CALVIN (DEAN), District 7C, 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.

Leases
400
with a page here
Operators
62
Value, all time
$33.9 M
80% of the register's 498
Discovered
1965-11-17
Oil and gas

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 400 leases in this field that have a page here — 80% of the register's 498 — 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.

WellsIn the fieldProducingProduced in 2025Also producedCumulative
Oil000 bbl0 mcfcasinghead44,313,733 bblsince discovery
Gas000 mcf0 bblcondensate4,420,835 mcfsince 1970

This field filed no production for 2025. It remains on the Commission's schedules.

The discovery well's oil measured 40.0° API gravity, perforated at 7,370 ft.

Spacing rule

What the Commission requires of a well on this field.

WellsRuleEffectiveFrom the lease lineBetween wellsAcres per unitMax diagonal
GasB660 ft1,200 ft1604,200 ft
GasO660 ft1,200 ft803,250 ft
OilB660 ft1,200 ft1604,200 ft
OilO660 ft1,200 ft803,250 ft

Commission remarks: 7C,08-0209914

Counties

Leases in this field

Every lease here files this field's number with the Commission and has a page on this site.

Showing the 200 largest of 400 leases, by the value we compute. Every one of them is in the sitemap.

LeaseOperatorValue
NUNN, J. F. -A-COX, JOHN L.$1.0 M
GREER, O. L.BHP PETROLEUM (AMERICAS) INC.$750 k
LANE 44ODESSA EXPLORATION, INC.$612 k
HUTCHISON, M. B.STEPHENS, AUTRY C.$435 k
RICKER, RUPERT P., -KO-BHP PETROLEUM (AMERICAS) INC.$427 k
COX, C. J. "B"HANLEY PETROLEUM INC.$405 k
BRYANS, J. C. "B"PARKER & PARSLEY DEVELOPMENT L.P$374 k
CLARKSONSTEPHENS, AUTRY C.$364 k
CLARKSON ESTATESTEPHENS, AUTRY C.$361 k
PATTERSON, SUSANSTEPHENS, AUTRY C.$357 k
COPEMWJ PRODUCING COMPANY$351 k
PATTERSONGLOSSOP, ROBERT L.$329 k
MCMASTER, E. L.CITATION OIL & GAS CORP.$311 k
BOYD, FANNIESTEPHENS, AUTRY C.$303 k
RICKER, RUPERT P., -C-BHP PETROLEUM (AMERICAS) INC.$293 k
GREER, O. L., -C-BHP PETROLEUM (AMERICAS) INC.$284 k
WELLS, ONABHP PETROLEUM (AMERICAS) INC.$283 k
COX, C.J. "A"HANLEY PETROLEUM INC.$280 k
RICKER, RUPERT P., -F-BHP PETROLEUM (AMERICAS) INC.$270 k
HUGHESARKLAND PRODUCING CO., INC.$262 k
SUNDAY, VERNA M.BHP PETROLEUM (AMERICAS) INC.$255 k
NUNN, ELIZABETH C. -C-SAHARA OPERATING COMPANY$252 k
COX, J. H.BHP PETROLEUM (AMERICAS) INC.$251 k
CAUBLE, D.J.PARKER & PARSLEY DEVELOPMENT L.P$250 k
CAUBLE, DOUGLASBRIGHT & CO.$241 k
PROCTOR -28-STEPHENS, AUTRY C.$226 k
ATKINSON, W. B. "B"PARKER & PARSLEY DEVELOPMENT L.P$224 k
