油水平井水力喷射填砂压裂工艺应用

Application of Hydraulic Jet Sand-packed Fracturing to Horizontal Wells

水平井体积压裂施工多采用油管传输水力喷射带底封拖动压裂工艺,该工艺在现场实施中存在施工效率低、卡钻、遇阻等施工异常。为寻找更安全可靠的水平井压裂施工方式,开展了常规油管传输水力喷射填砂压裂工艺技术研究与实验。通过对填砂压裂技术原理和特点的分析以及开展现场实验,证明水力喷射填砂压裂技术是可行的,填砂封堵可替代封隔器作用,实现层间有效封隔。且通过现场实验表明套管环空填砂方式操作安全,施工效率更为高效。

Tubing conveyed hydraulic jet with seal drag, as one technology of stimulated reservoir volume fracturing, is often used for horizontal wells. However, there are many problems during its site use, including low efficiency, sticking, and blockage. So, in order to find out safer and more reliable fracturing way for horizontal wells, we carried out the study and experiment on tubing conveyed hydraulic jet sand-packed fracturing. Results show that the hydraulic jet sand-packed fracturing is feasible because sand-packed sealing may substitute packer to realize an effective packoff between intervals. In addition, it is demonstrated from field test that the mode of casing annular sand-packed is featured by safety operation, and high efficiency.