SimulationCore2/Rop/ROP_MainCalculation.f90

subroutine ROP_MainCalculation

    use sROP_Other_Variables
    use sROP_Variables
    use CStringConfigurationVariables
    use CformationVariables
    use CSimulationVariables
    use CDataDisplayConsoleVariables
    use CDrillingConsoleVariables
    use CmudPropertiesVariables
    use CHoistingVariables
    use CDrillingConsole
    use CPathGenerationVariables
    use RTable_VARIABLES, only: RTable
    use TD_DrillStemComponents
    use TD_WellGeometry
    use PressureDisplayVARIABLES
    use MudSystemVARIABLES
    use FricPressDropVars
    use CReservoirVariables
    use CWarningsVariables
    use TopDrive_VARIABLES, only: TDS
    use TD_GeneralData
    
    implicit none
    
    Integer :: i , zero_ROPcount
    !Real(8) :: Set_ROPGauge
    
    zero_ROPcount = 0
    No_of_Formations = FormationCount
    Drilling_verticalDepth = TD_WellTotalVerticalLength
    
    
    
   !===> MaximumWellDepthExceeded Warning
    if ( Drilling_verticalDepth>=(Formations(FormationCount)%Top+Formations(FormationCount)%Thickness) ) then
        Rate_of_Penetration = 0.0d0
        Call Set_ROP(Rate_of_Penetration)
        Call Activate_MaximumWellDepthExceeded()
        return
    end if
   !=====================================
    
    
    
    if ( FormationNumber/=0 .and. HideDrillingBrake==1 ) then      ! Hide Drilling Brake Mode
        FormationNumber = FormationNumber
    else
        do i= 1,No_of_Formations   
            FormationTopDepth = Formations(i)%Top
            if (Drilling_verticalDepth>=FormationTopDepth) then    
                FormationNumber = i   
            end if
        end do
    end if
    
    
    
    
    !!===> Hide Drilling Brake Mode
    !if ( FormationNumber==FormationNo .and. HideDrillingBrake==1 ) then  !????????????
    !    FormationNumber = FormationNo-1
    !end if
    !!=============================
    
    
    
    
    !Bit_Class = BitDefinition%BitCode     !????????????
    call Bit_Specification
    
    
    
    
    ! $$$$$**$$$$$**$$$$$**$$$$$**$$$$$**     Variables Initialization:    *$$$$$**$$$$$**$$$$$**$$$$$**$$$$$  
    Diameter_of_Bit        =  BitDefinition%BitSize          ! unit : [in.] (Typical Range: 3.0 to 30.0)
    Number_of_Bit_Nozzles  =  BitDefinition%BitNozzleNo      ! (Typical Values: 1 to 10)
    Diameter_of_Bit_Nozzle =  BitDefinition%BitNozzleSize    ! unit : [inch] *** basic input: [1/32 in.] (Typical Range: 8.0 to 32.0)
    Critical_Mud_Density   =  Formations(FormationNumber)%PorePressureGradient/.465d0*9.d0      ! ????????? delete ,unit : [ppg] or [lb/gal] (Typical Range: 0 to 10.0)
    FormationMud_Density   =  Formations(FormationNumber)%PorePressureGradient/0.052d0
    BottomHole_Pressure    =  PressureGauges(3)              !5200 [psi]
    ECD                    =  BottomHole_Pressure/(0.052*Drilling_verticalDepth)
    Critical_Weight_on_Bit =  (Formations(FormationNumber)%ThresholdWeight/5.d0)-(.06d0*(Formations(FormationNumber)%ThresholdWeight-10.d0))      ! unit : [klb/in] (Typical Range: 0 to 10 ----> 0.6 to 2)
    !IF (ALLOCATED(FlowEl)) THEN
    !    Mud_Viscosity     =  FlowEl(NoHorizontalEl + NoStringEl)%mueff     !13.5  [cP]
        Mud_Density        = BitMudDensity ! [ppg]
    !ELSE
        Mud_Viscosity      =  13.5         ! [cP]
        !Mud_Density       =  9.2          ! [ppg]
    !END IF
    Mud_Flowrate           =  StringFlowRateFinal    ! [gpm]
    Reynolds_Number        =  Mud_Flowrate*Mud_Density/(Mud_Viscosity*Number_of_Bit_Nozzles*Diameter_of_Bit_Nozzle)           ! unit : [dimensionless] (Typical Range: 0.1 to 1000.0)    
    ! $$$$$**$$$$$**$$$$$**$$$$$**$$$$    End of Variable Initialization    $$$$$**$$$$$**$$$$$**$$$$$**$$$$$
    
