-<xsd:schema elementFormDefault="qualified" attributeFormDefault="unqualified" targetNamespace="http://www.witsml.org/schemas/1series" version="1.4.1.1">

-<!--

-->

-<!--

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	This file is distributed under the Energistics License Agreement at
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	Use of this file constitutes agreement with the Energistics License Agreement.
	Copyright (c) 2012 Energistics. All rights reserved.
	Energistics, WITSML, PRODML and RESQML are trademarks or registered trademarks of Energistics.

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<xsd:include schemaLocation="cs_stnTrajRawData.xsd"/>

<xsd:include schemaLocation="cs_stnTrajCorUsed.xsd"/>

<xsd:include schemaLocation="cs_stnTrajValid.xsd"/>

<xsd:include schemaLocation="cs_stnTrajMatrixCov.xsd"/>

<xsd:include schemaLocation="cs_location.xsd"/>

<xsd:include schemaLocation="cs_refWellboreTrajectoryStation.xsd"/>

<xsd:include schemaLocation="cs_extensionNameValue.xsd"/>

<xsd:include schemaLocation="cs_commonData.xsd"/>

<xsd:include schemaLocation="attgrp_uid.xsd"/>

-<!--

-->

-<xsd:complexType name="cs_trajectoryStation">

-<xsd:annotation>

<xsd:documentation>WITSML - Trajectory Station Component Schema</xsd:documentation>

<xsd:appinfo>Modified-in-version=1.4.1, By-issue=W-CR-017.30, Change=Renamed-from:grp_trajectoryStation</xsd:appinfo>

<xsd:appinfo>Modified-in-version=1.4.1, By-issue=W-CR-008, Change=Deleted-element:modelToolError</xsd:appinfo>

</xsd:annotation>

-<xsd:sequence>

-<xsd:element name="target" type="witsml:refNameString" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>A pointer to the intended target of this station. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="dTimStn" type="witsml:timestamp" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Date and time the station was measured or created. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="typeTrajStation" type="witsml:TrajStationType" minOccurs="1" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Type of survey station. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="typeSurveyTool" type="witsml:TypeSurveyTool" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>The type of tool used for the measurements.</xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="calcAlgorithm" type="witsml:TrajStnCalcAlgorithm" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>The type of algorithm used in the position calculation.</xsd:documentation>

<xsd:appinfo>Modified-in-version=1.4.0, By-issue=1.3.1-109, Change=Added</xsd:appinfo>

</xsd:annotation>

</xsd:element>

-<xsd:element name="md" type="witsml:measuredDepthCoord" minOccurs="1" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Measured depth of measurement from the drill datum. This is an API "node-index" query parameter for growing objects. See the relevant API specification for the query behavior related to this element.</xsd:documentation>

<xsd:appinfo>Modified-in-version=1.4.1, By-issue=42, Change=Modified-description</xsd:appinfo>

</xsd:annotation>

</xsd:element>

-<xsd:element name="tvd" type="witsml:wellVerticalDepthCoord" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Vertical depth of the measurements. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="incl" type="witsml:planeAngleMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Hole inclination, measured from vertical. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="azi" type="witsml:planeAngleMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Hole azimuth. Corrected to wells azimuth reference. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="mtf" type="witsml:planeAngleMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Toolface angle (magnetic). </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="gtf" type="witsml:planeAngleMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Toolface angle (gravity). </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="dispNs" type="witsml:lengthMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>North-south offset, positive to the North. This is relative to wellLocation with a North axis orientation of aziRef. If a displacement with respect to a different point is desired then define a localCRS and specify local coordinates in location.</xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="dispEw" type="witsml:lengthMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>East-west offset, positive to the East. This is relative to wellLocation with a North axis orientation of aziRef. If a displacement with respect to a different point is desired then define a localCRS and specify local coordinates in location. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="vertSect" type="witsml:lengthMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Distance along vertical section azimuth plane. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="dls" type="witsml:anglePerLengthMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Dogleg severity. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="rateTurn" type="witsml:anglePerLengthMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Turn rate, radius of curvature computation. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="rateBuild" type="witsml:anglePerLengthMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Build Rate, radius of curvature computation. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="mdDelta" type="witsml:lengthMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Delta measured depth from previous station. </xsd:documentation>

