防砂作业,尤其是那些使用粒状滤料的作业,如砾石充填和压裂充填正在被越来越多地使用,并且作业环境更为苛刻。设备、作业液及施工方面的改进一直在持续。防砂滤料的设计连续地以有限数量的离散储层样品为基础。这些样品被认为能够完全代表整个产油层的真实粒径。要想明确伤害的原因及位置通常比较困难,除非使用诸如生产测井仪之类昂贵的评价工具。本文给出了研究工作的结果,成功研制出一个分析工具和一个容许改进防砂作业设计及评价的全新颗粒体系。在逐步进阶的基础上,建立了一个确定颗粒尺寸的体系,并且逐步认识了孔隙阻塞的机理。此外.设计出了粒状滤料,从而使颗粒运移导致的渗透率伤害能够逆转。给出的结果以“多孔介质内的固体颗粒流动”原理为基础。主要工作包括室内对各种砾石所做的试验及其结果。开展了现场验证,取得了激光衍射分析数据及一口海上斜井的数据。 Sand control operations, especially those that use granular media, such as gravel packing and fracturing packing, are increasingly being used and the operating environment is harsher. Improvements in equipment, fluid and construction have been ongoing. The design of the sand control filter is continually based on a limited number of discrete reservoir samples. These samples are believed to represent the true particle size of the entire pay zone. It is often more difficult to identify the cause and location of the injury unless expensive evaluation tools such as production tools are used. This paper presents the results of the research work and has successfully developed an analytical tool and a new particle system that allows for improved sand control design and evaluation. On a step-by-step basis, a system for determining particle size was established, and the mechanism of pore blockage was gradually recognized. In addition, particulate filters were designed so that permeability damage caused by particle migration can be reversed. The results given are based on the principle of “flow of solid particles in porous media”. The main work includes indoor tests on various gravels and their results. Carried out on-site verification, obtained laser diffraction analysis data and a data of offshore inclined well.