LW-OWC
Lightweight Well Cement Systems
Reduced-density well cement systems using extenders (microspheres, perlite, bentonite blends and similar) to limit hydrostatic pressure on weak formations while maintaining set integrity.
Application
Primary cementing across weak, fractured or lost-circulation-prone zones where standard Class G density (~1.90 sg slurry) exceeds fracture gradient. Typical slurry densities: ~1.38–1.68 sg depending on extender system. Full lab programme required for compressive strength and rheology.
Technical characteristics (quality certificate)
Typical values as stated on a mill quality certificate (passport) for a standard commercial grade. Actual lot values are confirmed in the COA / TDS for the selected manufacturer.
Slurry density (designed)
Per well design
API RP 10B-2 / field design
Base cement
Class G or programme-specified
API 10A
Lightweight extender
Microspheres / perlite / blended
Field design / TDS
Compressive strength (24 h)
Per lab qualification at design density
API RP 10B-2
Free water (max)
≤ 3.5% (API neat slurry)
API RP 10B-2
Reference profile for orientation. For each supply we confirm grade, origin and certificate data against your specification, well conditions and delivery requirements.
Typical functions
- Hydrostatic pressure reduction
- Weak-zone primary cementing
- Custom density slurry engineering
Product information
- Chemical name
- Lightweight oil-well cement slurry systems
- Formula / class
- LW-OWC
- Appearance
- Base cement powder plus lightweight extender (microspheres, perlite or blended additives) — supplied as system.
- Packaging
- Primarily 1.0 t MKR (FIBC) for base cement; 50 kg bags also available. Extenders in bags or bulk per type.
Lightweight design is not a single product — density, strength and thickening time must be validated for each well. Extender type affects stability and long-term integrity.
In this category
CTR
Cement Retarders
Additives that extend thickening time of oil-well cement slurries. Chemistry class must match temperature, cement type and slurry design.
Open product →FLA
Cement Fluid-Loss Additives
Additives that reduce API fluid loss of oil-well cement slurries to protect formation and maintain slurry properties during placement.
Open product →DSP
Cement Dispersants
Additives that reduce slurry viscosity and improve pumpability of oil-well cement at low water-cement ratios.
Open product →