Modeling wellbore pressure with application to multi-stage, acid-stimulation treatment
Estimation of bottomhole pressure during a matrix-acidizing treatment provides
the information needed to accurately determine the evolution of skin factor during and
after the treatment. It could be a very complicated process, especially when compressible
fluids, such as foams, are involved. Existing models for estimating bottomhole pressure
during a matrix-acidizing treatment ignore the volume reduction of compressible fluids
and its effect on the bottomhole pressure.
This research developed a model that uses a unique solution to the mechanical
energy balance equation, to calculate the bottomhole pressure from known surface
measurements during foamed acid stimulation. The model was used to evaluate two
stimulation treatments. Field examples are presented which illustrate the application of
the model to optimize stimulation treatments.
Properly accounting for the flow behavior and tracking the injected volume of
the foam diverter used during the treatment resulted in more reliable and accurate
bottomhole pressure profile.
Advisor:Zhu, Ding; Hill, Dan A.; Schobeiri, Taher
School:Texas A&M University
School Location:USA - Texas
Source Type:Master's Thesis
Keywords:foam acid stimulation
Date of Publication:05/01/0001