TY -的A2 Davarpanah Afshin AU - Tan,天翼盟——张、回族非盟- Ma, Xusheng AU - Chen Yufei PY - 2021 DA - 2021/11/26 TI -研究Surge-Swab压力考虑削减的影响插入页岩钻井SP - 9446293六世- 2021 AB -页岩钻井井筒不稳定是一个频繁的问题。准确计算surge-swab起下钻过程中压力对井筒压力管理保持井眼稳定至关重要。然而,减少插头形成页岩水平井没有被认为是在以前surge-swab压力模型。摘要surge-swab压力模型考虑削减插头的影响建立了开管柱和关闭管柱条件;在这个模型中,切割的渗透压塞进行了分析。削减堵塞孔隙度的减少由于页岩水化膨胀和分散,最终导致一个不透水插头。一个案例研究分析拭子进行压力脱开的过程。结果表明,在一个封闭的管道状况,减少插头显著增加下面的拭子压力,增加与减少切塞孔隙度和切塞长度的增加。给条件下,井底部的拭子压力从3.60 MPa提高到8.82 MPa由于切塞,增加了244.9%。在一个开放的管柱条件,减少堵塞影响管道中的流速和环,导致更高的拭子压力高于切塞而不得采伐塞环。 The difference increases with the decrease of the porosity and the increase of the length and the measured depth of the cutting plug. Consequently, the extra surge-swab pressures caused by cutting plugs could result in wellbore pressures out of safety mud density window, whereas are ignored by previous models. The model proposes a more accurate wellbore pressure prediction and guarantees the wellbore stability in shale drilling. SN - 1468-8115 UR - https://doi.org/10.1155/2021/9446293 DO - 10.1155/2021/9446293 JF - Geofluids PB - Hindawi KW - ER -