Module: LasReader

Included in:
CWLSLas
Defined in:
lib/las_reader.rb,
lib/las_reader/version.rb

Defined Under Namespace

Classes: Curve, CurveInfo, Mnemonic, WellInfo

Constant Summary collapse

VERSION = 
"0.0.5"

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#curves ⇒ Object (readonly)

Returns the value of attribute curves.



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# File 'lib/las_reader.rb', line 11

def curves
  @curves
end

#file_encode ⇒ Object (readonly)

Returns the value of attribute file_encode.



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# File 'lib/las_reader.rb', line 14

def file_encode
  @file_encode
end

#parameters ⇒ Object (readonly)

Returns the value of attribute parameters.



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# File 'lib/las_reader.rb', line 12

def parameters
  @parameters
end

#version ⇒ Object (readonly)

Returns the value of attribute version.



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# File 'lib/las_reader.rb', line 9

def version
  @version
end

#well_info ⇒ Object (readonly)

Returns the value of attribute well_info.



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# File 'lib/las_reader.rb', line 13

def well_info
  @well_info
end

#wrap ⇒ Object (readonly)

Returns the value of attribute wrap.



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# File 'lib/las_reader.rb', line 10

def wrap
  @wrap
end

Instance Method Details

#get_file_encoding(encoding) ⇒ Object 



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# File 'lib/las_reader.rb', line 171

def get_file_encoding(encoding)
  return Encoding.default_external if encoding.nil?
  if Encoding.name_list.include?(encoding)
    return Encoding.find(encoding)
  else
    raise "Encoding not supported" 
  end
end

#load_file(file_name, file_options = {}) ⇒ Object 



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# File 'lib/las_reader.rb', line 180

def load_file(file_name, file_options = {})

temp_array = []
@curves = {}
@parameters = {}
@acurves = []

read_state = 0

@file_encoding = get_file_encoding(file_options[:encoding]) 

unless File.exist?(file_name)
  raise "No such file or directory"
end

File.open(file_name, encoding: @file_encoding).each do |uline|

  # characters not supported in the default encoding are replaced by space - This is suggested by the CWLS LAS documentation.
  line = uline.encode(Encoding.default_external, @file_encoding, invalid: :replace, undef: :replace, replace: ' ')

  # ignore comments
  next if line[0].chr == '#' 
  # The '~' is used to inform the beginning of a section
  if line[0].chr == '~' 
    case line[1].chr
        when 'V' # Version information section
          read_state = 1 
        when 'W' # Well identification section
          @well_info = WellInfo.new
          read_state = 2 
        when 'C' # Curve information section
          read_state = 3
        when 'P' # Parameters information section
          #set_log_pattern(curves.size)
          read_state = 4 
        when 'O' # Other information section
          read_state = 5 
        when 'A' # ASCII Log data section
          read_state = 6 
        else
          raise "unsupported file format for #{line}"
        read_state = 0 # Unknow file format
      end
    else
      case read_state
      when 1
        set_version(line.lstrip)
      when 2
        set_well_info(line.lstrip) 
      when 3
        set_curve_info(line.lstrip)
      when 4
        set_parameters(line.lstrip)
      when 5
        set_other_info(line) 
      when 6
        if self.wrap
          temp_array = log_wrap_data(line,temp_array)
        else
          log_nowrap_data(line)
        end 
      end
    end
  end
end

#log_nowrap_data(info) ⇒ Object 



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# File 'lib/las_reader.rb', line 161

def log_nowrap_data(info)
  d=info.scan(/[-]?[0-9]+.[0-9]+/)
  unless d.nil?
    self.curves.each do |k,v|
      value = d[@acurves.index(k)].to_f
      v.log_data << ((value == @well_info.null_value) ? nil : value)
    end
  end
end

#log_wrap_data(info, temp_array) ⇒ Object 



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# File 'lib/las_reader.rb', line 148

def log_wrap_data(info,temp_array)
  d=info.scan(/[-]?[0-9]+.[0-9]+/)
  a = temp_array + d if not d.nil?
  if a.size == self.curves.size
    self.curves.each do |k,v|
      value = a[@acurves.index(k)].to_f
      v.log_data << ((value == @well_info.null_value) ? nil : value)
    end
    a = []
  end
  return a
end

#set_curve_info(info) ⇒ Object 



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# File 'lib/las_reader.rb', line 29

def set_curve_info(info)
  mnemonic = info.match(/(\w+)\s*\.(\S*)\s+(.*):\s*(.*)$/)
  unless mnemonic.nil?
    @curves["#{mnemonic[1]}"] = Curve.new(mnemonic[1],mnemonic[2],mnemonic[3],mnemonic[4])
    @acurves << mnemonic[1]
  end
end

#set_other_info(info) ⇒ Object 



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# File 'lib/las_reader.rb', line 145

def set_other_info(info)
end

#set_parameters(info) ⇒ Object 



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# File 'lib/las_reader.rb', line 37

def set_parameters(info)
  mnemonic = info.match(/(\w+)\s*\.(\S+)\s+(.*):\s*(.*)$/)
  unless mnemonic.nil?
    @parameters["#{mnemonic[1]}"] = Mnemonic.new(mnemonic[1],mnemonic[2],mnemonic[3],mnemonic[4])
  end
end

