杭锦旗地区裂缝性漏失钻井堵漏技术研究与应用

Research and application of plugging technology for fracture type leakage in the Hangjinqi area

摘要:

杭锦旗区块在原生构造裂缝及工程诱导缝作用下，井漏问题突出，常规静止堵漏、桥接堵漏等效果差。基于“纤维架桥、填充驻留、胶结固化”原理，优选纤维及优化长度配比，漂珠、微硅和油井水泥进行粒径级配，调控固化体膨胀、稠化、韧性等性能，完成了堵漏浆开发；配套堵漏设计方法、过程控制措施等，形成适用于杭锦旗区块裂缝性井漏的堵漏工艺。现场应用232井次，一次堵漏成功率93.5%，显著提高了钻井效率，对其它地区裂缝性井漏具有参考意义。

关键词:裂缝性漏失;钻井堵漏;油井水泥;堵漏浆

Abstract:

Under the action of primary structural fractures and drilling induced fractures, well leakage is prominent in the Hangjinqi block, and conventional static plugging or bridge plugging is not effective. Based on the principle of “fiber bridging, filling up and standstill, cementing and curing”, a leak plugging slurry was developed through optimization of fibers and their length make-up ratio, sizing of floating beads and micro-silicon, and cement, and conditioning of expansion, thickening and toughness of the solidified solids. The plugging design method and process control measures were adopted to form a leak plugging technology suitable for fracture type leakage in Hangjinqi block. It has been used in 162 wells in the field and the success rate of one-time plugging is 93.7%, which can significantly improve drilling efficiency. It can also provide some reference for fracture type lost circulation in other areas.

Key words:fracture leakage; plugging; oil well cement; plugging slurry