钻井筛处理量的数学建模和试验研究

Experimental research and computer simulation on shale shaker fluid handling capacity

钻井筛的处理量是由钻井液中固相和液相的各自含量决定的 ,引入固相 -筛网干涉系数和筛网固相载荷系数 ,来计算钻井液中临界、大尺寸固相颗粒对处理量的影响 ;在综合考虑固相运移速度、钻速、井眼尺寸、钻井液流量、固相的粒度分布和筛孔面积等参数对处理量影响的基础上 ,建立了钻井筛处理量的实用计算模型。现场试验表明 ,该计算模型具有较高的精度 。

The fluid handling capacity for a shaker is determined by both liquid and solid portions of the returning drilling fluid. The actual fluid flow capacity can be related to the fluid-only (no solids) flow capacity in terms of the solids loading factor K_w representing the effect of large-sized solids, and the solids/screen interference factor I representing the effect of near-sized particles. The fluid handling capacity model for a shaker is derived as a function of solids conveyance speed, bit penetration rate, hole size, drilling fluid flow rate, particle size distribution of drilled solids and screen opening size. The results of lab test show that the model was of high simulation accuracy, it will be of significance to the select of shale shaker.