基于仿生技术的泥页岩井壁稳定处理液研究

发布时间：2018-07-09 12:49

  本文选题：泥页岩 + 井眼稳定　； 参考：《石油钻探技术》2017年03期

【摘要】：为解决气体钻井钻遇地层出水引发的泥页岩井壁失稳问题,根据植物叶面的"荷叶效应",优选了仿生处理剂,研制了泥页岩仿生处理液,并进行了室内性能评价试验。试验结果表明,该仿生处理液能有效降低泥页岩表面的表面能,形成类似于荷叶或芋叶表面的微米—纳米突起结构,实现泥页岩表面从亲水向疏水转变(清水接触角大于120°),从而达到阻止泥页岩自吸水的作用,提高泥页岩在水溶液中的强度,维持泥页岩井壁稳定;同时,该仿生处理液形成的疏水表面具有一定耐磨性和热稳定性,不受地层水矿化度的影响,适用于中性或碱性条件,但地层温度不宜高于80℃。研究表明,利用仿生学原理,通过控制泥页岩的自吸水作用避免泥页岩黏土水化,可作为一种解决气体钻井地层出水导致井壁失稳问题的有效途径。
[Abstract]:In order to solve the problem of mud shale wellbore instability caused by gas drilling and drilling with formation effluent, according to the "lotus leaf effect" of plant leaf surface, the bionic treatment agent was selected, and the mud shale bionic treatment fluid was developed, and the laboratory performance evaluation test was carried out. The experimental results show that the bionic solution can effectively reduce the surface energy of shale and form micron-nano-protruding structures similar to those of lotus leaves or taro leaves. The shale surface is changed from hydrophilic to hydrophobic (the contact angle of clean water is more than 120 掳), which can prevent the self-absorption of shale, improve the strength of shale in aqueous solution, and maintain the stability of shale wellbore. The hydrophobic surface formed by the bionic treatment fluid has certain wear resistance and thermal stability, and is not affected by the salinity of formation water. It is suitable for neutral or alkaline conditions, but the formation temperature should not be higher than 80 鈩，

本文编号：2109417