BlockSEAL Simulated Sand Plugging Technology

n  Technical Introduction

    BlockSEAL simulated sand plugging technology is an efficient drilling solution utilizing graded slug particles shaped like wedges. Employing a controlled filtration plugging slurry system, it adapts to varying formation fracture widths by adjusting the total filtration time and coordinating the design of slug volume. This approach facilitates "simulated sand plugging" - "induced sand plugging" - "forced sand plugging" sequences within the fracture, enhancing plugging success and formation pressure bearing capacity.

n  Technical Features

    ( 1 ) Tailored plugging slurry formulation prevents long-term retention of drilling fluid plugging slurry in cracks.

    ( 2 ) Real-time adjustment of plugging slurry filtration loss based on on-site leakage conditions.

    ( 3 ) Single slurry mixing addresses plugging of cracks of different sizes.

    ( 4 )Wedge-shaped slug particles facilitate entry into induced cracks.

    ( 5 )Design of graded plugging slurry volume maximizes suitability for formation fractures.

    ( 6 )Achieves one-time sealing from simulated to induced to forced sand plugging.

    ( 7 )Inert material compatible with water-based and oil-based drilling fluids.

    ( 8 )High-pressure deformation ability of inducer prevents door sealing.

    ( 9 )Plugging agent contains high-pressure elastic material to support and maintain fracture opening.

    ( 10 )Forms solid barrier in induced cracks with high shear resistance.

n  Application

    Successfully applied in numerous oilfields of CNOOC, PetroChina, and Sinopec, achieving a one-time plugging success rate exceeding 80%. Effectively addresses repeated loss in multiple wells and demonstrates significant success in pressure lifting and fault loss return. Positive field feedback attests to its efficacy.