石油钻采工艺2017，Vol.39Issue(5)：580-583,4.DOI:10.13639/j.odpt.2017.05.009
强抑制封堵钻井液体系研究及应用
Research and application of drilling fluid with strong inhibition and sealing capacity
张坤 1刘南清 1王强 1王磊磊 1龚纯武 1郭剑梅1
作者信息
- 1. 中国石油集团渤海钻探工程有限公司泥浆技术服务分公司
- 折叠
摘要
Abstract
Wellbore collapse and lost circulation tend to happen during the drilling in Fauqi Block of Missan Oilfield, Iraq. To deal with these difficulties, a new type of drilling fluid system with strong inhibition and sealing capacity was designed and developed in this paper. Based on the multi-component combination of KCl, sodium silicate and polyamine inhibitor, this system could inhibit shale hydration and dispersion effectively, and its shale swelling rate and capillary suction time are 67.6% and 64.4% lower than those in fresh water. Based on the combination of the physical sealing with chemical wall stabilization effect of silicate, the filtration loss of this system in low-permeability sand plugging test is only 9.6 mL. It is demonstrated that this system can seal the formation fractures and micro fractures effectively, reduce the intrusion of filtrate into the formation, enhance wellbore stability and avoid downhole leakage. This system was applied on site in the fifth section of Well FQCS-41 in Missan Oilfield, Iraq. It is indicated that its performance is stable with good rheological property in the process of drilling, and the borehole diameter is regular with average diameter enlargement rate of 1.2% in the fifth section.关键词
强抑制/强封堵/水基钻井液/井壁稳定Key words
strong inhibition/strong sealing effect/water-base drilling fluid/hole stability分类
能源科技引用本文复制引用
张坤,刘南清,王强,王磊磊,龚纯武,郭剑梅..强抑制封堵钻井液体系研究及应用[J].石油钻采工艺,2017,39(5):580-583,4.