    
    
    
    
    ! -----**-----**-----**-----**-----*      Rate_of_Penetration Model Coefficients:     *-----**-----**-----**-----**-----
    a1 = log(Formations(FormationNumber)%Drillablity) 
    a2 = 1.2799d-04
    a3 = 1.7952d-04
    a4 = 4.0656d-05
    a5 = 2.9021d-01
    a6 = 9.4882d-02
    a7 = 2.1837d-01
    a8 = 4.4915d-01
    dt = 0.1d0   ![s]
    Tou_H = Formations(FormationNumber)%Abrasiveness*3600.d0    ! [hr]--->[s]   ( Typical Range: 1<Abrasiveness<100 )
    ! -----**-----**-----**-----**---     End of Rate_of_Penetration Model Coefficients      ---**-----**-----**-----**-----
    
    
    
    
    
    
    ! $$$$$**$$$$$**$$$$$**$$$$$**$$$$$**        Main Calculations:        *$$$$$**$$$$$**$$$$$**$$$$$**$$$$$
    f1 = Formations(FormationNumber)%Drillablity                        ! 1<=Drillability<=100  [ft/h]
    f2 = exp(2.303d0*a2*(10000.d0 - Drilling_verticalDepth))            ! First Compaction Vairable
    f3 = exp(2.303d0*a3*(Drilling_verticalDepth**0.69d0)*(FormationMud_Density-9.d0))    ! Second Compaction Vairable
    
    
    if ( (2.303d0*a4*Drilling_verticalDepth*(FormationMud_Density-ECD))>=0.d0 ) then
        f4 = exp(2.303d0*a4*Drilling_verticalDepth*(FormationMud_Density-ECD))           ! Underbalance Drilling Variable
    else
        f4 = 1.0d0
    end if
    
    
    if (TD_WeightOnBit>0.d0) then
        Weight_on_Bit = TD_WeightOnBit/1000.d0    ![klb]
    else
        Weight_on_Bit = 0.d0
    end if
    
    if ( (Weight_on_Bit/Diameter_of_Bit)<Critical_Weight_on_Bit ) then
        f5 = 0.0d0
    else
        f5 = ( ((Weight_on_Bit/Diameter_of_Bit)-Critical_Weight_on_Bit)/(4.d0-Critical_Weight_on_Bit) )**a5 
    end if
   
    
    if (DriveType==1 .and. RTable%Speed>0.d0) then
        Rotary_Speed = RTable%Speed               ![rpm]
    else if (DriveType==0 .and. (TDS%Speed>0. .or. RTable%Speed>0.)) then
        Rotary_Speed = TDS%Speed+RTable%Speed     ![rpm]
    else
        Rotary_Speed = 0.0d0
    end if
    f6 = (Rotary_Speed/100.d0)**a6
    
    
    f7 = exp(-a7*Bit_Wearing)
    
    
    Call JetImpactForce
    f8 = JetImpact_Force/1000.d0
    
    
    
