高温高压多功能组合损害评价系统研制及应用

Research and Application of High-temperature and High-pressure Multifunction Damage Evaluation Apparatus

针对水平井、多分支井钻井、完井、开发生产和增产改造过程中出现的越来越复杂的损害特征,综合国内外已有损害评价实验仪器的优点,研制出了新型高温高压多功能组合损害评价系统,该评价系统具有功能多、自动化程度高的优点;应用该系统模拟水平井不同方向上的动态滤失情况进行的初步实验结果显示,由于储层渗透率各向异性以及受浸泡时间、钻具偏心及钻井完井液体系等因素的影响,水平井顶部、侧面、底部表现出不均匀非均质损害特性,优质滤饼的形成可以降低滤液侵入量、减少损害,弱化水平井各种损害因素的影响。

A high-temperature and high-pressure multifunction damage evaluation apparatus was developed aiming at the more and more complicated damages during drilling completion and stimulation in horizontal and branch wells. This apparatus has some advantages such as multifunction and automation. The result of the application that simulates the dynamic fluid loss of horizontal well shows that affected by the permeability nonisotropy of reservoirs, soak time and decenter pipe, there are anisotropic damages on the top side and bottom of horizontal well. As well as the thin and tough mud cake can reduce the damages from filtration fluid and other factors.