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Frac Hit Configuration

Frac Hit Configuration (FH Config) - User Manual

This manual provides a detailed, step-by-step explanation of the Frac Hit Configuration (FH Config) tab. The FH Config tab allows you to simulate and visualize how nearby hydraulic fracturing operations (frac hits) impact the production of existing wells in your schedule.

By configuring these settings, you can model shut-ins, production losses, and recovery periods, which helps you plan a more accurate and realistic production schedule.

Step 1: Enable Frac Hit Effects

The first step is to turn on the Frac Hit simulation capabilities.

  • Enable Frac Hit Effects (Master Switch): Toggle this switch to activate the simulation of frac hits across your project. When enabled, all the configuration options below become active. If turned off, no frac hit logic will be applied to your schedule.

Step 2: Define the Detection Range

Once enabled, you need to tell the system how and where to look for frac hits between wells.

  • Dist. Threshold (m): This sets the maximum distance (in meters) within which a fracturing event on a new well will affect an existing well. If the distance between two wells is greater than this value, no frac hit is registered.

  • Detection Modes: These toggles define the directional logic for detecting a frac hit:

    • Perp (Perpendicular): Detects interference in the perpendicular (well-to-well) direction. Use this to model lateral communication between adjacent wells.
    • Para (Parallel): Detects interference in the parallel direction (along the length of the wellbore).
    • Cross (Cross-Layer): Detects interference across different landing zones (e.g., between upper and lower formations).

Step 3: Configure the Event Response

The Event Response panel controls exactly what happens to a producing well when it suffers a frac hit.

1. Shut-in Duration

Defines how long the affected well will be shut in (turned off) due to the frac hit. You have three modes to choose from:

  • Manual: Allows you to input a specific number of days in the Manual Time field (e.g., 30 days).
  • Pad Comp (Pad Completion): Automatically links the shut-in duration to the completion time of the entire pad causing the frac hit.
  • Closest (Closest Well): Automatically calculates the shut-in time based on the completion schedule of the specific nearest well causing the frac hit.

2. Ramp-up

  • Ramp-up (days): Defines the number of days it takes for the well to gradually reopen and reach its peak post-hit production rate after the shut-in period ends.

3. Peak Rate

Determines what production rate the well will hit immediately after the ramp-up period:

  • Original decline rate: The well returns exactly to the point on its original decline curve where it would have been if no shut-in occurred.
  • % from original rate: Applies a percentage adjustment to the original rate. If selected, you must specify the Adjustment (%). For example, entering -10% means the peak rate will be 10% lower than the expected original rate.

4. Impact & Recovery

Defines any permanent damage and how long the well takes to stabilize.

  • Prod. Loss (%): The permanent production loss applied to the well’s long-term forecast after it fully recovers. (e.g., 5% means the well will produce 5% less than its original forecast indefinitely).
  • Recovery Time (months): The time it takes for the well to transition from its post-hit Peak Rate to its final, long-term adjusted decline curve (incorporating the Prod. Loss).

Step 4: Preview the Production Response

On the right side of the screen, you have a Production Response Preview chart. This is an interactive tool to help you visualize the settings you just configured before applying them.

  • Preview Well Dropdown: Select a specific Type Well from your dataset to see how it would react to the current Frac Hit settings.
  • The Graph:
    • Original (Grey Dashed Line): Shows the well’s original base production rate without any frac hits.
    • Adjusted (Teal Solid Line): Shows the modified production rate. You will clearly see the sudden drop to zero (the shut-in), the ramp-up phase, the peak recovery, and the long-term production loss.
    • Zoom / Brush: You can use the slider at the bottom of the chart to zoom in on specific months and analyze the transition periods more closely.

Step 5: Apply & Recalculate

Once you are satisfied with the event response and the preview graph looks correct:

  • Click the Apply & Recalculate button at the top right of the screen.
  • A confirmation dialog will appear warning you that this action will trigger a full simulation across the entire schedule.
  • Click Run Simulation to apply your changes. The system will process the schedule and recalculate production volumes for all wells based on the distances and parameters you configured.