Question

Calculate the IJV st ANEW st HYX come ps as defined by the minimum and maximum limits; this is an integrated discussion with the Flow Assurance team:

Minimum setting depth limit:
Confirm minimum setting depth required by local regulations.
Obtain hydrate curve c/w mapped shut in tubing head pressure from the Production Technologist and, extrapolate the minimum depth which the valve needs to be set at to ensure it is set below the hydrate region. ​​

Answer 1

Here is a summary of the key considerations for calculating the IJV setting depth based on the provided information:

1. Determine the minimum setting depth required by local regulations. This sets the baseline minimum depth.

2. Obtain the hydrate curve from the Production Technologist, which shows the relationship between pressure and depth for hydrate formation conditions.

3. Extrapolate from the hydrate curve to determine the minimum depth where the tubing head pressure will be above the hydrate region, even under shut-in conditions. This provides a hydrate-limited minimum setting depth.

4. Compare the hydrate-limited minimum depth from step 3 with the regulatory minimum depth from step 1. The deeper of the two depths should be used as the final minimum setting depth for the IJV, to ensure both regulatory requirements and hydrate avoidance.

5. Additional considerations that may impact the minimum setting depth include:

- Flow conditions and required differential pressure across the IJV

- Temperature profiles with depth

- Internal washout/buildup potential above the IJV setting depth

In summary, the key tasks are to determine the relevant regulatory minimum depth, obtain hydrate modeling data to establish a hydrate-limited minimum depth, and select the deeper of the two as the final minimum setting depth for the IJV. Additional operational constraints may also influence the final minimum depth selection. An integrated discussion with the Flow Assurance team can help incorporate all relevant factors into the minimum depth calculations.