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Bridging Particles Optimization Tool

The Bridging Particles Optimization Tool (BPOT) is proprietary software that calculates the optimum blending proportion of two or more bridging agents. The ideal packing bridging technique allows software calculations to optimize particle size distribution for any given formation.

Optimizing the bridging solids provides several advantages for the drill-in and other drilling fluid systems:

  • Rheological properties such as plastic viscosity, gel strength and yield point can be easily controlled.
  • Controlling and lowering the Equivalent Circulating Density (ECD) helps prevent lost circulation in depleted and fractured reservoirs.
  • Low solids systems provide higher quality thin mud cakes that are beneficial for slim wellbore drilling.
  • Low fluid loss minimizes fluid invasion in reservoir formations, which therefore minimizes the possibility of formation damage.
     

Features & Applications

EMEC’s BPOT database provides a wide range of particle size distribution (PSD) datasets. This allows the program to provide the best optimum blend of bridging particles, which can tightly seal a reservoir formation. 

The program inputs use pore sizing from thin section analysis or actual core analysis, pore size radii analysis and permeability information. The square root of the permeability in mD can be used as a rough guide to the median or average pore size of any given formation.

The first step in the process of forming a seal is to define the worst-case scenario based on the largest dominant pore size or fracture width. Once this is established, the ideal packing theory (known as the D½ rule), is applied.

Via a simulation process, the program selects the optimum blend from the available material set, where the particle-size-distribution line of the bridging material should closly match the slope of the optimum line for this formation. With known total bridging material concentration, the program will generate an output of the bridging material blend with percentage and concentration for each bridging product.

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