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Abstract Casing deformation in shale gas wells poses a significant challenge to hydraulic fracturing operations, often leading to reduced efficiency and effectiveness in reservoir stimulation. This paper aims to enhance the transformation effects of hydraulic fracturing in wells afflicted by casing deformation through the introduction of novel techniques and materials. We present an integrated approach that includes the deployment of high expansion dissolvable plug tailored for restricted diameters, the use of spiral seal structures to ensure reliable anchoring within deformed wellbore sections. Finite element analysis and field trials are conducted to evaluate the performance of these solutions under varying downhole conditions. The outcomes demonstrate substantial improvements in the delivery and sustainability of fracturing pressures, leading to increased stimulated reservoir volumes and optimized hydrocarbon recovery rates. These results suggest that adopting such specialized interventions can significantly counteract the limitations imposed by casing deformations, thereby reviving the productivity of compromised wells and extending their operational lifespan.
Zhang et al. (Tue,) studied this question.
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