Production trends in the carbonate reservoir systems vary due to a wide array of complexities: substantial reservoir heterogeneity produced fluid type, fluid driving mechanism and other factors that affect hydrocarbon flow through the reservoir to the well bore. Due to these complexities, stimulation techniques achieving diversion to increase the coverage are inculcated to optimize the production and recovery.

The paper provides case study of the offshore Bombay High Oil Field carbonate reservoir with multilayered lithology which possesses a permeability range of 5–500mD, temperatures that reach 116°C and an interval length of 26m perforating three pay zones, characterized by dual porosity and permeability, vugs and open fractures of varying apertures affecting the flow type and increased maturity of the fields causing a decrease in the reservoir pressure which gradually declined the well's productivity affecting recovery optimization.

Significant multiphase acid stimulation was designed with Viscoelastic Diverting Acid (VDA) technique for higher injecting rate operations based on rheological behavior in accordance with the complex porosity/permeability profile obtained by LWD measurements and images. The paper includes the pre- and post- Viscoelastic Diverting Acid treatment plots of the field along with the production performance data with Productivity Indices (PI) of the well calculated showing consequential results in the reservoir performances in affect with the stimulation.

The objective of the paper is to compare the percentage change in pre- and post- stimulated performance of the well covering the lithological complexities of the field, design and post treatment evaluation and showcase other critical areas of acid stimulation In multilayered well.

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