<xs:simpleType name="WellStatus">
  <xs:annotation>
    <xs:documentation>These values represent the status of a well or wellbore.</xs:documentation>
  </xs:annotation>
  <xs:restriction base="eml:TypeEnum">
    <xs:enumeration value="abandoned">
      <xs:annotation>
        <xs:documentation>The status of a facility in which drilling, completion, and production operations have been permanently terminated.</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="active">
      <xs:annotation>
        <xs:documentation>For a well to be active, at least one of its wellbores must be active. For a wellbore to be active, at least one of its completions must be actively producing or injecting fluids.</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="active -- injecting">
      <xs:annotation>
        <xs:documentation>Fluids are actively being injected into the facility.</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="active -- producing">
      <xs:annotation>
        <xs:documentation>Fluids are actively being produced from the facility.</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="completed">
      <xs:annotation>
        <xs:documentation>The completion has been installed, but the facility is not yet active. This status is appropriate only before the initial producing or injecting activity.</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="drilling">
      <xs:annotation>
        <xs:documentation>The status of a well or wellbore in which drilling operations have begun, but are not yet completed. The status ends when another status becomes appropriate.</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="partially plugged">
      <xs:annotation>
        <xs:documentation>The wellbore has been plugged from the bottom, but only partially to the point where it intersects another wellbore.</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="permitted">
      <xs:annotation>
        <xs:documentation>The facility has received regulatory approvel, but drilling has not yet commenced. For a well, it has been spudded. For a subsequent wellbore, the whipstock or similar device has not yet been set.</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="plugged and abandoned">
      <xs:annotation>
        <xs:documentation>An abandoned well (or wellbore) whose wellbores have been plugged in such a manner as to prevent the migration of oil, gas, salt water, or other substance from one stratum to another. Generally the criteria for this status is controlled by regulatory authorities.</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="proposed">
      <xs:annotation>
        <xs:documentation>The status of a well or wellbore from conception to either regulatory approval or commencement of drilling.</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="sold">
      <xs:annotation>
        <xs:documentation>The facility has been sold, so it is no longer appropriate to keep a close internal status value. Status values may be added at later times without changing the sold status.</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="suspended">
      <xs:annotation>
        <xs:documentation>Production or injection has been temporarily suspended in a manner that will allow immediate resumption of activities.</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="temporarily abandoned">
      <xs:annotation>
        <xs:documentation>Production or injection has been temporarily suspended in a manner that will not allow immediate resumption of activities.</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="testing">
      <xs:annotation>
        <xs:documentation>The facility operations are suspended while tests are being conducted to determine formation and/or reservoir properties. For example, a drillstem test. This status also includes extended testing.</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="tight">
      <xs:annotation>
        <xs:documentation>Information about the status of the well is confidential. This is more explicit than unknown, since it gives the reason that the status value is unknown.</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="working over">
      <xs:annotation>
        <xs:documentation>Maintenance or data acquisition on a well during the production phase. This includes any relevant job which can be done while the well is shut in. This includes many jobs that occur when a well is re-entered.</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="unknown">
      <xs:annotation>
        <xs:documentation>The value is not known. This value should not be used in normal situations. All reasonable attempts should be made to determine the appropriate value. Use of this value may result in rejection in some situations.</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
  </xs:restriction>
</xs:simpleType>