PEN-X Breaker Surfactant Package | SLB


Breaker surfactant package

Schlumberger Oilfield Services


  • Wells with bottomhole temperature below 250 degF [121 degC]
  • Water wetting of nonaqueous filtercake by stripping the oil or synthetic elements from particle components in the filtercake
  • Openhole completions such as barefoot, stand-alone screens, expandable screens, and openhole gravel packs

How it enhances viscosity

PEN-X breaker surfactant package enhances penetration of nonaqueous filtercakes by destabilizing the emulsion around the calcium carbonate or barite particle. Usable by itself in a brine to help disperse a barite-laden oil-based filtercake or it can be added to a VERSA-OUT water-based filtercake breaker system to enhance the cleanup of a calcium carbonate by water wetting the filtercake. PEN-X package can also be added to the FAZE-OUT reversible-system water-based filtercake breaker for improved dispersion and water wetting.

  • Slow-acting water-wetting surfactant and solvent
  • Thorough and uniform destruction of FAZEPRO reversible invert-emulsion reservoir drill-in fluid system or VERSAPRO invert-emulsion reservoir drill-in fluid system filtercakes when used with the D-STRUCTOR organic-acid precursor breaker
  • Controlled removal of a uniform dispersion and water-wetting
  • Can be placed during completion operation
  • Can be mixed at the rig site with rig equipment
  • Avoids an intervention trip

How it works

PEN-X package is used when bottomhole temperature is below 250 degF [121 degC], when a faster reaction is desired, or for more tenacious filtercakes.

Typically used in combination with D-STRUCTOR breaker or a VERSA-OUT breaker system to dissolve the soluble material in the oil- or synthetic-based filtercake, leading to full filtercake dissolution over an extended time and depending on the bottomhole temperature.

If the oil- or synthetic-based filtercake is barite laden, PEN-X package can be used to help pull the oil from the barite particle and help disperse the filtercake.

Recommended usage is 5 to 20% by volume. Use with the D-STRUCTOR breaker. PEN-X package is compatible with seawater, potassium chloride, sodium chloride, calcium chloride, sodium bromide, calcium bromide, sodium formate, and potassium formate.

Toxicity and handling

Bioassay information is available upon request. Handle as an industrial chemical, wearing protective equipment and observing the precautions as described in the material safety datasheet (MSDS).

Packaging and storage

Packaged in 55-galUS drums or cubic-meter totes and is available from all M-I SWACO plant and warehouse locations.

Store in a dry location away from heat or ignition sources, and minimize dust.

Physical Properties
Physical appearance Gold liquid
Specific gravity 1.050–1.080
Flash point 160 degF [71 degC]
Pour point –45 degF [–43 degC]
All specifications are subject to change without notice.
Contact M-I SWACO for a high-temperature formulation of PEN-X package for temperatures exceeding 250 degF [121 degC].