NAPPER "SA"
Operated by BTA OIL PRODUCERS (P-5 41860) in the MTS (SAN ANDRES) field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.
The Railroad Commission's own record for the field this lease produces from, including the spacing rule that governs how close together its wells may be drilled.
These are facts about the field, not about this lease. The field holds 29 leases and 89 wells, and the rule below applies to all of them.
A drilling unit in this field needs at least 20 acres. The field rule took effect on 1984-09-01.
The register flags this field for hydrogen sulphide. That is a poisonous gas that occurs naturally in some formations. The flag is a property of the field as the Commission records it. It is not a measurement taken at this lease, and it is not a statement that gas is escaping anywhere.
The Commission's schedule remark for this field reads: “20 AC. OPT., DIAG. 1500'”
Severance-tax incentive filings
Applications the operator filed to have this lease's gas taxed at a reduced state rate. A filing is an application, and this page never calls one a reduction that was granted.
| Programme | Filings | With an approval date | Dated | Docket |
|---|---|---|---|---|
| NGPA | 9 | none | — | — |
This says nothing about a royalty. A severance tax is charged to the operator. Whether a reduced rate reaches a royalty owner depends on the wording of the lease instrument, which is a private contract this site does not hold.
What this lease produced, and what it was worth
Oil and condensate are valued on the volume the state records as disposed of; gas and casinghead gas on the volume produced. They are different columns of different files, and the difference is not cosmetic.
| Stream | Basis | Volume | Value |
|---|---|---|---|
| Oil | Disposition | 7,675 bbl | $127,494 |
| Casinghead gas | Production | 2,991 Mcf | $0 |
| Total | $127,494 | ||
2,991 Mcf of this lease's gas, across 28 months, carries no value here. No free Texas wellhead gas price exists before 1997, so those months are left out of the total rather than valued at zero. The total above is therefore a floor, not an estimate.
Wells on this lease (15)
Every wellbore the Railroad Commission records against this lease key, with the depth, the last completion and the plug date exactly as filed. A well with no plug date is not stated to be producing — the state files no such flag.
These wells centre on 32.8640, -102.0418. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.9 miles.
What these wells add up to
Every figure below is counted over all of this lease's wells, not over the rows listed above. The Railroad Commission files two facts about a well's state — a plug date and a proration-schedule flag — and a well can carry both, so they are published as separate counts and never merged into a status.
What the state filed about each well
A plug date is the date the Commission recorded the wellbore as sealed with cement and abandoned. It is the only end-of-life fact Texas files. There is no "active" flag on a well, so this page does not print one — a well with no plug date is not stated to be producing.
How deep they were drilled
Total depth in feet, 15 of 15 wells. Median 4,952 ft, with the middle half between 4,945 and 5,028 ft; the shallowest is 4,940 ft and the deepest 7,900 ft. The median is published rather than the mean, because a single mis-keyed depth moves a mean and cannot move a median.
When they were last completed
Last completion by decade, 15 of 15 wells, Apr 1984 – May 1988. This is the LAST completion filed on each wellbore, not the first — a well recompleted in 2019 counts once, in the 2010s.
Last completion to plug: a median of 9.5 years across the 15 wells that filed both dates, with the middle half between 7.6 years and 9.8 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.
15 wells
| 42-11531659 | 2W | 7,850 ft | May 1988 | May 1995 | Yes |
| 42-11532011 | 6 | 4,944 ft | Nov 1987 | May 1994 | Yes |
| 42-11532107 | 13 | 4,952 ft | Nov 1987 | May 1995 | Yes |
| 42-11532021 | 5 | 5,100 ft | Oct 1987 | May 1995 | Yes |
| 42-11532121 | 16 | 4,947 ft | Oct 1987 | May 1995 | Yes |
| 42-11532123 | 17 | 4,942 ft | May 1987 | May 1995 | Yes |
| 42-11532059 | 14 W | 7,900 ft | Jun 1985 | May 1995 | Yes |
| 42-11532125 | 15 | 4,946 ft | Nov 1984 | Apr 1995 | Yes |
| 42-11532069 | 12 | 4,955 ft | Oct 1984 | Apr 1994 | Yes |
| 42-11532070 | 11 | 4,954 ft | Sep 1984 | May 1994 | Yes |
| 42-11532068 | 10 | 4,940 ft | Sep 1984 | Apr 1995 | Yes |
| 42-11532071 | 9 | 4,954 ft | Sep 1984 | Apr 1994 | Yes |
| 42-11532056 | 8 | 4,948 ft | Sep 1984 | Apr 1994 | Yes |
| 42-11532036 | 7 | 4,940 ft | Jul 1984 | Nov 1993 | Yes |
| 42-11531915 | 3 | 7,880 ft | Apr 1984 | Apr 1995 | Yes |
The API number is the state's, prefixed 42 for Texas. A well is matched to this lease by the lease key the Commission files on the wellbore record, so a well that has moved between leases appears under each one it was filed against.
