-<xsd:schema elementFormDefault="qualified" attributeFormDefault="unqualified" targetNamespace="http://www.witsml.org/schemas/131" version="1.3.1">

-<!--

-->

-<!--

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	This file is distributed under the POSC License Agreement at
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	Use of this file constitutes agreement with the POSC License Agreement.

-->

-<!--

-->

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

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

-<!--

-->

-<xsd:complexType name="cs_cementStage">

-<xsd:annotation>

<xsd:documentation> WITSML - Cement Stage Component Schema </xsd:documentation>

</xsd:annotation>

-<xsd:sequence>

-<xsd:element name="numStage" type="witsml:positiveCount" minOccurs="1" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Stage number. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="typeStage" type="witsml:str32" minOccurs="1" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Stage type. </xsd:documentation>

</xsd:annotation>

</xsd:element>

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

-<xsd:annotation>

<xsd:documentation>Date and time when mixing started. </xsd:documentation>

</xsd:annotation>

</xsd:element>

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

-<xsd:annotation>

<xsd:documentation>Datetime at start of pumping cement. </xsd:documentation>

</xsd:annotation>

</xsd:element>

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

-<xsd:annotation>

<xsd:documentation>Datetime at end of pumping cement. </xsd:documentation>

</xsd:annotation>

</xsd:element>

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

-<xsd:annotation>

<xsd:documentation>Date and time when displacing cement started. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="mdTop" type="witsml:measuredDepthCoord" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Measured depth at top of interval. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="mdBottom" type="witsml:measuredDepthCoord" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Measured depth of base of cement. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="volExcess" type="witsml:volumeMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Excess volume. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="flowrateDisplaceAv" type="witsml:volumeFlowRateMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Average displacement rate. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="flowrateDisplaceMx" type="witsml:volumeFlowRateMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Maximum displacement rate. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="presDisplace" type="witsml:pressureMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Final displacement pressure. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="volReturns" type="witsml:volumeMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Volume of returns. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="eTimMudCirculation" type="witsml:timeMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Mud circulation elapsed time before the job. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="flowrateMudCirc" type="witsml:volumeFlowRateMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Rate mud circulated during stage. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="presMudCirc" type="witsml:pressureMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Mud circulation pressure. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="flowrateEnd" type="witsml:volumeFlowRateMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Final displacement pump rate. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="cementingFluid" type="witsml:cs_cementingFluid" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Displaced Mud, washes and spacers, cements, displacement mud. </xsd:documentation>

</xsd:annotation>

</xsd:element>

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

-<xsd:annotation>

<xsd:documentation>Annular flow at the end of displacement. Values are "true" (or "1") and "false" (or "0").</xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="squeezeObj" type="witsml:str32" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Squeeze objective. </xsd:documentation>

</xsd:annotation>

</xsd:element>

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

-<xsd:annotation>

<xsd:documentation>Squeeze obtained. Values are "true" (or "1") and "false" (or "0").</xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="mdString" type="witsml:measuredDepthCoord" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Measured depth of string (multi-stage cement job). </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="mdTool" type="witsml:measuredDepthCoord" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Measured depth of tool (multi-stage cement job. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="mdCoilTbg" type="witsml:measuredDepthCoord" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Measured depth of CoilTubing (multi-stage cement job. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="volCsgIn" type="witsml:volumeMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Total volume inside casing. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="volCsgOut" type="witsml:volumeMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Total volume outside casing for this stage placement. </xsd:documentation>

</xsd:annotation>

</xsd:element>

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

-<xsd:annotation>

<xsd:documentation>Tail pipe used? Values are "true" (or "1") and "false" (or "0").</xsd:documentation>

</xsd:annotation>

</xsd:element>

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

-<xsd:annotation>

<xsd:documentation>Tail pipe size (diameter). </xsd:documentation>

</xsd:annotation>

</xsd:element>

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

-<xsd:annotation>

<xsd:documentation>Tail pipe perforated? Values are "true" (or "1") and "false" (or "0").</xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="presTbgStart" type="witsml:pressureMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Tubing pressure at start of job (not coiled tubing). </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="presTbgEnd" type="witsml:pressureMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Tubing pressure at end of job. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="presCsgStart" type="witsml:pressureMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Casing pressure at start of job. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="presCsgEnd" type="witsml:pressureMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Casing pressure at end of job. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="presBackPressure" type="witsml:pressureMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Constant back pressure applied while pumping the job (can be supersede by a back pressure per pumping stage) </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="presCoilTbgStart" type="witsml:pressureMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Pressure CTU start. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="presCoilTbgEnd" type="witsml:pressureMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Pressure CTU end </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="presBreakDown" type="witsml:pressureMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Breakdown pressure. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="flowrateBreakDown" type="witsml:volumeFlowRateMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Breakdown rate. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="presSqueezeAv" type="witsml:pressureMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Squeeze pressure average. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="presSqueezeEnd" type="witsml:pressureMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Squeeze pressure final. </xsd:documentation>

