入井液表面张力与储层损害关系的实验室研究

Relation Between Surface Tension of Incoming Fluids for Oil Production Engineering and Formation Damage

在不同渗透率和不同润湿性的岩石中，研究了采油工程入井液的表面张力对入井液返排效率和岩石有效渗透率损害的影响。结果表明，在相同渗透率和润湿性的岩石中，入井液的返排率随入井液表面张力的降低而提高，岩石渗透率损害率随入井液表面张力的降低而下降；相同表面张力的入井液，进入高渗透性岩石中比进入低渗透性岩石中具有更高的入井液返排率和更低的渗透率损害率；

Effects of surface tension of incoming fluids for oil production engineering on fluid's returning efficiency and rock permeability damage have been studied on rocks with different permeability and wettability The resultes show that the returning efficiency is enhanced and permeability damage is decresed while surface tension is decreased in the same permeable and wettable rocks There are higher returning efficiency and lower permeability damage in high permeable rocks than in low permeable rocks and there are lower returning efficiency and higher damage of permeability in water wet rocks than in oilwet rocks while surface tension is alike