YZ－2型化学冲洗液的室内研究

CHEMICAL WELL-WASHING FLUID YZ-2 FDR CEMENTING

评价了３类６种表面活性剂及其复配体系的冲洗效率，在此基础上确定了ＹＺ－２型水基化学冲洗液的配方，分析了该冲洗液的作用机理，实验结果表明，ＹＺ－２型冲洗液具有较高的冲洗效率，与泥浆的配伍性好，对泥浆有稀释作用，对水泥浆有缓凝作用。

This well-washing fluid ,YZ-2, is an aqueous system containing polymeric filtrate-loss controller SY-7,disperssant FCLS. defoamer 8003 and surfactants AEO and AS in overall concentration 0. 3%. The laboratory performance evaluation shows this this fluid is compatible with both the drilling mud and cement slurry. When mixed, it thins the mud and retards the setting of the slurry. The mechanizms involved in well washing by YZ-2 is analysized.