drilling knowledge: low ph water-based polymer mud (mud phpa)

drilling knowledge: low ph water-based polymer mud (mud phpa)
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  • Can you drill cement with PHPA mud?
  • Do not drill cement with PHPA muds, unless the system will be replaced after drilling out, because PHPA muds are sensitive to high pH, especially in the presence of high calcium levels. If drilling cement with a PHPA system is unavoidable, pretreat the system with 0.251bmlbbl [0.7 kg/m3] sodium bicarbonate.
  • What is the technology of PHPA mud systems?
  • Although more is known from field applications about how practices, although more is known from field applications about how the products work and the systems behave, the technology of PHPA mud systems is still developing. Drilling of oil and gas wells always results in the incorporation of native clays into the mud system.
  • Are PHPA MUDs better than water based mud?
  • The average progress for the drilled wells was 285 ftlD [87 mId] with water-based muds; 300 ft/D [91 mJd] with the oil-based mud; and 510 ftlD [ISS mId] with PHPA muds. On the basis of these group averages and the actual savings in total drilling costs, the improvement from the use of PHPA muds was considered exceptional.
  • Does pH affect mud rheology and filtration properties?
  • The obtained results confirmed the significant effect of the pH on the mud rheological and filtration properties. The reason for that is the change in mud rheology revealed that the nanostructure changes for the plates and particle surfaces of the drilling fluid based on the new value of the pH.