顺北油田新型井身结构配套钻井液技术研究与应用

针对顺北油田二叠系多漏层易漏失、志留系井壁失稳、桑塔木组火成岩坍塌应力高、深井小井眼定向携岩困难等技术难题，推行侵入体“专打专封”新型井身结构。通过室内实验，优选聚胺、高软化点沥青、磺酸盐共聚物等处理剂，引入甲胺基强抑制强封堵防塌钻井液和成膜随钻堵漏钻井液技术，并应用堵漏浆钻进解决二叠系纵向裂缝难题。通过5口井现场实验，成功解决该区块多项技术难题，形成了一套适用于顺北油田配套钻井液工艺技术，满足新型井身结构钻进需要。

Research and application of drilling fluid suitable for new well bore structure in the Shunbei oil field

In the Shunbei oil field, leakage often took place in Permian, well bores are instable in Silurian, collapse stress is high in the Sangtamu Formation, and it is difficult to carry debris directionally in deep and slim holes. A new well bore structure with special intrusion for sealing is proposed. Through laboratory experiments, we choose polyethylene amine, high softening point asphalt, sulphonate copolymer treating agent such as methy-lamine, and introduce methylamino drilling fluid and filming technique, to deal with longitudinal cracks in Permian. Field applications were made in 5 wells, and proved successful. A set of suitable drilling fluid technology has been developed to meet the needs of new well structure.