    
    Rate_of_Penetration = (f1*f2*f3*f4*f5*f6*f7*f8)    ![ft/h]
    Rate_of_Penetration = (DINT(Rate_of_Penetration*10.d0))/10.d0
    
    if ( (TD_WellTotalLength==PathGenerations(PathGenerationCount)%MeasuredDepth) ) then
        Set_ROPGauge = Rate_of_Penetration
        Call Set_ROP(Set_ROPGauge)                     ![ft/h]
        Old_ROPValue(4) = Rate_of_Penetration
        !print* , 'first rop=' , Old_ROPValue , Rate_of_Penetration ,&
        !    zero_ROPcount , Set_ROPGauge , Old_ROPDepth , TD_WellTotalLength , PathGenerations(PathGenerationCount)%MeasuredDepth
    else if ( ((TD_WellTotalLength+(Rate_of_Penetration*TD_TimeStep/3600.d0))-Old_ROPDepth)>=0.1 ) then
        do i= 1,4
            if ( Old_ROPValue(i)==0. ) then
                zero_ROPcount = zero_ROPcount+1
            end if
        end do
        Set_ROPGauge = (Rate_of_Penetration+Old_ROPValue(1)+Old_ROPValue(2)+Old_ROPValue(3)+Old_ROPValue(4))/sngl(5-zero_ROPcount)
        Call Set_ROP(Set_ROPGauge)                     ![ft/h]
        do i= 2,4
            Old_ROPValue(i-1) = Old_ROPValue(i)
        end do
        Old_ROPValue(4) = Rate_of_Penetration
        Old_ROPDepth    = TD_WellTotalLength+(Rate_of_Penetration*TD_TimeStep/3600.d0)
        !print* , 'new rop=' , Old_ROPValue , Rate_of_Penetration ,&
        !    zero_ROPcount , Set_ROPGauge , Old_ROPDepth , TD_WellTotalLength , PathGenerations(PathGenerationCount)%MeasuredDepth
    else
        Call Set_ROP(Set_ROPGauge)                     ![ft/h]
        !print* , 'old rop=' , Old_ROPValue , Rate_of_Penetration ,&
        !    zero_ROPcount , Set_ROPGauge , Old_ROPDepth , TD_WellTotalLength , PathGenerations(PathGenerationCount)%MeasuredDepth
    end if    
    
    
    
    
    
    
    if (Rotary_Speed > 0.d0) THEN 
        Bit_Torque = ( 3.79d0 + 19.17d0*sqrt( Rate_of_Penetration / (Rotary_Speed*Diameter_of_Bit)) ) * Diameter_of_Bit * Weight_on_Bit * ( 1.d0 / ( 1.d0 + 0.00021d0*Drilling_verticalDepth) )
        !Bit_Torque = Bit_Torque/3.   !bi dalil taghsim bar 3 shode(chon adad bozorg bude), baadan az rabete check shavad (seyyed gofte)
    else
        Bit_Torque = 0.d0
    end if
   
    
    
    if ( (Weight_on_Bit/Diameter_of_Bit)<(w_d_max) ) then
        Bit_Wearing = Bit_Wearing +( (dt*H3/Tou_H)*((Rotary_Speed/100.d0)**H1)*((w_d_max-4.d0)/(w_d_max-(Weight_on_Bit/Diameter_of_Bit)))*((1.d0+(H2/2.d0))/(1.d0+(H2*Bit_Wearing))) )
    else
        Bit_Wearing = 1.0d0          !( Typical Range: 0<=Bit_Wearing<=1 )
    end if
    
    
    
    Bearing_Wear = Bearing_Wear+(dt/3600.d0)*(Rotary_Speed/100.d0/Br_Coef)*((Weight_on_Bit/4.d0/Diameter_of_Bit)**1.5d0)
    
    
    !print*, 'Rate_of_Penetration=', Rate_of_Penetration
    !!print*, 'FormationMud_Density=', FormationMud_Density
    !!print*, 'ECD=', ECD
    !!print*, 'Drilling_verticalDepth=', Drilling_verticalDepth
    !!print*, 'power=', (2.303*a4*Drilling_verticalDepth*(FormationMud_Density-ECD))
    !print*, 'Rotary_Speed=', Rotary_Speed
    !!
    !print*, 'f1=', f1
    !print*, 'f2=', f2
    !print*, 'f3=', f3
    !print*, 'f4=', f4
    !print*, 'f5=', f5
    !print*, 'f6=', f6
    !print*, 'f7=', f7
    !print*, 'f8=', f8
    !print*, '***********************'

    
    
    
    
end subroutine