论文详情

斜井中泥页岩井眼稳定性研究

石油钻采工艺

2000年 22卷第2期

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Title

STUDY ON SHALE STABILITY IN INCLINED WELL

作者

刘平德李瑞营张梅

Authors

Liu Pingde Li Ruiying Zhang Mei

单位

大庆石油管理局, 黑龙江大庆 163413

摘要

泥页岩井眼稳定是由力学与化学两方面因素共同作用的结果。借助于井壁处有效应力的变化,将泥页岩与钻井液相互作用时页岩水化所产生的力学效应与纯力学效应结合起来,建立了斜井井眼稳定的力学、化学耦合模型,运用该模型可计算出保持井眼稳定的合理钻井液密度,并结合实例对该模型进行了验证与简要的分析。

Abstract

Shale stability is influenced by both mechanics and chemistry factors mutually. A model for wellbore stability in inclined wells is established based on the changes of effective stress near the borehole area, combining the mechanics effect produced by shale hydration with pure mechanics effect, and coupling of mechanics and chemistry factors. This model can be used to determine the suitable mud densities for holding the wellbore stability, and it is further testified and analyzed with examples.

关键词：

定向井; 泥岩; 井眼稳定; 钻井液; 岩石应力; 应力分析;

Keywords:

directional well; mudstone; hole stabilization; drilling fluid; stress analysis;

基金项目

DOI

10.3969/j.issn.1000-7393.2000.02.009