塔河油田部分地区二叠系火成岩易坍塌,易漏,地层孔隙压力通常在1.1-1.15g/cm3范围,正常钻进时钻井液密度一般为1.2-1.3g/cm3,一般增强钻井液的封堵能力可以安全钻过该地层,但是部分地区的二叠系火成岩裂缝发育较好,联通,在钻进过程还是会发生井漏,有些地区钻进时不漏,但在后续施工中发生了较多的井漏。本文通过对二叠系漏失原因分析和堵漏方式的对比分析,提出了采用FCL纤维复合承压堵漏技术,并在现场应用中取得了良好的效果。 Permian igneous rocks tend to collapse and leak easily in some areas of Tahe Oilfield. The pore pressure of formation is usually in the range of 1.1-1.15g / cm3. The drilling fluid density is generally 1.2-1.3g / cm3 during normal drilling, generally increasing the seal of drilling fluid However, in some areas, the Permian igneous rocks have well developed fractures and China Unicom will still have some leakage during drilling. In some areas, there is no leakage during drilling, but in subsequent construction, Lost well. Based on the analysis of the cause of leakage and the comparison of plugging modes in Permian, this paper puts forward the use of FCL composite pressure sealing technology, and has achieved good results in field application.