半潜式平台表层卡套管处理与认识

下套管过程中发生卡套管复杂情况是半潜式钻井平台钻井作业的重大难题之一，半潜式钻井平台作业时，套管若无法下到位，则下一步作业将无法开展，其处理难度及风险远高于固定式钻井平台。此文以南海东部海域恩平区块一起半潜式钻井平台表层?339.7 mm套管从发生卡套管到快速解卡的案例为例，从地层特性、钻井液性能、井身结构方面开展具体分析，并提出了半潜式钻井平台表层压差黏附卡套管的快速处理方法和预防措施，对于后续预防和处理表层压差卡套管具有可靠的借鉴与指导性意义。

Treatment and Recognition of Surface Tubing of Semi-submersible Platform

The complicated situation of tubing during the casing running is one of the major problems in the drilling operation of the semi-submersible drilling platform. During the operation of a semi-submersible drilling platform, if the casing cannot be lowered in place, the next step of the operation will not be carried out. The processing difficulty and risk are much higher than those of the fixed drilling platform. This article took a case of a ?339.7 mm casing on the surface of a semi-submersible drilling platform in the Enping Block in the eastern South China Sea from the occurrence of tubing to the rapid release of the jam as an example. It carried out specific analysis from the aspects of formation characteristics, drilling fluid performance, and well structure, and put forward quick treatment methods and preventive measures for the surface pressure difference of the semi-submersible drilling platform. It has reliable reference and guiding significance for the follow-up prevention and treatment of surface pressure difference tubing.