<xsd:appinfo>Modified-in-version=1.4.0, By-issue=1.3-46, Change=Changed-type-from:measuredDepthCoord</xsd:appinfo>

</xsd:annotation>

</xsd:element>

-<xsd:element name="tvdDelta" type="witsml:lengthMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Delta true vertical depth from previous station. </xsd:documentation>

<xsd:appinfo>Modified-in-version=1.4.0, By-issue=1.3-46, Change=Changed-type-from:wellVerticalDepthCoord</xsd:appinfo>

</xsd:annotation>

</xsd:element>

-<xsd:element name="modelToolError" type="witsml:commentString" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>DEPRECATED. Tool error model used to compute covariance matrix. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="iscwsaToolErrorModel" type="witsml:refNameString" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Reference to the toolErrorModel object used to compute covariance matrix.</xsd:documentation>

<xsd:appinfo>Modified-in-version=1.4.1, By-issue=W-CR-008, Change=Added</xsd:appinfo>

</xsd:annotation>

</xsd:element>

-<xsd:element name="gravTotalUncert" type="witsml:accelerationLinearMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Survey tool gravity uncertainty. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="dipAngleUncert" type="witsml:planeAngleMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Survey tool dip uncertainty. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="magTotalUncert" type="witsml:magneticInductionMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Survey tool magnetic uncertainty. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="gravAccelCorUsed" type="witsml:logicalBoolean" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Was an accelerometer alignment correction applied to survey computation? Values are "true" (or "1") and "false" (or "0"). </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="magXAxialCorUsed" type="witsml:logicalBoolean" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Was a magnetometer alignment correction applied to survey computation? Values are "true" (or "1") and "false" (or "0").</xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="sagCorUsed" type="witsml:logicalBoolean" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Was a bottom hole assembly sag correction applied to the survey computation? Values are "true" (or "1") and "false" (or "0").</xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="magDrlstrCorUsed" type="witsml:logicalBoolean" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Was a drillstring magnetism correction applied to survey computation? Values are "true" (or "1") and "false" (or "0").</xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="infieldRefCorUsed" type="witsml:logicalBoolean" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Was an In Field Referencing (IFR) correction applied to the azimuth value? Values are "true" (or "1") and "false" (or "0"). An IFR survey measures the strength and direction of the Earth's magnetic field over the area of interest. By taking a geomagnetic modelled values away from these field survey results, we are left with a local crustal correction, which since it is assumed geological in nature, only varies over geological timescales. For MWD survey operations, these corrections are applied in addition to the geomagnetic model to provide accurate knowledge of the local magnetic field and hence to improve the accuracy of MWD magnetic azimuth measurements.</xsd:documentation>

<xsd:appinfo>Modified-in-version=1.4.0, By-issue=1.3.1-109, Change=Added</xsd:appinfo>

</xsd:annotation>

</xsd:element>

-<xsd:element name="interpolatedInfieldRefCorUsed" type="witsml:logicalBoolean" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Was an Interpolated In Field Referencing (IIFR) correction applied to the azimuth value? Values are "true" (or "1") and "false" (or "0"). Interpolated In Field Referencing measures the diurnal Earth magnetic field variations resulting from electrical currents in the ionosphere and effects of magnetic storms hitting the Earth. It increases again the accuracy of the magnetic azimuth measurement.</xsd:documentation>

<xsd:appinfo>Modified-in-version=1.4.0, By-issue=1.3.1-109, Change=Added</xsd:appinfo>

</xsd:annotation>

</xsd:element>

-<xsd:element name="inHoleRefCorUsed" type="witsml:logicalBoolean" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Was an In Hole Referencing (IHR) correction applied to the inclination and/or azimuth values? Values are "true" (or "1") and "false" (or "0"). In-Hole Referencing essentially involves comparing gyro surveys to MWD surveys in a tangent section of a well. Once a small part of a tangent section has been drilled and surveyed using an MWD tool, then an open hole (OH) gyro is run. By comparing the Gyro surveys to the MWD surveys a correction can be calculated for the MWD. This correction is then assumed as valid for the rest of the tangent section allowing to have a near gyro accuracy for the whole section, therefore reducing the ellipse of uncertainty (EOU) size.</xsd:documentation>

