RE: The “Replication Fallacy” / “Replication Delusion”19 Jun 2025 08:42
TXP seems to have been remarkably opaque on sidetrack costs but this AI summary of sidetrack costs suggests 50% to me, particularly because they were unplanned:
A sidetrack adds significant cost to a well, but the exact amount varies considerably. It can range from a few million dollars to tens of millions, depending on factors like the type of sidetrack (planned or unplanned, mechanical or geological), the depth of the sidetrack, the location (onshore vs. offshore), and the specific challenges encountered.
Factors Influencing Sidetrack Costs:
Type of Sidetrack:
Planned Sidetracks: These are often more cost-effective as they are anticipated and can leverage existing infrastructure, potentially saving on rig time and other costs.
Unplanned Sidetracks: These are more expensive due to the need to address unforeseen issues, such as stuck tools, wellbore instability, or encountering unexpected geological formations.
Mechanical vs. Geological Sidetracks:
Mechanical sidetracks (e.g., cutting through casing to create a new wellbore) can be more expensive than geological sidetracks (e.g., following a natural fracture).
Depth and Location:
Deeper wells and offshore operations naturally increase costs due to the complexity and logistical challenges involved.
Reservoir Type:
Sidetracking into marginal or uncertain reservoirs can be less expensive than drilling new wells into those reservoirs.
Non-Productive Time (NPT):
Any delays or issues encountered during the sidetracking process can significantly increase costs.
Casing Wear:
Sidetracking can cause wear on existing casing, potentially requiring repairs or even casing replacement, adding to the overall cost.
Remediation:
If a sidetrack fails or causes damage to the wellbore, the cost of remediation can be substantial.