Abstract:

On the basis of the principle and method of the quantified theory Ⅰ, the influence of quantitative and qualitative variables on the circulating pressure of drilling fluids is analysed. The quantified model of calculation of the pressure is set up through the treatment of 54 groups of drilling data in 5 wells. The model ean quantitatively analyse the effect of qualititative variables (such as mud types) on the circulating pressure. And the model has also better caleulating precision to remedy the defects of theoretical calculating method.

Key words: Circulation pressure, Data treatment, Quantitative calculation, Calculating method