摘要
普光2井是目前国内最深的密闭取心井。该井目的层埋藏深、地层破碎、孔隙度大、压力高、气层含H2S浓度高、井底温度高、循环压力大、裸眼段长、施工难度大。通过工具优选、参数优化、钻井液、密闭液体系优选及强化技术措施,取心收获率83.68%,密闭率95.15%,为以后深井密闭取心提供了经验。
Sealing core drill operation can protect the core by using closed fluid to avoid pollution and soak by drilling fluids, and obtained geologic information can really reflect the formation characteristics. At present, well Puguang 2 is the deepest well in sealing core drill in China. During sealing core drill operation, there are some technology difficulty existence, such as high formation pressure, high density H_2S, high temperature in bottom hole, high circulation pressure, long open interval, etc. Through adopting corresponding technique measures, sealing core drill operation is finished successfully in well Puguang 2.
出处
《钻采工艺》
CAS
北大核心
2006年第3期28-30,共3页
Drilling & Production Technology
关键词
密闭取心钻井
深井
地层岩性
取心收获率
普光2井
sealing core drill, deep well, formation lithology, core recovery, Well puguang 2
