Preparation method and application of amphiphobic temporary plugging agent

• Main Authors: ZHAO HUAIZHEN, WANG WEI, LI XIULING, WANG LIPING, XIANG SHUFANG, JIA JIANGHONG, LI QIONG, LUO YUNFENG, YANG CHUNXU, QIAO SHUWEN, LAN QIANG
• Format: Patent
• Language: Chinese; English
• Published: 08.12.2023
• Subjects: ADHESIVES; CHEMISTRY; DYES; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; POLISHES

The invention provides a preparation method and application of an amphiphobic temporary plugging agent. The amphiphobic temporary plugging agent adopts graft modified nano calcium carbonate, can change the surface properties of rocks, realizes hydrophobic and oleophobic purposes, reduces the surface tension of filtrate to the greatest extent, prevents damage caused by instantaneous filtration loss, can enter a near well wall to form a compact plugging layer, and reduces the loss of the plugging layer in the drilling process. And the filtrate intrudes into the stratum to protect the low-permeability oil-gas reservoir. 本发明提出了一种双疏暂堵剂的制备方法和应用；双疏暂堵剂采用接枝改性的纳米碳酸钙，可改变岩石表面性质，实现疏水、疏油目的，同时最大程度地降低滤液表面张力，阻止瞬时滤失引起的损害，而且纳米尺寸的双疏暂堵剂可进入近井壁形成致密的封堵层，降低钻井过程中，滤液对地层侵入，达到保护低渗油气层。