Subsurface Engineering & Design

Key Features

• Industry experts in frac string engineering designs.
• Generated/evaluated over 300 different strings.
• Transient thermal analysis of disposal well tubing strings and packer selection
• Acid gas injection (AGI) well tubing and packer material selection
• Wellhead load analysis and thermal expansion modeling
• Geothermal wellbore and tubing string design

Benefits of WELLCAT Software

• Reduced tubing and casing costs
• Corporate risk reduction and enhanced due diligence
• Enhanced environmental protection measure
• AER Directive 10 compliance (Clause 1.8)
• Meet PWP requirements established by APEG
• Template/Area/Asset-based design analysis available
• Maximize benefits at minimal costs

Deepwater license

The additional deep water license capabilities include temperature flow modeling using VIT (vacuum-insulated tubing) thermal flow and tubing analysis of production operations with Electrical Submersible Pump (ESP); Rupture DIsk, Syntactic Foam trap annular pressure mitigation techniques, and wellhead-movement progressive- failure analysis.

Cold startups

In some subsea completions, a cold startup (initial flow) can be hampered or made impossible because of temperature losses and hydrating near the seabed mudline. VIT minimizes this problem by maintaining wellbore temperatures to prevent hydrate formation. The modeling of these temperature and pressure conditions for VIT can now be analyzed using the deepwater license feature.

VIT modeling

The VIT enhancements add critical technology to the WELLCAT modules aimed specifically at solving VIT applications for deepwater and heavy-oil design problems. The heavy-oil capabilities are designed for high-temperature steam- injection scenarios. The VIT option is used to model thermal flow and stress analysis of vacuum-insulated tubing within the WELLCAT application. VIT is used to
mitigate the risks of APB, cold startups, and heavy-oil production when using the latest VIT systems

Heavy-oil production

In heavy-oil production scenarios, VIT helps maintain lower viscosity levels in steam flooding, “huff and puff,” and steam-assisted gravity drainage (SAGD) projects, reducing the need for artificial lift techniques and increasing total ultimate recovery (reservoir draw down). Using the deepwater license feature in combination with the WELLCAT steam- injection modeling license feature, it is possible to model temperature and pressure for vacuum-insulated tubing in heavy-oil production scenarios.

Annular pressure buildup

In deep water, high temperature and high annular pressure can cause casing strings to burst or collapse. Operators use VIT to mitigate these risks. VIT temperature-flow modeling using the deepwater license feature in combination with the WELLCAT Multi-string Design module helps model these possible scenarios.

Electrical Submersible Pump (ESP)

Extreme to ultra-deep HPHT reservoirs present the challenges of having low natural flow ability, the use of sub-,udline system such as (ESP) would help to increase production rates and increase well recovery. WELLCAT software includes production thermal flow simulation and tubing analysis of production operations with ESP.

Rupture disk

Among the current trap annular pressure mitigation techniques to prevent annular pres-sure build-up, engineered rupture disks are designed to vent annular pressure in excess to protect outer or inner strings. WELLCAT multi-string module allows users to specify the location of rupture disk in the well mechanical configuration, verify survival initial conditions and solve annuli pressure and volume change due to disk failure.

Wellhead-movement progressive failure analysis

Wellhead-movement progressive-failure analysis enables a user to obtain axial loads and contact forces of the entire system once the hanger rating is exceeded. The WELLCAT software will distribute the loads through the system once the hanger ratings are exceeded, and only stop reporting once the rating equals the loading condition. The VIT and Progressive-Failure Analysis features are licensed separately to be used in conjunction with the Production Design, Tube Design, and Multi-string Design modules.