钻井液流变参数计算方法的分析及流变模式的优选

钻井液流变模式的合理选择和流变参数的准确计算是钻井液优化设计的前提。针对目前比较常用的5种钻井液流变模式,分析了流变参数的常规计算方法并指出了其不足;利用回归分析的数学方法,对5种流变模式下流变参数进行了数据处理;开发了计算机软件,对流变参数的2种计算方法进行了比较和分析,充分体现线性回归的先进性和准确性。通过计算机软件计算流变参数,输出各流变模式的流变曲线,从而实现流变模式优选。

Analyses on Calculation Methods of Rheological Parameters of Drilling Fluid and Optimization of Rheological Model

The reasonable selection for drilling fluid rheological model and the precise calculation for rheological parameters is the preconditions for optimizing drilling fluid design. After comparison between five drilling fluid rheological models which are currently normally used, the regular calculation methods for rheological parameters were analyzed and their insufficiencies were point out. The rheological parameters under five models were data processed with regression analyses. Some calculation software was developed out. Comparison between and analyses of two calculation methods for rheological parameters were made. The advancement and veracity of linear regression were shown out. Optimization of rheological models was realized through calculation of rheological parameters by computer software and output of rheological curves for respective models.