Department of Chemistry, King Fahd University of Petroleum & Minerals, Dhahran, 31261, Saudi Arabia.
Department of Chemistry, King Fahd University of Petroleum & Minerals, Dhahran, 31261, Saudi Arabia.
Carbohydr Res. 2020 May;491:107960. doi: 10.1016/j.carres.2020.107960. Epub 2020 Mar 5.
In this work, we report the preparation of a novel partially aminated and inexpensive water-soluble acrylic acid grafted activated carbon represented as C-g-AA-NH for efficient inhibition of shale hydration. The as-prepared C-AA-NH was subjected to Fourier transform infrared spectroscopy (FTIR), Nuclear magnetic resonance (NMR), and thermal gravimetric analysis (TGA). This was followed by an evaluation of the capability of the material to inhibit shale through various tests including anti-swelling, shale recovery, and immersion tests. Our results indicated that 2% of C-g-AA-NH drastically reduced water invasion into shale by combining plugging property of the core-centered carbon nanoparticles with the inhibition ability of the partially aminated acrylic acid component by adsorption on the clay surface through hydrogen bonding. In this manner, the plugging of the pore throat of the interlayer spacing of the shale formation could easily be achieved. This approach could significantly control fluid loss, reduce permeability and filtrate volume of drilling mud by forming a thin film on the formation surface due to the nano-nature of the carbon component of the polymer.
在这项工作中，我们报告了一种新型部分胺化且价格低廉的水溶性丙烯酸接枝活性炭的制备，该活性炭代表为 C-g-AA-NH，可有效抑制页岩水化。所制备的 C-AA-NH 经过傅里叶变换红外光谱（FTIR）、核磁共振（NMR）和热重分析（TGA）进行了表征。随后，通过各种测试评估了该材料抑制页岩的能力，包括防膨、页岩回收和浸泡测试。我们的结果表明，2%的 C-g-AA-NH 通过将核中心碳纳米粒子的封堵特性与部分胺化丙烯酸组分通过氢键吸附在粘土表面上的抑制能力相结合，可显著降低水侵入页岩的程度。通过这种方式，很容易实现页岩层间间距的孔隙喉道封堵。由于聚合物的碳成分具有纳米性质，因此它可以在形成表面形成薄膜，从而显著控制流体损失，降低钻井泥浆的渗透率和滤液体积。
