不同条件下泥饼固化提高固井二界面胶结强度的实验研究

采用室内模拟实验方法,对不同养护温度与泥饼厚度条件下泥饼固化提高固井二界面胶结强度的情况进行了实验研究。结果表明:在养护温度为45℃的条件下,泥饼厚度为0.5mm和1.0mm时,泥饼固化后固井二界面胶结强度分别提高了230.86%～4 538.74%和757.30%～106 537.50%;在养护温度为80℃的条件下,泥饼厚度为0.5mm和1.0mm时,泥饼固化后固井二界面胶结强度分别提高了656.28%～1 979.69%和331.19%～5 258.82%。通过红外光谱测试结果,探讨了泥饼固化提高固井二界面胶结强度的主要原因,并对其影响因素进行了分析。

Experimental study on increasing of the bonding strength at cement-formation interface by mud cake solidification method under different conditions

Imitation method is used in laboratory to study mud cake solidification for increasing the bonding strength of cement-formation interface under different temperatures and different cake thickness.The results show that the bonding strength of cement-formation interface increased by 230.86%～4 538.74%and 757.30%～106 537.50% respectively when the cake thickness are 0.5mm and 1.0mm at the curing temperature 45℃;the bonding strength of cement-formation interface increased by 656.28%～1979.69%and 331.19%～5 258.82%respectively when the cake thickness are 0.5mm and 1.0 mm at the curing temperature 80℃.Finally,main cause of mud cake solidification for increasing the bonding strength of cement-formation interface is investigated by infrared spectrum test results and influencing factors is analyzed.