DRILL	9,000	Y
2017-03-22	824390	42-507-33287	CHITTIM HEIRS #17H	BLACKBRUSH O & G, LLC	DRILL	5,500	Y
2017-03-21	824319	42-507-33288	CATHODIC PROTECTION #3	PLAINS PIPELINE L.P.	DRILL	350
2017-03-17	824216	42-507-33286	CHITTIM HEIRS #16H	BLACKBRUSH O & G, LLC	DRILL	5,500	Y
2017-02-28	823460	42-507-33285	DEL MONTE #1	CML EXPLORATION, LLC	DRILL	7,100	Y
2017-02-23	823558	42-507-33284	FERGUSON-MCKNIGHT #2811H	EL TORO RESOURCES LLC	DRILL	5,720	Y
2017-01-18	822165	42-507-33283	CHAD #1	CML EXPLORATION, LLC	DRILL	7,100	Y
2017-01-18	822165	42-507-33283	CHAD #1	CML EXPLORATION, LLC	DRILL	7,250	Y
2017-01-09	821501	42-507-33282	PECAN GROVE #1	CML EXPLORATION, LLC	DRILL	7,100	Y
2017-01-09	821501	42-507-33282	PECAN GROVE #1	CML EXPLORATION, LLC	DRILL	7,100	Y
2017-01-09	821501	42-507-33282	PECAN GROVE #1	CML EXPLORATION, LLC	DRILL	7,422	Y
2016-12-14	820775	42-507-33281	PARKWAY #1	CML EXPLORATION, LLC	DRILL	7,400	Y
2016-12-14	820775	42-507-33281	PARKWAY #1	CML EXPLORATION, LLC	DRILL	7,200	Y
2016-10-21	819288	42-507-33280	N BAUERLE UNIT #4H	AGERON ENERGY, LLC	DRILL	6,340	Y
2016-09-22	818397	42-507-33279	RHODES #1	CML EXPLORATION, LLC	DRILL	7,100	Y
2016-09-22	818397	42-507-33279	RHODES #1	CML EXPLORATION, LLC	DRILL	7,100	Y
2016-09-22	818397	42-507-33279	RHODES #1	CML EXPLORATION, LLC	DRILL	6,500	Y
2016-09-15	818285	42-507-33278	MILLER UNIT ZAV #2H	EXCO OPERATING COMPANY, LP	DRILL	9,000	Y
2016-09-15	818285	42-507-33278	MILLER UNIT ZAV #2H	EXCO OPERATING COMPANY, LP	DRILL	9,000	Y
2016-09-15	818283	42-507-33277	MILLER UNIT ZAV #1H	EXCO OPERATING COMPANY, LP	DRILL	9,000	Y
2016-09-15	818283	42-507-33277	MILLER UNIT ZAV #1H	EXCO OPERATING COMPANY, LP	DRILL	9,000	Y
2016-08-16	817441	42-507-33275	CHITTIM HEIRS #12H	BLACKBRUSH O & G, LLC	DRILL	5,250	Y

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Source: Texas Railroad Commission drilling permit master (OGA049M), refreshed daily. See also operators in Zavala County.