SimulationCore2/Rop/sROP_Module.f90

!module sROP_Module
!    
!use sROP_Variables    
!
!contains

subroutine Calculate_ROP

    use sROP_Other_Variables
    use sROP_Variables
    use CStringConfigurationVariables
    use CformationVariables
    use CSimulationVariables
    use CmudPropertiesVariables
    Use RTable_VARIABLES, only: RTable
    use TD_DrillStemComponents
    use TD_WellGeometry
    
    implicit none
    
    Integer :: i , ROP_SolDuration

    
    !TD_WellTotalLength = 10000.  !from T&D module  ?????????????????????delete this line
    Bit_Wearing = 0.0d0
    
    
    loop1: do
        CALL DATE_AND_TIME(values=ROP_StartTime)

    
  
    No_of_Formations = Formation%Count   !???????????????????????????????????????????
    Drilling_Depth = TD_WellTotalLength  !????????????????????????? change to vertical depth of well
    
   
    do i= 1,No_of_Formations   !???????????????????????????????????????
        FormationTopDepth = Formation%Formations(i)%Top   !???????????????????????????????????????
        if (Drilling_Depth>=FormationTopDepth) then    !???????????????????????????????????????
            FormationNumber = i   !???????????????????????????????????????
        end if    !???????????????????????????????????????
    end do    !???????????????????????????????????????

    !do while (FormationTopDepth < Drilling_Depth)
    !    FormationNumber = FormationNumber + 1
    !    FormationTopDepth = FormationTopDepth + Formations(FormationNumber)%Thickness
    !end do

    !Bit_Class = BitDefinition%BitCode
    !call bit_spec   
   
    
    ! $$$$$**$$$$$**$$$$$**$$$$$**$$$$$**     Variables Initialization:    *$$$$$**$$$$$**$$$$$**$$$$$**$$$$$  
    Diameter_of_Bit        =  StringConfiguration%BitDefinition%BitSize      ! unit : [in.] (Typical Range: 3.0 to 30.0)
    Number_of_Bit_Nozzles  =  StringConfiguration%BitDefinition%BitNozzleNo      ! (Typical Values: 1 to 10)
    Diameter_of_Bit_Nozzle =  StringConfiguration%BitDefinition%BitNozzleSize      ! unit : [1/32 in.] (Typical Range: 8.0 to 32.0)
    Critical_Mud_Density   =  Formation%Formations(FormationNumber)%PorePressureGradient/.465*9.      ! unit : [ppg] or [lb/gal] (Typical Range: 0 to 10.0)
    Critical_Weight_on_Bit =  (Formation%Formations(FormationNumber)%ThresholdWeight/5.)-(.06*(Formation%Formations(FormationNumber)%ThresholdWeight-10.))      ! unit : [klb/in] (Typical Range: 0 to 10 ----> 0.6 to 2)
    Mud_Viscosity          =  MudProperties%ActivePlasticViscosity    !?????????????????????????????????
    Mud_Density            =  MudProperties%ActiveDensity     !?????????????????????????????????
    Mud_Flowrate           =  10.   ![ppg]??????????????????????????????????????????????? from fluid module
    Reynolds_Number        =  Mud_Flowrate*Mud_Density/(Mud_Viscosity*Number_of_Bit_Nozzles*Diameter_of_Bit_Nozzle)           ! unit : [dimensionless] (Typical Range: 0.1 to 1000.0)    
    ! $$$$$**$$$$$**$$$$$**$$$$$**$$$$    End of Variable Initialization    $$$$$**$$$$$**$$$$$**$$$$$**$$$$$

    ! $$$$$**$$$$$**$$$$$**$$$$$**$$$$$**        Main Calculations:        *$$$$$**$$$$$**$$$$$**$$$$$**$$$$$
    x1 = 1.                      ! Drillability Variable
    x2 = 10000. - Drilling_Depth ! First Compaction Vairable
    x3 = (Drilling_Depth**0.69) * (Mud_Density - 9.) ! Second Compaction Vairable
    x4 = Drilling_Depth * (Mud_Density - Critical_Mud_Density) ! Underbalance Drilling Variable
    Condition = 1.