#set_version(info) ⇒ Object 



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# File 'lib/las_reader.rb', line 16

def set_version(info)
  version = info.match(/(VERS\s*\.).+([1-3]\.[0-9]).*:\s*(.*)/)
  if version.nil?
    wrap_mode = info.match(/(WRAP\s*\.).+(YES|NO).*:\s*(.*)/)
    if not wrap_mode.nil?
      @wrap =  (wrap_mode[2] == "YES") ? true : false
    end
  else
    @version = version[2]
    raise "LAS version not supported" if @version.to_f > 2.0
  end
end

#set_well_info(info) ⇒ Object 



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# File 'lib/las_reader.rb', line 44

def set_well_info(info)
 
  strt = info.match(/(STRT)\s*\.(\w).+\s([0-9]+\.[0-9]+).*:\s*(.*)/)
  unless strt.nil?
    @well_info.start_depth = strt[3].to_f
    @well_info.depth_unit = strt[2]
    return
  end

  stop = info.match(/(STOP)\s*\.(\w).+\s([0-9]+\.[0-9]+).*:\s*(.*)/)
  unless stop.nil?
    @well_info.stop_depth = stop[3].to_f
    return
  end

  step = info.match(/(STEP)\s*\.(\w).+\s(-?[0-9]+\.[0-9]+).*:\s*(.*)/)
  unless step.nil?
    @well_info.step = step[3].to_f
    return
  end

  null = info.match(/(NULL)\s*\..+\s(-?[0-9]+\.[0-9]+).*:\s*(.*)/)
  unless null.nil?
    @well_info.null_value = null[2].to_f
    return
  end

  comp = info.match(/(COMP\s*\..+COMPANY:\s*(.*))|(COMP\s*\.\s*(.*)\s*:\s*COMPANY)/)
  unless comp.nil?
    @well_info.company_name = (comp[2] or comp[4]).strip
    return
  end

  well = info.match(/(WELL\s*\..+WELL:\s*(.*))|(WELL\s*\.\s*(.*)\s*:\s*.*)/)
  unless well.nil?
    @well_info.well_name = (well[2] or well[4]).strip
    return
  end

  fld = info.match(/(FLD\s*\..+FIELD:\s*(.*))|(FLD\s*\.\s*(.*)\s*:\s*FIELD)/)
  unless fld.nil?
    @well_info.field_name = (fld[2] or fld[4]).strip
    return
  end

  loc = info.match(/(LOC\s*\..+LOCATION:\s*(.*))|(LOC\s*\.\s*(.*)\s*:\s*LOCATION)/)
  unless loc.nil?
    @well_info.location = (loc[2] or loc[4]).strip
    return
  end

  prov = info.match(/(PROV\s*\..+PROVINCE:\s*(.*))|(PROV\s*\.\s*(.*)\s*:\s*PROVINCE)/)
  unless prov.nil?
    @well_info.province = (prov[2] or prov[4]).strip
    return
  end

  cnty = info.match(/(CNTY\s*\..+COUNTY:\s*(.*))|(CNTY\s*\.\s*(.*)\s*:\s*COUNTY)/)
  unless cnty.nil?
    @well_info.county = (cnty[2] or cnty[4]).strip
    return
  end

  stat = info.match(/(STAT\s*\..+STATE:\s*(.*))|(STAT\s*\.\s*(.*)\s*:\s*STATE)/)
  unless stat.nil?
    @well_info.state = (stat[2] or stat[4]).strip
    return
  end

  ctry  = info.match(/(CTRY\s*\..+COUNTRY:\s*(.*))|(CTRY\s*\.\s*(.*)\s*:\s*COUNTRY)/)
  unless ctry.nil?
    @well_info.country = (ctry[2] or ctry[4]).strip
    return
  end

  srvc = info.match(/(SRVC\s*\..+SERVICE COMPANY:\s*(.*))|(SRVC\s*\.\s*(.*)\s*:\s*SERVICE COMPANY)/)
  unless srvc.nil?
    @well_info.service_company = (srvc[2] or srvc[4]).strip
    return
  end

  data = info.match(/(DATE\s*\..+LOG DATE:\s*(.*))|(DATE\s*\.\s*(.*)\s*:\s*LOG DATE)/)
  unless data.nil?
    @well_info.date_logged = (data[2] or data[4]).strip
    return
  end

  uwi = info.match(/(UWI\s*\..+UNIQUE WELL ID:\s*(.*))|(UWI\s*\.\s*(.*)\s*:\s*UNIQUE WELL ID)/)
  unless uwi.nil?
    @well_info.uwi = (uwi[2] or uwi[4]).strip
    return
  end

  api = info.match(/(API\s*\..+UNIQUE WELL ID\s*:\s*(.*))|(API\s*\.\s*(.*)\s*:\s*UNIQUE WELL ID\s*)/)
  unless api.nil?
    @well_info.api = (api[2] or api[4]).strip
    return
  end

end