MONKSTEPHENS, AUTRY C.$222 k
COX, C. J.STEPHENS, AUTRY C.$219 k
NUNNSTEPHENS, AUTRY C.$218 k
BRADEN, HARVEYHENRY PETROLEUM CORP.$218 k
HANSONSTEPHENS, AUTRY C.$216 k
TIPPETT "33"COX, JOHN L.$215 k
COOK, THOMAS E.BHP PETROLEUM (AMERICAS) INC.$207 k
REYNOLDS, C. C.STEPHENS, AUTRY C.$206 k
WELLS, ONAHALLWOOD ENERGY CORPORATION$206 k
LINDLEY-BD-STEPHENS, AUTRY C.$204 k
REYNOLDS, C. C.PARKER & PARSLEY DEVELOPMENT L.P$201 k
COOK, THOMAS E. "A"BHP PETROLEUM (AMERICAS) INC.$200 k
BRYANS, M.V. "B"PARKER & PARSLEY DEVELOPMENT L.P$198 k
MOELLER, FRANCISHANLEY PETROLEUM INC.$198 k
TXL "D"STEPHENS, AUTRY C.$192 k
MERCHANT -11-KIRKPATRICK OIL COMPANY$186 k
PROCTOR, LEONARD "A"ENERGEN RESOURCES CORPORATION$184 k
KNOLLE, OLGASAHARA OPERATING COMPANY$183 k
ATKINSON, W. B. "A"PARKER & PARSLEY DEVELOPMENT L.P$182 k
MCDANIELPED OIL CORPORATION$179 k
MCMASTER, MYRTLEBHP PETROLEUM (AMERICAS) INC.$176 k
CAUBLE, E. G. -K-PARKER & PARSLEY DEVELOPMENT L.P$176 k
ALDWELLHANLEY PETROLEUM INC.$172 k
DAVENPORT, R. S. -A-PARKER & PARSLEY DEVELOPMENT L.P$171 k
HARRELL, T. B.RASMUSSEN, TOM$168 k
MERCHANT, C. W.KIRKPATRICK OIL COMPANY$165 k
STEVENSON, J. ESTATERAPTOR RESOURCES, INC.$164 k
MERCHANT -10-KIRKPATRICK OIL COMPANY$164 k
MERCHANT, C. W. -C-SAHARA OPERATING COMPANY$162 k
EDWARDS, HOPEBHP PETROLEUM (AMERICAS) INC.$157 k
SCHROCK "23"STEPHENS, AUTRY C.$156 k
MERCHANT ESTATESTEPHENS, AUTRY C.$156 k
JALONICK, LOTTIE -A-STEPHENS, AUTRY C.$156 k
RICKER, RUPERT P., -J-BHP PETROLEUM (AMERICAS) INC.$154 k
BIRD, F.A. ESTATE "D"BIRD, CHARLES A.$153 k
BOYD "A"KIRKPATRICK OIL COMPANY$149 k
CALVIN DEAN UNITMIDPAR L.P.$148 k
HOWARD, WILLIAM 42WESTLAND OIL DEVELOPMENT CORP.$147 k
CHASE, MARY H.STEPHENS, AUTRY C.$145 k
TRIGG, KATHERINESTEPHENS, AUTRY C.$144 k
MERCHANT, C. W. -A-SAHARA OPERATING COMPANY$144 k
REYNOLDSROBERTS & HAMMACK, INC.$143 k
SUGG -F-STEPHENS, AUTRY C.$138 k
WILLIAMS, E. P.PARKER & PARSLEY DEVELOPMENT L.P$137 k
ROACHSTEPHENS, AUTRY C.$136 k
BRADEN, DAVIDPARKER & PARSLEY DEVELOPMENT L.P$131 k
CAUBLE, E. G., -A-STEPHENS, AUTRY C.$126 k
DOUGLAS, N. L. -28-KIRKPATRICK OIL COMPANY$125 k
REYNOLDS-GAMBILL -A-STEPHENS, AUTRY C.$124 k
BRYANS, M. V. "C"PARKER & PARSLEY DEVELOPMENT L.P$123 k
NUNN, J. F. "B"SAHARA OPERATING COMPANY$122 k
STANDLINDBC OPERATING, INC.$121 k
BRADEN, ERNESTPARKER & PARSLEY DEVELOPMENT L.P$120 k
SUGGBRISTOL RESOURCES CORPORATION$118 k
MALONE -44-KIRKPATRICK OIL COMPANY$115 k
WHITEHOUSE HEIRSPARKER & PARSLEY DEVELOPMENT L.P$114 k
COOK, T. E.HALLWOOD PETROLEUM, INC.$114 k
