Testing

BlendingFluid LossThickening TimeStatic Gel Test

Overview

  • ALTCem has a state-of-the-art lab located in Cheyenne, WY
  • Testing equipment is computer controlled and monitored, providing precise and rapid results
  • Tests include thickening time, compressive strengths, fluid loss, static gel strength, free water, settling and rheologies

Thickening Time

  • Thickening time is an API test that is used to measure the amount of time a cement slurry remains pumpable
  • Downhole circulating temperature and pressures are considered and testing schedules are developed to simulate the well
  • Once a slurry has reached 70 bc (bearden units) it is consider unpumpable by API standards
  • Slurries may be tested in an HPHT or Atmospheric consistometer depending on downhole conditions

Compressive Strength

  • Compressive strengths are used to determine the set time and the strength of cement in downhole conditions
  • ALTCem uses both ultrasonic compressive strength analyzers along with destructive testing
  • Downhole conditions are utilized based on API recommendations to accurately define the strength of cement

Static Gel Strength

  • Static gel strength is utilized to determine potential to gas flow once a cement slurry has stopped moving
  • API recommends dynamic testing of static gel strength rather than ultrasonic
  • ALTCem utilizes the latest in dynamic static gel strength testing apparatus

Fluid Loss

  • API fluid loss is critical to determine a cement slurry’s propensity to leak off water
  • Especially critical while cement is across higher permeability zones or being pumped with limited flow path such as through liner hangers
  • ALTCem utilizes heated static fluid loss cells as per API Spec 10B guidelines

Free Water

  • API free water is used to determine the separation of cement during static conditions
  • Settling may also be determined statically during this test
  • Testing is done at downhole temperatures and is adjusted depending on the deviation of the well

Rheologies

  • Atmospheric viscometers are utilized to determine rheologies of fluids
  • ALTCem utilizes both automated and manual viscometers
  • Rheologies are critical to cement modeling and determining frictional pressures during pumping operations
  • Rheologies are also utilized to test the compatibility between fluid systems