A well treatment fluid contains a surface modifying treatment agent having an anchor and a hydrophobic tail. The surface modifying treatment agent is an organophosphorus acid derivative. After the well treatment fluid is pumped into a well penetrating the subterranean formation, the anchor binds to the surface of the formation. The subterranean formation is a siliceous formation or a metal oxide-containing subterranean formation. The anchor bonds to a Si atom when the formation is a siliceous formation and to the metal of the metal oxide when the formation is a metal oxide-containing formation. After being bound to the surface of the formation, frictional drag within the well is reduced. This allows for faster recovery of formation fluids. The bonding of the surface modifying treatment agent onto the formation may further be enhanced by first pre-treating the formation with a non-aqueous fluid. By increasing the number of sites for the surface modifying treatment agent to bind onto the surface of the subterranean formation, productivity is improved.
一种油井处理液含有一种具有锚和疏
水尾部的表面改性处理剂。表面改性处理剂是一种有机
磷酸衍
生物。将油井处理液泵入穿透地下地层的油井后,锚会与地层表面结合。地下地层是
硅质地层或含金属氧化物的地下地层。当地层为
硅质地层时,锚与
硅原子结合;当地层为含金属氧化物地层时,锚与金属氧化物的
金属结合。在与地层表面结合后,井内的摩擦阻力会减小。这样就能更快地回收地层流体。首先用非
水性流体预处理地层,可进一步增强表面改性处理剂与地层的结合。通过增加表面改性处理剂与地下地层表面结合的位点数量,可提高生产率。