FCL工程纤维在碳酸盐岩裂缝性漏失堵漏中的应用

摘要

裂缝溶洞性漏失是钻井过程中面临的一个严重问题,最常见的处理措施是泵注高浓度的LCM堵漏浆FCL工程纤维是新研发出的一种纤维材料,平均直径为10～20 μm,长度在8～12mm之间可调,使用浓度一般为0.8％～1.0％,抗温大于170℃.讨论了FCL工程纤维的作用机理,对FCL纤维堵漏浆的堵漏效果进行了实验评价.FCL工程纤维承压堵漏技术在西部海相碳酸盐岩裂缝溶洞性漏层应用了11口井,成功封堵9口井,成功率大于81％.FCL工程纤维复合承压堵漏技术的成功应用为碳酸盐岩裂缝溶洞性漏失提供了一种有效的解决方案.%The lost circulation in fractured and cavernous formations is controlled normally by high concentration LCM sealing mud. The engineering fiber FCL is a kind of novel fiber material, which the average diameter is 10 μm-20 μm, the length is 8 mm-12 mm, the concentration is 0.8%-1.0%, and it can be used at 170 °C. The active mechanism and sealing effect evaluation experiments of FCL fiber are developed in this paper, and it is applied in 11 wells, 9 of that are successful, whichrnthe success rate is over 81%.