168095 – First Application of Limited Entry Multistage Matrix Acidizing in Saudi Arabia’s Deep Gas Development Program – A Case Study for Improved Acid Stimulation and Placement Techniques


Due to the complexity of the Permian Khuff-C carbonate reservoir in Saudi Arabia, each well requires individual assessment to determine the optimum completion design necessary to achieve an efficient matrix and/or fracture acidizing treatment. This paper presents an overview of Saudi Aramco’s efforts to evaluate the stimulation techniques used in the Khuff-C reservoir and highlights an optimal development/completion strategy for certain reservoir conditions via the successful application of a limited entry openhole multistage completion for effective stimulation. The technique uses a system that is designed to run as part of the production liner and provides mechanical diversion at specified intervals, thereby allowing multiple matrix acidizing treatments to be effectively placed in the target zones.