MCMASTERCOX, JOHN L.$114 k
BIGBY, J. A. -A-CITATION OIL & GAS CORP.$114 k
COX, X. B. "A"PARKER & PARSLEY DEVELOPMENT L.P$113 k
T. X. L. "B"HANLEY PETROLEUM INC.$112 k
CAUBLE, E. G.REMUDA OPERATING COMPANY$103 k
DOUGLAS, N. L.ARCH PETROLEUM INC.$101 k
NEELY, VERA B.CITATION OIL & GAS CORP.$101 k
CLARKSON RANCHSTEPHENS, AUTRY C.$101 k
SUGG, C. H. -B-BLACK RESOURCES, INC.$100 k
COX, X.B. "C"PARKER & PARSLEY DEVELOPMENT L.P$99 k
BIGBY, J. O. "10"STEPHENS, AUTRY C.$98 k
HOWARD, WM.ODESSA EXPLORATION, INC.$98 k
NUNN "A"KIRKPATRICK OIL COMPANY$98 k
MOELLER, E.PARKER & PARSLEY DEVELOPMENT L.P$97 k
COUEY, M. L.ODESSA EXPLORATION, INC.$97 k
FOUCHSTEPHENS, AUTRY C.$96 k
COOK, P. W.KIRKPATRICK OIL COMPANY$96 k
ATKINSON, W. B. -C-PARKER & PARSLEY DEVELOPMENT L.P$96 k
BRYANS "8"ODESSA EXPLORATION, INC.$95 k
HABYSTEPHENS, AUTRY C.$94 k
MCMASTERS, MYRTLEHALLWOOD ENERGY CORPORATION$94 k
SUGGLADD OPERATING COMPANY$94 k
BRADENMCENA INC.$94 k
MALONE, CYNTHIA -B-SAHARA OPERATING COMPANY$94 k
GIDNEY, J. W.MCMURREY, R. J., PRODUCTION COMP$93 k
CAUBLE, E. G. -H-STEPHENS, AUTRY C.$93 k
COX, CHARLES J. -A-CODA ENERGY, INC.$92 k
DOUGLAS -27A-KIRKPATRICK OIL COMPANY$90 k
HUNT -I-STEPHENS, AUTRY C.$90 k
BIGBY 17ODESSA EXPLORATION, INC.$90 k
COVEY, M. L.GLOSSOP, ROBERT L.$89 k
DOUGLASTAMARACK PETROLEUM COMPANY, INC.$89 k
RODA "A"STEPHENS, AUTRY C.$89 k
LANE "A"HALLWOOD PETROLEUM, INC.$88 k
TXL -D-CITATION OIL & GAS CORP.$88 k
MALONE -43-KIRKPATRICK OIL COMPANY$87 k
HUNT-F-STEPHENS, AUTRY C.$86 k
SMITH "A"PARKER & PARSLEY DEVELOPMENT L.P$86 k
HOWARD, WM. 31ODESSA EXPLORATION, INC.$84 k
VENABLE -12-SHACKELFORD,FRANK OIL PROPERTIES$84 k
BOYD, W. E., ET ALARCH PETROLEUM INC.$83 k
HUNT -K-STEPHENS, AUTRY C.$82 k
RICKER, RUPERT P., -H-BHP PETROLEUM (AMERICAS) INC.$81 k
ELKIN "29"MCENA INC.$81 k
PROCTOR "B"PARKER & PARSLEY DEVELOPMENT L.P$81 k
ARNOLDPARKER & PARSLEY DEVELOPMENT L.P$80 k
RICKER -F-2-STEPHENS, AUTRY C.$80 k
RICKER, RUPERT P., -D-BHP PETROLEUM (AMERICAS) INC.$80 k
BRADEN "A"HENRY PETROLEUM CORP.$79 k
CAUBLE, E. G. -L-PARKER & PARSLEY DEVELOPMENT L.P$79 k
REYNOLDS "21"ODESSA EXPLORATION, INC.$79 k
GIDNEY, E.B.ODESSA EXPLORATION, INC.$77 k
RICKER, RUPERT P., G.BHP PETROLEUM (AMERICAS) INC.$77 k
CB 104TEXAS ENERGY TRUST COMPANY$77 k
BRADENODESSA EXPLORATION, INC.$76 k
TXL -J-PARKER & PARSLEY DEVELOPMENT L.P$75 k
NUNN, ELIZABETHSTEPHENS, AUTRY C.$74 k
MERCHANT, C. W. -B-SAHARA OPERATING COMPANY$74 k
NALLEY, COY O.BHP PETROLEUM (AMERICAS) INC.$74 k
WEDDELL, SADIE ESTATEWESTAR ENERGY, INC.$73 k