<xsd:appinfo>Modified-in-version=1.4.0, By-issue=1.3.1-109, Change=Added</xsd:appinfo>

</xsd:annotation>

</xsd:element>

-<xsd:element name="axialMagInterferenceCorUsed" type="witsml:logicalBoolean" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Was an Axial Magnetic Interference (AMI) correction applied to the azimuth value? Values are "true" (or "1") and "false" (or "0"). Most of the BHAs used to drill wells include an MWD tool. An MWD is a magnetic survey tool and as such suffer from magnetic interferences from a wide variety of sources. Magnetic interferences can be categorized into axial and radial type interferences. Axial interferences are mainly the result of magnetic poles from the drill string steel components located below and above the MWD tool. Radial interferences are numerous. Therefore, there is a risk that magXAxialCorUsed includes both Axial and radial corrections.</xsd:documentation>

<xsd:appinfo>Modified-in-version=1.4.0, By-issue=1.3.1-109, Change=Added</xsd:appinfo>

</xsd:annotation>

</xsd:element>

-<xsd:element name="cosagCorUsed" type="witsml:logicalBoolean" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>WWas a Cosag Correction applied to the azimuth values? Values are "true" (or "1") and "false" (or "0"). The BHA Sag Correction is the same as the Sag Correction except it includes the horizontal misalignment (Cosag).</xsd:documentation>

<xsd:appinfo>Modified-in-version=1.4.0, By-issue=1.3.1-109, Change=Added</xsd:appinfo>

</xsd:annotation>

</xsd:element>

-<xsd:element name="MSACorUsed" type="witsml:logicalBoolean" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Was a correction applied to the survey due to a Multi-Station Analysis process? Values are "true" (or "1") and "false" (or "0").</xsd:documentation>

<xsd:appinfo>Modified-in-version=1.4.0, By-issue=1.3.1-109, Change=Added</xsd:appinfo>

</xsd:annotation>

</xsd:element>

-<xsd:element name="gravTotalFieldReference" type="witsml:accelerationLinearMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Gravitational field theoretical/reference value. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="magTotalFieldReference" type="witsml:magneticInductionMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Geomagnetic field theoretical/reference value. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="magDipAngleReference" type="witsml:planeAngleMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Magnetic dip angle theoretical/reference value. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="magModelUsed" type="witsml:nameString" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Geomagnetic model used. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="magModelValid" type="witsml:nameString" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Current valid interval for the geomagnetic model used. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="geoModelUsed" type="witsml:nameString" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Gravitational model used. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="statusTrajStation" type="witsml:TrajStationStatus" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Status of the station. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="rawData" type="witsml:cs_stnTrajRawData" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Applies only to measured magnetic stations. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="corUsed" type="witsml:cs_stnTrajCorUsed" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Applies only to measured magnetic stations. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="valid" type="witsml:cs_stnTrajValid" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Applies only to measured magnetic stations. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="matrixCov" type="witsml:cs_stnTrajMatrixCov" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Covariance matrix for error model. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="location" type="witsml:cs_location" minOccurs="0" maxOccurs="unbounded">

-<xsd:annotation>

<xsd:documentation>The 2D coordinates of the item. Note that within the context of trajectory, the "original" coordinates are inherently local coordinates as defined above.</xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="sourceStation" type="witsml:cs_refWellboreTrajectoryStation" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>A pointer to the trajectoryStation from which this station was derived. The trajectoryStation may be in another wellbore.</xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="commonData" type="witsml:cs_commonData" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>A container element that contains elements that are common to all data objects. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="extensionNameValue" type="witsml:cs_extensionNameValue" minOccurs="0" maxOccurs="unbounded">

-<xsd:annotation>

<xsd:documentation>Extensions to the schema based on a name-value construct.</xsd:documentation>

<xsd:appinfo>Modified-in-version=1.4.0, By-issue=1.3.1-71, Change=Added</xsd:appinfo>

</xsd:annotation>

</xsd:element>

</xsd:sequence>

-<xsd:attributeGroup ref="witsml:attgrp_uid">

-<xsd:annotation>

<xsd:documentation>Unique identifier for the trajectory station. </xsd:documentation>

</xsd:annotation>

</xsd:attributeGroup>

</xsd:complexType>

</xsd:schema>