地质状况的分析与油页岩钻探存的问题分析地质状况的分析与油页岩钻探存的问题分析 摘要:本文主要介绍了地质的现状分析与油页岩钻进中存在的问题,依据钻探施工现场存在的泥浆问题,结合油页岩物化特性和井壁稳定理论,探讨了油页岩钻进的泥浆体系优选,并试验分析了泥浆体系对泥页岩膨胀的抑制效果
关键词:地质状况;油页岩;问题分析 Abstract: This paper mainly introduces the present situation analysis and oil shale drilling in geological problems, on the basis of drilling mud problems existing in construction site, with the oil shale of the characteristics and wellbore stability theory, discusses the optimization of oil shale drilling mud system, and test analysis of the inhibitory effect of mud system expansion of shale
Key words: geological condition; oil shale; problem analysis 中图分类号:F416
1 引言:油页岩是一种腐泥岩,遇水后容易发生水化膨胀、分散的问题
与泥页岩遇水产生的问题相同,对其泥浆体系的讨论类似于泥页岩
油页岩地层由于其所含粘土比例较高,容易水化,给钻进操作带来了极大的负面影响,钻井过程中常出现井径扩大、井壁失稳、卡钻、糊钻、扭矩及阻力增大等一系列井下复杂情况
所以,对油页岩地层钻探施工而言,泥浆体系是个非常重要的技术