Non-Permeable Plugging Agent is designed to enhance wellbore stability by forming a low-permeability barrier on the formation face, minimizing fluid filtration and preventing formation damage. It is compatible with both water-based (WBM) and oil/synthetic-based (OBM/SBM) drilling fluids, making it a versatile solution for reservoir protection and lost circulation control.

Technical Features & Advantages

Superior Sealing Performance: Non-Permeable Plugging Agent rapidly forms a dense, impermeable seal in porous and micro-fractured formations, significantly reducing fluid loss and solids invasion.

Broad Fluid Compatibility: Effective in WBM, OBM, and SBM systems without compromising rheological stability.

High-Temperature Resistance: Stable under high-pressure/high-temperature (HPHT) conditions, withstanding temperatures up to 180°C (356°F).

Reservoir Protection: Minimizes formation damage by preventing drilling fluid filtrate penetration, preserving near-wellbore permeability.

Synergistic with LCMs: Can be combined with other lost circulation materials (LCMs) for enhanced sealing in severe loss scenarios.

Application Guidelines

General Usage

Recommended Dosage:

Preventive Sealing (Micro-Fractures/Permeable Zones): 1.0–3.0% by weight of drilling fluid.

Reservoir Protection (While Drilling): 1.0–2.0% by weight.

Severe Loss Control: Increase dosage as needed (typically 3.0–5.0%), combined with bridging agents (e.g., calcium carbonate, graphite).

Mixing Procedure

For WBM: Pre-hydrate ME-NEP in fresh water (5–10 minutes) before adding to the mud system to ensure uniform dispersion.

For OBM/SBM: Pre-mix with base oil or a wetting agent to improve compatibility.

For Severe Losses: Conduct lab pilot tests to optimize LCM combinations before field application.

Operational Notes

After Loss Stops: Use shale shakers to remove wellbore strengthening debris (WSD) to avoid overloading the mud system.

HPHT Wells: Monitor fluid properties closely due to potential thermal thinning; adjust concentrations as needed.

Quality Assurance & Storage

Shelf Life: 24 months in dry, cool conditions (<30°C).

Packaging: 25 kg multi-layer moisture-proof bags or customized bulk options.

ME-NEP is a cost-efficient, environmentally compliant solution for mitigating formation damage and improving drilling efficiency. For optimal results, field-specific testing is recommended prior to full-scale deployment.