在钻井和成井过程中,渗透地层的冲洗液漏失现象是最常见的问题。冲洗液漏失可以使环腔中的有效静水压力降低,从而产生更为严重的问题,诸如消耗泥浆、井喷,腐蚀性气流喷出和井管阻卡等现象。流体渗漏到产油带能导致严重的产油量减少和利润下降。当井壁是可渗透岩层且受到压力差的作用时,即出现循环液损失现象。在某些情况 Leakage from the infiltration formation is the most common problem during drilling and well completion. Leakage of flushing fluid can reduce the effective hydrostatic pressure in the annulus, causing more serious problems such as depleted slurries, blowouts, corrosive gas spouts and well tube blocking. Leaking fluid to the payzone can result in severe oil yield reductions and profit declines. Circulating fluid loss occurs when the wellbore is permeable to the formation and subjected to a pressure differential. In some cases