塔河油田超深井坍塌治理工艺探索与实践

塔河油田地质构造特殊,奥陶系以裸眼完井为主,部分泥岩段和灰岩产段暴露.近年来井壁坍塌故障井较多,为此开展了广泛研究和现场实践.该文重点针对坍塌治理技术进行了系统总结,分轻度坍塌、重度坍塌、重复坍塌和复合性综合事故,给出相应的治理对策,重点给出适应性的钻具组合、研磨工具和钻磨参数,并对作业中要点进行描述.

Countermeasures for collapse in super-deep wells in Tahe Oilfield

Due to the special geological structure in the Tahe Oilfield, most of the Ordovician wells are in open-hole completion, and parts of the mudstone and limestone production layers are exposed. Well collapses are common in the recent years, in view of which, many studies and field practices have been carried out. This paper mainly aimed at the countermeasures for collapse, and classified them into mild, severe, repeat ones and compound comprehensive accident. Corresponding countermeasures were given, especially assembly tools, drill grinding, grinding parameters in operation.