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Readme File For Digital Maps

Digital maps are presented as digital well locations listed in a database as latitude and longitude, and as digital maps in PDF format.

Digital Well Locations

Digital well locations are available in a database file that contains the latitude and longitude for each well in the state. These database files can be downloaded as a statewide file (with approximately 195,000 wells listed) or by district office (see the map index).

Each database file is a compressed EXE file that can be download (saved) to your computer. To use the database file after you have saved it to your computer, it must be uncompressed (by double clicking on it or use Start, Run process).

The compressed file will extract into a DBF file that can be imported into your mapping software. Mapping software used by the Division to prepare maps is MapInfo, but other mapping software should be able to import the DBF files. The information contained in the file includes API number; operator; well name and number; section, township, and range; and the latitude and longitude (the map projection used is Latitude/Longitude-NAD27 for the Continental United States).

Digital Maps can be found by Division district office and by map number. These maps are prepared using digital well locations and digital base-map data. The files are in PDF format and Acrobat Reader software is needed to view them.

Well status codes contained within the database files are as follows:

NOTE: Adding 1 to any status code number indicates that the well was directionally drilled. For example, adding 1 to 008 makes 009, a directionally drilled producing oil well. (In fact, all odd numbers are wells directionally drilled.)

000 drilling
002 drilling-idle
004 buried-idle
006 plugged and abandoned dry hole
008 completed oil
010 idle oil
012 buried oil-idle
014 plugged and abandoned oil
016 completed gas
018 gas-open to oil zone
020 gas-idle
022 buried gas-idle
024 plugged and abandoned gas
026 dual oil and gas
028 plugged and abandoned oil and gas
030 completed gas storage-injection/withdrawal
032 plugged and abandoned gas storage
034 completed waterflood
036 oil converted to waterflood
038 dual completion-producing oil and waterflood
040 completed water disposal
042 water disposal-idle
044 oil well converted to water disposal
046 dual completion-producing oil and disposal
048 completed steamflood
050 completed fireflood
052 completed gas injection-previous gas well
054 completed gas injection-previous oil well
056 completed gas injection-previous dry hole
058 oil producing and gas injection
060 completed CO2
062 completed LPG injection
064 completed air injection
066 observation
068 completed water source
070 water source-idle
072 geothermal
074 suspected location
076 abandoned conductor
078 oil-converted to air storage
090 oil-converted to water disposal-abandoned
092 steamflood-abandoned
110 oil-converted to water disposal-idle
114 oil-converted to observation-idle
116 gas converted to water disposal
118 gas-converted to observation-idle
124 gas-converted to water disposal-abandoned
130 gas-converted to gas storage
134 dry hole-converted to water disposal-abandoned
136 oil-converted to waterflood-abandoned
140 water disposal-abandoned
148 oil-converted to steamflood-abandoned
150 oil-converted to fireflood-abandoned
168 oil-converted to water source-abandoned
170 oil-converted to water source
178-gas storage-converted from oil
200 oil tunnel
214 oil tunnel entrance
236 oil-converted to waterflood-idle
248 oil-converted to steamflood
250 abandoned dry hole-converted to fireflood
266 water source-abandoned
268 water disposal-converted to observation
336 LPG injection-abandoned
548 steamflood-idle
999 cancelled location

Some maps have symbols specific to certain operators or producing zones. The symbols may have triangles, diamonds, circles, or half-circles around them. In these instances, a letter will precede the status code number: “T” for triangle; “D” for diamond; and “C” for circle. Half-circles may be in any one of four positions indicated by the following: “A”, above; “B”, below; “L”, left side; and “R”, right side. An “S” indicates a seafloor completion.

GEOTHERMAL WELLS

G000 geothermal-location
G002 geothermal-drilled-idle
G006 geothermal-dry hole-plugged and abandoned
G008 geothermal-capable of production
G009 cold water well
G010 geothermal-capable of production-idle
G012 geothermal-production-idle
G014 geothermal-production-plugged and abandoned
G040 geothermal-injection
G042 geothermal-injection-idle
G044 geothermal-injection-converted from production
G066 geothermal-observation
G067 geothermal-observation-plugged and abandoned
G068 cold water observation
G069 geothermal-observation-converted from production
G070 cold water observation-plugged and abandoned
G071 geothermal-observation-converted from production-plugged and abandoned
G136 geothermal-injection-plugged and abandoned-converted from production
G140 geothermal-injection-plugged and abandoned
G212 geothermal-temperature gradient hole
G214 geothermal-temperature gradient hole-plugged and abandoned

The geothermal well databases contain the following information in the comments section. The first grouping of letters indicates the well status. The second grouping indicates the type of well and the third indicates whether the well records are confidential or not. Y indicates yes and N indicates no.

The coding for well status is as follows:
ACTV-active
ABDN-abandoned
UNKN-unknown
IDLE-idle
SUSP-suspended
PROP-proposed
LOST-lost
DEST-deserted

The coding for well type is as follows:
EST-exploratory steam
EWT-exploratory water
DST-developmental steam
DWT-developmental water
INJ-injection
TG-temperature gradient
OBS-observation
CLT-commercial low temperature
NLT-noncommercial low temperature
WW-water well

In the spud date column, where the month and date both equal 12, the year the well was spud is recorded but the day and month of the year are not in the database.
In the district column, 7 is Geothermal District G1, 8 is Geothermal District G2 and 9 is Geothermal District G3.

SOURCE CODES

These codes indicate the means by which the well location data was collected.
HUD - Heads up digitized (from scanned, georeferenced mylar map)
GPS - Collected via Global Positioning System
MIP - Location derived from MapInfo Plot of section corner calls
OPR - Data provided by operator

DISCLAIMER: The database information may change without notice. The Department of Conservation makes no warranties, whether expressed or implied, as to the suitability of the product for any particular purpose. Any use of this information is at the user’s own risk. For further information or to make suggestions about the maps, contact the Division of Oil, Gas, and Geothermal Resources, 801 K Street, MS 20-20, Sacramento, CA 95814-3530. Any problems, call Jennie Catalano at (916) 327-1042.