    Weight_on_Bit = TD_WeightOnBit/1000.  ![klb]
    !Weight_on_Bit = 10.
    if ( Weight_on_Bit > Critical_Weight_on_Bit ) then
        x5 = log( ( Weight_on_Bit - Critical_Weight_on_Bit ) / (4.*Diameter_of_Bit - Critical_Weight_on_Bit) )
    else
        x5 = 0.
        Condition = 0.
    end if
    
    Rotary_Speed = RTable%Speed   ![rpm] 
    !Rotary_Speed = 20.
    Rotary_Speed = abs(Rotary_Speed)
    if ( Rotary_Speed > 0. ) then
        x6 = log(Rotary_Speed/100.)
    else
        x6 = 0.
        Condition = 0.
    end if
    x7 = -Bit_Wearing
    x8 = Reynolds_Number
    ! -----**-----**-----**-----**-----**      Rate_of_Penetration Model Coefficients:     *-----**-----**-----**-----**-----
    a1 = log(Formation%Formations(FormationNumber)%Drillablity) !3.0643e+00
    a2 = 1.2799e-04
    a3 = 1.7952e-04
    a4 = 4.0656e-05
    a5 = 2.9021e-01
    a6 = 9.4882e-02
    a7 = 2.1837e-01
    a8 = 4.4915e-01
    dt = 0.1    ![s]
    Tou_H = Formation%Formations(FormationNumber)%Abrasiveness ! hr
    ! -----**-----**-----**-----**---     End of Rate_of_Penetration Model Coefficients:       ---**-----**-----**-----**-----

    !if ( Weight_on_Bit>0. .and. Rotary_Speed>0. .and. TD_DrillStems(1)%ComponentType==0 ) then   !???????????????????????????????????????
        Rate_of_Penetration = Condition*exp( a1*x1+a2*x2+a3*x3+a4*x4+a5*x5+a6*x6+a7*x7+a8*x8 )
    !end if          !???????????????????????????????????????
        
    IF (Rotary_Speed > 0.) THEN 
        Bit_Torque = ( 3.79 + 19.17*sqrt( Rate_of_Penetration / (Rotary_Speed*Diameter_of_Bit)) ) * Diameter_of_Bit * Weight_on_Bit * ( 1. / ( 1 + 0.00021*Drilling_Depth) )
    else
        Bit_Torque = 0.    
    endif
    
    if ( (Weight_on_Bit/Diameter_of_Bit)<(w_d_max) ) then
        Bit_Wearing = Bit_Wearing +( (dt*H3/Tou_H)*((Rotary_Speed/100.)**H1)*((w_d_max-4.)/(w_d_max-(Weight_on_Bit/Diameter_of_Bit)))*((1.+(H2/2.))/(1.+(H2*Bit_Wearing))) )
    else
        Bit_Wearing = 0.0d0   !( Typical Range: 0<=Bit_Wearing<=1 )
    end if
    
    !Drilling_Depth = Drilling_Depth + (Rate_of_Penetration*dt)
    

    !print*, 'exp=' , exp( a1*x1 + a2*x2 + a3*x3 + a4*x4 + a5*x5 + a6*x6 + a7*x7 + a8*x8 )
    !
    !print*, 'Bit_Torque=' , Bit_Torque
    !print*, 'Weight_on_Bit=' , Weight_on_Bit
    !
    !print*, 'Critical_Weight_on_Bit='  , Critical_Weight_on_Bit
    !print*, 'Condition='  , Condition
    !print*, 'FormationNumber='  , FormationNumber
    !print*, 'No_of_Formations='  , No_of_Formations
    !print*, 'Bit_Wearing='  , Bit_Wearing
    
    
     if(IsStopped == .true.) then
        EXIT loop1
     end if
    
     CALL DATE_AND_TIME(values=ROP_EndTime)
     ROP_SolDuration=100-(ROP_EndTime(6)*60000+ROP_EndTime(7)*1000+ROP_EndTime(8)-ROP_StartTime(6)*60000-ROP_StartTime(7)*1000-ROP_StartTime(8))
      if(ROP_SolDuration > 0.0d0) then
       CALL sleepqq(ROP_SolDuration)
      end if
    
    
    end do loop1


end subroutine Calculate_ROP

    
    
    
    
    
    
    
    
    subroutine bit_spec

    use sROP_Other_Variables    
    use sROP_Variables
    
    !H1=1.9
    !H2=7.
    !H3=1.
    !w_d_max=7.

     filename = 'Bit_Database.TXT' 
    open (UNIT=3, FILE=filename ) 
    !print*, 'w_d_max1='  , w_d_max
            !print*, 'name1='  , name
    !openif: if ( status == 0 ) then
        read (3,*,IOSTAT=status)    ! Get next value
        readloop: do i=1,14
            read (3,*,IOSTAT=status) name, H1, H2, H3, w_d_max   ! Get next value
            !print*, 'w_d_max='  , w_d_max
            !print*, 'name='  , name
            if ( status /= 0 ) exit           ! EXIT if not valid.
            if ( name == bit_Class/10) exit
        end do readloop
    !endif openif
    
end subroutine bit_spec   

!end module sROP_Module