Sanding Evaluation Log

The main goal of the Sanding Evaluation Log tool is to calculate three main output logs:

  • Load Factor (LF) log
  • Critical Drawdown Pressure (CDD) log
  • Critical Bottomhole Flowing Pressure (CBHFP) log

The LF log is the 'most important' log in the sense that it indicates whether sanding occurs, or not. If the LF value is greater than 1.0, at that depth the wellbore produces sand. Output logs can be calculated for an Open Hole and Cased Hole situation. For a Cased Hole situation you must provide additional information via the Perforation Orientation Scenarios form. On this form, you specify the orientation of the perforations. The sanding evaluation logs are calculated per each of these perforation orientations. In case you specified multiple production scenarios (on the Production Scenarios form), all calculations are performed per each production scenario.

To calculate and show the sanding evaluation logs

MD range  Specify the interval over which you want to calculate the sanding evaluation logs by entering the start and end MD.

Select Open Hole and/or Cased Hole.

To calculate evaluation logs for a Cased Hole, you have to have provided perforation orientations on the Perforation Orientation Scenarios form.

(Re)Calculate  The output logs are calculated and stored in the JewelExplorer, under Well Data > Wells > All Logs. For the Cased Hole situation, one set of output logs is calculated per each perforation orientation. In case of multiple production scenarios, a set of logs per production scenario.

Show  Clicking this button opens the Sanding Evaluation view (this is a dedicated Well View with default settings for sanding evaluation). The Open Hole and/or Cased Hole output logs displayed in separate tracks. For a Cased Hole situation, one set of output logs per each perforation orientation. Multiple production scenarios (if any) are shown in separate tracks for easy comparison.

Upon opening of the view, the LF log is highlighted in red where the Load Factor log exceeds the critical loading factor of 1.0 (a Critical Load Factor log is shown by default in each track as a dashed line). This gives a clear indication where sanding occurs.