Successful matrix acidizing for extremely thick carbonate reservoirs with long horizontal well sections and strong heterogeneity requires efficient temporary plugging diverting of acid fluid, ensuring fluid distribution to each production layer. Foamed-viscoelastic-surfactant (Foamed-VES) combines the benefits both foam viscoelastic surfactant (VES) acid, integrating viscous plugging. It can ac...

A new staged acid corrosion inhibition (ACI) concept, utilising polymerisable ACIs, has been developed to minimise the of coiled tubing and wellbore casing materials during matrix acidizing operations. The concept evaluated using a customised once-through flow cell 4 molar hydrochloric at 80 °C. high quality, protective inhibitor film is established an elevated ACI concentration test period 0–1...

Abstract In this work, an experiment-based rheological model that accounts for the influence of polymer concentration, shear-thinning behavior, and temperature variation on in-situ viscosity gelled acid is developed. On basis model, we present a thermal–hydrologic–chemical coupled describes dissolution process carbonate acidization with acid. A sensitivity analysis dynamic regarding variation, ...

Matrix acidizing is widely used to enhance oil/gas production in the exploitation of carbonate reservoirs. In this work, a three-dimensional (3D) hydro-chemical-thermal (H-C-T)-coupled model was presented improve understanding process. The influence different influencing factors analyzed, especially coupling effect natural fractures and situ stress. With increase acid injection concentration, m...