CAJ | 학술논문

针对泡沫钻井井壁失稳问题，优选了硅酸钾/聚乙烯醇作为抑制剂。通过泥页岩自吸、抑制膨润土造浆、滚动回收和硬度测试等实验，评价了其抑制性能。实验结果表明硅酸钾/聚乙烯醇具有良好的抑制特性。借助XRD分析，研究了硅酸钾/聚乙烯醇的强抑制作用机理。研究表明，硅酸钾/聚乙烯醇对泥页岩的强抑制性来源于硅酸钾与聚乙烯醇两者相协同作用的结果，其中封堵性与成膜性是其维持井壁稳定的主要因素。
침대포말찬정정벽실은문제，우선료규산갑/취을희순작위억제제。통과니혈암자흡、억제팽윤토조장、곤동회수화경도측시등실험，평개료기억제성능。실험결과표명규산갑/취을희순구유량호적억제특성。차조XRD분석，연구료규산갑/취을희순적강억제작용궤리。연구표명，규산갑/취을희순대니혈암적강억제성래원우규산갑여취을희순량자상협동작용적결과，기중봉도성여성막성시기유지정벽은정적주요인소。
Potassium silicate/polyvinyl alcohol inhibitor was selected to protect the borehole instability in foam drilling ,and its inhibitive properties were evaluated by means of shale self-priming experiment ,mud-making inhibition of bentonite ,rolling recovery experiment and hard-ness test . The results indicate that potassium silicate/polyvinyl alcohol has a good inhibitive properties .Finally ,the inhibition mechanism of the inhibitor was studied by XRD .The results showed that the strong inhibition of potassium silicate/polyvinyl alcohol to the shale is derived from the synergies of potassium silicate and polyvinyl alcohol ,in which sealing property and film-forming ability are the major factors to maintain borehole stability .