rft

rft will convert the binary RFT files to dataframes or CSV files, facilitating analysis of inflow and pressure for each connection the well has to the reservoir grid.

Typical usage is to generate the CSV from the command line:

res2csv rft MYDATADECK.DATA --verbose --output rft.csv

It is possible to a specific well, a date (YYYY-MM-DD). If you enable debug mode through --debug, more information is printed, including an ASCII representation of each wells topology, and also three extra CSV files printed for the last processed well.

Eclipse usage

In order to get RFT files emitted from Eclipse, you need the WRFTPLT keyword in your .DATA file, example:

WRFTPLT
  '*' 'REPT' 'REPT' 'REPT' /
/

where * will match all wells defined up to this point.

From RMS11, you can insert

YYYY-MM-DD IORFT NAME='*' PLTFREQ='Yes' RFTFREQ='Yes' SEGFREQ='Yes'

into your events files to obtain the same (input a date in your specified date format).

Segment and ICD analysis

For multisegment wells, reservoir connections (CONxxxxx data) are matched to their corresponding well segment (SEGxxxxx data) and the matched data is returned on the same row in the CSV file, facilitating cross-plot of data.

When ICD segments are detected (well segments that sit alone on their own branch), these data are tagged with an ICD_ prefix to their SEGxxxxx columns, and also matched to the row with the connection and segment data. This facilitates analysis of f.ex. pressure drop from the reservoir, in the ICD, and in the tubing.

Limitations

Each segment must correspond to no more than one reservoir connection. This is the recommended way to model multisegment wells.

Segments not related to a reservoir connection are not included in the outputted CSV file.

Analysis examples

Example illustrating inflow analysis of a two-branch well in a visual tool for tabular data. From the data in the emitted CSV, branch lengths can be computed, inflow pr. phase can be plotted versus segment index or depth, or phase flow in the tubing versus the same. Pressure drop from reservoir cell to tubing can be analyzed. In this image, the data is filtered to a specific date.

Vertical injector/producer analysis for a gas injector that is later converted to a producer for the blowdown period (date indicated by colour). Gas inflow/outflow plotted versus grid k-index. This if for a non-multisegment well, and no segment data is available.

Column names

Column names and explanations

Vector	Description
CONDEPTH	Depth at the centre of each connection in the well
CONLENST	Length down the tubing from the BH reference point to the start of the connection
CONLENEN	Length down the tubing from the BH reference point to the far end of the connection
CONPRES	Pressure in the wellbore at the connection
CONORAT	Oil production rate of the connection at surface conditions
CONWRAT	Water production rate of the connection at surface conditions
CONGRAT	Gas production rate of the connection at surface conditions
CONOTUB	Oil flow rate through the tubing at the start of the connection at surface conditions
CONWTUB	Water flow rate through the tubing at the start of the connection at surface conditions
CONGTUB	Gas flow rate through the tubing at the start of the connection at surface conditions
CONVTUB	Volumetric flow rate of the mixture at the start of the connection
CONFAC	Connection transmissibility factor
CONKH	Connection Kh value
CONNXT	Number of the neighbouring connection towards the wellhead
CONSEGNO	Segment number containing the connection
CONBRNO	Branch number containing the connection
CONIPOS	I location of the connection
CONJPOS	J location of the connection
CONKPOS	K location of the connection
CONBDEPH	Depth of the grid block of the connection
CONBPRES	Pressure of the grid block of the connection (Copy of the PRESSURE data)
CONBSWAT	Water saturation of the grid block of the connection
CONBSGAS	Gas saturation of the grid block of the connection
CONBSOIL	Oil saturation of the grid block of the connection
COMPLETION	Completion index of the connection
CONMD	Measured depth of the connection
CONLENTH	Length of the connection
CONORATS	Scaled oil production rate at surface conditions
CONWRATS	Scaled water production rate at surface conditions
CONGRATS	Scaled gas production rate at surface conditions
SEGDEPTH	Depth at the far end of each segment
SEGLENST	Length down the tubing from the zero tubing length reference point to the start of the segment
SEGLELEN	Length down the tubing from the zero tubing length reference point to the far end of the segment
SEGXCORD	X-coordinate at the far end of the segment (as entered by the 11th item of the WELSEGS record)
SEGXCORD	Y-coordinate at the far end of the segment (as entered by the 12th item of the WELSEGS record)
SEGPRES	Pressure in the wellbore at the far end of the segment
SEGORAT	Oil flow rate through the segment through its near end
SEGWRAT	Water flow rate through the segment through its near end
SEGGRAT	Gas flow rate through the segment through its near end
SEGOVEL	Free oil phase velocity through the segment
SEGWVEL	Water flow velocity through the segment
SEGGVEL	Free gas phase flow velocity through the segment
SEGOHF	Free oil phase holdup fraction in the segment
SEGWHF	Water holdup fraction in the segment
SEGGHF	Free gas phase holdup fraction in the segment
SEGBRNO	Branch number of the segment
SEGNXT	Number of the neighbouring segment towards the wellhead
SEGMD	Segment measured depth
SEGLENTH	Segment length
SEGORATS	Scaled water flow rate through the segment
SEGWRATS	Scaled water flow rate through the segment
SEGGRATS	Scaled gas flow rate through the segment
SEGCORAT	Summed connection oil flow rate through segment
SEGCWRAT	Summed connection water flow rate through segment
SEGCGRAT	Summer connection gas flow rate through segment
SEGCORTS	Scaled summed connection oil flow rate through segment
SEGCWRTS	Scaled summed connection water flow rate through segment
SEGCGRTS	Scaled summed connection gas flow rate through segment

If addition, if you have branches with only one segment, these will be assumed to represent ICD segments. The corresponding SEG* data for these ICD segments will be joined to the segment they are connected to, and have their SEG* data renamed to ICD*. For understanding your ICD* data, look at the description of the analogue SEG* data above.