Synthesis, Characterization, and Performance Evaluation of Starch-Based Degradable Temporary Plugging Agent for Environmentally Friendly Drilling Fluid

Abstract Reservoir protection in well drilling and completion is one of the most significant challenges that have been connected with quality temporary plugging zone recovery value reservoir permeability when foreign water invaded into copied agents. The regular agents are linked high demand for matching rate about pore throat formation, effect a single, poor environmental performance, etc. which markedly impact operational efficiency. This work reports synthesis characteristic starch-based degradable water-absorbent resin to protect layer during drilling. Both excellent SDTA through introducing nanometre calcium carbonate composites used as rigid core were synthesized, characterized, revalued standard methods. After purification, there some groups including carboxylic acid group, amide methyl S=O reflected successful monomers. displayed remarkable salt resistance 5% 0.5% thermal stability 130°C degradation 50%, respectively. Results also demonstrated could make mud cake structure more compact exhibit self-adaptive formation. SEM images treated revealed mechanism be base on collaborative action holes form an impressive filter effectively avert molecules invasion reservoir. Hence, suitable material agent completion.