ABSTRACT
Depending on the prevailing temperature and pressure conditions, any of the big five solids can precipitate or form and eventually deposit either in the pore space (subsurface) and/or in the flow infrastructure past the wellhead. Clearly, these potential obstructions result in what is known as wellbore “skin” or increased pressure drops in the rest of the pipe flow. Primarily, these are the topics covered in this chapter beginning with Darcy’s law containing the skin term, its derivation, and productivity index. The chapter concludes with notable case studies on deposits in wellbore/production tubing and surface facilities.