</xsd:annotation>

</xsd:element>

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

-<xsd:annotation>

<xsd:documentation>Squeeze pressure held. Values are "true" (or "1") and "false" (or "0").</xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="presSqueeze" type="witsml:pressureMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Squeeze pressure left on pipe. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="eTimPresHeld" type="witsml:timeMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Time pressure held. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="flowrateSqueezeAv" type="witsml:volumeFlowRateMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Squeeze job average rate. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="flowrateSqueezeMx" type="witsml:volumeFlowRateMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Squeeze job maximum rate. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="flowratePumpStart" type="witsml:volumeFlowRateMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Pump rate at start of job. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="flowratePumpEnd" type="witsml:volumeFlowRateMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Pump rate at end of job. </xsd:documentation>

</xsd:annotation>

</xsd:element>

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

-<xsd:annotation>

<xsd:documentation>Pill below plug. Values are "true" (or "1") and "false" (or "0").</xsd:documentation>

</xsd:annotation>

</xsd:element>

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

-<xsd:annotation>

<xsd:documentation>Plug catcher. Values are "true" (or "1") and "false" (or "0").</xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="mdCircOut" type="witsml:measuredDepthCoord" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Circulate out measured depth. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="volCircPrior" type="witsml:volumeMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Circulate prior to start of job. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="typeOriginalMud" type="witsml:str32" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Type of mud in hole. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="wtMud" type="witsml:densityMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Mud density. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="visFunnelMud" type="witsml:timeMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Funnel viscosity in seconds (in hole at start of job). </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="pvMud" type="witsml:dynamicViscosityMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Plastic viscosity (in hole at start of job). </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="ypMud" type="witsml:pressureMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Yield point (in hole at start of job). </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="gel10Sec" type="witsml:pressureMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Gels-10Sec (in hole at start of job). </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="gel10Min" type="witsml:pressureMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Gels-10Min (in hole at start of job). </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="tempBHCT" type="witsml:thermodynamicTemperatureMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Bottom hole circulating temperature. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="tempBHST" type="witsml:thermodynamicTemperatureMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Bottom hole temperature static. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="volExcessMethod" type="witsml:str32" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Method to estimate excess volume. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="mixMethod" type="witsml:str32" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Mix method. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="densMeasBy" type="witsml:str32" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Method by which density is measured. </xsd:documentation>

</xsd:annotation>

</xsd:element>

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

-<xsd:annotation>

<xsd:documentation>Fluid returns. Values are "true" (or "1") and "false" (or "0").</xsd:documentation>

</xsd:annotation>

</xsd:element>

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

-<xsd:annotation>

<xsd:documentation>Top plug used? Values are "true" (or "1") and "false" (or "0").</xsd:documentation>

</xsd:annotation>

</xsd:element>

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

-<xsd:annotation>

<xsd:documentation>Bottom plug used. Values are "true" (or "1") and "false" (or "0").</xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="botPlugNumber" type="witsml:nonNegativeCount" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Amount of bottom plug used. </xsd:documentation>

</xsd:annotation>

</xsd:element>

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

-<xsd:annotation>

<xsd:documentation>Plug bumped? Values are "true" (or "1") and "false" (or "0"). </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="presPriorBump" type="witsml:pressureMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Pressure prior to bumping plug / pressure at end of displacement </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="presBump" type="witsml:pressureMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Pressure plug bumped. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="presHeld" type="witsml:pressureMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Pressure held to. </xsd:documentation>

</xsd:annotation>

</xsd:element>

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

-<xsd:annotation>

<xsd:documentation>Float held? Values are "true" (or "1") and "false" (or "0").</xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="volMudLost" type="witsml:volumeMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Total mud lost. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="fluidDisplace" type="witsml:str32" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Displacement fluid name. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="densDisplaceFluid" type="witsml:densityMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Density of displacement fluid. </xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="volDisplaceFluid" type="witsml:volumeMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Volume of displacement fluid. </xsd:documentation>

</xsd:annotation>

</xsd:element>

</xsd:sequence>

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

-<xsd:annotation>

<xsd:documentation>Unique identifier for the stage. </xsd:documentation>

</xsd:annotation>

</xsd:attributeGroup>

</xsd:complexType>

</xsd:schema>