摘要
缅甸D区块产层以天然气为主,地层情况非常复杂,地层垮塌、缩径、漏失、井涌等井下复杂情况共存,安全密度窗口窄,提高固井质量的措施受到了很大限制,顶替效率很难保证,防漏、防气窜难度大。分析了固井技术的主要难点,提出了相应的固井方案和技术措施,包括采用多种堵漏方法提高地层承压能力、正注反注固井工艺、低黏度和低切力前导钻井液、大量冲洗液或隔离液、多凝梯度密度非渗透水泥浆柱结构、复合流态顶替技术、使用顶部封隔尾管悬挂器等。该套窄密度窗口防漏防窜固井技术在YAGYI-1、PATOLON-2和YAGYI-1X井进行了实践,提高了固井质量,对该区块的固井施工具有一定指导意义。
Down hole problems were encountered in Block D in Burma,such as collapsing,tight hole,leaking and kick.These problems resulted in narrow safety window,limitation of cementing quality,uncertainty of displacement efficiency and difficulties of prevention of leaking and channeling.To solve these problems,many measures were taken,including several sealing methods,squeezing from drill stem and annular,low viscosity drilling fluid,abundant spacer,non-permeable gradients cement column,compound flow pattern displacement and liner hanger etc.,and field application in 3 wells was satisfactory.
出处
《钻井液与完井液》
CAS
2010年第5期61-64,共4页
Drilling Fluid & Completion Fluid
基金
渤海钻探工程有限公司课题"缅甸伊洛瓦底盆地高压油气井固井技术研究"(2009Z007K)部分研究内容
关键词
固井
固井质量
窄安全密度窗口
防漏
防气窜
天然气井
缅甸
Cementing
Cementing quality
Prevent damage to formation
Prevent leaking
Prevent channeling
Natural gas
Block D
Burma
