The Fundamental Principles and Standard Evaluation for Fluid Loss and Possible Extensions of Test Methodology to Assess Consequences for Formation Damage

Industry testing procedures such as ANSI/API 13B-1 describe a method for measuring fluid loss and studying filter-cake formation against medium of either filter paper or porous disc, without giving information about potential damage. Considering the thickness discs, it may also be possible to extend gain an insight into aspects A new experimental set-up methodology was created evaluate changes discs after HTHP generate signs damage, in disc mass permeability. Such measurements were enabled by placing cell, which allowed reverse flow lift off filter-cake. Experiments conducted with different drilling compositions use methodology. The first test series showed consistent function additives applied fluid. data yield insights how are sealed degree solids, fibers polymers entering discs. second tests set up procedure measure disc’s permeability air water. results that there positive correlation between conclusions enable identifying damage further studies should optimize method.