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吉林油田长深区块营城组地层火山熔岩、火山碎屑岩、细砂岩、砂砾岩较发育且储层压力存在较大差异,在长深平2、长深平4等井水平段进行欠平衡钻井施工过程中,多次出现漏失情况,针对这一问题,开展了深层欠平衡水平井防漏及堵漏钻井液技术研究,优选出防漏堵漏钻井液体系,通过现场应用于长深平5井,储层水平段漏失问题得到了有效控制,保证了快速安全钻井施工。
Volcanic lava, volcaniclastic rocks, fine sandstone and conglomerate of the Yingcheng Formation in the Changshen Block, Jilin Oilfield, are relatively developed and there are great differences in reservoir pressure. In the horizontal sections of Changshenping 2 and Changshenping 4, In the course of balanced drilling construction, the situation of leakage occurred many times. In order to solve this problem, the research on the technology of preventing and leaking drilling fluid in deep underbalanced horizontal well was carried out. Ping 5 wells, the reservoir level segment leakage problems have been effectively controlled to ensure rapid and safe drilling construction.