Investigation into the mechanism of damage removal in the compaction zone using dynamic negative pressure perforation
Abstract
Conventional perforation often leads to the formation of a compacted zone around the perforation tunnel, severely impairing near-wellbore permeability and well productivity. This study focuses on Dynamic Negative Pressure Perforation (DNPP) as a solution to effectively remove this damage. We first established a mathematical model to characterize downhole pressure transients during DNPP. Subsequently, a 3D fluid-solid coupled numerical model was developed to simulate the cleanup process of the compacted zone. Through orthogonal experiments and stepwise regression analysis, we identified the key controlling factors and constructed a predictive model for cleanup efficiency. The results show that DNPP can significantly enhance the flow capacity of perforation channels by efficiently clearing the compacted debris. The maximum dynamic negative pressure, initial static negative pressure, rock cohesion, and internal friction angle are the dominant parameters determining the cleanup outcome. This work provides a mechanistic understanding and a practical predictive tool for optimizing DNPP design to improve well performance.
Read the paper
Related studies
- A Survey on Knowledge Graphs: Representation, Acquisition, and Applications
- Toxicity of nanomaterials
- The Human Gene Mutation Database: towards a comprehensive repository of inherited mutation data for medical research, genetic diagnosis and next-generation sequencing studies
- Halogen bonding (X‐bonding): A biological perspective
- Biofilm formation at the air–liquid interface by the Pseudomonas fluorescens SBW25 wrinkly spreader requires an acetylated form of cellulose
- Opioid Activation of Toll-Like Receptor 4 Contributes to Drug Reinforcement
Go deeper in Evidence Hub
Evidence Hub adds a study data sheet (design, sample size, evidence level, key numbers), an AI summary and a chat grounded in the paper's text.