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Oil, Gas & Geothermal - Field Rules 

Field Rules

Pursuant to California Code of Regulations (CCR) Title 14, Division 2, Chapter 4, Section 1722 (k), the State Oil and Gas Supervisor may establish Field Rules for any oil and gas pool or zone in a field when sufficient geologic and engineering data is available from previous drilling operations. Field Rules supplement more broadly applicable statutory and regulatory requirements. Each Field Rule is specific to a field, and in many cases, specific to Areas and Zones or Pools within a field.

The Division has established Field Rules for those fields where geologic and engineering information is available to accurately describe subsurface conditions. These Field Rules identify downhole conditions and well construction information that oil and gas operators should consider when drilling and completing onshore oil and gas wells.

Existing Field Rules are continually reviewed and updated as ongoing field operations generate new technical information, including geologic data.

Division publication California Oil and Gas Field Rules (PRC05) contains these field rules and can be viewed and downloaded from this site (PDF, 260 pages, 12 MB).

  • To view and download an Excel file of the Field Rules Index, click here.

  • To inquire about Field Rules, contact the Division District office where the field is located. For a list of district offices, click here.

Index to Field Rules

(click on field name to view or download a PDF file of Field Rule for that field and pool/zone.)

A B C D E F G H  I J K L M N O P R S T U V W
Field Area Pool/Zone District Type
Afton Gas Main, Northwest All Productive zones 6

