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

-<!--

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-<!--

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	This file is distributed under the Energistics License Agreement at
	http://www.energistics.org
	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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-<!--

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

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

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

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

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

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

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-<xsd:complexType name="cs_stimPdatSession">

-<xsd:annotation>

<xsd:documentation>A pumping diagnostics session.</xsd:documentation>

<xsd:appinfo>Modified-in-version=1.4.1, By-issue=W-CR-010, Change=Added</xsd:appinfo>

</xsd:annotation>

-<xsd:sequence>

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

-<xsd:annotation>

<xsd:documentation>The name of the session.</xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="description" type="witsml:descriptionString" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>A description of the session.</xsd:documentation>

</xsd:annotation>

</xsd:element>

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

-<xsd:annotation>

<xsd:documentation>The number of this pumping diagnostics session.</xsd:documentation>

</xsd:annotation>

</xsd:element>

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

-<xsd:annotation>

<xsd:documentation>The date and time pumping began.</xsd:documentation>

</xsd:annotation>

</xsd:element>

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

-<xsd:annotation>

<xsd:documentation>The date and time pumping ended.</xsd:documentation>

</xsd:annotation>

</xsd:element>

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

-<xsd:annotation>

<xsd:documentation>The date and time at which a well ceases flowing and the valves are closed.</xsd:documentation>

</xsd:annotation>

</xsd:element>

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

-<xsd:annotation>

<xsd:documentation>The date and time when the fluid in the fracture is completely leaked off into the formation and the fracture closes on its faces.</xsd:documentation>

</xsd:annotation>

</xsd:element>

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

-<xsd:annotation>

<xsd:documentation>The time between the shutin time and the pump on time.</xsd:documentation>

</xsd:annotation>

</xsd:element>

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

-<xsd:annotation>

<xsd:documentation>Average bottomhole treatment pressure.</xsd:documentation>

</xsd:annotation>

</xsd:element>

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

-<xsd:annotation>

<xsd:documentation>Bottomhole hydrostatic pressure.</xsd:documentation>

</xsd:annotation>

</xsd:element>

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

-<xsd:annotation>

<xsd:documentation>The pressure at which gas begins to break out of an under saturated oil and form a free gas phase in the matrix or a gas cap.</xsd:documentation>

</xsd:annotation>

</xsd:element>

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

-<xsd:annotation>

<xsd:documentation>The pressure when the fracture width becoms zero.</xsd:documentation>

</xsd:annotation>

</xsd:element>

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

-<xsd:annotation>

<xsd:documentation>The pressure loss due to fluid friction with the pipe while a fluid is being pumped.</xsd:documentation>

</xsd:annotation>

</xsd:element>

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

-<xsd:annotation>

<xsd:documentation>Initial shutin pressure.</xsd:documentation>

</xsd:annotation>

</xsd:element>

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

-<xsd:annotation>

<xsd:documentation>The pressure of the liquids in the formation pores.</xsd:documentation>

</xsd:annotation>

</xsd:element>

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

-<xsd:annotation>

<xsd:documentation>Average bottomhole treatment flow rate.</xsd:documentation>

</xsd:annotation>

</xsd:element>

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

-<xsd:annotation>

<xsd:documentation>The density of the fluid.</xsd:documentation>

</xsd:annotation>

</xsd:element>

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

-<xsd:annotation>

<xsd:documentation>Base fluid volume entering equipment.</xsd:documentation>

</xsd:annotation>

</xsd:element>

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

-<xsd:annotation>

<xsd:documentation>The volume of fluid in the wellbore.</xsd:documentation>

</xsd:annotation>

</xsd:element>

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

-<xsd:annotation>

<xsd:documentation>The measured depth of the wellbore to its injection point.</xsd:documentation>

</xsd:annotation>

</xsd:element>

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

-<xsd:annotation>

<xsd:documentation>The measured depth of the bottom of the hole.</xsd:documentation>

</xsd:annotation>

</xsd:element>

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

-<xsd:annotation>

<xsd:documentation>The measured depth of the middle perforation.</xsd:documentation>

</xsd:annotation>

</xsd:element>

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

-<xsd:annotation>

<xsd:documentation>The true vertical depth of the middle perforation.</xsd:documentation>

</xsd:annotation>

</xsd:element>

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

-<xsd:annotation>

<xsd:documentation>The constant earth temperature at a given depth specific to a region.</xsd:documentation>

