摘要
流变性是钻井液性能的重要参数,常规流变模型表征这一特性存在较大偏差,根据相关研究结果,提出新的流变模型=aebγ-ce-dγ及求解方法,并编制了相应计算程序。经两种钻井液实测流变数据拟合验证,新建模型拟合的误差平方和小,确定系数大,其拟合效果好于常规流变模型的拟合效果,可更好地表征钻井液的流变特性。因此,该模型为钻井液流变特性较精确的表征方法,建议进行推广应用。
According to the characteristics of rheological curves of drilling fluids, a new rheological model is proposed. The new model has strong non-linear characteristics, according to the Newton algorithm, and MATLAB tools are used to compile the calculation program to optimize the rheological parameters, and SSE, RMSE and R 2 are selected to estimate the fitting effect of rheological data. The measured data show that the model error is small, and the determination coefficient is large, so the model in this paper can greatly improve the characterization degree of rheological data. Therefore, the model is a more accurate characterization method for the rheological properties of drilling fluids, and it is recommended to promote the application of the model.
作者
刘世界
雷英
秦鹏
杨宇光
蔡振华
Liu Shijie;Lei Ying;Qin Peng;Yang Yuguang;Cai Zhenhua(Unconventional Oil & Gas Technology Research Institute, Ener Tech-Drilling & Production Co., CNOOC, Tianjin, 300457, China;Central Sichuan Oil and Gas District, PetroChina Southwest Oil and Gas Field Company, Suining, Sichuan, 629000, China;China United Coalbed Methane Co., Ltd., Beijing, 100011, China)
出处
《天然气与石油》
2019年第4期78-82,共5页
Natural Gas and Oil
基金
中国海洋石油总公司重大科研项目“致密砂岩气产能指数及预测方法研究”(CNOOC-KJ135KJXMNFGJ2016-05)
关键词
钻井液
流变模式
数学模型
牛顿迭代算法
Drilling fluid
Rheological pattern
Mathematical model
Newton algorithm
