POROSEAL Filtration-Control Sealing Additive | Schlumberger
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POROSEAL

Copolymeric filtration-control sealing additive

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POROSEAL copolymeric filtration-control sealing additive provides permeability plugging to effectively seal shales and filtercakes, improving the performance of highly inhibitive water-based drilling fluids. It is effective for low- and high-temperature applications.

Typical Physical Properties
Physical appearance White liquid
Specific gravity 1.0–1.1
Boiling point 212 degF [100 degC]

Applications

POROSEAL additive should be added at 2%–5% by volume in the initial formulation or as a treatment to an active system. Pilot testing prior to use is recommended to determine any effects on the system properties.

The performance of POROSEAL additive improves with salinity and can be used to improve both the wellbore stability and fluid-loss performance of highly inhibitive water-based fluids.

POROSEAL additive is compatible with conventional WBM as well as high-performance fluids, including

Advantages

  • Permeability plugging to aid in sealing shales and low-permeability sand formations
  • Additional fluid loss control at temperatures in excess of 400 degF [204 degC]
  • Biocide agent not required

Limitations

  • For use only in water-based drilling fluid

Toxicity and handling

Bioassay information is available upon request. Handle as an industrial chemical, wearing protective equipment and observing the precautions described in the safety data sheet.

Packaging and storage

POROSEAL additive is available in 55-galUS [208-L] drums. Store in a dry, well-ventilated area. Store at temperatures between 40 and 110 degF [4.4 and 43.3 degC]. Bacterial growth may occur with long-term storage. Keep container closed. Keep away from heat, sparks, and flames. Store away from incompatibles. Follow safe warehousing practices regarding palletizing, banding, shrink-wrapping, and stacking.

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Tech Report Kuwait Oil Company Drills Through Challenging Shale Sections in Record 11 Days

Water-base mud with KLA-STOP and POROSEAL additives delivers high drilling performance while meeting environmental regulations.

Case Study Saudi Arabia: KLA-SHIELD/POROSEAL Tandem Records Zero NPT in Troublesome Well, Exceeds Operator Objectives

Historically, the operator employed a standard KCl/polymer/asphalt mud system to drill the 12 in. hole section.

Case Study ULTRADRIL and POROSEAL Systems Mitigate Problematic Nahr Umr Shale Offshore Abu Dhabi

8 1/2-in interval drilled through the Nahr Umr shale interval after the mud weight was increased from 10.5 to 11.0 lbm/galUS.

Case Study ULTRADRIL with POROSEAL

The Offshore Black Sea area is well known for drilling difficulties like wellbore instability, bit balling and tight hole while tripping, caused by the highly reactive shale formation.

Case Study KLA-SHIELD System Enhanced with New Sealant Successfully Debuts in Saudi Arabia, Drilling Problem Shales

M-I SWACO proposed the KLA-SHIELD High Performance Water Based Mud System, incorporating KLASTOP as the primary inhibitor, and the new POROSEAL sealant additive.

Product Sheet POROSEAL Copolymeric Filtration-Control Sealing Additive

Provides permeability plugging to effectively seal shales and filtercakes.

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