root / projects / DailyProductionReport_1.0 / XML / Version1.0 / WITSML131 / cs_wellDatum.xsd @ 16

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1<?xml version="1.0" encoding="UTF-8"?>
2<xsd:schema
3        elementFormDefault="qualified"
4        attributeFormDefault="unqualified"
5        targetNamespace="http://www.witsml.org/schemas/131"
6        xmlns:witsml="http://www.witsml.org/schemas/131"
7        xmlns:xsd="http://www.w3.org/2001/XMLSchema"
8        version="1.3.1">
9        <!--                                                     -->
10        <!--POSC License Agreement
11        This file is distributed under the POSC License Agreement at
12        http://www.posc.org/about/license.shtml.
13        Use of this file constitutes agreement with the POSC License Agreement.
14        -->
15        <!--                                                     -->
16        <xsd:include schemaLocation="typ_dataTypes.xsd"/>
17        <xsd:include schemaLocation="cs_refWellWellbore.xsd"/>
18        <xsd:include schemaLocation="cs_refWellWellboreRig.xsd"/>
19        <xsd:include schemaLocation="attgrp_uid.xsd"/>
20        <!--                                                     -->
21        <xsd:complexType name="cs_wellDatum">
22                <xsd:annotation>
23                        <xsd:documentation>Defines the datums associated with elevation, vertical depth
24                        and measured depth coordinates within the context of a well. </xsd:documentation>
25                </xsd:annotation>
26                <xsd:sequence>
27                        <xsd:element name="name" type="witsml:nameString" minOccurs="0" maxOccurs="1">
28                                <xsd:annotation>
29                                        <xsd:documentation>The human understandable contextual name of the reference datum.</xsd:documentation>
30                                </xsd:annotation>
31                        </xsd:element>
32                        <xsd:element name="code" type="witsml:ElevCodeEnum" minOccurs="0" maxOccurs="1">
33                                <xsd:annotation>
34                                        <xsd:documentation>The code value that represents the type of reference datum.
35                                        This may represent a point on a device (e.g., kelly bushing) or it may represent
36                                        a vertical reference datum (e.g., mean sea level).</xsd:documentation>
37                                </xsd:annotation>
38                        </xsd:element>
39                        <xsd:element name="datumName" type="witsml:wellKnownNameStruct" minOccurs="0" maxOccurs="1">
40                                <xsd:annotation>
41                                        <xsd:documentation>The name of the vertical reference datum in a particular naming system.
42                                        This should only be specified if the above 'code' represents some variation of sea level.
43                                        An optional short name (code) can also be specified. Specifying a well known datum is highly desired
44                                        if the above code is a variant of sea level because sea level varies over time and space.
45                                        An example would be to specify a name of 'Caspian Sea' with a code of '5106' in
46                                        the 'EPSG' naming system.</xsd:documentation>
47                                </xsd:annotation>
48                        </xsd:element>
49                        <xsd:element name="kind" type="witsml:kindString" minOccurs="0" maxOccurs="unbounded">
50                                <xsd:annotation>
51                                        <xsd:documentation>Since various activities may use different points as
52                                        measurement datums, it is useful to characterize the point based on its usage.
53                                        A well reference datum may have more than one such characterization.
54                                        For example, it may be the datum used by the driller and logger for measuring
55                                        their depths. Example usage values would be 'permanent','driller', 'logger'
56                                        'WRP' (well reference point) and 'SRP' (site reference point).</xsd:documentation>
57                                </xsd:annotation>
58                        </xsd:element>
59                        <xsd:element name="wellbore" type="witsml:cs_refWellWellbore" minOccurs="0" maxOccurs="1">
60                                <xsd:annotation>
61                                        <xsd:documentation>A pointer to the wellbore that contains the reference datum.
