Single-Well Simulation for Horizontal Wells in Fractured Gas Condensate Reservoirs

Area of Science:

• Petroleum Engineering
• Reservoir Engineering
• Geoscience

Background:

• Fractured gas condensate reservoirs (FGCR) are crucial but challenging to develop, especially with horizontal wells.
• Existing models struggle with retrograde condensation and fracture complexities near horizontal wells.

Purpose of the Study:

• To develop a novel semianalytical model for horizontal wells in FGCR.
• To incorporate natural fractures, multiphase flow, and stress sensitivity into the model.
• To accurately represent fluid distribution and pressure response in the near-wellbore region.

Main Methods:

• A dual-porosity model for fractured reservoirs.
• A four-region radial composite model for multiphase flow.
• Application of pseudopressure, Pedrosa, Laplace, and Finite Cosine transforms.
• Verification against numerical solutions (CMG) and field data.

Main Results:

• The proposed semianalytical model accurately predicts pressure responses in FGCR.
• Identified 12 distinct flow regimes, aiding in physical interpretation.
• Developed a method to assess retrograde condensation extent and region size.

Conclusions:

• The novel semianalytical model provides a reliable tool for FGCR development with horizontal wells.
• The model enhances understanding of fluid behavior and aids in production optimization.
• Validation with Bohai field data confirms the model's practical applicability.