JO ANNENERGEN RESOURCES CORPORATION$73 k
CALVERLEY, N. R. "B"STEPHENS, AUTRY C.$73 k
CALVEALEY, N. R. -A-STEPHENS, AUTRY C.$73 k
HAM, C. E.WESTAR ENERGY, INC.$72 k
BOYD -32-TAMARACK PETROLEUM COMPANY, INC.$72 k
NUNN -C-GLOSSOP, ROBERT L.$70 k
PETTIT, J. B.APACHE ENERGY RESOURCES CORP.$70 k
LEONA "166"MCENA INC.$70 k
ELKINS, F. F.ROBERTS & HAMMACK, INC.$70 k
WEDDELL- HABY - A-JJ OIL & GAS$70 k
RICKER, RUPERT P., -Q-BHP PETROLEUM (AMERICAS) INC.$69 k
GRAHAMSTEPHENS, AUTRY C.$69 k
ELKINROBERTS & HAMMACK, INC.$69 k
BOOKSTEPHENS, AUTRY C.$68 k
PEARCECROWNQUEST OPERATING, LLC$68 k
MALONE-DANIELROBERTS & HAMMACK, INC.$68 k
BOYLESCHAPARRAL ENERGY, L.L.C.$68 k
CAUBLE, E. G., -D-STEPHENS, AUTRY C.$67 k
HAM -B-JJ OIL & GAS$67 k
PATTERSON -E-STEPHENS, AUTRY C.$67 k
ROSENBAUMPARKER & PARSLEY DEVELOPMENT L.P$67 k
RICKER, RUPERT P. "P"BHP PETROLEUM (AMERICAS) INC.$67 k
RICKER, RUPERT P.BHP PETROLEUM (AMERICAS) INC.$67 k
COX 18ODESSA EXPLORATION, INC.$66 k
NUNN -B-GLOSSOP, ROBERT L.$66 k
BIGBY, W.A. "A"PARKER & PARSLEY DEVELOPMENT L.P$66 k
DAVENPORT, R. S.STEPHENS, AUTRY C.$65 k
PRIDDY, J. F.SAHARA OPERATING COMPANY$65 k
SNOWDENTAMARACK PETROLEUM COMPANY, INC.$64 k
KEHEWGLOSSOP, ROBERT L.$64 k
MILLER-MILNER UNITWALSH & WATTS, INC.$64 k
SUNDAY, VERNAHALLWOOD ENERGY CORPORATION$63 k
DOUGLAS -34-KIRKPATRICK OIL COMPANY$62 k
COUEYPARKER & PARSLEY DEVELOPMENT L.P$62 k
HOWARD, WM.ROBERTS & HAMMACK, INC.$62 k
CABOTHOLLIDAY DRILLING, INC.$62 k
RICKER, RUPERT P., -B-BHP PETROLEUM (AMERICAS) INC.$61 k
HOWARD, WILLIAM 31WESTLAND OIL DEVELOPMENT CORP.$61 k
KERR -4-KIRKPATRICK OIL COMPANY$60 k
SUGG -A-STEPHENS, AUTRY C.$60 k
NALLEYSTEPHENS, AUTRY C.$60 k
RICKER -B-STEPHENS, AUTRY C.$60 k
MERCHANTTAMARACK PETROLEUM COMPANY, INC.$59 k
GREER -20-KIRKPATRICK OIL COMPANY$59 k
AKIN, LILLARAPTOR RESOURCES, INC.$59 k
COUEY, M. L. -A-CITATION OIL & GAS CORP.$59 k
WELLS, ONA -B-ARCH PETROLEUM INC.$59 k
SCHWERTNER, FRANKPARKER & PARSLEY DEVELOPMENT L.P$59 k
MERCHANT 10PIONEER NATURAL RES. USA, INC.$59 k
RK EL PASOENERGEN RESOURCES CORPORATION$58 k
BOYD -7-KIRKPATRICK OIL COMPANY$58 k
NUNN, ELIZABETH C. -D-SAHARA OPERATING COMPANY$58 k
MALONE, CYNTHIA "10"PERMIAN RESOURCES, INC.$57 k
COUEY, M. L. -B-CITATION OIL & GAS CORP.$57 k
SUGGDISCOVERY OPERATING, INC.$56 k
SUGG "A"DISCOVERY OPERATING, INC.$56 k

Field number 14937333, from the Railroad Commission's field register. The register's own index resolves 498 leases and 1,074 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.