本文選題：泥頁巖 + 井眼穩(wěn)定��； 參考：《石油鉆探技術(shù)》2017年03期

【摘要】：為解決氣體鉆井鉆遇地層出水引發(fā)的泥頁巖井壁失穩(wěn)問題,根據(jù)植物葉面的"荷葉效應(yīng)",優(yōu)選了仿生處理劑,研制了泥頁巖仿生處理液,并進行了室內(nèi)性能評價試驗。試驗結(jié)果表明,該仿生處理液能有效降低泥頁巖表面的表面能,形成類似于荷葉或芋葉表面的微米—納米突起結(jié)構(gòu),實現(xiàn)泥頁巖表面從親水向疏水轉(zhuǎn)變(清水接觸角大于120°),從而達到阻止泥頁巖自吸水的作用,提高泥頁巖在水溶液中的強度,維持泥頁巖井壁穩(wěn)定;同時,該仿生處理液形成的疏水表面具有一定耐磨性和熱穩(wěn)定性,不受地層水礦化度的影響,適用于中性或堿性條件,但地層溫度不宜高于80℃。研究表明,利用仿生學原理,通過控制泥頁巖的自吸水作用避免泥頁巖黏土水化,可作為一種解決氣體鉆井地層出水導致井壁失穩(wěn)問題的有效途徑。
[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 擄), 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，

本文編號：2109417