Each well in the WhiteStar database contains an API number as one of its attributes. If this number begins with a 4, then the number was assigned by the Railroad Commission. Otherwise it is a pseudo-unique number created by WhiteStar. The Railroad Commission has yet to assign numbers to these wells, which typically were drilled prior to 1977.

Well status codes are defined as follows:

AL - Abandoned Location

ALG - Abandoned Location, Permitted for Gas

ALO - Abandoned Location, Permitted for Oil

B - Both Oil and Gas Well

CT - Core Test

D - Dry Well

G - Gas Well

GS - Gas Storage Well

IW - Injection Well

IWB - Injection Well, Was Both Oil and Gas

IWG - Injection Well, was gas

IWO - Injection Well, was oil

L - Location

O - Oil Well

OS - Oil Storage Well

PB - Plugged Oil and Gas Well

PG - Plugged Gas Well

PO - Plugged Oil Well

RW - Radioactive Well

SL - Surface Location

ST - Sulfur Test Well

BW - Brine Well

WS - Water Supply

WSO - Water Supply (From Oil Well)

WSG - Water Supply (From Gas Well)

WSB - Water Supply (From well with both oil and gas)

OB - Observation Well

OBO - Observation Well (From Oil Well)

OBG - Observation Well (From Gas Well)

OBB - Observation Well (From both oil and gas)

STO - Storage Well