钻井液与完井液2025，Vol.42Issue(3)：398-405,8.DOI:10.12358/j.issn.1001-5620.2025.03.017
清除井壁滤饼提高固井质量的冲洗液性能影响研究
Study on Factors Affecting Properties of Flushing Fluids for Removing Mud Cakes to Improve Well Cementing Quality
摘要
Abstract
Filter cakes generated during drilling on the surfaces of the borehole walls seriously affect the bonding quality of the interface between the cement sheath and the borehole walls if the filter cakes are not removed,resulting in poor cementing quality.Most of the current researches on improving cementing quality aims to displace the drilling fluid completely and does not consider the influence of the filter cakes.To improve the cementing quality,three Herschel-Bulkley fluid flow models for spacer fluid,drilling fluid,and filter cake in a three-dimensional eccentric annulus were established,taking into account the regulating effect of the flushing fluid on the drilling fluid.The effects of the changes in the density,consistency coefficient,flow behavior index and yield point of the drilling fluid affected by the flushing fluid on the flushing efficiency of the drilling fluid and filter cakes were systematically studied.The results show that reducing the density and rheological parameters of the flushing fluid can improve the flushing efficiency of the drilling fluid,but it will reduce the flushing efficiency of the filter cake.The density and rheological parameters of the flushing fluid are not the smaller the better.Under the condition of ensuring a high flushing efficiency of the drilling fluid,appropriately increasing the density and rheological parameters of the flushing fluid to maintain relatively high mud viscosity and gel strengths is beneficial to promoting the removal of the filter cakes.Prioritizing the regulation of the flow behavior index of the flushing fluid to make the flow behavior index of the drilling fluid reach an ideal value will significantly improve the cementing quality.The research results will provide theoretical guidance for optimizing the performance parameters of flushing fluids and for improving cementing quality.关键词
固井质量/赫巴流体/钻井液/滤饼/流变性能/数值模拟Key words
Well cementing quality/Herschel-Bulkley fluid/Drilling fluids/Filter cake/Rheological properties/Numerical simulation分类
能源科技引用本文复制引用
吴彦先,赵增新,巩加芹,张浩,吴宝康,张辉,李军,李芷琦..清除井壁滤饼提高固井质量的冲洗液性能影响研究[J].钻井液与完井液,2025,42(3):398-405,8.基金项目
中石油股份有限公司科研项目"深地煤岩气成藏理论与效益开发技术研究"(2023ZZ18). （2023ZZ18）
