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Impairment Control

Impairment Control . Historically Abrams et al 1/3 –1/7 rule external bridging versus internal cake concentration aspects: 5% solids poor match with pore size and permeability no understanding of spurt loss. Impairment Control. New Insights: Sharma et al

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Impairment Control

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  1. Impairment Control • Historically Abrams et al • 1/3 –1/7 rule • external bridging versus internal cake • concentration aspects: 5% solids • poor match with pore size and permeability • no understanding of spurt loss

  2. Impairment Control • New Insights: Sharma et al • invasion of particles impact pore structure • adequate description of change in pore properties • flow back of particles modeled • relative perm effects modeled • polymers described as solids

  3. Impairment Control • Work done so far: • extensive coreflush testing for measuring factors controlling filtration process • validation of impairment prediction models • matching model results with field data • development of practical field tool

  4. Particle Sizes in Drilling Fluids • Initial Design

  5. PSD of Drilled Solids in Mud • At TD after 2 days of drilling

  6. Available Software • Op-ti Bridge (through MI via BP) • Sharma’s Model • DIF design (bridging agent) • Acid Wash program

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