Setting Start Date Offsets to Peak Rate

After creating a type well analysis, notice that the decline analysis created on type well worksheets starts at time zero.

You can change the start period of a well by entering a value in the Start Date Offset boxes, or by clicking the blue left- or right-facing arrows next to the boxes. The number in the box corresponds to the time period in which production data starts for the well. (On a time plot, this is either months or days. On a cumulative plot, this is production volume produced in that time period. Therefore, a well with larger production volume will move more than a well with less production volume.)

Note:   Anything to the left of time zero (0 on the y-axis) is not used for the calculated lines or the decline forecast.

The Wells tab has the following icons: