Identifying ISIP

Related Topic:

Instantaneous shut-in pressure (ISIP) is identified on the ISIP plot in a pre-closure analysis.

1. Position the ISIP line through the final injection point and the early falloff pressure data. The line may be rotated around its center point by clicking and dragging the line, or by moving the line by clicking and dragging the center point.

2. Click the ISIP arrow icon on the ISIP plot toolbar.

3. Click the ISIP plot to place the ISIP arrow.

4. Click the ISIP arrow to select it, and then use the left and right arrow keys to position the arrow where the pressure data starts to deviate from the ISIP line.