Drilling/Completion

Arbuckle Gas N/A Forbes 6

Drilling/Completion

Arroyo Grande Tiber Dollie 3

Drilling/Completion

Ash Slough Gas N/A Cretaceous / Moreno 5 Drilling/Completion
Barham Ranch All Sisquoc, Monterey 3 Drilling/Completion
Belridge, South N/A Antelope Shale 4 Drilling/Completion
Belridge, South N/A Etchegoin, Diatomite 4 Drilling/Completion
Belridge, South N/A Tulare 4 Drilling/Completion
Bounde Creek Gas N/A All Productive zones 6 Drilling/Completion
Brea-Olinda N/A First Miocene, Pliocene, Second Miocene, Third Miocene, Third Pliocene 1 Drilling/Completion
Brentwood East Gas N/A Third Massive 6 Drilling/Completion
Buckeye  Gas N/A Kione, Forbes 6 Drilling/Completion
Buena Vista Buena Vista Front Above Scalez (AS) 4 Drilling/Completion
Buena Vista Buena Vista Front Mulinia 4 Drilling/Completion
Buena Vista Buena Vista Front SubScalez One (SS1) 4 Drilling/Completion
Buena Vista Buena Vista Front SubScalez Two (SS2) 4 Drilling/Completion
Buena Vista Buena Vista Hills 99-9D 4 Drilling/Completion
Buena Vista Buena Vista Hills Antelope Shale 4 Drilling/Completion
Buena Vista Buena Vista Hills Calitroleum 4 Drilling/Completion
Buena Vista Buena Vista Hills Gusher 4 Drilling/Completion
Buena Vista Buena Vista Hills Mya (Gas) 4 Drilling/Completion
Buena Vista Buena Vista Hills Sub-Mulinia 4 Drilling/Completion
Buena Vista Buena Vista Hills Top Oil (Sub-Scalez) 4 Drilling/Completion
Buena Vista Buena Vista Hills Wilhelm 4 Drilling/Completion
Bunker Gas N/A All Productive Pools to Date 6 Drilling/Completion
Butte Sink Gas N/A All Productive Zones 6 Drilling/Completion
Butte Slough Gas N/A All Productive Zones 6 Drilling/Completion
Cache Creek Gas N/A Starkey, Winters 6 Drilling/Completion
Cache Slough Gas N/A All Productive Zones 6 Drilling/Completion
Canfield Ranch East Gosford Stevens 4 Drilling/Completion
Careaga Canyon San Antonio Monterey 5 Drilling/Completion
Cascade N/A All 2 Drilling/Completion
Cat Canyon Central All Sisqoc sands 5 Drilling/Completion
Cat Canyon East All Sisquoc zones including the Brooks sand 5 Drilling/Completion
Cat Canyon Sisquoc All Sisquoc sands EXCEPT the Thomas and S 17 sands 5 Drilling/Completion
Cat Canyon West Monterey 5 Drilling/Completion
Cat Canyon West All Sisquoc sands 5 Drilling/Completion
Clarksburg Gas N/A All Productive zones 6 Drilling/Completion
Coalinga N/A Etchegoin-Temblor 5 Drilling/Completion
Coalinga, East, Extension Coalinga Nose Miocene (Vaqueros), Eocene (Gatchell) 5 Drilling/Completion
Coalinga, East, Extension Northwest Eocene (Gatchell) 5 Drilling/Completion
Compton Landing  Gas N/A Kione, Forbes 6 Drilling/Completion
Conway Ranch Gas N/A All Productive Zones 6 Drilling/Completion
Corning South Gas N/A All Productive Zones 6 Drilling/Completion
Cuyama, South Main Dibblee, Colgrove 3 Drilling/Completion
Cuyama, South Main Santa Margarita  3 Drilling/Completion
Cymric Sheep Springs Tulare 4 Drilling/Completion
Cymric Welport Etchegoin 4 Drilling/Completion
Cymric Welport Olig (Reef Ridge) 4 Drilling/Completion
Cymric Welport Tulare (Amnicola) 4 Drilling/Completion
Davis Southeast Gas N/A All Productive Zones 6 Drilling/Completion
Denverton Creek Gas N/A All Productive Pools to Date 6 Drilling/Completion
Davis Southeast Gas N/A All Productive Zones 6 Drilling/Completion
Dixon East Gas All All Productive Zones 6 Drilling/Completion
Dry Slough Gas East, West Winters 6 Drilling/Completion
Dunnigan Hills Gas All All Productive Pools to Date 6 Drilling/Completion
Durham Gas N/A All Productive Zones 6 Drilling/Completion
Dutch Slough Gas N/A All Productive Pools to Date 6 Drilling/Completion
East Islands Gas N/A Meganos Canyon, Mokelumne River 6 Drilling/Completion
Edison  Main Freeman-Jewett 4 Drilling/Completion
Edison  Main Kern River-Chanac 4 Drilling/Completion
Edison  Main Nozu 4 Drilling/Completion
Edison  Main Santa Margarita 4 Drilling/Completion
Edison  Main Wicker 4 Drilling/Completion
Edison  Racetrack Hill Kern River-Chanac 4 Drilling/Completion
Edison  West Nozu 4 Drilling/Completion
Eldorado Bend Gas N/A Starkey, Winters 6 Drilling/Completion
Elk Hills N/A Mya (Gas) 4 Drilling/Completion
Elk Hills N/A Shallow Oil Zone (SOZ) 4 Drilling/Completion
Elk Hills N/A Stevens and Northwest Stevens 4 Drilling/Completion
Elkhorn Slough Gas N/A Winters 6 Drilling/Completion
Everglade Gas N/A Forbes 6 Drilling/Completion
French Camp Gas N/A All Productive Pools to Date 6 Drilling/Completion
Fruitvale Calloway 40-7 4 Drilling/Completion
Fruitvale Calloway 42-0 4 Drilling/Completion
Fruitvale Greenacres Chanac 4 Drilling/Completion
Fruitvale Greenacres Lerdo 4 Drilling/Completion
Fruitvale Main Fairhaven 4 Drilling/Completion
Fruitvale Main Kernco 4 Drilling/Completion
Fruitvale Main Martin 4 Drilling/Completion
Fruitvale Main Mason-Parker 4 Drilling/Completion
Fruitvale Main Santa Margarita 4 Drilling/Completion
Gill Ranch Gas N/A Eocene, Cretaceous 5 Drilling/Completion
Grand Island Gas N/A All Productive Zones 6 Drilling/Completion
Greenwood Gas N/A Eocene, Forbes 6 Drilling/Completion
Greenwood, South, Gas N/A Eocene, Kione, Forbes 6 Drilling/Completion
Grimes Gas N/A Kione, Forbes 6 Drilling/Completion
Grimes, West, Gas N/A Kione, Forbes 6 Drilling/Completion
Grizzly Bluff Gas N/A Rio Dell 6 Drilling/Completion
Guijarral Hills All Miocene (Sanger, Leda), Eocene (Gatchell or Bourdieu) 5 Drilling/Completion
Hasley Canyon N/A All 2 Drilling/Completion
Helm N/A Miocene (Zilch), Cretaceous 5 Drilling/Completion
Howells Point Gas N/A All Productive Zones 6 Drilling/Completion
Inglewood Any Area-East of
Newport-Inglewood Fault		 Bradna, City of Inglewood, Nodular Shale and Sentous 1 Drilling/Completion
Inglewood Any Area-East of
Newport-Inglewood Fault		 Investment, Vickers-Machado, Rindge, Rubel, Moynier 1 Drilling/Completion
Inglewood Any Area-West of
Newport-Inglewood Fault		 Bradna, City of Inglewood, Nodular Shale and Sentous 1 Drilling/Completion
Inglewood Any Area-West of
Newport-Inglewood Fault		 Investment, Vickers-Machado, Rindge, Rubel, Moynier 1 Drilling/Completion
Jacalitos N/A Temblor 5 Drilling/Completion
Karnak Gas N/A Starkey, Winters 6 Drilling/Completion
Kern River N/A Kern River 4 Drilling/Completion
Kettleman Middle Dome N/A Miocene (Temblor), Eocene (Kreyenhagen, McAdams) 5 Drilling/Completion
Kettleman North Dome N/A Miocene (Temblor Zones I,II,III,IV,V, Felix silt,Burbank,Whepley & Vaqueros), Eocene (Keyenhagen, Upper & Lower McAdams) 5 Drilling/Completion
King Island Gas N/A Mokelumne River 6 Drilling/Completion
Kirby Hill Gas N/A Markley, Mortonville, Domengine, Wagenet 6 Drilling/Completion
Kirk Gas N/A Forbes 6 Drilling/Completion
Kirkwood Gas N/A All Productive Pools to Date 6 Drilling/Completion

Knights Landing Gas

Grays Bend Winters 6 Drilling/Completion

Knights Landing Gas

N/A Mokelumne River, Hamilton, Starkey, Winters 6 Drilling/Completion
Kreyenhagen N/A Miocene (Temblor, Reef Ridge) 5 Drilling/Completion

La Goleta Gas

N/A Sespe 3 Drilling/Completion

La Honda

 Main, South All Productive Zones 6 Drilling/Completion
Lathrop Gas N/A Azevedo, Tracy, Lathrop 6 Drilling/Completion
Lindsey Slough Gas N/A All Productive Pools to Date 6 Drilling/Completion
Little Butte Gas N/A All Productive Zones 6 Drilling/Completion
Livermore N/A All Productive Zones 6 Drilling/Completion
Lodi Gas N/A All Productive Zones 6 Drilling/Completion

Lone Star Gas

N/A Forbes 6 Drilling/Completion
Los Medanos Gas Main, Northeast All Productive Zones 6 Drilling/Completion
Lost Hills N/A Cahn (Fractured Chert/Antelope Shale) 4 Drilling/Completion
Lost Hills N/A Etchegoin 4 Drilling/Completion
Lost Hills N/A Reef Ridge 4 Drilling/Completion
Lost Hills N/A Tulare 4 Drilling/Completion
Lynch Canyon N/A Monterey / Lanigan Sand 3 Drilling/Completion
Maine Prairie Gas N/A All Productive Pools to Date 6 Drilling/Completion
Malton-Black Butte Gas N/A Eocene, Kione, Forbes 6 Drilling/Completion
McCool Ranch N/A Monterey Formation, "E" Sands, Lombardi 3 Drilling/Completion
McDonald Island Gas N/A McDonald Island 6 Drilling/Completion
McMullin Ranch Gas N/A Blewett 5 & Tracy, E Zone 6 Drilling/Completion
Medora Lake Gas N/A All Productive Zones 6 Drilling/Completion
Merrill Avenue Gas N/A Late Cretaceous / Moreno 5 Drilling/Completion
Merritt Gas N/A All Productive Zones 6 Drilling/Completion
Midway Sunset N/A Lakeview, Sub-Lakeview, Potter, Marvic, Antelope Shale 4 Drilling/Completion
Midway Sunset N/A Monarch (Spellacy), Webster, Moco, Obispo, Pacific, Leutholtz (Metson), Republic 4 Drilling/Completion
Midway Sunset N/A Tulare, Mya Tar Sands, Top Oil, Kinsey, Wilhelm, Gusher, Calitroleum 4 Drilling/Completion
Millar Gas Main, West All Productive Pools to Date 6 Drilling/Completion
Moffatt Ranch Gas N/A Eocene, Cretaceous 5 Drilling/Completion
Monroe Swell Northwest All 3 Drilling/Completion
Montalvo, West All All 2 Drilling/Completion
Montebello Main 1st, 2nd, 3rd & 4th zones 1 Drilling/Completion
Moon Bend Gas N/A Kione, Forbes 6 Drilling/Completion
Mountain View Arvin Chanac 4 Drilling/Completion
Mountain View Arvin Santa Margarita 4 Drilling/Completion
Mountain View Arvin Schist 4 Drilling/Completion
Mountain View Digiorgio Santa Margarita 4 Drilling/Completion
Mountain View Digiorgio Schist 4 Drilling/Completion
Mountain View Main Hood (Basal Chanac) 4 Drilling/Completion
Mountain View Main Wharton (Hogan) 4 Drilling/Completion
Mountain View Vacarro Cattani 4 Drilling/Completion
Mountain View Vacarro Chanac 4 Drilling/Completion
Mountain View Vacarro Derby 4 Drilling/Completion
Mountain View Vacarro Houchin 4 Drilling/Completion
Mountain View West Arvin Cattani 4 Drilling/Completion
Mountain View West Arvin Chanac-Cattani 4 Drilling/Completion
Newhall-Potrero N/A All 2 Drilling/Completion
Newport, West Onshore "A" and "B" 1 Drilling/Completion
Newport, West Onshore "C" 1 Drilling/Completion
Newport, West Onshore "D", "E" and "F" 1 Drilling/Completion
Oak Park N/A Sespe 2 Drilling/Completion
Oakley South Gas N/A Third Massive 6 Drilling/Completion
Oat Mountain N/A All 2 Drilling/Completion
Oil Creek N/A All Productive Zones 6 Drilling/Completion
Ojai All All 2 Drilling/Completion
Orcutt Main Sisquoc - Diatomite 3 Drilling/Completion
Ord Bend Gas N/A All Productive Pools to Date 6 Drilling/Completion