62                                        This should be specified if a measured depth is given.</xsd:documentation>
63                                </xsd:annotation>
64                        </xsd:element>
65                        <xsd:element name="rig" type="witsml:cs_refWellWellboreRig" minOccurs="0" maxOccurs="1">
66                                <xsd:annotation>
67                                        <xsd:documentation>A pointer to the rig that contains the device used
68                                        as a reference datum. The rig may be associated with a wellbore in another well
69                                        (e.g., pattern drilling using a rig on a track).</xsd:documentation>
70                                </xsd:annotation>
71                        </xsd:element>
72                        <xsd:element name="elevation" type="witsml:wellElevationCoord" minOccurs="0" maxOccurs="1">
73                                <xsd:annotation>
74                                        <xsd:documentation>The gravity based elevation coordinate of this reference datum
75                                        as measured from another datum. Positive moving upward from the elevation datum.
76                                        An elevation should be given unless this is a vertical reference datum (e.g., sea level). </xsd:documentation>
77                                </xsd:annotation>
78                        </xsd:element>
79                        <xsd:element name="measuredDepth" type="witsml:measuredDepthCoord" minOccurs="0" maxOccurs="1">
80                                <xsd:annotation>
81                                        <xsd:documentation>The measured depth coordinate of this reference datum
82                                        as measured from another datum. The measured depth datum should either be the same as
83                                        the elevation datum or it should be relatable to the elevation datum through other datums.
84                                        Positive moving toward the bottomhole from the measured depth datum.
85                                        This should be given when a local reference is "downhole",
86                                        such as a kickoff point or ocean bottom template, and the borehole may not be vertical.
87                                        If a Depth is given then an Elevation should also be given.</xsd:documentation>
88                                </xsd:annotation>
89                        </xsd:element>
90                        <xsd:element name="comment" type="witsml:commentString" minOccurs="0" maxOccurs="1">
91                                <xsd:annotation>
92                                        <xsd:documentation>A contextual description of the well reference datum.</xsd:documentation>
93                                </xsd:annotation>
94                        </xsd:element>
95                </xsd:sequence>
96                <xsd:attribute name="defaultMeasuredDepth" type="witsml:logicalBoolean" use="optional">
97                        <xsd:annotation>
98                                <xsd:documentation>True indicates that this is the default reference datum
99                                for measured depth coordinates.
100                                False or not given indicates that this is not the default reference datum.
101                                Measured depth coordinates that do not specify a datum reference should be
102                                assumed to be measured relative to this default reference datum.
103                                Only one reference datum may be designated as the default measured depth datum for each well.
104                                Values are "true" (or "1") and "false" ( or "0").</xsd:documentation>
105                        </xsd:annotation>
106                </xsd:attribute>
107                <xsd:attribute name="defaultVerticalDepth" type="witsml:logicalBoolean" use="optional">
108                        <xsd:annotation>
109                                <xsd:documentation>True indicates that this is the default reference datum
110                                for vertical depth coordinates.
111                                False or not given indicates that this is not the default reference datum.
112                                Vertical depth coordinates that do not specify a datum reference should be
113                                assumed to be measured relative to the default reference datum.
114                                Only one reference datum may be designated as the default vertical depth datum for each well.
115                                Values are "true" (or "1") and "false" ( or "0").</xsd:documentation>
116                        </xsd:annotation>
117                </xsd:attribute>
118                <xsd:attribute name="defaultElevation" type="witsml:logicalBoolean" use="optional">
119                        <xsd:annotation>
120                                <xsd:documentation>True indicates that this is the default reference datum
121                                for elevation coordinates. 
122                                False or not given indicates that this is not the default reference datum.
123                                Elevation coordinates that do not specify a datum reference should be assumed to be
124                                measured relative to the default reference datum.
125                                Only one reference datum may be designated as the default elevation datum for each well.
126                                Values are "true" (or "1") and "false" ( or "0").</xsd:documentation>
127                        </xsd:annotation>
128                </xsd:attribute>
129                <xsd:attributeGroup ref="witsml:attgrp_uid">
130                        <xsd:annotation>
131                                <xsd:documentation>The unique identifier of the reference datum.</xsd:documentation>
132                        </xsd:annotation>
133                </xsd:attributeGroup>
134        </xsd:complexType>
135        <!--                                                     -->
136</xsd:schema>
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