LEASES · O-1-9729 · OIL · DISTRICT 01
Diamond Head -A-
ReportingCalk, Roger D. · Atascosa County · C.J.P. (Reef) field
Diamond Head -A- is an RRC oil lease (O-1-9729) in Atascosa County operated by Calk, Roger D., with 3 wells completed on it.
It has reported 18.2K barrels of oil and 54 mcf of gas since January 1993, last reporting volume in March 2026 (statewide data runs through April 2026).
The last 12 reported months total 289 barrels of oil, up 25% on the year before; the lease peaked at 519 barrels in April 1998.
5 operators have filed production on it, most recently Calk, Roger D. since June 2009.
- 18.2K
- bbl oil, all reported
- 54
- mcf gas incl. casinghead
- 289
- bbl oil, last 12 reported
- +25%
- vs the 12 before
- 3
- wells completed on it
- 519
- peak month, bbl (Apr 1998)
PDQ LEASE REPORTS · FIRST JAN 1993 · LAST VOLUME MAR 2026 · STATEWIDE DATA THROUGH APR 2026
Oil by month
Barrels reported on Form PR for the whole lease. The latest months are revised upward as late reports arrive.
Last 12 months 289 · prior 12 231(+25%)
Gas by month
Gas-well gas plus casinghead gas, mcf. On an oil lease all gas is reported as casinghead. The latest months are revised upward as late reports arrive.
Last 12 months 0 · prior 12 0
Decline curve
None shown. Petrora fits an Arps curve only when the last ten years of oil reports follow one decline closely enough to project (R² of 0.7 or better over at least a year since the peak). This lease's recent history does not, so a projection would be a guess dressed as a number.
Who reported it
Each run of months one operator filed the production report, oldest first.
- Chase-Mann Petroleum Incorp.Jan 1993 → Feb 1998 · 62 mo
- Property Development Group, Inc.Mar 1998 → May 2004 · 75 mo
- Horizon Ridge Oil CompanyJun 2004 → Feb 2008 · 45 mo
- Sto Operating CompanyMar 2008 → May 2009 · 15 mo
- Calk, Roger D.Jun 2009 → Jul 2026 · 206 mo
Wells on the lease
FROM COMPLETION REPORTS · PRODUCTION ABOVE IS THEIR TOTAL
3
wells completed on the lease
- Producing
- 2
- NO Type on File
- 1
Operates them now
About this data
Monthly oil, gas, and casinghead from the RRC PDQ production dump, which lags the reporting month by two to three months; figures shown through Apr 2026. Wells from completion reports; operator runs from who filed each month's report.
Developers: this page as JSON is GET /v1/data/leases/tx/o-1-9729, documented in the API reference.