</xsd:annotation>

</xsd:element>

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

-<xsd:annotation>

<xsd:documentation>Static bottomhole temperature.</xsd:documentation>

</xsd:annotation>

</xsd:element>

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

-<xsd:annotation>

<xsd:documentation>Temperature of the fluid at the surface.</xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="fluidCompressibility" type="witsml:compressibilityMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>The volume change of a fluid when pressure is applied.</xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="reservoirTotalCompressibility" type="witsml:compressibilityMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>The volume change of a reservoir material when pressure is applied.</xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="fluidNprimeFactor" type="witsml:unitlessQuantity" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Power law component. As n decreases from 1, the fluid becomes more shear thinning. Reducing n produces more non-Newtonian behavior.</xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="fluidKprimeFactor" type="witsml:unitlessQuantity" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>The consistency index K is the shear stress or viscosity of the fluid at one sec-1 shear rate. An increasing K raises the effective viscosity.</xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="fluidSpecificHeat" type="witsml:specificHeatCapacityMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>The heat required to raise one unit mass of a substance by one degree.</xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="fluidThermalConductivity" type="witsml:thermalConductivityMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>In physics, thermal conductivity is the property of a material describing its ability to conduct heat. It appears primarily in Fourier's Law for heat conduction. Thermal conductivity is measured in watts per kelvin-meter. Multiplied by a temperature difference (in kelvins) and an area (in square meters), and divided by a thickness (in meters), the thermal conductivity predicts the rate of energy loss (in watts) through a piece of material.</xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="fluidThermalExpansionCoefficient" type="witsml:thermalVolumetricExpansionMeasure" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Dimensional response to temperature change is expressed by its coefficient of thermal expansion. When the temperature of a substance changes, the energy that is stored in the intermolecular bonds between atoms changes. When the stored energy increases, so does the length of the molecular bonds. As a result, solids typically expand in response to heating and contract on cooling. The degree of expansion divided by the change in temperature is called the material's coefficient of thermal expansion and generally varies with temperature.</xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="fluidEfficiency" type="witsml:volumePerVolumeMeasurePercent" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>A measurement, derived from a data frac, of the efficiency of a particular fluid in creating fracture area on a particular formation at a set of conditions.</xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="foamQuality" type="witsml:volumePerVolumeMeasurePercent" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>Foam quality percentage of foam for the job during the stimulation services.</xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="percentPad" type="witsml:volumePerVolumeMeasurePercent" minOccurs="0" maxOccurs="1">

-<xsd:annotation>

<xsd:documentation>The volume of the pad divided by the (volume of the pad + the volume of the proppant laden fluid).</xsd:documentation>

</xsd:annotation>

</xsd:element>

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

-<xsd:annotation>

<xsd:documentation>The number of a stage associated with this diagnostics session.</xsd:documentation>

</xsd:annotation>

</xsd:element>

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

-<xsd:annotation>

<xsd:documentation>Are the calculations corrected for temperature. A value of "true" (or "1") indicates that the calculations were corrected for temperature. A value of "false" (or "0") or not given indicates otherwise.</xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="stepRateTest" type="witsml:cs_stimStepTest" minOccurs="0" maxOccurs="unbounded">

-<xsd:annotation>

<xsd:documentation>An injection test, plotted pressure against injection rate, where a curve deflection and change of slope indicates the fracture breakdown pressure.</xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="fluidEfficiencyTest" type="witsml:cs_stimFetTest" minOccurs="0" maxOccurs="unbounded">

-<xsd:annotation>

<xsd:documentation>A diagnostic test determining fluid efficiency.</xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="pumpFlowBackTest" type="witsml:cs_stimPumpFlowBackTest" minOccurs="0" maxOccurs="unbounded">

-<xsd:annotation>

<xsd:documentation>A diagnostic test involving flowing a well back after treatment.</xsd:documentation>

</xsd:annotation>

</xsd:element>

-<xsd:element name="stepDownTest" type="witsml:cs_stimStepDownTest" minOccurs="0" maxOccurs="unbounded">

-<xsd:annotation>

<xsd:documentation>An injection test involving multiple steps of injection rate and pressure, where a curve deflection and change of slope indicates the fracture breakdown pressure.</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:annotation>

</xsd:element>

</xsd:sequence>

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

-<xsd:annotation>

<xsd:documentation>Unique identifier that has been assigned to the (XML) node.</xsd:documentation>

</xsd:annotation>

</xsd:attributeGroup>

</xsd:complexType>

-<!--

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</xsd:schema>