Development and Performance Evaluation of a Gel-Based Plugging System for Complex Fractured Formations Using Acrylic...

Area of Science:

• Petroleum Engineering
• Materials Science
• Chemical Engineering

Background:

• Fluid loss in fractured formations is a major challenge in petroleum engineering, increasing costs and risks.
• Traditional lost circulation materials (LCMs) have limitations in addressing diverse fracture sizes in oil reservoirs.

Purpose of the Study:

• To develop a novel gel solidification plugging system using acrylic resin gel particles.
• To optimize the system for fluid loss control and compressive strength improvement in fractured formations.

Main Methods:

• Utilized Box-Behnken design and response surface methodology for optimization.
• Investigated the synergistic interaction of calcium hydroxide, asbestos fibers, and cement.
• Evaluated thermal stability, fluid loss control, and compressive strength under simulated conditions.

Main Results:

• Developed an acrylic resin gel particle with high thermal stability (up to 314 °C).
• Achieved rapid fluid loss control (18-47 s) and high compressive strength (17.5 MPa).
• Demonstrated efficient fracture sealing at 150 °C.

Conclusions:

• The novel gel-based system shows significant promise for overcoming fluid loss challenges in complex fractured formations.
• Acrylic resin gel particles offer a viable solution for enhancing operational efficiency and safety in petroleum engineering.