内管超前绳索取心技术在松散沉积物调查中的应用

Application of wire‑line inner‑tube advance coring technology in loose sediment investigation

松散沉积物是覆盖层的主要物质存在形式,是推动绿色发展、建设生态文明的主要研究对象。随着研究内容的不断丰富,对覆盖层调查的深度与精度不断提高,能否实现对松散沉积物的精准、原位无污染取样是制约后续研究的关键要素之一。本文基于锡林郭勒盟-通辽地区钻探调查实践,将绳索取心钻进工艺、超前取心技术与成膜护壁冲洗液技术相结合,提高孔壁稳定性和松散岩心完整性,解决制约厚覆盖层调查钻探取样技术难点,可为相关领域松散沉积物调查提供技术借鉴。

Loose sediment is the main material form of overburden,which is the main research object to promote green development and build ecological civilization.With the continuous enrichment of research content,the depth and accuracy in overburden survey are constantly increasing.Whether the accurate and in‑situ pollution‑free sampling of loose sediments can be realized is one of the key factors restricting the follow‑up research.Based on the drilling survey practice in the Xilin Gol League-Tongliao area,this paper combines wire‑line coring drilling technology and advance coring technology with film‑forming wall protection drilling fluid technology to improve the stability of hole wall and the integrity of loose core so as to solve the technical difficulties restricting the drilling sampling of thick overburden,and provide technical support for loose sediment survey in related fields.