西南石油大学学报（自然科学版）2025，Vol.47Issue(5)：134-142,9.DOI:10.11885/j.issn.1674-5086.2023.03.14.02
基于壁面剪切速率相等的固井冲洗效率评价
Evaluation of Cementing Flushing Efficiency Based on the Same Wall Shear Rate
摘要
Abstract
The flushing efficiency is a key index to evaluate the performance of flushing fluid,which directly affects the opti-mization,dosage,and then the cementing quality.However,the current evaluation methods for flushing efficiency are either at room temperature and pressure represented by the rotational viscometer method,and there is no process of water loss to form a mud cake,or there is little connection between the flushing speed of the device and the annulus displacement.To solve this problem,based on the principle of equal wall shear rate,the rotating speed model of the flushing efficiency evaluation device was established during mud cake formation and flushing,and the evaluation method of mud cake flushing efficiency under high temperature and high pressure was proposed.The method combines the flow of drilling fluid and flushing fluid in the well with the flow in the flushing efficiency evaluation device.The applicability analysis of high temperature and high pressure flushing efficiency evaluation method shows that the high temperature and high pressure flushing efficiency evaluation method has good repeatability,and the experimental results have high comparison,which can provide a basis for the optimization of flushing performance evaluation and application process parameters optimization.In addition,it is found that the flushing ef-ficiency decreases with the increase of the formation time of mud cake water loss and the pressure difference,and increases quickly at first and then slowly with the increase of the flushing time and displacement.关键词
壁面剪切速率/冲洗效率/冲洗液/固井/高温高压Key words
wall shear rate/flushing efficiency/flushing fluid/cementing/high temperature and high pressure分类
石油、天然气工程引用本文复制引用
冯颖韬,崔策,王有伟,黄峰,袁彬..基于壁面剪切速率相等的固井冲洗效率评价[J].西南石油大学学报（自然科学版）,2025,47(5):134-142,9.基金项目
四川省青年基金(2023NSFSC0926) （2023NSFSC0926）
