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Impairment Control

Discover the advancements in understanding impairment control in drilling fluids, including invasion of particles, pore structure impact, and modeling polymer effects. Learn about innovative tools and models developed for field applications.

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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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