光散射法粒度测量技术在钻(完)井液屏蔽暂堵配方设计中的应用

为了使屏蔽暂堵钻(完)井液在井壁上形成渗透率接近零的泥饼,需要测量暂堵颗粒的粒度.介绍了光散射法粒度测量技术的原理、特点,并介绍了它在储层保护钻井液配方设计中的应用.与其他传统的粒度测量方法相比,它具有测量速度快、样品用量少、测量范围宽,无需用标准物进行标定等特点,是定量设计屏蔽暂堵钻(完)井液配方、优选暂堵颗粒的好方法,在石油行业及其它领域有着广阔的应用前景.利用该技术成功地为塔里木、青海、长庆等油田设计屏蔽暂堵型钻(完)井液配方.

Application of determining the size of the particle using laser diffraction in the design of temporary plugging drilling/completion fluid formulation

The size of the particle in temporary plugging fluid must be measured in order to make the temporary plugging fluid form the mud cake whose permeability is almost zero on the sidewall.The principle and the characteristics of measuring particle size using laser diffraction are introduced,and the application of the method in the design of temporary plugging drilling /completion fluid formulation is also presented.Compared with other particle size measuring methods, this method has the advantages of high measuring speed,little quantity of sample,wide measuring range and no need for calibration.This method will have wide application prospects in petroleum industry and other fields.The temporary plugging drilling /completion fluid formulations are successfully designed for Talimu Oilfield,Qinghai Oilfield,Changqing Oilfield etc.using this method.