Every month this lease reported (31)
Volume × price = value, one row per cycle. The price columns are the same series published on the prices page — nothing here is modelled.
31 months
| Jul 1995 | 0 | 0 | 15.24 | — | $0 |
| Jun 1995 | 0 | 0 | 16.41 | — | $0 |
| May 1995 | 0 | 0 | 17.56 | — | $0 |
| Apr 1995 | 498 | 120 | 17.73 | — | $8,830 |
| Mar 1995 | 0 | 120 | 16.44 | — | $0 |
| Feb 1995 | 13 | 120 | 16.58 | — | $216 |
| Jan 1995 | 0 | 120 | 15.92 | — | $0 |
| Dec 1994 | 0 | 120 | 15.03 | — | $0 |
| Nov 1994 | 0 | 120 | 15.90 | — | $0 |
| Oct 1994 | 0 | 120 | 15.58 | — | $0 |
| Sep 1994 | 0 | 30 | 15.29 | — | $0 |
| Aug 1994 | 0 | 30 | 16.13 | — | $0 |
| Jul 1994 | 1 | 30 | 17.56 | — | $18 |
| Jun 1994 | 310 | 30 | 17.09 | — | $5,298 |
| May 1994 | 0 | 30 | 15.88 | — | $0 |
| Apr 1994 | 0 | 30 | 14.14 | — | $0 |
| Mar 1994 | 321 | 30 | 12.46 | — | $4,000 |
| Feb 1994 | 3 | 30 | 12.50 | — | $38 |
| Jan 1994 | 93 | 126 | 12.66 | — | $1,177 |
| Dec 1993 | 0 | 128 | 12.33 | — | $0 |
| Nov 1993 | 321 | 128 | 14.49 | — | $4,651 |
| Oct 1993 | 647 | 126 | 15.85 | — | $10,255 |
| Sep 1993 | 324 | 127 | 15.03 | — | $4,870 |
| Aug 1993 | 640 | 126 | 15.66 | — | $10,022 |
| Jul 1993 | 638 | 130 | 15.46 | — | $9,863 |
| Jun 1993 | 319 | 126 | 16.79 | — | $5,356 |
| May 1993 | 954 | 127 | 17.68 | — | $16,867 |
| Apr 1993 | 639 | 126 | 18.05 | — | $11,534 |
| Mar 1993 | 656 | 317 | 18.14 | — | $11,900 |
| Feb 1993 | 645 | 127 | 17.90 | — | $11,546 |
| Jan 1993 | 653 | 197 | 16.93 | — | $11,055 |
How to read this page
The arithmetic is one multiplication per stream per month. Here it is, worked, on a real row from the table above.
Oil 498 bbl × $ 17.73 = $8,830 Casinghead gas 120 Mcf × no price — ──────────────────────────────────────────────────── Month total $8,830
The volumes are the state's, unchanged
Every barrel and every Mcf on this page is a number the Railroad Commission of Texas published in its monthly production query. Nothing is modelled, estimated or filled in.
The dollars are a multiplication, not a valuation
Volume × a published monthly price. It is not what the operator was paid: it takes no account of a contract, a differential, a transportation deduction, or the share any one owner holds.
Oil and gas are priced differently
Oil is a Texas realisation — the crude oil first purchase price. Gas is a benchmark, because no free Texas wellhead gas series exists at any date. The prices page publishes the difference rather than correcting it away.
A lease is not a well
The state reports oil on lease and gas on well, and this page is the lease grain. 8A/O/65020 is the state's own key, not one this site invented.