LEHN-APCO, SOUTH (ELLEN), District 08, Texas
A field is the Railroad Commission's unit of geology and of regulation. Its spacing rule is what decides how many wells an acreage can hold.
Our estimate: volumes the operator filed with the Commission, valued at the EIA first-purchase price for that month. It is not a payment anyone received, and it is not a royalty. It sums the 7 leases in this field that have a page here — 88% of the register's 8 — so it understates the field.
Production, 2025
The Railroad Commission's Oil and Gas Annual Report for 2025, its most recent. These are the state's figures for the whole field, not ours.
| Wells | In the field | Producing | Produced in 2025 | Also produced | Cumulative |
|---|---|---|---|---|---|
| Oil | 4 | 2 | 4,105 bbl | 0 mcfcasinghead | 1,264,255 bblsince discovery |
The discovery well's oil measured 44.2° API gravity, perforated at 4,740 ft.
Spacing rule
What the Commission requires of a well on this field.
County
Leases in this field
Every lease here files this field's number with the Commission and has a page on this site.
| Lease | Operator | Value |
|---|---|---|
| CHALKLEY | OLSEN ENERGY INC. | $2.0 M |
| MERCHANT STATE | OLSEN ENERGY INC. | $1.1 M |
| RAYNER | OLSEN ENERGY INC. | $928 k |
| CHALKLEY -B- | MBR RESOURCES, INC. | $136 k |
| IOWA REALTY TRUST -A- | PEDCO RESOURCES COMPANY | $53 k |
| TAFT | UNIT PETROLEUM COMPANY | $8 k |
| CHALKLEY "A" | OLSEN ENERGY INC. | $3 k |
Field number 53009500, from the Railroad Commission's field register. The register's own index resolves 8 leases and 17 wells to this field by name, over every lease in Texas rather than only those with a page here. It resolves a lease by NAME and refuses an ambiguous one, so it counts nothing for a field that shares its name with another — which is why the lease count above comes from the field number instead.