对钻井液的亚甲基蓝容量及膨润土含量的探讨

PROBE INTO THE METHYLENE BLUE CAPACITY AND BENTONITE CONTENT OF DRILLING FLUIDS

由钻井液亚甲基蓝容量计算钻井液的膨润土当量的计算公式不是一个普遍适用的公式,其中的换算系数是在假定了膨润土的阳离子交换容量为某一值后,而推导出的。分析和试验表明不同粘土的阳离子交换容量值相差很大,要准确应用亚甲基蓝容量计算膨润土含量,必需知道所用膨润土的阳离子交换容量。因为用亚甲基蓝容量可估算钻井液中固相的总阳离子交换容量,所以由亚甲基蓝容量计算的结果定义为"膨润土的当量"比较恰当。

It is not universally applicable that the formula on bentonite content of drilling fluid is calculated from methylene blue capacity, and the coefficient is derivative from a presumption about known cation exchange capacity.Clay cation exchange capacity is not a regular number.The accurate cation exchange capacity number must be known if bentonite content is calculated accurately.It is appropriate that 'the bentonite equivalent weight' is named by the calculated result on the basis of methylenne blue capacity.